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natita [175]
2 years ago
15

The speed of light (c) is:

Physics
1 answer:
Radda [10]2 years ago
7 0

Answer:

A

Explanation:

Speed of light is 299 792 458 m / s. So option A is answer.

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A tennis ball travelling at a speed of 46m/s with a mass of 58kg. Calculate the kinetic<br>energy​
Zanzabum

Answer:

its 1/2 the mass of the object times by its velocity ^ 2

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Consider a ball of 0.22 kg, initially at rest, is dropped from an initial height of 1.80 m. It rebounds back after colliding wit
I am Lyosha [343]

Answer:

The impulse on the ball delivered by the floor is 2.52 kg-m/s.

Explanation:

Given that,

Mass of the ball, m = 0.22 kg

It  is dropped from an initial height of 1.80 m. It rebounds back after colliding with the floor to a final height of 1.50 m. Initial velocity and final velocity can be calculated using conservation of energy as :

u=\sqrt{2gh} \\\\u=\sqrt{2\times 10\times 1.8} \\\\u=6\ m/s

Final velocity,

v=\sqrt{2gh'} \\\\v=\sqrt{2\times 10\times 1.5} \\\\v=5.47\ m/s

As the ball rebounds, v = -5.47 m/s

We need to find the impulse on the ball delivered by the floor. We know that impulse is equal to the change in momentum as follows :

J=m(v-u)\\\\J=0.22\times ((-5.47)-6)\\\\J=-2.52\ kg-m/s

So, the impulse on the ball delivered by the floor is 2.52 kg-m/s.

7 0
3 years ago
Negative effects of restricting roles in a democratic society​
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Answer:

it could lead to riot

it could lead to uncertainty of life and property

5 0
3 years ago
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The Earth orbits around the sun. Which scenario would cause the
lys-0071 [83]

Answer:

B

Explanation:

because. it reduces the distance between the earth

7 0
3 years ago
A marble rolls off a table with a speed of 2.30 m/s. If the table is 1.12 m high, how far from the
Vlada [557]

Answer:

1.10 m

Explanation:

First, find the time it takes to land.

Given, in the y direction:

Δy = 1.12 m

v₀ = 0 m/s

a = 9.8 m/s²

Find: t

Δy = v₀ t + ½ at²

(1.12 m) = (0 m/s) t + ½ (9.8 m/s²) t²

t = 0.478 s

Next, find the distance traveled in that time.

Given, in the x direction:

v₀ = 2.30 m/s

a = 0 m/s²

t = 0.478 s

Find: Δx

Δx = v₀ t + ½ at²

Δx = (2.30 m/s) (0.478 s) + ½ (0 m/s²) (0.478 s)²

Δx = 1.10 m

6 0
4 years ago
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