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solmaris [256]
3 years ago
8

Consider the following True/False statements:

Physics
1 answer:
Ainat [17]3 years ago
4 0

Answer:

6) False

7) True

8) False

9) False

10) False

11) True

12) True

13) True

14) True

Explanation:

The spacing between two energy levels in an atom shows the energy difference between them. Clearly, B has a greater value of ∆E compared to A. This implies that the wavelength emitted by B is greater than A while B will emit fewer, more energetic photons.

When atoms jump from lower to higher energy levels, photons are absorbed. The kinetic energy of the incident photon determines the frequency, wavelength and colour of light emitted by the atom.

The energy level to which an atom is excited is determined by the kinetic energy of the incident electron. As the voltage increases, the kinetic energy of the electron increases, the further the atom is from the source of free electrons, the greater the required kinetic energy of free electron. When electrons are excited to higher energy levels, they must return to ground state.

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A man throws a ball straight up to his friend on a balcony who catches it at its highest point. The ball was thrown with an init
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Answer:

The maximum height reached by the ball is 16.35 m.

Explanation:

Given;

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The maximum height reached by the ball is given by;

v² = u² + 2gh

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h = 16.35 m

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Answer: A, C, E

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For c, th = 375k, efficiency = (1-300/375) = 20% 


Hence in case of a and b, efficiency claimed is lesser than efficiency calculated, which is valid case and in case of c, however efficiency claimed is greater which is invalid. 

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The momentum of the rolling ball will have less momentum than before the collision and the stationary ball will have more momentum after the collusion.
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