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3 years ago

13

a summer thunderstorm has begun! it’s raining. lighting cracks through air. a few seconds later you hear booms of thunder. why d

o you see the lighting before you hear the thunder?

2 answers:

Afina-wow [57]3 years ago

8 0

Lightning comes before sound, other wise said, light travels faster than sound

Hope this helps.

Illusion [34]3 years ago

4 0

Light travels faster than sound

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A 5.6 g marble is fired vertically upward using a spring gun. The spring must be compressed 6.4 cm if the marble is to just reac

N76 [4]

Answer: im not gonna give i to you just do 15+15=_+ 5.6+6.4 easy

Explanation: i took the test and got a 100%

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2 years ago

What is the force acting on a 10kg object that accelerates from 5 m/s to 20 m/s in 5s?

vitfil [10]

Answer:

Option C

Explanation:

v= u + at

20 = 5 + a(5)

15= a(5)

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3 years ago

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3 years ago

NUCLEAR POWER PRODUCES LESS TOXIC SULFUR THAN COAL BURNING ELECTRICITY TRUE OR FALSE

konstantin123 [22]

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3 years ago

Read 2 more answers

A diver running 2.5 m/s dives out horizontally from the edge of a vertical cliff and 3.0 s later reaches the water below. how hi

Elodia [21]

<u>Answer:</u>

a) Height of cliff = 44.145 meter

b) 7.5 meter far from its base the diver hit the water.

<u>Explanation:</u>

We have equation of motion , $s= ut+\frac{1}{2} at^2$ , s is the displacement, u is the initial velocity, a is the acceleration and t is the time.

Diver's vertical motion:

Initial velocity = 0 m/s, acceleration = 9.8 $m/s^2$ , we need to calculate displacement when time is 3 seconds.

$s= ut+\frac{1}{2} at^2\\ \\ =0*3+\frac{1}{2} *9.81*3^2\\ \\ =44.145meter$

So height of cliff = 44.145 meter.

b) Diver's horizontal motion:

Initial velocity = 2.5 m/s, acceleration = 0 $m/s^2$ , we need to calculate displacement when time is 3 seconds.

$s= 2.5*3+\frac{1}{2}*0*3^2\\ \\ =7.5meter$

So 7.5 meter far from its base the diver hit the water.

5 0

3 years ago