Answer:
In any collision (crash) the momentum
is ALWAYS constant
In any collision (crash) the momentum is always constant, whether it is an elastic collision or an inelastic collision the momentum before and after the collision is conserved
What is elastic collision?It is the type of collision in which the total momentum, as well as the kinetic energy of the system, is conserved.
The momentum is always preserved before and after any collision (crash), regardless of whether it is an elastic collision or an inelastic collision.
In the inelastic collision, the momentum is conserved but the kinetic energy of the quantity is not conserved.
The momentum of a quantity is preserved regardless of the type of collision, whether it be an elastic collision or an inelastic collision; the momentum of the quantity will always be conserved.
Hence, The momentum is always preserved before and after any collision (crash), regardless of whether it is an elastic collision or an inelastic collision.
Learn more about the collision from here
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A 1000 kg racecar, which is capable of a top speed of 125 m/s, is sitting in a
parking lot. How much KE does it have?
Camera lenses are described in terms of
their focal length. A 50 mm lens has a focal
length of 50 mm. A camera is focused on an
object 13 m away using a 120 mm lens.
Locate the position of the image.
Answer in units of mm.
Answer:
The position of the image from the camera lens is approximately 121.1 mm
Explanation:
The given parameters of the lens are;
The specification of the camera lens = 120 mm
Therefore, the focal length of the camera lens, f = 120 mm = 0.12 m
The distance of the object from the camera, [tex]d_o[/tex] = 13 m
The lens equation for finding the position of the image is given as follows;
[tex]\dfrac{1}{f} = \dfrac{1}{d_o} + \dfrac{1}{d_i}[/tex]
Where;
[tex]d_i[/tex] = The position of the image from the camera lens
Therefore, by plugging in the known values, we have;
[tex]\dfrac{1}{13} = \dfrac{1}{0.12} + \dfrac{1}{d_i}[/tex]
[tex]\dfrac{1}{d_i} = \dfrac{1}{0.12} - \dfrac{1}{13} = \dfrac{13 - 0.12}{0.12 \times 13} = \dfrac{12.88}{1.56} = \dfrac{322}{39}[/tex]
[tex]\therefore d_i = \dfrac{39}{322} \approx 0.1211[/tex]
The position of the image from the camera lens, [tex]d_i[/tex] = 0.1211 m = 121.1 mm
2. A car with mass 2,500 kg is travelling at 15 m/s. What is the car's kinetic energy?
a. 37,500 J
b. 563,000 J
c. 280,000 J
d. 350,000 J
Answer:
c, 280,000J
Explanation:
You should use the equation KE (Kinetic Energy) = [tex]\frac{1}{2} mv^2[/tex]
m = 2500
v = 15
KE = [tex]\frac{1}{2} * 2500 * (15)^2\\[/tex]
KE = 281250 Joules.
This is consistent with the answer B, as all of the parameters given to you are rounded to 2 significant figures so naturally, the answer should also be rounded to 2 sig figs.
KE = 280,000 J
earth's magnetic compass and its effect on birds?
Please help.
Lions used to hunt by themselves. Now, they hunt in packs. What type of adaptation is this?
A.structural adaptation
B.behavioral adaptation
C. functional adaptation
Answer:
I think it is behavioral
A(n) _______ is a line in which waves move that are moving together all in the same phase
Light wave
Wave front
Incident beam
Dark wave
Answer:
wave front
Explanation:
wave front is an imaginary line of a wave that joins all adjacent points that are in phase,
so that's the definition, and you apply it to the question
it obviously can't be the rest
hope you get it
please mark it brainliest
Answer:
B Wave front
Explanation:
EDG 21
Q3. Recall the equation that links gravitational field
strength, mass and weight
Absolute Zero is when energy / molecules stop moving.
Answer:
yes
Explanation:
When all of the molecules (or atoms) in a system stop moving completely, that's as cold as they can get
PLS HELP I NEED THIS BY TONIGHT PLS
Answer:
GET GOOD
Explanation:
What is the net force acting on a 5.0 kg object that has a velocity of 15 m/s and is moving in a
circle of radius 1.6m?
The net force acting on the object is 703.125 N
In the case of circular motion, there is a centripetal acceleration acting on the object given by:
[tex]a_{r}=\frac{v^{2} }{r}[/tex]
where, v is the velocity of the object = 15 m/s,
and r is the radius of the path = 1.6 m
The net force F:
[tex]F=ma_{r}=m\frac{v^{2} }{r}[/tex]
[tex]F=5*\frac{15^{2} }{1.6}\\F=703.125 N[/tex] is the net force acting on the object.
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A sumo wrestler pushes another sumo wrestler back 3.41 meters, with a force of 120 N. How much work did he do? Round your answer to 2 decimal places.
Answer:
work=force* distance
Explanation:
cal it your self
Need help ASAP
Thanks + BRAINLIST only for correct answer
1.Cell phones convert sound waves into______waves.
-light waves
-sound waves
-radio waves
2.Electromagnetic waves used in cell phone communications are called?
-microwave
-radio wave
-infrared
-all of the above
3.To send out a radio signal far and wide...it is called?
-broadcast
-casting
-antenna
Answer:
cell pohnes convert sound waves into radio waves
electromagnetic waves used in cellphone communications are called: radio waves
To send out a radio signal far and wide.. it is called: broadcast
Explanation:
Answer:
1.radio wave
2. radio wave
3.broadcasting
An electromagnetic wave transfers energy as it travels. During this process, what is the relationship between the magnetic and electric fields along its path?
Answer: A I just got it wrong because of the other person.
Explanation:
The electromagnetic waves are those waves that move through space and carry electromagnetic radiant energy. They include radio waves and microwaves. and many more.
During the transfer of energy, they are the sinusoidal fashion of movement that they are perpendicular to each other in the direction of wave motion. Show synchronized oscillations.Hence the option A is correct.
Learn more about the wave transfers energy as it travels.
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A satellite moves in a circular orbit at a constant speed v0 around Earth at a distance R from its center. The force exerted on the satellite is F0. An identical satellite orbits Earth at a distance of 3R from the center of the Earth. How does the tangential speed, vT, of the satellite at distance 3R compare to the speed v0 of the satellite at R
Tangential speed vT, for the stallite that orbits the earth from a distance 3R is compared by [tex]\bold {(vT)= \dfrac {(v0)}{3}}[/tex].
Given here,
Vo - Speed
R - Distance of center of the earth
Fo - Force exerted on satellite
vT - Tangential speed
For satelite, Gravitational force (Fg)is equal to the centripetal force(Fc),
Fg = Fc = Fo
[tex]\bold {\dfrac {GMm}{R^2} = \dfrac {m(v0)^2}R}[/tex]
GM = (v0)²R..................... (1)
Since, For satellite R = 3R
Thus,
[tex]\bold {\dfrac {GMm}{3R^2} = \dfrac {m(v0)^2}{3R}}[/tex]
[tex]\bold {\dfrac {GMm}{3R^2} = \dfrac {m(vT)^2}{3R}}\\\\\bold {\dfrac {GM}{27 R} = \dfrac {(vT)^2}{3R}}\\\\\bold {GM = \dfrac {27 R \times (vT)^2}{3R}}\\\\\bold {{GM}= 9 R \times (vT)^2}\\[/tex].........(2)
From equation 1 and 2,
(v0)²R = 9(vT)²R
Divide through R and then 9, we get
[tex]\bold {(vT)^2 = \dfrac {(v0)^2}{9}}[/tex]
Take the square root,
[tex]\bold {(vT)= \dfrac {(v0)}{3}}[/tex]
Therefore, tangential speed, vT, for the stallite that orbits the earth from a distance 3R is compared by [tex]\bold {(vT)= \dfrac {(v0)}{3}}[/tex].
To know more about tangential speed,
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Waves that do not need a medium to transfer energy are called
A. Transverse Waves
B. Mechanical Waves
C.Electromagnetic Waves
D.Longitudinal Waves
(help for science Test)
Question 1 of 10
Whích three factors are used to calculate gravitational potential energy?
A. The height of an object
B. The chemical formula for an object
O C. The density of an object
O D. The acceleration of an object due to gravity
O E. The mass of an object
F. The velocity of an object
Answer:
A., D., and E.
Explanation:
Gravitational potential energy is mgh, the values represented by answers E., D., and E., respectively.
Have a wonderful day!
Answer:
Im late. A D and E
Explanation:
The factors that affect an object's gravitational potential energy are its height relative to some reference point, its mass, and the strength of the gravitational field it is in. The formula for potential energy depends on the force acting on the two objects. For the gravitational force the formula is P.E. = mgh, where m is the mass in kilograms, g is the acceleration due to gravity (9.8 m / s2 at the surface of the earth) and h is the height in meters.
PLS ANSWER FAST WILL GIVE BRAINLSET!!!
Calculate the missing variables using the necessary formula and rules using "FORCE"
A tractor carrying hay bales a total mass of 9 100 kg. What force is required to reach acceleration of 4 m/ s2
Answer:Hey I just wanted to tell you that Jesus LOVES YOU SO MUCH He died on the cross for all your sins so you won’t have to suffer the consequences of your sin He paid for ALL OF IT! He loves you SO FREAKING MUCH like unconditionally... all you have to do is confess with your mouth and believe in your heart that Jesus is Lord and God raised Him from the dead 3 days later you will be saved ;)))))))) He wants an intimate relationship with you all you have to do is reach out to Him I love you AND ABOVE ALL JESUS LOVES YOU
Have a blessed day;))
Explanation:
a sound wave has a frequency of 1192 hertz. all sound waves in air travel at 322m/s. find the wave length of the sound wave
Answer:
0.167 m
Explanation:
By the definition of the velocity if a wave ,
The velocity of light, v, is the product of its wavelength, λ , and its frequency, f.
V= fλ
frequency - number of occurrences in a unit time
Wavelength - distance between corresponding points of two consecutive waves
(check the graph for wavelength)
what is kinetic energy
Answer:
Kinetic energy is the movement of objects based on their mass and motion
Explanation:
A form of energy that an object or a particle has by reason of its motion. kinectic energy is a property of a moving object or particle and depends not only on its motion but also on its mass
A crane lifts an air conditioner to the top of a building. If the building is 12 m high, and the air conditioner has a mass of 200 kg, how much work did the crane do to lift it? (Hint: the force the crane exerts is equal to the weight of the air conditioner)
Work needed = 23,520 J
Further explanationGiven
height = 12 m
mass = 200 kg
Required
work needed by the crane
Solution
Work is the transfer of energy caused by the force acting on a moving object
Work is the product of force with the displacement of objects.
Can be formulated
W = F x d
W = Work, J, Nm
F = Force, N
d = distance, m
F = m x g
Input the value :
W = mgd
W = 200 kg x 9.8 m/s²x12 m
W = 23520 J
A piece of equipment belonging to an astronaut has a mass of 2 kg on the surface of the Moon. What is its weight on the Moon?
Answer:
brainliest plss
Explanation:
you will find the question in the pic
Answer:
8cm/sec
Explanation:
Number of cycle per second. Distance covered is 8cm in one cycle.
An object that is speeding up is accelerating.
True
False
Hari drag a load of 60 kg along a distance of 12 metre what amount of work does he do also mention the type of work
Answer:
W = 7056 J
Explanation:
Given that,
Mass of a load, m = 60 kg
Distance moved, d = 12 m
We need to find the amount of work. The work done by an object is given by :
W = Fd
So,
W = mg×d
W = 60 kg × 9.8 m/s²×12 m
W = 7056 J
So, the amount of work done is 7056 J.
Dominique and her sister are practicing their basketball skills at the park. If both Dominique and her sister both throw their basketballs at the same time and they hit each other. What would happen to their basketballs? a) Only the basketball's speed would be changed b) Only the basketball's directions would be changed c) Both the basketball's speed and direction would change d) Neither the basketball's speed nor direction would change
Answer:
Option C, Both the basketball's speed and direction would change
Explanation:
When two objects travelling with certain speed interact with each their internal forces changes and hence their motion changes simultaneously.
In general cases it is said that momentum is conserved. Momentum is nothing but just the product of mass and velocity.
As the motion of the football changes, then momentum also changes. Since mass is a constant value, it is the velocity of the football that changes.
Hence, both speed and direction of both the football changes.
Option C is correct
6 N M 8N
What is the net force?
Answer:
14 Newtons
Explanation:
6N + 8N = 14N
Find the current in the 12 ohm resistor.
Answer:
1.5 A
Explanation:
V =I.R
18 = I × 12
I = 18/12
= 3/2 = 1.5 A
What is the characteristic that allows an object to have kinetic energy?
25 POINTS please help!
What is average acceleration?
a. how fast a speed is changing over an interval of time
b. how fast velocity is changing at a specific instant in time
c. how fast a direction is changing at a specific instant
d. all of the above
Answer:
b
Explanation:
Answer: b
Explanation:
Turning A of the generator spins a magnet and creates an electric current that lights the bulb. Which of the following observations can be used to indicate the strength of the current created by the generator? *
A. The brightness of the bulb
B. The size of the magnet
C. The length of the handle
D. The mass of the generator
Answer:
A. The brightness of the bulb
Explanation:
An electric current through a circuit turns the lights bulb on. the strength of the current created by the generator will be indicated by the brightness of the bulb because in a closed circuit, the bulb is the only object that is representing that, circuit is properly placed and when bulb lights up only when electrical energy is generated.
More electrical energy generated through the generator means the brighter the bulb glow.
Hence, the correct answer is "A. The brightness of the bulb".