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3 years ago

If a body starts moving from rest itsinitial velocity isų Vzerom/s

Physics

1 answer:

Artist 52 [7]3 years ago

6 0

Answer:

zero

When a Body start a from rest ,its initial velocity is zero.

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When a 4-μf capacitor has a potential drop of 20 v across its plates, how much electric potential energy is stored in this capac

Genrish500 [490]

Thew energy stored in a capacitor of capacitance $C$ and voltage between the plates $V$ is

$E=\frac{1}{2} CV^2$ .

Substituting numerical value

$E=\frac{1}{2}(4*10^{-6}) (20)^2\\ E=800\; \mu J$

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4 years ago

Which scientist was the first to propose the heliocentric model of the universe

Marianna [84]

The answer would be Nicholas Coperniucus

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4 years ago

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yanalaym [24]

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3 years ago

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An object is 45.0 kg here on Earth. What is its mass on Jupiter if the acceleration

puteri [66]

Answer:

B. 45.0 kg

Explanation:

On earth the object has ;

Mass = 45 kg

acceleration = 9.81 m/s²

On Jupiter, acceleration is 24.79 m/s²

The mass of this object on Jupiter will be 45 kg. It will not change. Mass of an object will only change when you remove part of the object from it or add to it another part. The mass is the same on Earth and on Jupiter. However, due to increased acceleration on Jupiter , the weight will change/ increase because;

Weight = mass * acceleration

On Earth

Weight of the object will be : 45 * 9.81 = 441.45 kg

On Jupiter

Weight of the object will be : 45*24.79 =1115.55 kg

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3 years ago

A mail carrier leaves the post ofﬁce and drives 2.00 km to the north. He then drives in a direction 60.0° south of east for 7.00

den301095 [7]

Answer:

$\theta=7^o$

Explanation:

Displacement

It is a vector that points to the final point where an object traveled from its starting point. If the object traveled to several points, then the individual displacements must be added as vectors.

The mail carrier leaves the post office and drives 2 km due north. The first displacement vector is

$\vec r_1=\ km$