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shusha [124]
3 years ago
15

jamal wanted only to test the effect of the free fall and so he put his system in a vacuum to prevent air resistance. In free fa

ll, will the crumpled or flat paper reach the ground first?
Physics
2 answers:
Elis [28]3 years ago
8 0

Explanation :

It is given that, Jamal wanted only to test the effect of the free fall and so he put his system in a vacuum to prevent air resistance.

Vacuum is also called as free space. In a vacuum there is no air resistance. We know that the air resistance depends on surface area.

But in the vacuum there is is no resistive force. So, in free fall both crumpled or flat paper will reach the ground at the same time.

Alborosie3 years ago
6 0

Both papers will reach the ground at the same time. CORRECT ANSWER

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How much time does it take light from a flash camera to reach a subject 6.0 meters across a room in scientific notation?
wariber [46]

The time it takes light from a flash camera to reach a subject 6.0 meters across a room in scientific notation is 2.0 *10^-8 s.

<u>Explanation:</u>

<u>Given</u>

t=?

d=6m

v=3*10^8 m/s

we  have,  v=d/t

here t=d/v

t=6m/3*10^8 m/s

v=2*10^-8 m/s

The time it takes light from a flash camera to reach a subject 6.0 meters across a room in scientific notation is 2.0 *10^-8 s.

<u></u>

6 0
3 years ago
If an object starts from rest, what is its initial velocity?
Vladimir79 [104]

Answer:

0 m/s

Explanation:

velocity= change in displacement/ time

at rest, the ball does not travel any distance

0/ t

=0

4 0
3 years ago
Explain how you can work out the
Ne4ueva [31]

Answer:

The speed of light changes as it moves between media. This causes refraction. Angles of refraction can be calculated using known speeds or wavelengths. Beyond the critical angle, light is reflected.

8 0
3 years ago
All household circuits are wired in parallel. A 1140-W toaster, a 270-W blender, and a 80-W lamp are plugged into the same outle
VARVARA [1.3K]

Answer:

total current = 12.417 A

so it will not fuse as current is less than 15 A

Explanation:

given data

toaster = 1140-W

blender = 270-W

lamp = 80-W

voltage = 120 V

solution

we know that current is express as

current = power ÷ voltage   ......................1

here voltage is same in all three device

so

current by toaster is

I = \frac{1140}{120}

I = 9.5 A

and

current by blender

I = \frac{270}{120}

I = 2.25 A

and

current by lamp is

I = \frac{80}{120}

I = 0.667 A

so here device in parallel so

total current is = 9.5 A + 2.25 A + 0.667 A

total current = 12.417 A

so it will not fuse as current is less than 15 A

8 0
3 years ago
Balanced or Unbalanced?
Galina-37 [17]

Unbalanced because if it is pushing then stopping, that means that it is unbalanced.

6 0
3 years ago
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