PHYSICS MIDDLE SCHOOL

true or false the state of a medium helps determine the speed of sound passing through a medium

Answers

Answer 1
Answer: True. If a medium such as H2O is in ice form, sound can not pass through it as well as if it were water or water vapor

Related Questions

Eva is in a closed, dark room. She uses her arm muscles to turn on a lamp. When she moves her hand closer to the lamp, the light heats her hand. The light bounces off the pages of a book and into her eyes.If this room is a closed system, what happens to the total amount of energy in the room? A. It remains constant. B. It decreases. C. It increases, then decreases. D. It increases.
What type of reaction occurs when you strike a match?
near the earth surface the amount of mass an object has does not affect its acceleration due to gravity
Where do most water molds and downy wildews live?
You leave a light on in your house for 10 minutes (600 seconds). The lightbulb draws 0.5 amps at 120 volts. What is the power rating of the lightbulb and how much energy is consumed in the 10 minutes?

What kind of image is formed by a convex lens when the object is less than a focal length away from the object?A) an image that is always smaller than the object

B) none, because the lens is too close to the object

C) a virtual image

D) an inverted real image

Answers

Answer:

C

Explanation:

An object that is less than a focal length from a convex lens forms a virtual, magnified image. When the object is closer to a convex lens than the focal point, its rays do not pass through the focal point to form an image on the opposite side of the lens.

2. When the pump removed the air in
the bell, the balloon
contracted
expanded

Answers

When the pump removed the air in  the bell, the balloon expanded.

Option: B

Explanation:

In order to construct our own environment in the glass jar known as bell jar system, which can be used to explore and consider our larger environment on Earths, for an instance. Here a glass jar that hinges on an airtight rubber basis i.e seals appropriately. At the top of the jar, a bung is connected to it which passed via a metal tube. It has an adjacent flexible tube that goes to a hand vacuum pump and the best hand-powered pump was made with a wine preserver.

When the pump extracts the air from the bell jar, the pressure inside the balloon naturally decreases. The balloon usually has a air pressure around it, which restricts its size, but when this air is extracted and the pressure around it decreases the gas in the balloon will expand and the balloon seems to be inflating. When you release the air back into the bell jar, it will once again compress back to its actual size.

The Earth belongs to the group of rocky planets that orbits between the sun and the asteroid belt. Place these planets in order, starting closest to the sun. A) Mercury-Earth-Venus-Mars B) Mercury-Venus-Earth-Mars C) Mercury-Venus-Earth-Saturn D) Venus-Mars-Earth-Jupiter

Answers

B. Mercury-Venus-Earth-Mars

Answer:

B. Mercury-Venus-Earth-Mars

Explanation:

What could you do to change the volume of a gas?

Answers

The ONLY way to change the volume of a sample of gas is to transfer it to a container with different volume.
Simply changing its temperature or pressure in the same jar won't do it. Any amount of gas always fills whatever container you keep it in.

17. Which of the following is the closest weight in newtons of a 7.0-kilogrambowling ball? *
A. 7.0 newtons
B. 70 newtons
C. 700 newtons
d. 7000 newtons

Answers

Weight = (mass) x (gravity)

Weight = (7.0 kg) x (gravity)

On Earth, where (gravity) is roughly 10 N/kg . . .

Weight = (7.0 kg) x (roughly 10 N/kg)

Weight = roughly 70 Newtons

That's B on Earth.

It would be some other number on other bodies.

All of the following are benefits to getting involved with activities outside of school except

Answers

Answer:

A disadvantage of getting involved in activities outside the school can be lack of time to other important activities.

Explanation:

For example, the time used for others activities, can be used to make homeworks, study, spent time with the family and friend, sleep the recommended amount of time.

But it´s important to have a balance in the use of time a take profit of every moment, balancing our likes with our responsibilities.
I am not sure but I think the answer is b
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A class of students is modeling how waves propagate through a medium. Each student in the class represents particle in the medium. An envelope represents the energy transferred by the wave. Which of the following scenarios would accurately model a wave propagating from one side of the room to the other?