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devlian [24]
3 years ago
8

Any person who opens the door he applies​

Physics
1 answer:
miskamm [114]3 years ago
5 0

Answer:

any person who opens the door he applies pulling force

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Một tải có điện trở R = 19ohm đấu vào nguồn điện một chiều có E = 100V,
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Hindi ko alma yam among twang yan

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2 years ago
If a 40,000g cannon ball is 35m above the Earth's surface, how much potential energy does the cannon
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8 0
3 years ago
A car with a mass of 850kg is moving at a speed of 72km/h when colliding with a concrete wall until it stops. After the collisio
Sergeeva-Olga [200]

Answer:

Explanation:

The vehicle is experiencing a large force created by the concrete wall.

Equation

vf^2 = vi^2 + 2*a * d

Givens

vf = 0   The car eventually does stop.

vi = 72 km/hr * [ 1000 m/  km] * [1 hour / 3600 seconds]

vi = 20 meters / second

a = ?

m = 850 kg

Solution

vf^2 = vi^2 + 2a*d

0 = 20 m/s + 2* 2 *a

-20 m/s = 4a

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a = - 5 m/s^2   The minus sign tells you the vehicle is slowing down. It sure should be.

Force = m * a

F = - 850 * (-5)

F =  - 4250 N

The car provides a 4250 N force on it going east to west and a 4250 N force going from west to east provided by the concrete wall.

8 0
3 years ago
A shorter electromagnetic wave is _____.<br> more powerful<br> less powerful<br> hotter<br> colder
zhannawk [14.2K]
A shorter electromagnetic wave is hotter.
A shorter electromagnetic wave produce heat hotter than ultraviolet rays. Because it produces both gamma rays and ultraviolet rays that makes it hotter that the heat of the sun.
5 0
3 years ago
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