PHYSICS MIDDLE SCHOOL

As the bell rings, which energy transformation occurs? A. Mechanical energy is converted into sound energy. B. Chemical energy is converted into heat energy. C. Mechanical energy is converted into heat energy. D. Chemical energy is converted into sound energy.

Answers

Answer 1

Answer:

Answer:

A) Mechanical energy is converted into sound energy.

Explanation:

Answer 2

Answer:

Answer:

Mechanical Energy.

Explanation:

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Oxidation in a sentence

Answers

Oxidation is the loss of electrons.

5. Is it likely that light with frequencies higher than ultraviolet wasthe main cause of Tía Ana’s cataracts? Explain why or why not.

Answers

Answer: YES

Explanation:

If Tia Ana exposes her eyes to light ray in which it frequency is higher than ultraviolet ray, it may result to a gradual eyes issue such as cataracts as the radiation damages the cornea and the lens in front of the eyes.

A Carnot heat engine has an efficiency of 0.400. If it operates between a deep lake with a constant temperature of 298.0k and a hot reservoir, what is the temperature of the hot reservoir?

Answers

Answer:

496.7 K

Explanation:

The efficiency of a Carnot engine is given by the equation:

$\eta = 1 - (T_H)/(T_L)$

where:

$T_H$ is the temperature of the hot reservoir

$T_C$ is the temperature of the cold reservoir

For the engine in the problem, we know that

$\eta = 0.400$ is the efficiency

$T_C = 298.0 K$ is the temperature of the cold reservoir

Solving for $T_H$ , we find:

$(T_C)/(T_H)=1-\eta\nT_H = (T_C)/(1-\eta) =(298.0)/(1-0.400)=496.7 K$

The slope of the line on a speed-time graph tells the speed.Please select the best answer from the choices provided

T
F

Answers

From the choices provided, the better answer is ' T ' .

What's the difference between the movement of particles in liquid and the movement of particles in gases

Answers

liquids move freely and slide past each other while gases move in zig zag motions not sliding past each other at all they're all over the place

Gas is like just air, but liquid, is water. Water, moves quickly, when, air just kind of like moves like in a weird way, like if you see it move over hot tea, that is how it would look like. So, that should help you, have a great day!

Which describes the properties reflection, absorption, and transmission when a light is shinning on the oval end of a silver spoon?A.
It reflects a lot of light, transmits almost no light, and absorbs some light.

B.
It reflects some light, transmits some light, and absorbs no light.

C.
It reflects all light, transmits all light, and absorbs some light.

D.
It reflects almost no light, transmits almost no light, and absorbs almost no light.

Answers

Which describes the properties reflection, absorption, and transmission when a light is shinning on the oval end of a silver spoon?The correct answer is C. It reflects all light, transmits all light, and adsorbs some light.
Hope I helped, and good luck!

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A 50-kg ice skater is holding a 3-kg ball, moving at a steady +5 m/s. She then throws the ball backwardsat -10 m/s, if so what would her final velocity be?