PHYSICS HIGH SCHOOL

The absolute magnitude of a star is the amount of light received by Earth. a. True
b. False.

Answers

Answer 1
Answer: B.false......absolute magnitude

Measure of the amount of light a star actually gives off.....thats the definition....hop this is helpful
Answer 2
Answer:

So this statement is false.

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Another machine uses an input of 200 newtons to produce an output force of 80 newtons what is the mechanical advantage of this machine

What is the mechanical advantage of a wedge that is 2 inches at its widest part and has a sloped side with a length of 10 inches?a. 0.2b. 5c. 8d. 20

Answers

Answer:

B) 5

Explanation:

Mechanical advantage = D/W

= 10/2

= 5.

It has no unit because the inches in the length and width will cancel out.

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.

Elaborate on the reason(s) that matter is said to move even as in a solid state.A) The particles are bound through intermolecular forces but are able to move past each other with relative freedom.
B) The particles have sufficient energy to become an ionized gas and are in the most common state of matter in the universe.
C) The particles are not able to move out of their positions relative to one another, but do have small vibrational movements.
D) The particles are not bound to one another, move quickly, have a low density, and are able to spread apart from one another if unconstrained.


Brad and Matt are working in the lab. They noticed that when they mixed two dilute solutions together, the reaction between them happened very slowly. Which of Matt's suggestions would BEST help to increase the rate of this reaction?

A) increase the concentration of both solutions
B) decrease the concentration of both solutions
C) increase the concentration of one of the solutions
D) decrease the concentration of one of the solutions


Identify the correct order of increasing intermolecular force of attraction for the three most common states of matter.
A) liquid → solid → gas
B) solid → liquid → gas
C) gas → liquid → solid
D) gas → solid → liquid

Answers

1) The correct answer is
C) The particles are not able to move out of their positions relative to one another, but do have small vibrational movements.
In solids, in fact, particles are bound together so they cannot move freely. However, they can move around their fixed position with small vibrational movements, whose intensity depends on the temperature of the substance (the higher the temperature, the more intense the vibrations). For this reason, we say that matter moves also in solid state.

2)  The correct answer is
A) increase the concentration of both solutions
In fact, when we increase the concentration of both solutions, we increase the number of particles that react in both solutions; as a result, the speed of the reaction will increase.

3)  The correct answer is
C) gas → liquid → solid
In gases, in fact, particles are basically free to move, so the intermolecular forces of attraction are almost negligible. In liquids, particles are still able to move, however the intermolecular forces of attraction are stronger than in gases. Finally, in solids, particles are bound together, so they are not free to move and the intermolecular forces of attraction are very strong. 

Polychlorinated biphenyls (PCBs) have been banned because they are an environmental hazard. Which of the following was NOT a reason for banning them?

Answers

Answer:

PCBs have high electrical resistance and are excellent insulating materials.

Explanation:

Polychlorinated biphenyls [PCBs] are industrial chemical compounds made by man, which contains carbon, hydrogen and chlorine atoms. They can be used in the production of paints and dyes, heat transfer, etc.

There has been the ban on the use of these compounds because they are said to be very stable, and yield slowly to degradation by nature. They have low and not high electrical resistance.  

What is the time required for an object startingfrom rest to fall freely 500. meters near Earth’s
surface?
(1) 51.0 s (3) 10.1 s
(2) 25.5 s (4) 7.14 s

Answers

The time required for an object starting from rest to fall freely 500. meters near Earth’s is 10.1 s

Without air resistance Distance  =  1/2 g T²

500 m  =  (1/2) (9.8 m/s²) (T²)

 500 m  =  (4.9 m/s²) (T²)

Divide each side by   (4.9 m/s²)  

T²  =  (500 m) / (4.9 m/s²)

= 102.04 s²

T  =  √ (102.04 s²)

T =  10.1 seconds

To learn more about how to Calculate Distance refer:brainly.com/question/661229

#SPJ2
(3) 10.1 second Using equation of motion 500 = (0.5)(9.81)t^2. Rearranging, t = sqrt(1000/9.81) = 10.1s

A measure of randomness or disorder

Answers

It is simply called Entropy.
a measure of randomness or disorder is entropy
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