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rewona [7]
3 years ago
13

If questions asked in a research study to do not accurately relate to the subject or construct being studied, the study’s ______

____ is compromised. A. population B. evaluation C. administration D. validity Please select the best answer from the choices provided A B C D
Physics
1 answer:
Elina [12.6K]3 years ago
4 0

Answer: d

Explanation: Did it on Ed2020 got it right

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If the mass of the block is 5 kg and the speed 7 m/s, what is the work done <br> on the block?
Kamila [148]

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A block of mass M = 5 kg is resting on a rough horizontal surface for which the coefficient of friction is 0.2. When a force F = 40N is applied, the acceleration of the block will be then (g=10ms

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So the horizontal component of force=Fcos30=40×

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​

N−6N=28.64N

The horizontal acceleration of the block=

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8 0
3 years ago
This picture represents the electric field diagram between two particles with static charges. Do the two particles have the same
dexar [7]

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No, They will attract each other, B, and neither direction

Explanation:

Since the two already presented particles in the diagram represent both opposing charges due to the direction of the arrows (the arrows facing away from the particle shows a positive charge and the particles facing towards the particle show a negative charge), not only because of this but as the arrows between the particles show an attracting magnetic field, then it can be concluded that the particles will attract to each other and if another particle was introduced into the diagram of a positive charge, then it would attract to the negatively charged particle. If you have any questions or need further explanation, please comment below. E2021, have a great day.

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Protons have a positive charge<br><br> A.True<br> B.False
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Answer:

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