PHYSICS MIDDLE SCHOOL

Which of the following is NOT a pur substance A.) milk B.) oxygen C.) water D.) carbon dioxide

Answers

Answer 1
Answer:

Answer:

milk

Explanation:

it is not a pure substance

milk does is a colloid

oxygen is an element and H20 and CO2 are compounds so they are pure

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The rate at which an object moves
which section from thr article best explains why wavelength and frequency are dependent on each other
Starting a fitness plan slowly will lead to better results than starting out quickly.Please select the best answer from the choices provided.TF
Which of the following has the greatest magnitude?30 Newtons1 Newton. 10 Newtons
A water balloon was dropped from a high window and struck its target 1.1 seconds later. If the balloon left the person's hand at -5.0 m/sec, what was its velocity on impact?

A child is sledding. He starts at the top of the hill with a velocity of zero, and 3 seconds later he is speeding down the hill at 12 meters per second. What is the child's acceleration?

Answers


Magnitude of acceleration = (change of speed) / (time for the change) =

                                             (12 m/s  -  0)   /   (3 sec)  =

                                               12/3  =  4 m/s²

What's a challenge question ?  Have we all passed the event horizon
and been spaghettified without knowing it ?

Why a soccer ball that is quickly rolling across a grass field slows and finally stops rolling

Answers

friction accord while the ball was rolling in the grass and slowed it down until it finally came to a stop
This is because of friction. If you want to add extra detail you can say that this ties in with Newton's First Law of Motion, which states that an object moving at a constant speed will stay moving at a constant speed unless there is an opposite force, and in this case, the opposite force against the ball is friction.

How does an electric motor work

Answers

AC motors work a slightly different way: they pass alternating current through opposing pairs of magnets to create a rotating magnetic field, which "induces" (creates) a magnetic field in the motor's rotor, causing it to spin around. You can read more about this in our article on AC induction motors.

What would you do to change the volume of gas?

Answers


The only way to do that is to reduce the
volume of the container the gas is in.

13 points!When we see colors, it is because light is reflected off objects back to our eyes. Different colors are due to the different _____________ of the light.












A)
amplitudes



B)
wave speeds



C)
wavelengths



D)
polarization

Answers

Different colors after reflection appear due to the different wavelengths of light. Therefore, option C is correct.

What are frequency and wavelength?

The wavelength of the light can be defined as the distance between the two points in phase w.r.t. each other such as two crests or troughs on a wave. The frequency of the light is the number of oscillations of a wave in one second and has S.I. units of per second or hertz.

The expression between frequency (ν), wavelength (λ), and speed of light (c) is:

c = νλ

A wave moving at a fixed wave speed has a wavelength that is inversely proportional to the frequency therefore, the waves with higher frequencies have shorter wavelengths, while lower frequencies have higher wavelengths.

The speed depends upon the medium as it propagates. In particular, the speed of light in a particular medium is less than in a vacuum, therefore the same frequency will have a shorter wavelength.

When the light is reflected the colors are formed as due to different wavelengths.

Learn more about wavelength and frequency, here:

brainly.com/question/18651058

#SPJ6
The color is determined by the c) wavelength of light

Physical science tries to a. Survey all of science b. Describe the environment and interaction between living things c. Describe matter and energy and the relationship between matter and energy d. Describe rocks minerals and resources

Answers

Answer:

option "c" is correct

Explanation:

Physical science or Physics is the study of matter, energy and their mutual relationship.
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