PHYSICS HIGH SCHOOL

Momentum is a measure of ____.a. how hard it is to stop an object
b. the amount of matter in an object
c. the tendency of an object to change its motion
d. the amount of force acting on an object

Answers

Answer 1
Answer:

Answer: Option (a) is the correct answer.

Explanation:

Momentum is the ability of an object to continue its motion. It can be measured by multiplying mass of the object and its velocity.

Mathematically,               p = m × v

where                     p = momentum

                               m = mass

                                v = velocity

Therefore, we can conclude that out of the given options, momentum is a measure of how hard it is to stop an object.

Answer 2
Answer:

Final answer:

Momentum is a measure of how hard it is to stop an object.

Explanation:

Momentum is a measure of how hard it is to stop an object. It depends on the mass and velocity of the object.

The formula for momentum is:
Momentum = mass x velocity.

Therefore, option a. 'how hard it is to stop an object' is the correct answer.

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Which substance is uniquely a product of incomplete combustion of a fossil fuel?

Answers


I can think of two of them:

-- carbon monoxide

-- black soot

which substance is uniquely a product of incomplete combustion of a fossil fuel?

carbon monoxide

A brass washer has an outside diameter of 4.50 cm with a hole of diameter 1.25 cm and is 1.50 mm thick. The density of brass is 8599 kg/m3. If you put this washer on a laboratory balance, what will it "weigh" in grams?

Answers

We will find the mass from 
mass = density x volume 
We are told the density and must find the volume from the dimensions given 
the volume of the washer will be the area x thickness (remembering to convert all measurements to meters) 
if the washer had no hole, its area would be pi (0.0225m)^2 (remember to convert to meters and to use radius) 
the area of the hole is pi(0.00625m)^2 
so the area of the washer is pi[(0.0225m)^2 - (0.00625m)^2] = 1.5x10^-3 m 
the volume of the washer is 1.5x10^-3 m x 1.5x10^-3 m = 2.25x10^-6 m^3 (the thickness of the washer is 1.5 mm = 1.5x10^-3m) 
thus, the mass of the washer = 8598kg/m^3 x 2.25x10^-6m^3 = 0.0189kg = 18.9 grams

What would happen to Earth if ocean floor were created at divergent boundaries at a faster rate than it is destroyed at convergent boundaries?

Answers

Answer:

The Earth would increase in volume

Explanation:

What would happen to Earth if ocean floor were created at divergent boundaries at a faster rate than it is destroyed at convergent boundaries?

Divergent boundaries are boundaries where plates pull away from each other, forming mild earthquakes and volcanoes as magma comes to the surface. Earthquakes are as a result of vibrations travelling within the earth or ocean floors . Volcanoes occur as a result of the eruption of  molten magma from the ocean floor

In divergent boundaries, the plates pull away and and the weakened crust in between collapse leaving more space thereby increasing in volume.

Convergent boundaries are boundaries that pull into each other. mountain chains are formed as the two plates push into each other if they are of the same density.

My dog Callie can run at 21 mi/h. How far can he travel in 10 hours?

Answers

Answer: 210 miles

Explanation:

21 mi/1 hr

21 * 10 hrs

210 mi

Select all that apply. Which statements are supported by the second law of thermodynamics? The usable energy in the universe is decreasing. The usable energy in the universe is increasing. The energy of the universe is being destroyed. The entropy of the universe is increasing.

Answers

The statements supported are:

- The usable energy in the universe is decreasing.
- The entropy of the universe is increasing.

The second law of Thermodynamics establishes that in each energy convertion, in an isolate system, a part of energy is converted into heat (unusable energy) and the entropy of the system increase.

Answer:

a and d

Explanation:

Accelaration is a derived quantity .Give reason

Answers

Answer:

The accerlation is a derived from the other quantities like change in velocity/time take etc.
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