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k0ka [10]
4 years ago
13

What do we call it when two or more moving objects exert forces on each other for a short period of time?​

Physics
1 answer:
ICE Princess25 [194]4 years ago
8 0

Answer:

It is called a collision.

Explanation:

When two objects bump into each other, this is called a collision. In physics, a collision doesn't have to involve an accident (like two cars crashing into each other), but can be any event where two or more moving objects exert forces on each other for a short period of time.

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When a beam of light passes at an oblique angle into a material of lower optical density, the angle of incidence is
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A hydrogen-filled balloon is used to lift a 120-kg stone off the ground. The basket holding the stone has a mass of 10.0 kg . Pa
Kaylis [27]

Answer:

Radius, r = 2.88 meters.

Explanation:

It is given that,

A hydrogen-filled balloon is used to lift a 120-kg stone off the ground, m₁ = 120 kg

The basket holding the stone has a mass of 10.0 kg, m₂ = 10 kg

Mass density of air, d=1.29\ kg/m^3

We know that buoyant force is equal to the weight of liquid displaced i.e.

B=mg

B=(m_1+m_2)g

B=(120+10)\times 9.8

B = 1274 N

Also, buoyant force is given by :

B=dVg

B=\dfrac{4\pi r^3dg}{3}

r^3=\dfrac{3B}{4\pi dg}

r^3=\dfrac{3\times 1274}{4\pi \times 1.29\times 9.8}

r=2.88\ m

So, the minimum radius R of the balloon be in order to lift the stone off the ground is 2.88 meters. Hence, this is the required solution.

3 0
4 years ago
A jet travels at 489 meters per second how long does it take to travel 235 m? answer in seconds
Sladkaya [172]

if in 1 second the jet goes 428 meters and you want to know how long it takes to go 237 meters you just divide 237/428  

it can be written like this  

_1_ = __x__  

428 237  

cross multiply  

428 times x = 1 times 237  

428x=237  

divide by 428 on both sides  

x= 237/428  

x=0.5537 seconds

7 0
4 years ago
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