PHYSICS HIGH SCHOOL

Waves = 24, Time
6 seconds, Frequency=

Answers

Answer 1
Answer:

Answer:

4 times/second

Explanation:

24/6 = 4

THE END

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Assumes matter is made of small particles in constant motion

Answers

Kinetic molecular Theory of Matter. This is the model or theory that you are looking for.

In a parcel of vacant land located in a blighted area where there is no demand for land, which statement is true?

Answers

Answer:

The highest and best use may be to remain vacant.

According to the exercise principle of balance, a workout should __________.a. address all components of fitness
b. focus on balance and coordination
c. target specific areas for improvement
d. vary exercise activities over time

Answers

a. address all components of fitness 

According to the exercise principle of balance, a workout should address all components of fitness.
NOT:
b. focus on balance and coordination 
c. target specific areas for improvement 
d. vary exercise activities over time
According to the exercise principle of balance, a workout should:


a. address all components of fitness 

Explanation:

The Balance Principle dictates that each one training should be properly proportioned so as to realize best results. This broad principle operates at several levels of human performance.
All things moderately apply to sports coaching moreover general health and well being
This principle suggests that the proper mixture of coaching activities, diet, and healthy way habits are needed for the best functioning

Two polarizers are arranged as shown. How much light will reach point X?0%
more than 50% but less than 100%
50%
less than 50% but more than 0%
100%

Answers

Answer:

50% if light is unpolarized

100% if light is horizontally polarized

0% if light is vertically polarized

Explanation:

A polarizer has an axis that "blocks" the component of light in the direction perpendicular to the direction of the polarizer axis.

When unpolarized light passes through a polarizer, the intensity of light is reduced to (I_0)/(2), where I_0 is the initial intensity of the light: this is because only the component of the light parallel to the axis of the polarizer will pass through, and this component makes 1/2 of the incident light intensity. In this case, since the axis of the polarizer is horizontal, only the horizontal component of the light will pass through, while the vertical component will be blocked. So in this case the final intensity will be 50% of the initial one.

On the other hand, if the incoming light is already horizontally polarized (same orientation as the polarizers), there is no vertical component to block, so all the light passes through the polarizer; therefore, the final intensity will be 100% of the original intensity.

Finally, if the incoming light is vertically polarized, no light will pass through it, because the polarizer's axis is horizontal, so it will block all the vertically polarized light: so the final intensity will be 0% of the original intensity.

All of this is after passing the 1st polarizer; so, after passing the 1st polarizer, the light is now horizontally polarized. Then, the intensity of the light passing through the 2nd polarizer is given by Malus' Law:

I=I_0 cos^2 \theta

where \theta is the angle between the axes of the two polarizers. Since here the two polarizers axes are parallel to each other, \theta=0, so cos \theta=1, and so the intensity after the 2nd polarizer is exactly the same as the intensity after the 1st polarizer.

Diffraction patterns are due to

Answers

diffraction patterns are due to diffraction i think  or self interference

Answer:

Diffraction patterns are due to INTERFERENCE.

Explanation:

For the examples below, explain what a physical change or a chemical change has occurred. Justify your answerA. When you mix baking soda and vinegar, carbon dioxide is released.
B. You build a tall sand castle at the beach. After wave washes it over, the sand castle turns into a big pile of sand
C. Boiling water turns a raw egg into a hard boiled egg
D. Max divided cookie dough into small pieces on a cookie sheet.
E. A loaf of freshly baked bread tastes better and looks much different than a lump of bread dough
F. A glass of water is left in the Sun. In the time, the water evaporates leaving the glass empty.

Answers

A. chemical change, a new substance is formed and the effect cannot be undone.
B.physical change, there is no new substance made and the effect can be undone
C.chemical change, the effect cannot be undone
D.physical change, the effect can be undone
E.chemical change, a new substance is made and the effect cannot be undone
F.physical change, there is no new substance and the effect can be reversed

hope this helps :)
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