3 years ago

How will a positive and a negative charge react to each other?

1 answer:

5 0

Objects with like charge repel each other; meanwhile objects with opposite charge with attract each other.

Ex: A positive and positive charge will push apart and a positive and a negative charge will push together.

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Which of the following changes will always increase the efficiency of a thermodynamic engine? Choose all correct statements.

Ilya [14]

Answer:B,C,D

Explanation:

Thermodynamic efficiency is given by

$\eta =1-\frac{T_C}{T-H}$

$\eta$ efficiency can be increased by Keeping $_c$ constant and increasing $T_H$

Keeping $T_H$ constant and decreasing $T_c$

by increasing $\Delta T=T_H-T_c$

by decreasing $\frac{T_C}{T_H}$ ratio

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3 years ago

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IrinaK [193]

The answer is d (head for cover)

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2 years ago

Which of the following has more inertia?? bowling ball , hammer, Tennis ball feather

I am Lyosha [343]

The bowling ball would have the most inertia because it has the most mass. Inertia is the ability to resist a change in motion. So, it sort of makes sense that the more massive an object, the more resistance it has against outside forces.
Bowling ball would be your answer since it has the most mass.

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3 years ago

The earth’s magnetic field is located in the _____.

Natali [406]

Near Greenland in the northern hemisphere <span />

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3 years ago

If you want to make a flashlight and have two batteries and a light bulb how would you hook them up to make it bright and why?

ValentinkaMS [17]

Answer:

The positive end of battery 1 touching the negative end of battery 2 and wires connecting the negative of battery 1 to the light light bulb and the positive of battery 2 to the light bulb.

Explanation:

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3 years ago