The magnitude of this vector:
18.4 mi-28.7 mj is 34.09m
Given:
vector is
18.4 mi-28.7 mj
Magnitude =[tex]\sqrt{18.4^2+28.7^2}=34.09[/tex]
This magnitude of a vector formula summarizes the distinct vector measures along the x-axis, y-axis, and z-axis. It is represented by the symbol |v|. A vector's magnitude is either a positive number or zero, and it can never be negative. Let us finally understand the magnitude of a vector formula by considering a few solved cases.
A vector's magnitude is equal to its length. The magnitude of the vector an is indicated by the symbol a. For further information on vector magnitude, see the introduction to vectors.
This article deduces formulas for the magnitude of vectors in two and three dimensions in terms of their coordinates. The magnitude formula for a two-dimensional vector a=(a1,a2)
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Answer:
34.09178
Explanation:
This is the correct answer for Acellus
A ball is thrown upward with a velocity of 19.6. what us its veloicty after 3 sec
Initial velocity exists at 19.6 m per second. Plus acceleration exists equivalent to expression due to gravity, but it exists downward, so it will be negative -9.8 m per second squared and time exists three seconds, so this exists equivalent to this gives us - 9.8 meter per second velocity after 3 seconds.
How to find the initial velocity?The acceleration of the ball will be a constant [tex]$9.8 \frac{\mathrm{m}}{\mathrm{s}^2}$[/tex] (downward), regardless of whether the ball exists traveling upward or downward.
The equation that makes this calculation simplest is
[tex]$$V_f=V_i-g(\Delta t)$$[/tex]
where the negative sign has been used to account for the opposite directions of [tex]$V_i$[/tex] and g. After 3 seconds,
[tex]$V_f=19.6-(9.8)(3)=19.6-29.4=-9.8 \frac{m}{s}$$[/tex]
The negative result tells us that the ball is on its way downward by this time (consistent with our choice of a negative value for the downward acceleration of gravity).
Initial velocity exists at 19.6 m per second. Plus acceleration exists equivalent to expression due to gravity, but it exists downward, so it will be negative -9.8 m per second squared and time exists three seconds, so this exists equivalent to this gives us - 9.8 meter per second velocity after 3 seconds.
The complete question is:
A ball is thrown upward at a velocity of 19.6 m/s. What is its velocity after 3.0 s, assuming negligible air resistance?
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Based on einstein's theory of gravity, if the sun and its mass were suddenly to disappear, earth would:________
Based on Einstein's theory of gravity, if the sun and its mass were to suddenly disappear, earth would stay in its current orbit for a few minutes before taking off into space.
What would occur to our world if the sun were to suddenly vanish?
The Earth would be drawn to a new center of gravity if the sun disappeared. Earth's gravity would change, as would that of the rest of the solar system, and Earth would begin to drift into space since there would no longer be a steady source of energy from the sun. It is a foolish dream to think that life could exist without the sun forever. Humans could be able to survive for a while in some sort of base, such as a nuclear-powered dome.
The good news is that there wouldn't be many living things for the radioactive waste to endanger; however, there also probably wouldn't be any liquid water to cool the power system. All photosynthetic species, including plants and algae, would die if just the sun's light persisted.
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Best answer will be mark Brainliest!
Do you feel that Mendeleev should receive the main credit for the structure of today’s periodic table? Defend your position in a paragraph
Answer:
Mendeleev is generally given more credit than Meyer because his table was published first, and because of several key insights that he made regarding the table.
Explanation:
Calculate the majority and minority carrier concentration in silicon at t=300k. if (a) na = 1018 cm-3 (b) nd = 5*1016 cm-3
Majority carries electron concentration n₀=225 cm⁻³
Briefing:At= 300k ni= 1.5×10¹⁶ cm⁻³
Given na= 10¹⁸ cm⁻³
as Na>>ni the hole concentration is,
P₀= Na= 10¹⁸ cm⁻³
Therefore majority carries of the hole concentration is
P°= 10¹⁸ cm⁻³
At equilibrium,
P₀n₀= ni²
n₀= ni²/P₀= (1.5×10¹⁰)²/10¹⁸= 225×cm⁻³
n₀= 225 cm⁻³
Majority carries electron concentration n₀=225 cm⁻³.
Definition of concentration:All that noise is interfering with my focus since concentration is defined as the act or process of concentrating as well as the state of being concentrate a focus within a major or a major itself The student decided to concentrate in law.
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Write a short summary of each step
Answer:
I need help ASAP to with this question
Explanation:
Please hurry up with assignment
Describe a situation in which you can accelerate even though your speed doesn’t change.
Uniform circular motion is an example of this question.
Uniform motion in a circular path defines a uniform circular motion.For a circular motion, the essential condition to be fulfilled is having a centripetal force directed towards the centre of the locus.If not that kind of motion defines a uniform linear motion.According to Newton's second law, when there is a net force there exists an acceleration in the direction of the net force.This acceleration in a circular motion is called the "centripetal acceleration".Since the motion is uniform, its speed remains constant having only the direction of the instantaneous speed changing.Therefore, in that type of motion, there is the situation of no speed change with acceleration.
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What is measured in this spectroscopic method?
the vibrational frequency of a bond the frequency that causes a nucleus to flip its spin the absorption of light energy over a specified wavelength range
The vibrational frequency of a bond is measured in this spectroscopic method
What is spectroscopic method ?To investigate the molecule level interaction, spectroscopic methods are used. In this regard, nuclear magnetic resonance is one method (NMR). NMR is utilised to analyse the interaction between mucus and polymers, and carbon and/or proton NMR can also elaborate this interaction.
Atomic absorption spectroscopy (AAS), atomic emission spectroscopy (AES), and atomic fluorescence spectroscopy are the three basic forms of atomic spectroscopy (AFS).The structure of atoms and molecules can be studied using spectroscopy. These systems emit a wide range of wavelengths, allowing researchers to examine their structures in great detail—including the configurations of the electrons in their ground and multiple excited states.Learn more about Spectrocopic method here:
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A 0.5kg baseball experiences a 10n force for a duration of 0.1s. what is the change in?
The change in velocity is 2m/s
Given ,
mass of baseball m = 0.5kg
force on baseball F = 10 N
Duration .i.e. time t = 0.1s
To find here change in velocity =?
Solution,
The impulse(J) of an object is equal to,
J = F× T
Where J is the impulse of the baseball and F is force on baseball at time t.
The impulse is equal to the change in momentum of the baseball and its unit is (N.s) Newton -second. it is a vector quantity therefore the dimension is [LMT⁻¹]. Then the impulse j is given as ,
J = m(v-u)
Here J is impulse ,m is mass, (v-u) is change in velocity .From equating the both impulse equations then can be write as,
m(v-u) = F× t
(v -u) =( F × t)/m
(v -u) = (10N× 0.1 s)/0.5k
(v -u) = 2m/s
Hence the change in velocity (v -u) of baseball is 2m/s.
A 0.5kg baseball experiences a 10n force for a duration of 0.1s. what is the change in velocity of the baseball ?To know more about impulse
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What volume of pure oxygen gas (o2) measured at 546 k and 1.00 atm is formed by complete dissociation of 0.5 mol of ag2o?
The unifying relationship among the variables temperature, volume, pressure, and the number of moles is described and summarized by the ideal gas law.
The equation for ideal gas law is given below where T is temperature, V is the volume, P is the pressure, n is the number of moles of the gas, and R is the gas constant 0.082056 L⋅atm/mol⋅K
PV = nRT
Calculate first the moles of O2 from the moles of Ag2O
moles O2 = 0.5 moles Ag2O x 1 mol O2/2 mol Ag2O = 0.25 moles
Assuming that the oxygen gas is an ideal gas, we will use the ideal gas equation to calculate the volume it occupies.
V = nRT/P
V = 0.25 moles*0.082056*546k/1 atm =
11 L
Hence, volume of pure oxygen gas (o2) is 11 L
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The wire loops in a simple dc motor are wound around an iron core called an armature. constant rotation of the armature provides ________ to operate mechanical devices.
Mechanical power is being provided for constant rotation of the armature in operating mechanical devices.
The armature has two functions. The first is to transport current across the field, resulting in shaft torque in a rotating machine or force in a linear machine. The second function is to create electromotive force (EMF).
The relative motion of the armature and the field produces an electromotive force in the armature. When employed as a motor, the EMF opposes the armature current, and the armature transforms electrical power to mechanical power in the form of torque and transfers it via the shaft. The armature EMF drives the armature current, and the shaft movement is converted to electrical power when the machine is utilized as a generator.
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Need the answer badddd without this app I’d be screwed
Answer:
B
Explanation:
The first modern personality test was the Woodworth Personal Data Sheet, which was first used in 1919. It was designed to help the United States Army screen out recruits who might be susceptible to shell shock.
so, B is correct
Answer:
The answer is B, I hope this helps.
Someone standing at the edge of a cliff throws one ball straight up and another ball straight down at the same initial speed. Neglecting air resistance, which ball has the greatest final velocity upon reaching the ground?.
Both balls have the same velocity upon reaching the ground.
Each ball is given some kinetic energy at the edge of the cliff that takes one upwards and the other down.Since the launching height is the same for both balls each one possesses some potential energy measured relative to the ground down there.Since the air resistance is neglected there would be no resistive forces acting upon each ball that could draw away some of the energy each ball has and therefore, the mechanical energy of each ball is conserved throughout the flight.So, if one writes the energy equation from the edge of the cliff to the ground, it would yield the following result.[tex]\begin{aligned}\\\small K.E +P.E &=\small K.E_1 +P.E_1\\\\\small \frac{mv^2}{2}+mgh&=\small \frac{mV^2}{2}+0\\\\\small V&=\small \sqrt{v^2+2gh}\end{aligned}[/tex]
The magnitude of the final velocity does not depend on the mass of the ball.Therefore, both balls would have the same velocity at the ground as they are given the same initial speed at the same initial height.#SPJ4
When describing motion, what is a frame of reference? (1 point)
O Any numerical measurement of the motion.
O The point of origin of the motion
OA system of reference points used to determine position and velocities of objects.
O An x-y grid with yourself at the origin.
C. When describing motion, a frame of reference is a system of reference points used to determine position and velocities of objects.
What is frame of reference?A frame of reference is an arbitrary set of axes with reference to which the position or motion of something is described or physical laws are formulated.
What is the importance of frame of reference?Frame of reference serves a valuable purpose, because it enables us to make more accurate measurement of our position, displacement, velocity and the total distance traveled.
Also, a frame of reference consists of an abstract coordinate system and the set of physical reference points that uniquely fix the coordinate system and take measurements within that frame.
In other words, it is a system or base, on which motion of an object is determined.
Thus, when describing motion, a frame of reference is a system of reference points used to determine position and velocities of objects.
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The electric field at point p due to a point charge q a distance r away from p has magnitude e. in order to double the magnitude of the field at p, you could:__________
You could double the charge to 2Q in order to double the size of the field at P.
What is the definition of the electric field and its formula?Each location in space where a charge exists in any form can be considered to have an electric field attached to it. The electric force per unit charge is another name for an electric field. The electric field's equation is given as E = F / Q.The magnitude of the electric field is equivalent to the newtons per coulomb at that location in space. The electric field can be calculated as the force per charge, or, put another way, the electric force is equal to the charge multiplied by the electric field at that location in space.
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if tou were to become a scientist what will be your contribution to the society? why?
Observations and inferences are important in science. How would you explain the difference between these two words?
Answer:
The difference between observations and inferences is observations uses one or more of your five senses to know or determine something. However, inferences are where you make an explanation for the observation. For example, you see steam rising off a coffee cup ( this is an observation). The coffee is hot ( this is an inference).
Which element, inductor or capacitor, releases its stored energy before it is removed from the circuit?
Inductor releases its stored energy before it is removed from the circuit.
What is an inductor?A passive two-terminal electrical device known as an inductor, also known as a coil, choke, or reactor, stores energy in a magnetic field as electric current passes through it. Typically, an inductor is made out of insulated wire twisted into a coil. According to Faraday's law of induction, the time-varying magnetic field generates an electromotive force (e.m.f.) (voltage) in the conductor as the current through the coil varies. Lenz's law states that the induced voltage has an opposing polarity (direction) to the change in current that caused it. Inductors so reject any changes in the current flowing through them.Inductance, which is the ratio of voltage to current change rate, is a property of inductors.To know more about inductors, refer:
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A ball is thrown upward from the ground with a speed of 40 m/s. approximately how much time does it take for the ball to reach its highest point?
The ball to reach its highest point at time t =4.0816 sec
Given ,
A ball throw in upward from the ground ,its Initial velocity u = 40 m/s
The time taken by the ball to reach at its highest point t= ?
Solution,
Therefore from equation of motion ,
v = u + gt
where,
v = final velocity
u = initial velocity
g = acceleration due to gravity
t = time
Here final velocity of ball is (0).& taking (g) is negative due to upward direction ,then calculated value of ( t )is given as,
(0) = 40 m/s- (9.8m/s²) t
(t) = 40/9.8 sec
(t) =4.0816 sec
Hence, the ball to reach its highest point at time t is 4.0816 sec
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An extensible wire that obeys looks low it stands by 5.00 mm when it's elastic potential energy is 50j. calculate the value for force constant of the wire
By using Hooke's Law, the force constant is 4 x 10⁶ N/m.
We need to know about Hooke's Law to solve this problem. Hooke's Law describes the force applied to spring (elastic materials) will proportional to spring constant and displacement under the elastic condition. It can be described as
F = k . x
where F is force, k is spring constant and x is displacement.
The potential energy of spring can be determined as
PE = 1/2 . k . x²
where PE is potential energy
From the question above, we know that
x = 5 mm = 0.005 m
PE = 50 joule
By substituting the given parameter, we can calculate the force constant of the wire
PE = 1/2 . k . x²
50 = 1/2 . k . (0.005)²
k = 4 x 10⁶ N/m
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A ball is thrown directly downward with an initial speed of 7.40 m/s from a height of 30.8 m. after what time interval does it strike the ground?
The time interval in fall motion is 1.86 seconds.
We need to know about fall motion to solve this problem. Gravity has a big role in fall motion. It can be described as
vt = vo + g . t
vt² = vo² + 2 . g . h
h = vo . t + 1/2 . g . t²
where vo is initial speed, vt is final speed, g is the gravitational acceleration (9.8 m/s²), h is height and t is time.
From the question above, we know that:
h = 30.8
vo = 7.4 m/s
Find the final velocity
vt² = vo² + 2 . g . h
vt² = 7.4² + 2 . 9.8 . 30.8
vt² = 54.76 + 603.68
vt² = 658.44
vt = 25.66 m/s
Find the time interval
vt = vo + g . t
25.66 = 7.4 + 9.8t
9.8t = 18.26
t = 1.86 seconds
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16. How many coulombs of charge pass through a lamp in 1. 2 min if the current is constant at 250 ma?
According to the current, the charge is 18 coulombs.
We need to know about current to solve this problem. Current can be defined as the flowrate of charge through the medium. It can be determined as
I = Q / t
where I is current, Q is charge and t is time.
From the question above, we know that
I = 250 mA = 0.25 A
t = 1.2 min = 72 seconds
By substituting the given parameters, we can calculate the charge
I = Q / t
0.25 = Q / 72
Q = 18 coulombs
Hence, the charge is 18 coulombs.
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a car traveling forward +30m/s had its brakes applied and stops in 3.0s. what id the car's acceleration?
The car slows down by acceleration - 10 m/s² before stopping.
Equation :Given data are:
Initially moving at 30 m/s
The car's final speed is 0 m/s as it comes to a halt.
t = 3.0 seconds.
Acceleration equals a.
using the equation v = u + at, we obtain
0 = 30 + 3t
a = - 10 m/s²
The vehicle suffers a - 10 m/s² slowdown as a result.
What is meant by acceleration?Acceleration is the general term for any process where the velocity changes. There are only two ways to accelerate: either by increasing speed or decreasing direction, or both. The reason for this is that velocity includes both a speed and a direction.
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According to the given statement the car slows down by acceleration - 10 m/s² before stopping.
What is meant by acceleration?Any procedure where the velocity varies is referred to as acceleration. There are only two ways to accelerate: either by accelerating faster, or by accelerating in the opposite direction. This is because velocity consists of both a speed and a direction.
Briefing:v = initial velocity (20m/s)
u = final velocity (0 m/s)
t = 3.0 seconds.
Acceleration equals a.
Using the equation v = u + at, we obtain
30 = 0 + at
a = - 10 m/s²
The car's acceleration is -10m/s².
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Find the magnitude of the resultant force and the angle it makes with the positive x-axis. (let |a| = 22 lb and |b| = 16 lb. round your answers to one decimal place.)
Given,
The magnitude of the resultant force is 39.7 N and makes an angle of 49.5° with the x-axis.
The two given forces are vectors, thus they have to be resolved horizontally and vertically to determine their resultant.
So that:
Horizontal component = F Cos θ
Vertical component = F Sin θ
Thus, given that: a = 28 lb at 45° on x & y axis, and b = 12 lb at 30° below x-axis.
i. Resolving the vector horizontally, we have:
horizontal component = 28 Cos 45° + 12 Cos 30°
= 19.80 + 10.39
horizontal component, x = 30.19
ii. Resolving the vectors vertically, we have:
vertical component = 28 Sin 45° + 12 Sin 30°
= 19.80 + 6.0
vertical component, y = 25.80
a. Magnitude of the resultant force, |R| = [tex]\sqrt{x^{2} + y^{2} }[/tex]
= [tex]\sqrt{(30.19)^{2} +(25.80)^{2} }\\\\[/tex]
= 39.7124
|R| = 39.7 Newtons
b. The angle that the resultant makes with the positive x-axis can be determined by:
[tex]Tan\ \theta = \frac{x}{y} \\\\\theta = Tan^{-1} \frac{30.19}{25.80} \\\\= 49.4832\\\\\theta = 49.5\textdegree[/tex]
Therefore, the magnitude of the resultant force is 39.7 N and makes an angle with the x-axis.
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Any substance or mixture of substances intended for the cure, mitigation, diagnosis, or prevention of disease is a(n) ____
Any substance or mixture of substances intended for the cure, mitigation, diagnosis, or prevention of disease is a drug.
What is diagnosis?The process of determining which disease or condition is to blame for a person's symptoms and signs is known as medical diagnosis. The term "diagnostic" is most frequently used, with the implied reference to medicine. The history and physical examination of the patient who is seeking medical attention often yield the data needed for diagnosis. The process frequently includes one or more diagnostic procedures as well, such doing medical testing. Posthumous diagnosis is occasionally seen as a type of medical diagnosis.
Due to the vague nature of many symptoms and indicators, diagnosis is frequently difficult. For instance, skin redness (erythema), when present alone, is a symptom of numerous illnesses and cannot be used to diagnose a patient's condition.
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If the force of gravity exerted on the sun by the earth is the same as the force exerted by the earth on the sun, why does the earth orbit the sun, and not the other way around?
The gravitational pull accelerates the Earth more since it is less heavy and causes it to move more quickly.
What are the three realities of gravity ?The mass of the Earth is what creates gravity. The combined gravitational force of all of its mass acts on the mass in your body. We couldn't survive without gravity. It produces the force that keeps the Earth in orbit around the Sun and keeps us on the surface of the planet. When two objects contact, forces are the mechanism by which energy is transmitted from one to the other, but forces do not themselves contain energy. Since gravity is a force, it only offers one method for objects to exchange energy and change its state.
The weakest force that humans are aware of is gravity.
Weight and gravity are not the same.
Gravity generates waves that move at light speed.
Gravitons, which are massless particles, may carry gravity.
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Sound that starts at its source, then bounces off walls, the ceiling and objects within a room before acting on a microphone or an eardrum is known as:_________
Reflection is the process by which sound leaves its source and travels through a room's objects, walls, and ceiling before reaching a microphone or an eardrum.
What do you mean by ceiling?The room's internal overhead lining The ceiling is very high. material used to cover a room's roof or walls. something akin to a towering canopy, an overhanging shelter, or a starry sky. Using a system of timber joists and beams that span the ceiling's length and width.
What is the function of the ceiling?Ceilings assist in enclosing and dividing spaces, controlling the diffusion of light and sound inside a space, and preventing the transfer of sound across spaces.
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How many 1/4 cups are in a cup
Answer:
4
Explanation:
if there are 1/4 cups and you need to fill a cup, you need 4
4 x 1/4 = 4/1
4/1 = 1
If two angles of a triangle have radian measures 9 and 3 8 , find the radian measure of the third angle.
The third angle of the triangle should be 37π/72 rad.
We need to know about the triangle rule to solve this problem. One of the rules of the triangle is the total angle inside the triangle is 180⁰.
A + B + C = 180⁰
From the question above, the given parameter is
A = π/9 rad
B = 3π/8 rad
Convert the angle to radian
180⁰ = π
Hence, the total angle should be
A + B + C = π
π/9 + 3π/8 + C = π
C = π - (π/9 + 3π/8)
C = π - 35π/72
C = 37π/72 rad
Hence, the third angle of the triangle should be 37π/72 rad
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Measuring human proportions on skeletal remains from ancient sites as well as among modern human populations is known as:_________
Measuring human proportions on skeletal remains from ancient sites as well as among modern human populations is known as: anthropometry
The anthropometry is the part of science that studies the proportions of the human body, using non-invasive methods such as the measurement of body mass, height and width.
By using anthropometry it is possible to assess the size, proportions and composition of the human body which gives a measure that reflects the nutritional state of health and allows predicting the performance, health and survival of the individual under analysis.
What is body mass?It is the amount of mass associated with a person's body
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When leak channels are present, why does a capacitive current flow in the reverse direction after the stimulus current has ended?
Capacitor always needs a resistive path to charge or discharge.
Suppose the capacitor is charging through the path R1 and its current flow direction is also shown as per the figure.
Now suppose fully charged capacitor is disconnected from the circuit, hence there will be no current flow out from the capacitor.
But practically ideal capacitors do not exist, there must have some leakage paths suppose R2 and i2.
Therefore, we can see that i1 was entering to C but i2 was leaving C. Hence Capacitive current flow is in reverse direction.
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