PHYSICS HIGH SCHOOL

Which statement describes dynamic equilibrium? A. The forces on an object in motion are balanced. B. An object is accelerating due to forces acting on it. C. The forces on an object are unbalanced. D. The forces on a stationary object are balanced.

Answers

Answer 1
Answer:

Answer: A. The forces on an object in motion are balanced.

Explanation:

The dynamic equilibrium is defined as the phase when an object moves at a constant velocity such that all forces on the object are balanced.

Simple case of dynamic equilibrium: A horizontal force is applied to an object making it run with a constant velocity across a surface.

Hence, the statement describes dynamic equilibrium is " The forces on an object in motion are balanced. "

So, the correct option is "A".
Answer 2
Answer:

Answer:

Hope this helps!

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A fan uses 7A when connected to a 110V line. If electric power costs 10 cents per kilowatt-hour in this location, what is the cost of running the fan for 13 hours?

Answers

Power = current x voltage

So the power is 7 x 110 = 770 W = 0.77kW

0.77 x 13 = 10.01 kWh

10.01 x 10 cents = 100.1 cents (is this 1 dollar? Idk I use a different currency)

Within a single use of the scientific method, which of the following steps can only be performed afterdata is collected?
A. Controls and variables are chosen.
B. The initial experiment is designed.
C. The initial hypothesis is formed.
D. Conclusions are drawn.

Answers

Within a single use of the scientific method, the step which would be performed after we collect data, would be the drawing of a conclusion out of the answers that you've presented - D.

It is usually the case that you first have to analyze the data after you've gather it and then you base your conclusions on it. This isn't, however, always the case. 

How does crater density relate to the moon’s geologic history?

Answers

The crater density related to the moon's geologic history through its crater on the surface. The greater density it has, the older the surface must be. This means that the crater can actually determine how old its geologic history must be. 

Answer:

High crater density is associated with older surfaces.

Explanation:

What is this equation for?

Answers

That's the equation for the efficiency of any machine or other system that you use to change energy from one form to another. It says that the efficiency of that device is equal to the work or energy that comes out of it divided by the work or energy that you put into it.

Which statement best explains the relationship between the electric force between two charged objects and the distance between thema) As the distance increases by a factor, the electric force increases by the square of that factor.
b) As the distance increases by a factor, the electric force increases by twice that factor.
c) As the distance increases by a factor, the electric force decreases by twice that factor.
d) As the distance increases by a factor, the electric force decreases by the same factor.
e) As the distance increases by a factor, the electric force decreases by the square of that factor.

Answers

'e' is the accurate description.

In a series circuit containing two unequal resistors, higher power is developed in the

Answers

In a series circuit, the current that passes through both resistors is equal. What determines the power in that element would be the value of the resistance. In terms of current and resistance, power would be equal to the square of current multiplied by the resistance. So having a higher value of resistance would result in higher power.
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