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Lera25 [3.4K]
3 years ago
8

If a 3-kg rock is thrown at a speed of 2 m/s in a gravity-free environment (presuming one could be found), then an unbalanced fo

rce of 6 N would be required to keep the rock moving at a constant speed.
Select one:
a. False
b. True
Physics
2 answers:
lbvjy [14]3 years ago
5 0

That's false.

NO FORCE is required to keep an object moving at a constant speed.

Katarina [22]3 years ago
3 0

Answer:

a. False

Explanation:

For an object to be moving at a constant velocity, a net force of 0 N would be required.

Newton's 1st Law of Motion states that an object will remain at rest unless acted upon by an unbalanced force, and an object will remain in motion unless acted upon by an unbalanced force.

Therefore, the unbalanced force of 6 N would not allow the rock to maintain its constant speed.

The answer to this question is A) False.

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The amount of energy necessary to remove an electron from an atom is a quantity called the ionization energy, Ei. This energy ca
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The value is E_i  =  1.5596 *10^{-18} \  J

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From the question we are told that

The wavelength is \lambda  =  48.2 nm  =  48.2  *10^{- 9 }\  m

The velocity is v = 2.371*10^6 \ m/s

The mass of electron is m_e  =  9.109*10^{-31} \  kg

Generally the energy of the incident light is mathematically represented as

E =  \frac{h *  c}{\lambda}

Here c is the speed of light with value c =  3.0 *10^{8} \  m/s

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=> E = 4.12 *10^{-18} \  J

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