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Art [367]
3 years ago
11

A body can have zero average velocity but not zero average speed. Why?​

Physics
1 answer:
bogdanovich [222]3 years ago
5 0
Displacement can be zero so velocity is zero but the distance won’t be zero so speed won’t be zero
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Gravity provides a centripetal force on the Moon, helping it stay in orbit around Earth.
Elodia [21]

Answer:

The statement is true.

Both gravity and centrifugal force act on the Moon which causes it get pulled towards Earth (gravity) and get "flung away" so it doesn't hit us (centrifugal force).

4 0
4 years ago
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A ball is thrown horizontally at a speed of 24 m/s from the top of a cliff. if the ball hits the ground 4.0 s later, approximate
marishachu [46]
144 m 24 divided by 4 = 6 24 x 6 = 144
6 0
3 years ago
If a car can go from 20m/s to 40m/s in 4.0 secs, what would be it’s acceleration?
MariettaO [177]
This is a problem that would be a good test of your understanding rather than your ability to work the formulas. 5m/s² means that the velocity increase each second is 5 m/s. So 4 s of that acceleration would increase the speed (in m/s) from 20 to 40. (Speed increase each second is 5 m/s. We need an increase of 20 m/s.)

Since the acceleration is uniform during those 4 s, we can use the simple average speed of 30 m/s. 30 m/s * 4 s = 120 m.
5 0
4 years ago
What is the function of the labeled structures?<br><br> A: <br><br> B: <br><br> C:
poizon [28]

Answer:

A: receives information

B: Carries information away from the cell body

C: Delivers information to the next cell

Explanation:

4 0
4 years ago
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Listed following are three possible models for the long-term expansion (and possible contraction) of the universe in the absence
sineoko [7]

Answer:

From smallest ratio to the largest ratio:

Coasting Universe - Critical Universe - Recollapsing Universe(From left to right)

Explanation:

The coasting universe is one that expands at a constant rate given by the Hubble constant throughout all of cosmic time. It has a ratio of actual density to critical density that is less than 1

The critical universe is one that is at balance with no expansion .I.e. the actual density and the critical density are equal, which makes the ratio of actual density to critical density to be equal to 1

Recollapsing Universe: The expansion of the universe reverses in the future and the universe eventually recollapses. The recollapsing universe has the ratio of the actual density to the critical density to be greater than 1

7 0
3 years ago
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