PHYSICS HIGH SCHOOL

Which materials are the best thermal insulators?a) metals

b) solids

c) liquids

d) gases

Answers

Answer 1
Answer: I think that the answe is gasses.
Answer 2
Answer:

gases nova net

hope it helps

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When a pot of water is put on a stove, the water at the top gets hot primarily by ____.a. radiation c. convection b. conduction d. condensation Certain materials can become superconductors under what conditions? a. When it is very hot c. Under very high pressure b. When it is very cold d. Under very low pressure
Of waterfalls with a height of more than 50 m , Niagara Falls in Canada has the highest flow rate of any waterfall in the world. The total average flow rate of the falls is 2.80×10³ m³/s and its average height is 52.0 m (Niagara Falls Live, 2017). Given that the density of water is 1.00×10³ kg/m³, calculate the average power output of Niagara Falls.Average power output: _________.
A piston above liquid in a closed container has an area of 1m2. The piston carries a load of 350 kg. What will be the external pressure on the upper surface of the liquid in KPA
How does a scrap heap magnet work? (In detail)
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What is an astronomical unit?the average distance between planets in the solar system
the average distance between the Earth and the moon
the approximate diameter of the Sun including its atmosphere
the average distance between the Earth and the Sun

Answers

Answer:

D

Explanation:

An object traveling in a straight line accelerates. What will definitely happen due to the acceleration?

Answers

"Acceleration" means any change in speed or direction of motion. 
If the object is known to be accelerating even though it's traveling
in a straight line, then we know that its speed must be changing.

Select all the features that can be created by acidic water

Answers

Since you did not enumerate the features to choose from, I'll just give you a brief information about acidic water.

>Acidic water has a pH below 7 or less than 7.0.
> Acidic water can dissolve a limestone rock.
> The land features which are formed in limestone by reaction with acid water are the stalactites and the stalagmites.

a 4768-kg roller coaster train full of riders approaches the loading dock at a speed of 17.1 m/s. It is abruptly decelerated to a speed of 2.2 m/s over a distance of 13.6m. Determine the magnitude of the restraining force that acts upon the roller coaster cars.

Answers

Answer:

Explanation:

To determine the magnitude of the restraining force acting on the roller coaster cars, we can use the equation:

Force = Mass * Acceleration

1. Calculate the initial velocity:

Initial velocity (u) = 17.1 m/s

2. Calculate the final velocity:

Final velocity (v) = 2.2 m/s

3. Calculate the change in velocity:

Change in velocity (Δv) = v - u = 2.2 m/s - 17.1 m/s = -14.9 m/s (negative because the roller coaster is decelerating)

4. Calculate the distance traveled:

Distance (d) = 13.6 m

5. Calculate the acceleration:

Acceleration (a) = Δv / t

We need to calculate the time (t) first. To do this, we can use the equation of motion:

v = u + at

Rearranging the equation, we have:

t = (v - u) / a

Substituting the values, we have:

t = (-14.9 m/s) / a

6. Now, substitute the values into the equation to calculate the acceleration:

a = (v - u) / t

a = (-14.9 m/s) / (-14.9 m/s / a)

a = 1 m/s^2

7. Calculate the magnitude of the restraining force:

Force = Mass * Acceleration

Mass = 4768 kg

Force = 4768 kg * 1 m/s^2

Force = 4768 N

Therefore, the magnitude of the restraining force that acts upon the roller coaster cars is 4768 Newtons.

Why are peer reviews important?

Answers

Answer:

Peer reviews are important because individuals with similar background knowledge are used to review work to detect inaccuracies or deficiencies in the work.

Explanation:

Those individuals with similar educational and work background knowledge can more accurately review work since they have the required knowledge base for the subject.

Answer and explanation;

Peer review is a very important process that authors have to go through before they are able to publish their research manuscript. The main purpose is to ensure that whatever comes out published is in its excellent form, i. e., virtually free of errors.

Benefits;

1, Corrects vague terms
2, Provides feedback as to the effectiveness of your communication
3, Allows you to see other people’s perspectives on issues raised
4, Prevents you from committing serious blunders in your arguments
5, Gives confidence
6, Facilitates concise writing
7, Improves Grammar
8, Allows you to expound on your points
9, Confirms your observations
10, Encourages you to perform better next time

What is the rms Voltage value and why we use it ?

Answers

Suppose that you have an alternating current generator. If you want to get the same result with a direct current (DC) generator, you have to set the voltage to the RMS (Root Mean Square) value of the (AC). In short, RMS is the value of the direct current voltage that is used instead of an alternating current.
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