The velocity of the boat immediately after the package is thrown with a speed of 10.0 m/s, assuming it was initially at rest and ignoring water resistance, can be calculated using the equation of conservation of momentum.
The equation states that the total momentum of the boat and the package before the throw is equal to the total momentum of the boat and the package after the throw.
In this case, the initial momentum of the boat is 0 since it was initially at rest, and the initial momentum of the package is 0.7 x 10.0 m/s (due to the mass of the package being 5.70 kg and the speed of 10.0 m/s).
The total initial momentum is thus 0.7 x 10.0 m/s. After the throw, the momentum of the package is 0 since it is no longer part of the system, and the momentum of the boat is equal to the momentum of the package before the throw, which is 0.7 x 10.0 m/s. The velocity of the boat after the throw can be calculated by dividing the momentum of the boat (0.7 x 10.0 m/s) by the mass of the boat (50.0 kg). This yields a velocity of 0.14 m/s.
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7. A 100 kg log is dragged across a horizontal siand of concrete. 7.1 Show by calculation that the weight of the log is 980 N. Use the equation w = mg in which g = 9,8 m.s-2. (Refer back to Unit 6 on page 30.)
The weight of the log is 980N
What is the Weight of an object?
The force of gravity acting on an object is its weight, which is equal to its mass times the acceleration of gravity, or w = mg. The newton is the SI unit for weight since it is a force.
The weight of a 100 kg log can be calculated using the equation w = mg,
where m is the mass of the log (100 kg) and g is the acceleration due to gravity (9.8 m/s^2).
So, w = (100 kg)(9.8 m/s^2) = 980 N.
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Electric potential is the amount of potential energy per unit of charge
Explanation:
Yes, that is correct. Electric potential is a measure of the electric potential energy per unit of electric charge at a certain point in an electric field. It is often denoted by the symbol V and is measured in volts (V).
a ringing bell is sending a longitudinal wave to your ear. what else is true about the longitudinal wave? check all that apply.
Longitudinally, all sound waves exist. Parallel to the wave's motion, energy is transmitted. Mechanics can produce longitudinal waves. Transverse electromagnetic waves are also possible.
What are the characteristics of electromagnetic waves?The electromagnetic spectrum is a group of wave types that includes electromagnetic waves and has some similar characteristics. All electromagnetic waves have the same speed in a vacuum, which is the speed of light, or 300,000,000 metres per second, and are transverse waves that can pass through a vacuum.
The electromagnetic wave's origin is unknown?To put it simply, a time-space-varying electric field creates a varying magnetic field at right angles to it, and the magnetic field creates an electric field at right angles to that as well. This process keeps going to create oscillations of the electric and magnetic field components, which are what make up electromagnetic waves.
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A ringing bell is sending a longitudinal wave to your ear. What else is true about the longitudinal wave? Check all that apply.
A. All sound waves are longitudinal.
B. Energy is transferred perpendicular to the wave’s motion.
C. Mechanical waves can be longitudinal.
D. Electromagnetic waves can be longitudinal.
E. Longitudinal waves require a medium to travel through.
a heat transfer of 9.5 x 105 j is required to convert a block of ice at -150c to water at 150c. what was the mass of the block of ice?
The block of ice had a mass of approximately 4.94 kg.
In a system, what is heat transfer?
Any material made up of atoms and molecules can transmit heat through it. There are numerous ways in which the atoms are constantly moving. All matter has heat, or thermal energy, which results from atomic and molecular motion.
With increased molecular mobility, heat energy levels rise. However, when referring to heat transfer, it simply means the procedure by which heat is transferred from a body with a high temperature to one with a low one.
In thermodynamic systems, heat transmission is defined as
A temperature difference between a system and its surroundings causes heat transfer across the system's boundary.
It's odd that the temperature difference is referred to as a "potential."
q = mLf + mLf + mCp(T2 - T1)
where:
q = heat transfer (Joules)
mLf = heat of fusion of ice (Joules/kg)
mLf = 333.5 J/g
m = mass of ice (kg)
Cp = specific heat capacity of water (Joules/kg/°C)
Cp = 4.18 J/g/°C
T1 = initial temperature of ice (-150°C)
T2 = final temperature of water (150°C)
Rearranging the equation for mass:
m = q / (mLf + mLf + mCp(T2 - T1))
Substituting values:
m = 9.5 x 105 J / (333.5 J/g + 333.5 J/g + 4.18 J/g/°C × 300°C)
m = 9.5 x 105 J / (666.9 J/g + 1254.4 J/g)
m = 9.5 x 105 J / 1921.3 J/g
m = 9.5 x 105 J / 1921.3 J/g × (1 kg / 1000 g)
m = 9.5 x 105 J / 1921.3 J/g × (1 kg / 1000 g)
m = 4.94 kg
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What property can be measured without changing the substance?
A substance's physical property is indeed a quality that can be seen or quantified without affecting the substance's identity. Color, density, toughness, boiling and melting points are examples of physical qualities.
What characteristics may be evaluated without modifying the substance?Physical characteristics are characteristics that may be seen or quantified without modifying the makeup of the substance. Some examples include the freezing, melting, and boiling points as well as color, hardness, and fragrance.
What characteristics may be identified without altering the nature of the substance?Physical qualities are those that can be ascertained about a substance without altering its makeup. Physical qualities include traits like critical temperature, boiling point, density, reactivity, color, odor, etc.
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how many volts of electricity can a human withstand
A fair general rule is that if a shock reaches 2,700 volts or more, the victim frequently dies or sustains serious injuries. When the voltage reaches above 11,000 volts, a victim typically dies.
Could you withstand 10,000 volts?Electrical engineering professor at the University college San Diego, Dr. Michael S. Morse, says but while 10,000 volt can be lethal in some situations, it is also feasible that something could have 10,000 voltages behind it and yet be reasonably safe.
Which is more lethal, current or voltage?Personnel would never print and post warning signs warning of danger from high voltage if the voltage posed no threat. In general, the idea that "current kills" is true. Electric current is what causes cardiac fibrillation, muscle freezing, and tissue burning.
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materials that usually are good conductors of electricity?
Metals such as copper, aluminium, silver, and gold, graphite, electrolytes such as aqueous salt solutions, and semiconductors such as silicon and germanium are examples of materials that are typically good conductors of electricity.
What is a simple definition of electricity?The movement of electric energy or charge is known as electricity. It is a secondary energy source, meaning that we obtain it through the conversion of main energy sources like coal, natural gas, oil, nuclear power, and other natural sources. The flow of electrons between two places when there is a voltage differential between them constitutes electricity, which is a sort of energy that makes it possible to produce an electric current.
What type of energy is electricity?The electricity we use is a secondary energy source since it is produced by converting primary energy sources, such as coal, natural gas, nuclear energy, solar energy, and wind energy, into electrical power. Despite being independent properties, voltage and current interact in electrical circuits. Both are necessary for the circuit to function properly. Current in a circuit flows due to the force of voltage.
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When a solute is added to a liquid, the freezing point of the resulting solution is _____ than the freezing point of the pure liquid.A. higherB. no differentC. lower
The melting point of the clear supernatant is lower than for the 0 ° c of the original liquid when a solution is added to it.
How do melting and freezing points differ?The temperature at which a material becomes liquid or solid is known as the melting or freezing point of that substance. Depending on the degree of bonding in between particles plus their mass, various substances have varying melting points.
Is 0 always the freezing point?Water typically has a freezing point and melting point of 0 °C or 32 °F. If supercooling takes place or there are pollutants in the water that might cause freezing point elevation to happen, the degree may be lower.
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PLEASE HELP Red tape can be used to repair a broken tail light on a car. In one or two sentences explain how different colors of light are transmitted, reflected and absorbed by this kind of tape.
Answer:
When sunlight shines through an orange solution, the violet, blue and green wavelengths are absorbed. The other colors pass through. The transmitted light is the light we see, and it looks orange. Colored objects look the way they do because of reflected light.
Explanation:
a racer accelerates from rest at constant acceleration for 2 seconds and travels 25 meters. if they then accelerate at the same constant acceleration for an additional 8 seconds, what is their total distance traveled in meters over the entire 10 seconds?
Distance traveled in a given amount of time is equal to the average speed. utilizing the formula s=ut+21at2s=510+212102s=50+100=150m.
Why do we measure distance, exactly?By understanding how far an object is from us, we may calculate its actual size. It is possible to calculate the space that an object takes up in the sky. The actual size of an object can then be determined by taking into account its distance. The further away something is, the smaller it appears.
What is a meter example?A common metric length from around three feet, 3 inches is called a metre. This proves that in the metric system, a meter is a measuring unit. Objects up to one meter in length include yardsticks, baseball bats, and guitars. Distances in sporting events like run and swimming are also measured in meters.
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the hour, minute, and second hands on a clock are 0.25 m, 0.30 m and 0.35 m long, respectively. what are the distances traveled by the tips of the hands in a 30 min interval?
The points of the hour hand, minute hand, and second hand cover 0.087 metres, 1.3 metres, and 85 metres in a 40-minute period, respectively.
How far do the tips of the hands move in a period of 25 minutes?The minute hand's tip completes one full rotation in 60 minutes, as we also know. Thus, it will finish the 25/60th of the circle in 25 minutes. The moved distance is therefore equal to 2r * 25/60 inches, or 11.78 inches.
What is the length? travelled on the hour hand's pointer?The radius of the circle the point creates is equal to the distance it travels. the radius of the circle formed by the tip and the angle that is covered.
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a 90 kg fullback running east with a speed of 5.00 m/s is tackled by a 95.0 kg opponent running north with a speed of 3 m/s. if the collision is perfectly inelastic, calculate the speed and direction of the players just after the tackle and determine the mechanical energy lost as results of the collision. account of the missing energy
which two attributes are the most weakly correlated? engine size and cylinders acceleration and mpg engine size and mpg acceleration and vweight
Engine size and mpg (miles per gallon) are the two attributes that are most weakly correlated
Which two attributes are most weakly correlated?Engine size and mpg (miles per gallon) are the two attributes that are most weakly correlated. Engine size and mpg have a negative correlation, meaning as engine size increases, mpg decreases.
Acceleration and engine size have a positive correlation, meaning as engine size increases, acceleration also increases. This correlation is stronger than the correlation between engine size and mpg.
Acceleration and vehicle weight have a negative correlation, meaning as vehicle weight increases, acceleration decreases. This correlation is also stronger than the correlation between engine size and mpg.
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2. Which is done by a machine?
A -increase work
B- increase force
C- change force
direction
D-increase velocity
A machine can increase force, change force direction, increase velocity.
What is work?A machine is a physical system that use power to exert forces, regulate movement, and carry out an action. The phrase is frequently used to refer to both manmade devices that use engines or motors as well as natural biological macromolecules like molecular machines.
To make the process easier, machines are utilized. In general, it is believed that machines enhance the quantity of work done in order to do the task quickly. However, this is untrue because energy is a form that can only be transferred, not created or destroyed, as work is a form of energy.
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consider a pool game being played on a pool table on the deck of an aircraft carrier near the bow (front). assume that the carrier is moving north at 25.0 m/s . as a result of the initial break, a ball flies over the edge of the table and over the edge of the deck with a horizontal component of velocity directed toward the bow of the ship of 5.00 m/s . what is vbw , the horizontal component of the speed with which this ball strikes the water in front of the ship (i.e., what is the speed of the ball relative to the water)?
The horizontal component of the ball's speed relative to the water is around 30.0 m/s.
What is velocity?The direction of movement of the body or item is defined by velocity. Speed is fundamentally a scalar number. Velocity is, in essence, a vector quantity. It is the pace at which distance changes. It is the displacement rate of change. The velocity of an object is the rate at which its location changes in relation to a frame of reference and is a function of time. Velocity is similar to a speed and direction of motion specification (e.g., 60 km/hr to the north).
Here,
To find the horizontal component of the speed with which the ball strikes the water, we need to consider both the velocity of the carrier and the horizontal component of the velocity of the ball.
The horizontal component of the speed of the ball relative to the water is given by:
v_bw = v_bs + v_ship
where:
v_bw is the horizontal component of the speed of the ball relative to the water
v_bs is the horizontal component of the velocity of the ball (5.00 m/s)
v_ship is the velocity of the carrier (25.0 m/s)
So, the horizontal component of the speed of the ball relative to the water would be:
v_bw = 5.00 m/s + 25.0 m/s = 30.0 m/s
The horizontal component of the speed of the ball relative to the water is approximately 30.0 m/s.
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a cube that measures 2 cm on each side has a surface area to volume ratio of
Size and SA:V are inversely related for a certain form. The ratio of a cube with sides of 2 cm is 3 cm1, which is half of a cube with sides of 1 cm.
In mathematics, what is the surface area?The area is the area occupied by a this double flat surface. It has a square unit of measurement. A three-dimensional object's surface area is the area occupied by its outside surface.
Describe surface area with an example.A 3D object's surface is the entire area that all of its faces cover. For instance, the surface area of a cube is its amount if we wish to determine how much paint is needed to paint it. It is consistently expressed in square units.
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true or false? an equipotential line passing through a point is perpendicular to the direction of the electric field at that point.
The statement of equipotential lines passing through a point perpendicular to the direction of the electric field at that point is true.
Understanding the potential fieldEquipotential fields are fields where every point in the field has the same electric potential. For an electric charge, the equipotential field is a spherical shell and the electric field lines are radial and always perpendicular to the equipotential field. Any electric charge transferred in the equipotential field requires no work.
In mathematics and physics equipotential refers to a region in space where every point in it has the same potential. In electricity, it can be defined as the position of points that have similar potential values. Equipotentials are often referred to as equipotential surfaces or fields, namely fields that have a set of points that are spread continuously and have similar potentials.
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The acceleration due to gravity on the moon is 1.62 m/s^2, approximately a sixth of the value on earth. for a given initial velocity v0, and a given launch angle θ0, the ratio of the range of an ideal projectile on the moon to the range of the same projectile on earth, rmoon/rearth, will be approximately?
The ratio of the ideal projectile distance on the moon to the same projectile distance on earth, moon/back, is approximately (the acceleration of gravity on the moon is 1.62 m/s², about one-sixth of the acceleration due to gravity on earth. for a given initial velocity v0 , and the specified launch angle θ0) is ⅙ (option B)
The initial velocity, launch angle, and acceleration due to gravity all affect a projectile's range. The formula for an ideal projectile's range is as follows:
R = v0²sin (2θ0) / g
Where,
v0 = the initial velocity (m/s)
θ0 = the launch angle
g = the acceleration due to gravity
The acceleration caused by gravity is 1.62 m/s² for the moon and 9.8 m/s² for the earth. Ranges on the moon and ranges on earth can be expressed as follows:
R moon / R earth = (1.62 sin (2θ0)) / g
sin (2θ0) = 1.62 / 9.8
Approximately ⅙
Consequently, an ideal projectile's range on the moon is around a sixth of its range on Earth.
The question is incomplete, it should be:
The acceleration due to gravity on the moon is 1.62 m/s², approximately a sixth of the value on earth. for a given initial velocity v0, and a given launch angle θ0, the ratio of the range of an ideal projectile on the moon to the range of the same projectile on earth, rmoon/rearth, will be approximately?
A. ⅓
B. ⅙
C. 1
D. 1/12
E. ⅕
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at the instant of take-off, a long jumper has a horizontal velocity of 9.47 m/s and a vertical velocity of 3.21 m/s. find the angle of take-off (relative to the horizontal) and the magnitude of the resultant velocity vector.
The angle of take-off relative to the horizontal is 70.97 ° and the magnitude of the resultant velocity vector is 9.99 m/s.
The horizontal velocity = 9.47 m/s
The vertical velocity = 3.21 m/s
The resultant velocity is expressed by using Pythagoras as follows :
Resultant Velocity , V = √ Vx² + Vy²
Resultant Velocity , V = √ (9.47 m/s )² + ( 3.21 m/s)²
Resultant Velocity , V = 9.99 m/s
The angle of take - off :
tan Ф = Vy / Vx
Ф = tan⁻¹ ( 9.47 / 3.21 )
= 70.97 °
Thus, the angle is 70.97 ° .
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what is the potential energy for the child just as she is released, compared with the potential energy at the bottom of the swing?
The required potential energy at the bottom of the swing is calculated to be 78.7 J.
The mass of the child is given as m = 20 kg
Length of the rope L = 1.8 m
Angle of the rope from the vertical after pulling is θ = 39°
The swinging motion of the child is shown in the figure in the attachment below.
Let us calculate the potential energy for the child at extreme position with respect to the bottom position,
PE = m g ( L - L cos θ) = 20× 9.81 × 1.8 ( 1 - cos 39°) = 78.7 J
Here, g is acceleration due to gravity
Thus, the potential energy for the child just as she is released, compared with the potential energy at the bottom of the swing is calculated to be 78.7 J.
The given question is incomplete. The complete question is 'A 20 kg child plays on a swing having support ropes that are 1.8 m long. A friend pulls her back until the ropes are 39° from the vertical and releases her from rest.'
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a vw beetle goes from 0 to 60.0 mi/h with an acceleration of 2.35 m/s2. (a) how much time does it take for the beetle to reach this speed? (b) a top-fuel dragster can go from 0 to 60.0 mi/h in 0.700 s. find the acceleration (in m/s2) of the dragster.
So, with an acceleration of 2.35 m/s², the VW Beetle takes 11.38 seconds to reach 60.0 miles per hour. As a result, the top-fuel dragster's acceleration is 38.3 m/s².
What is acceleration?The rate of change of velocity is defined as acceleration. Acceleration usually indicates that the speed is changing, however this is not always the case. When an item goes on a circular course with a constant speed, it is still accelerating since its velocity direction changes. Acceleration is the rate at which velocity varies over time, both in terms of speed and direction. A point or object travelling in a straight path is accelerated if it accelerates or decelerates.
Here,
a. To find the time it takes for the VW Beetle to reach 60.0 mi/h with an acceleration of 2.35 m/s², we can use the equation:
v = a * t
Where v is the final velocity, a is the acceleration, and t is the time. To convert 60.0 mi/h to m/s, we can use the conversion factor 1 mi/h = 0.447 m/s:
60.0 mi/h = 60.0 * 0.447 m/s = 26.82 m/s
So we can solve for t:
t = v / a = 26.82 m/s / 2.35 m/s² = 11.38 s
So it takes the VW Beetle 11.38 s to reach 60.0 mi/h with an acceleration of 2.35 m/s².
b. To find the acceleration of the top-fuel dragster, we can use the equation and the information given:
v = a * t
Where v is the final velocity, a is the acceleration, and t is the time. To convert 60.0 mi/h to m/s, we can use the conversion factor 1 mi/h = 0.447 m/s:
60.0 mi/h = 60.0 * 0.447 m/s = 26.82 m/s
And we know t = 0.700 s. So we can solve for a:
a = v / t = 26.82 m/s / 0.700 s = 38.3 m/s²
So it takes the VW Beetle 11.38 s to reach 60.0 mi/h with an acceleration of 2.35 m/s². So the acceleration of the top-fuel dragster is 38.3 m/s².
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The table shows information about two waves. Based on the given information, which conclusion can be made?
(1 point)
Responses
Wave W has a greater amplitude.
Wave X has a faster speed.
Wave X has a greater amplitude.
Because the information is incomplete, a wave would have a greater amplitude if it has a bigger disturbance when compared to another wave.
What is Amplitude?In physics, amplitude refers to the greatest displacement or distance that a point on a vibrating body or wave can move relative to its equilibrium location. It is equivalent to the vibration path's half-length.
Hence, it can be seen that the wave's energy determines how far the medium's particles go. The amplitude of the wave determines how far the particles travel.
The energy of the disturbance that generates the wave determines the wave's amplitude. Greater amplitude results from a wave produced by a disturbance with more energy.
The general overview should give you a better understanding of waves, amplitudes and speed.
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why was class 6 called moon rocks, what do moon rocks have to do with a module called exposure and risk?
Moon rocks have to do with a module called exposure and risk because even if the substance is hazardous, if we're not exposed, we're not at risk.
The measurement of potential future loss resulting from a certain event or business action is known as risk and exposure, and it can be computed as the probability of the event multiplied by the predicted loss as a result of the risk impact.
Risk analysis includes the estimation of the probability that a specific incident will cause the company to suffer a loss. Therefore, it is crucial for management to comprehend, estimate, and take the appropriate actions to avoid or mitigate that risk.
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I've been stuck on this for a while now, could I get some help?
Let asteroid A have a mass of 7.86 x 1011 kg and asteroid B have a mass of 1.12 x 109 kg. If there is a gravitational attraction of 4.54 x 102 N between them, how far apart are their centers of mass?
A. 1.14 x 10-4 m
B. 1.14 x 104 m
C. 1.29 x 108 m
D. 1.29 x 10-8 m
The distance between the masses is 1.14 x 10⁴ m.
option B.
What is the distance between the masses?The distance between the masses is calculated by applying Newton's law of universal gravitation.
Fg = Gm₁m₂ / R²
where;
G is universal gravitation constantR is the distance between the planetsm₁ is the mass of the first objectm₂ is the mass of the second objectR² = ( Gm₁m₂ ) / ( F )
R = √ [ ( Gm₁m₂ ) / ( F ) ]
R = √ [ ( 6.67 x 10⁻¹¹ x 7.86 x 10¹¹ x 1.12 x 10⁹ ) / ( 4.54 x 10² ) ]
R = 1.14 x 10⁴ m
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A potter’s wheel moves from rest to an angular speed of 0.30 rev/s in 25.0 s.
Assuming constant angular acceleration,
what is its angular acceleration in rad/s^2
?
Answer in units of rad/s^2
The angular acceleration for the potter's wheel is 0.012 rad/s².
How to calculate angular acceleration?The equation for angular velocity with constant angular acceleration is given by:
ωf = ωi + αt
where ωf is the final angular velocity, ωi is the initial angular velocity (which is 0 in this case), α is the angular acceleration, and t is the time.
Plugging in the given values, we have:
0.30 rad/s = 0 + α x 25.0 s
Dividing both sides by 25.0 s, we get:
α = 0.30 rad/s / 25.0 s = 0.012 rad/s²
So the angular acceleration is 0.012 rad/s².
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two rectangular tanks contain air that have a constant temperature and are connected by a single valve. one tank is holding moist air, while the other is holding dry air. once the valve is opened, what is most likely to happen?The two air masses will remain stationary and not mix. The two air masses will mix until an equilibrium is reached The moist air will become even more moist, and the dry air will become even more dry None of the answers are correct
The right response is That dry air will get drier and the moisture will get even more moist.
What are masses in maths?Mass is a physical quantity. This unit of mass measuring is an object's weight. It is measurable in conventional mass units such milligrams, kilograms, and pounds. Although smaller things are measured in grams, the kilogram is the actual SI mass unit.
What is mass in physics with example?The best way to grasp mass is the amount of matter that any item or body is made of. There is mass in everything we are able to see. A table, a chair, your bed, the ball, a cup, or even air are examples of items with mass. Everything is therefore either lighter or heavy.
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An acronym for the Women’s Memorial Fund is _WMF_
Using NBA instead of National Basketball Association is an example of an acronymic sentence.
_FALSE_
"Every good boy does fine" for the notes on a scale
-_Acronymic Sentence-_
“FACE” for the correct order of notes on a musical scale
-_Acronymic abbreviation-_
- “NBA” for the National Basketball Association _"Basic acronym
Acronyms formed from phrases can create - D. All of the above
An acronym can only stand for a single word. FALSE
ROYGBIV is an --- B. Acronymic abbreviation.--
The first step in creating any acronym is to C
"Acronymic Abbreviation" “MVEMJSUN” for the planets closest to the sun
The Foundation's namesake, Dr. Martha Ripley, was an ardent supporter of expert medical treatment for both married and unmarried mothers and their newborns.
What is Women memorial fund?Since its founding in 1957, Ripley's grantmaking has focused on the welfare of women and children. Dr. Ripley was instrumental in starting the Minneapolis Maternity Hospital in 1886 and stayed involved in its issues until her death in 1912.
The facility, which was subsequently given the name Ripley Memorial Hospital, was the first in the city to establish a social services department, provide lessons on parenting and natural delivery, and allow young children to "room in" with their mothers.
The hospital's board decided to form the Ripley Memorial Foundation and donate the proceeds from the sale when it closed in 1956.
Therefore, The Foundation's namesake, Dr. Martha Ripley, was an ardent supporter of expert medical treatment for both married and unmarried mothers and their newborns.
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an athlete swims the length l of a pool in a time t 1and makes the return trip to the starting position in a time t 2. if she is swimming initially in the positive x direction, determine her average velocity for: the second half of swim g
The average velocity for the second half of the swim can be calculated is : v = d / t = l / t2
What is meant by average velocity?Change in position or displacement (∆x) divided by the time intervals (∆t) in which the displacement occurs is called average velocity.
To determine the average velocity of athlete for the second half of the swim, you need to know distance she covered and the time she took to cover it.
The distance covered in the second half of the swim is the length of the pool, l. The time taken for the second half of the swim is t2.
So, the average velocity for the second half of the swim can be calculated as follows:
v = d / t = l / t2
where d is the distance covered, t is the time taken, and v is the average velocity.
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a tuna salad is removed from the cooler at 9:00 a.m. and put out for a buffet at 11:00 a.m. by what time must the tuna salad be served or thrown out?
At 9:00 am, a tuna salad is taken out of the cooler, and at 11:00 am, it is set out for a buffet. The deadline for serving or discarding the tuna salad is 3:00 PM.
When should the tuna salad be thrown out?Tuna salad can be kept in the fridge for three to five days when properly refrigerated. How long can you leave tuna salad out in the open? When left out for longer than two hours at room temperature, tuna salad should be thrown away because bacteria grow quickly between 40 and 140 degrees Fahrenheit.
Can cold food be kept for up to 4 hours without a temperature control?If the following conditions are met, it is OK to store cold food without ceramic heaters for more than four hours. requirements are satisfied Before being taken out of the temperature control, food must be kept at 41 degree Fahrenheit or lower. When the food is first received, label it with the expiration date.
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Devon is applying 100N of force to pull 15kg object, but the object isn’t moving.what does this indicate about the coefficient of friction for the surface?
A) the surface has a low coefficient of friction
B) the surface has a high coefficient of friction
C) you can’t draw a conclusion from the information provided
D) the static coefficient of friction is equal to the appeal force
Answer:
B) the surface has a high coefficient of friction
When an object is not moving despite an applied force, it means that the frictional force is equal to or greater than the applied force. A high coefficient of friction indicates that the frictional force is strong, making it difficult to move the object. In this case, the frictional force is equal to the 100 N of force that Devon is applying, so the coefficient of friction for the surface must be high.