Spacecraft will take around 49 minute and 92 second to coast from perigee to the apogee.
We use Kepler's third law for which the time period is defined as
[tex]T = 2 \pi \sqrt[]{\frac{a^{3} }{GM} }[/tex]
The Prague's altitude is the shortest distance between the earth's surface and satellite.
The average distance of the perigee and apogee of satellite can be defined as
a = R + [tex]\frac{r_{1} +r_{2} }{2}[/tex]
R is the radius of earth (6374.1km)
r1 is the lower orbit. (500km)
r2 is the higher orbit.(900km)
Using the values in above equation we get:
6374.1+ (500+ 900)/2
a = 7078.1 km
Time taken to fly from perigee to apogee equals to the half of the orbital speed so
t = T/2
[tex]t = \pi \sqrt[]{\frac{a^{3} }{GM} }[/tex]
by using the values we get-
= √[(7078.1)³/6.67 ×10⁻¹¹ × 6×10²⁴]
= 295573.94 * 10⁻²
= 2995.73s
t = 49 mint 92 sec
It will take around 49 minute and 92 second to coast from perigee to the apogee.
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A car travels from tuscaloosa to birmingham 1/3 of time at 50.0 km/h and 2/3 of the time at 60.0 km/h. the average speed of this trip is?
The average speed of this trip is 15.72 m/s
Given:
speed = S1 = 50.0 km/h
speed = S2 = 60.0 km/h
time taken to travel with speed S1 = 1/3
time taken to travel with speed S2 = 2/3
To Find:
average speed of this trip
Solution:
distance 1 = speed x time = 50*1000/3600 x 1/3
= 4.62 m
distance 2 = 60*1000/3600 x 2/3 = 11.1 m
Average speed = total distance/total time
= 4.62 + 11.1 / 1 = 15.72 m/s
Hence, average speed is 15.72 m/s
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Astronomers observe a typical star using a telescope and a spectrometer. they will see:_________
Astronomers observe a typical star using a telescope and a spectrometer, and thereby they will see a given absorption spectrum of the celestial body.
What is the absorption spectrum of a star?The absorption spectrum of a given star in space is the light that is emitted by this celestial body in Universe, which can be measured by different technological devices including a spectrophotometer.
In conclusion, astronomers observe a typical star using a telescope and a spectrometer, and thereby they will see a given absorption spectrum of the celestial body.
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For the following processes, state whether each of the thermodynamic quantities q, w, u, and h is greater than, equal to, or less than zero for the system described. explain your answers briefly
A- The system's internal energy is constant since the temperature is constant. 0 deltas
B- the system receives no new or removed heat Q=0
C. Because the system's volume remains constant, it does not perform any work. 0 W=p delta v
An isothermal process in thermodynamics is a type of thermodynamic process where the system's temperature T remains constant: T = 0. A thermodynamic process known as adiabatic means that no heat is transferred into or out of the system. An isochoric process in thermodynamics is one in which the volume of the closed system experiencing the process remains constant. It is also known as a constant-volume process, isovolumetric process, or isometric process.
the complete question is :
For each of the following, which thermodynamic quantities (delta u, q, w) have values equal to zero?
A- an isothermal process
B- an adiabatic process
C- an isovolumetric process
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Name the four most abundant elements in the entire earth. use their full names instead of their symbols.
Answer: Oxygen, silicon, iron and aluminum
Explanation: Oxygen, which composes about 49.5% of the total mass of the Earth’s crust, waters and atmosphere, according to the textbook “Modern Chemistry.” Silicon is second at 28%. Aluminum is a distant third, at only 8%. Compounds of silicon and oxygen make up 87% of the materials in the Earth’s crust.
State the Universal Law Of Gravitation
Answer: Newton's law of universal gravitation is usually stated as that every particle attracts every other particle in the universe with a force that is directly proportional to the product of their masses and inversely proportional to the square of the distance between their centers.
Explanation:
Hope this helps!
Answer:
every particle attracts every other particle in the universe with force directly proportional to the product of the masses and inversely proportional to the square of the distance between them.
Venus is sometimes called:_____.
a. the evening star
b. the early star
c. the late star
The correct option is (a)the evening star.
Venus is sometimes called the evening star.
Briefing :Venus is the final celestial body to withdraw from view at sunrise and the first to appear in the evening sky. It is referred to as the Morning and the Evening star for this reason. Three factors account for Venus's brightness. First of all, it approaches Earth more closely than any other planet. Second, compared to other inner planets, it is very huge, with a diameter that is nearly twice that of Mars and three times that of Mercury. Thirdly, Venus' dense cloud cover entirely scatters much of the light back into space. Venus really reflects more sunlight than any other planet, at 77%. Venus is so brilliant that it may even be seen during the day.Learn more about the venus with the help of the given link:
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Marcus is driving his car at 15 km/h when he brakes suddenly. he comes to a complete stop in 2 seconds. what was his acceleration in km/h/sec? was his acceleration positive, negative, or zero?
When Marcus brakes suddenly and comes to a complete stop in 2 seconds the acceleration in km/h/sec is: -7.5 km/h/sec it is negative because it is decelerating
The formula and procedure we will use to solve this exercise is:
a = (vf - vi) /t
Where:
a = accelerationvf = final velocityvi = initial velocityt = timeInformation about the problem:
vi= 15 km/hvf = 0 km/ht = 2 seca=?Applying the acceleration formula we have:
a = (vf - vi) /t
a = (0 km/h - 15 km/h) /2 sec
a = (-15 km/h) /2 sec
a = -7.5 km/h/sec
Acceleration is negative because it is decelerating
What is acceleration?It is a physical quantity that indicates the variation of velocity as a function of time, it is expressed in units of distance per time squared e.g.: m/sec2 ; km/h2
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The distance from the center of a lens to the point at which light rays converge on the film is known as the ______ of the lens.
The distance from the center of a lens to the point at which light rays converge on the film is known as the focal length of the lens.
In photography, focal length is the distance measured in millimeters (mm) between the optical center of the lens and the camera sensor, where the light information is recorded.
It is important because it dictates the distance your camera will be able to capture. Smaller numbers show more scene and have wider angle while larger numbers show less scene and have tighter angle of view.
What is photography?The process of recording an image on light-sensitive film is known as photography.
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In the article, the study author recommends going on a "photo hunt." What was the purpose of this activity?
In a scavenger hunt, participants compete to collect the greatest number of objects from a predetermined list. As opposed to a scavenger hunt, a treasure hunt entails following a sequence of clues to locate a particular thing or objects.
A sheet containing a list of things will be supplied to each team or person. You have to locate every object and take a picture. Whoever has the most photos at the end of the timer wins. You must always remain as a team if you're participating in it. A spot-the-difference game is Photo Hunt. Players are presented with two identical photographs side by side at each stage, with just five distinctions between them.
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How far does a freely falling apple drop in 7.4 s after being released from rest?
The freely falling apple will travel 268.32 meters along y-axis
We need to know about free fall motion to solve this problem. The free fall motion should follow this rule
vt = gt
vt² = 2gh
h = 1/2 . g . t²
where vt is final velocity, g is the gravitational acceleration (9.8 m/s²), h os height and t is time.
From the question above, we know that
t = 7.4 s
Use the third equation to get the distance (height)
h = 1/2 . g . t²
h = 1/2 . 9.8 . 7.4²
h = 268.32 m
The freely falling apple will travel 268.32 meters along y-axis.
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The idea that light consists of photons, bundles of pure energy, was first proposed by?
Einstein was the first to postulate that light is made up of photons, which are essentially energy bundles.
What a photon is made of?A photon is a microscopic particle made up of electromagnetic radiation waves. Maxwell demonstrated that photons are merely electric fields moving through space. Photons move at the speed of light and have no charge or rest mass. Charged particles produce photons, though they can also be produced by other processes, such as radioactive decay.
It's common to refer to photons as energy packets. This analogy is excellent because a photon has uncondensable energy. An alternating electric field is how this energy is kept in reserve. The universe's size, which is the longest theoretical wavelength of light, and the Planck length, which some theories claim to be the smallest, have never been measured. These energy packets may travel great distances without losing energy or speed. In vacuum, photons move at the speed of light, which is 2.997 x 108 m/s.
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A high-voltage power line is a catenary described by y = 9cosh(x/9) find the ratio of the area under the catenary to its arc length.
The correct answer for the ratio of the area under the catenary to its arc length is 12 : 1 .
y = 12cosh(x/12) Since the анс length from FGN) on the interval [c, d] is Arc length =
Let y' =f'(x) prime = derivative of 12cosh(x/12) for x = Sinh(x/12) .
. A(x) length = ∫√1+ Sinh² (1/2). dx
= int c ^ d sqrt(cosh^2 (alpha/12)) * dx
= integrate d from c to d cosh( x 12 )* dx
=[12. sinh(x/12) ] e ^ d
= 12[sinh(d/12) - sinh(c/12)]
and area under f(x) on the interval [c, d]
Area = ∫ f(x).dx from [c,d ]
= 144[sinh(d/12) - sinh(c/12)]
the area ratio of the area under the catenary to it's length is
= 144[sinh((d)/12) - sinh(c/12))/ 12[sinh( d/ 12 ) -sinh( c /12 )] .
=12
So, ratio is 12:1
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Tabitha walked a distance of 1.80 km in 30 min. Find her average speed.
Formula:
distance traveled divided by time taken.
So 1.80 Divided by 30 = 0.06
Tabitha's average speed = 0.06
All Done!
Glass is an example of a/an _____________.
Answer:
solid
Explanation:
it's not liquid, nor gas, so solid.
A jogger accelerates at a rate of 0.558 m/s2. how fast is this in mi/hr2? __________ m/hr2 note: 5280 ft/mile, 3.28 ft/m (put your answer in scientific notation, you do not need to include units).
The jogger's acceleration is 0.558m/[tex]s^{2}[/tex]. 9.628 in [tex]m/hr^{2}[/tex] is the acceleration of jogger.
What do you mean by acceleration?The rate at which an object's velocity with respect to time varies is referred to as acceleration in mechanics. The vector quantities are the accelerations (in that they have magnitude and direction). An object's acceleration is determined by the direction of the net force exerted on it.
According to Newton's Second Law, an object's acceleration is determined by a combination of two factors: the mass of the object and its mass, depending on the materials from which it is made. The magnitude of an object's acceleration is directly proportional to the net result of all external forces acting on the object.
The acceleration is measured in meters per second squared in the SI system.
For example, when a vehicle starts from standstill (zero velocity, in an inertial frame of reference) and travels in a straight line at increasing speeds, it is accelerating in the direction of travel. If vehicle turns, an acceleration occurs toward the new direction and changes its motion vector.
The acceleration of vehicle in its current direction of motion is called a linear (or tangential during circular motions) acceleration, the reaction to which the passengers on board experience as a force pushing them back into their seats. When changing direction, effecting acceleration is called radial (or centripetal during circular motions) acceleration, the reaction to which the passengers experience as a centrifugal force.
Jogger's acceleration = 0.558m/[tex]s^{2}[/tex]
1 hour= 3600s
acceleration in mi/[tex]hr^{2}[/tex]=( 0.558*3.28*[tex]\frac{1}{5280}[/tex])/ (1*[tex]\frac{1}{3600}[/tex])= 9.628m/hr[tex]^{2}[/tex]
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Consider the reaction, 2 d(g) 3 e(g) f(g) => 2 g(g) h(g) when e is decreasing at 0.36 mol/ls, how quickly is f decreasing? give your answer to 3 decimal places.
The rate at which F is decreasing is 0.12 mol / L s
Given that,
2 D(g) + 3 E(g) + F(g) → 2 G(g) + H(g)
Rate of reaction = - ΔD / 2 Δt = - ΔE / 3 Δt = - ΔF / Δt = ΔG / 2 Δt = ΔH / Δt
Given that,
- ΔE / Δt = 0.36 mol / L s
- ΔE / 3 Δt = - ΔF / Δt
- 0.36 / 3 = - ΔF / Δt
- ΔF / Δt = - 0.12 mol / L s
The rate of reaction is the measure of how quickly or slowly that a reaction proceeds.
Therefore, the rate at which F is decreasing is 0.12 mol / L s
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Electrical insulating gloves marked with a yellow label have a maximum use voltage level of _____ v.
Electrical insulating gloves marked with a yellow label have a maximum use voltage level of 17000 V.
What is an electrical insulator?Electric current cannot readily travel through an electrical. Due to their closely bonded state, the insulator's atoms' electrons are immobile. Electric current can flow through other materials more easily, such as semiconductors and conductors. Insulators have higher resistivities than semiconductors or conductors, which makes them stand out from other materials. Non-metallic are the most typical examples.
Since even insulators contain minute amounts of mobile charges (charge carriers) that can carry current, a perfect insulator does not exist. A sufficiently high voltage is supplied to cause the electric field to pull electrons from atoms, which causes all insulators to turn electrically conductive. An insulator's breakdown voltage is what this is.
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I need help with this ASAP.. please and thank you.. I have to get it done
A resistor carries 0.40 a when connected to a 9.0-v battery. what is theresistance of the resistor?
The resistance of the resistor which carries 0.40 a when connected to a 9.0-v battery is 22.5 ohm
Given:
current of resistor = 0.40 A
voltage of resistor = 9.0 V
To Find:
the resistance of the resistor
Solution: Resistance of a resistor with current I and voltage V is defined as the ability of the element to resist the flow of current through it. It's SI unit is V/A or ohm. Ohms () are used to express resistance values. Electricity will flow from high to low when two terminals have an electron difference. That flow is countered by resistance. The current decreases as resistance increases. Conversely, the higher the current, the lower the resistance.
Voltage = Current x Resistance
Resistance = Voltage/Current
Resistance = 9 V/0.40 A = 22.5 ohm
Hence, the resistance of the resistor is 22.5 ohm
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Determine the half-life of a nuclide that loses 38.0% of its mass in 407 hours. 590 hours 281 hours 291 hours 568 hour 204 hours
The half-life of a nuclide that loses 38.0% of its mass in 407 hours is 737 hrs
Let the initial mass of nuclide is N° = 100
The final mass of nuclide after 407 hours
= 100 - 38 = 62
The expression for decay constant is
λ = 1/t ln(N°/Nt)
Substitute the given values and calculate the decay constant as,
λ = 1/407hr ln(100/62)
λ = 9.4 x 10^-4/hr
Now, the half-life is calculated as,
t1/2 = 0.693/λ
= 0.693/9.4 x 10^-4/hr
t1/2 = 737 hrs
Hence, the half-life of a nuclide is 737 hrs
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The supply curve measures quantity ______ on the horizontal axis and ______ on the vertical axis.
The supply curve measures quantity supplied on the horizontal axis and price on the vertical axis.
What is supply curve?The supply curve illustrates the relationship between the price of an item or service and the volume delivered over a specific time period. In a typical scenario, the amount supplied will be shown on the horizontal axis and the price will be shown on the left vertical axis.Supply curves frequently predict whether the price of a commodity will rise or fall in response to demand, and vice versa.The supply curve for products with greater elastic supply is shallower (near horizontal), whereas the supply curve for products with less elastic supply is steeper (closer to vertical).The two main tenets of the law of supply and demand are the supply curve and the demand curve.Learn more about the supply curve with the help of the given link:
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what properties do all mechanical waves share?
When an electron is released from rest in a uniform electric field, its electric potential energy?
When an electron is released from rest in a uniform electric field, its electric potential energy increases and this happens due to Law of Conservation of Energy.
What is potential energy in electric systems?The power that is required to move a charge in opposition to an electric field is known as electric potential energy.
A charge must be moved through a stronger kind of electric field with more energy, but it also must be moved through a weaker electric field but present with more energy.
When an electron is released from rest in a uniform electric field it accelerates opposite to the direction of field. Thus, according to the Law of conservation of energy, this energy is increased.
In any kind of uniform electric field, a positive charge that has been at rest accelerates in the direction of the electric field. Therefore, because of this and as a result of the law of conservation of energy, K.E. rises while P.E. falls.
Therefore, P.E. of positively charged particles decreases because the force q causes charged particles to move faster in the direction of the field.
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Consider a situation where you exert a force f on a crate of mass m, moving it at a speed v a distance d across a floor in a time interval t. the quantity 1/2 mv2 is:______
The quality (1/2) mv² will be the kinetic energy of the crate .
The kinetic energy of an object is define as , it is a form of energy that an object or a particle has by reason of its motion.
We are know that,
Force exerted on the crate = f
Mass of the crate = m
Speed of motion of the crate =v
Distance traveled by the crate across the floor = d
Time interval passed = t
The motion can be defined as , the change in position of an object with respect to its surroundings in a given interval of time.
Kinetic energy is directly proportional to the mass of the object and to the square of its velocity. If the exert a force f on a crate of mass m, moving it at a speed v a distance d across a floor in a time interval t.
K.E. = 1/2 m v²
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The seafloor spreads in opposite directions as magma forces its way upward. Geologists have observed matching, reversed magnetic bands on both sides of this ridge. Which is the best explanation of these matching, reversed bands?
When the Earth's magnetic field reverses, a new stripe, with the new polarity, begins. Such magnetic patterns led to recognition of the occurrence of sea-floor spreading, and they remain some of the strongest evidence for the theory of plate tectonics.
d. the earth experiences cycles of magnetic poles reversingWhy are the magnetic stripes on the sea floor parallel to and symmetrical across the mid-ocean ridge?The specific magnetism of basalt rock is determined by the Earth's magnetic field when the magma is cooling. Scientists determined that the same process formed the perfectly symmetrical stripes on both side of a mid-ocean ridge. The continual process of seafloor spreading separated the stripes in an orderly pattern
With this information, we can conclude that A polarity reversal means that the magnetic North flips to where we know the South Pole is. At the mid-ocean ridge spreading axis.
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Underground-fault conditions, an effective ground path will carry current from the point of a ground fault to ________.
Under ground fault conditions, an effective ground path will carry current from the point of a ground fault to electrical supply source
The effective ground path is a low impedance electrically conductive path constructed intentionally to carry current under ground fault conditions. It helps remove dangerous voltage from a ground fault and facilitates overcurrent protective device operation.
Ground fault is a type of short-circuit in which the electricity takes an unplanned path to the ground. It is caused by wrong wiring or damaged insulation / appliance.
Therefore, under ground fault conditions, an effective ground path will carry current from the point of a ground fault to electrical supply source
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What is the atomic number for an element whose mass number is 115, which contains 66 neutrons per atom?
The atomic number for an element whose mass number is 115, which contains 66 neutrons per atom is: 49
The formula and procedure we will use to solve this problem is:
number of protons = mass number - number of neutronsatomic number = number of protonsInformation about the problem:
mass number = 115number of neutrons = 66atomic number =?Applying the number of protons formula we get:
number of protons = mass number - number of neutrons
number of protons = 115 - 66
number of protons = 49
Applying the atomic number formula we get:
atomic number =number of protons
atomic number = 49
What is an atom?The atom is the smallest part of the composition of matter, it is indivisible and is composed of a nucleus that has protons and neutrons, and around the nucleus there are the electrons.
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What approach responds to the limitations of the other legacy-measuring methods?
The other-legacy measuring methods' weaknesses are addressed by the bottom-up approach.
An organizational decision-making process known as a "bottom-up approach" begins at the bottom of the hierarchy rather than the top. In actuality, this means that choices won't always be made by the CEO or department head (this is known as a top-down approach).
What distinguishes a bottom-up strategy from a top-down approach?
When choices affecting the entire organization are made, top-down management is used, whereas bottom-up management involves all teams in these types of decisions.The bottom-up approach often focuses its analysis on specific traits and micro features of a single stock. The focus of bottom-up investment is on fundamentals that apply to individual companies or industries.What bottom-up management has to offer:
Promoting cooperation.Enhancing morale. Creating new insights. Enabling your group.To learn more about Bottom-up approach, visit:
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The stars rise about 4 minutes earlier each night. if the star betelgeuse, of the constellation orion, rises tonight at 1:12 am, you would expect it to rise 22 days from now at the time of?
22 days from now the star Betelgeuse, of the constellation Orion will rise at 11:40 pm
Given that,
Time at which the star rises today = 1:12 am
The stars rise about 4 minutes earlier each night
Minutes earlier it will rise 22 days from now = 4 * 22 = 88 minutes
= 1 Hr 28 Min
The star should rise 1 Hr 28 Min earlier from 1:12 am which is 11:44 pm
But since the time from today to 22 days from now crosses the 12 am mark, the star will be seen twice on the same day. This means that the star seen on 11:44 pm is actually on the 21st day. On 22nd day the star is seen 4 minutes earlier than 11 pm which is 11:40 pm.
We rotate one degree every 4 minutes. We revolve a little more than 1 degree every day around the sun (365 days divided by 360 degrees is 1.014 degrees). So everyday we get to see the star 4 minutes early which is 1 degree.
Therefore, 22 days from now the star Betelgeuse, of the constellation Orion will rise at 11:40 pm
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A train slows down as it pulls into a station. if the train is moving from your left to your right, what are the directions of the vectors for velocity and acceleration?
The directions of the vectors for velocity and acceleration are in the opposite directions.
The velocity vector is always in the direction of motion of the object. So, the direction of velocity is in the right from our point of view.When there is a positive acceleration in the object the acceleration vector is in the direction of motion of the object. When there is a negative acceleration in the object the acceleration vector is in the opposite direction of motion of the object. So, the direction of velocity is in the left from our point of view.Velocity vector is the rate of change of position of an object. Acceleration vector is the rate of change of velocity of an object.
Therefore, the directions of the vectors for velocity and acceleration are in the opposite directions.
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