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pochemuha
3 years ago
9

What evidence do scientists have that earth has been hit by large objects like asteroids in the past

Physics
1 answer:
Fantom [35]3 years ago
3 0

CRATERS AND METEORITES

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A ball is dropped from a height of 20m. If its velocity increases uniformly at the rate 10m/s2 with what velocity and after what
belka [17]

Answer: 2 seconds

Explanation:

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3 years ago
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A force causes a mass of 4 kg to have an acceleration of 8 m/s2. Suppose something causes the mass to be one-quarter of its orig
solniwko [45]

Explanation:

From Newton's second law:

F = ma

Given that m = 4 kg and a = 8 m/s²:

F = (4 kg) (8 m/s²)

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If m is reduced to 1 kg and F stays at 32 N:

32 N = (1 kg) a

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So the acceleration increases by a factor of 4.

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3 years ago
On a small planet, an astronaut uses a vertical
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Constant velocity means the netto force = 0, therefore F(gravity) = F(astronaut).
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2 years ago
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A police car parked on the side of the highway emits a 1200 Hz sound that bounces off a vehicle farther down the highway and ret
emmasim [6.3K]

f' = frequency observed by the police car after sound reflected from the vehicle and comes back to police car = 1250 Hz

f = frequency emitted by the police car  = 1200 Hz

V = speed of sound = 340 m/s

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frequency observed by the police car is given as

f' = f (V + v)/(V - v)

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v = 6.9 m/s

4 0
3 years ago
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Differentiate between sound waves and seismic waves?
algol13

The only real difference is that common seismic waves travel through the ground and sound waves travel through the air. If you had a pipe attached to granite and you were listening to it, you might detect both.

7 0
2 years ago
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