PHYSICS MIDDLE SCHOOL

The reason a filter system is used in this experiment is to separate and collect in the reaction.

Answers

Answer 1
Answer:

Answer: the solid copper

Explanation: 2020 edge
Answer 2
Answer:

Answer:

the solid copper.

Explanation:

correct on edge 2021

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Melanie watched the path a baseball followed after a pitcher threw it. She noticed that the ball traveled horizontally away from the pitcher as well as downward toward the ground. What force caused the ball to accelerate in the downward direction when it was thrown?

When does new characteristics appear before?

Answers

New characteristics appear before the character speaks for the first time .


I hope that's help !

I need help on #9 (it's side ways sorry...)

Answers

All of these are directly proportional to each other, meaning that if one goes up or down, they all do the same.
So if the temperature increases so does the heat. If the heat increases then so does the thermal energy. If the temperature goes up then so does the thermal energy. ETC...
Temperature-Amount of heat or coldness an item has measured in degrees. the object.
Heat- Given off from thermal energy.
Thermal energy- what is given off when energy is lost.
Law of Conservation of Energy- Energy can neither be created or destroyed, it can only be transformed from one form to another.

student built a simple heat engine that could lift masses. If the heat engine takes in 300 J of heat and loses 50 J to the environment, how much height will it lift a 1.5 kg mass?

Answers

Answer:

So it will lift the mass by h = 17 m

Explanation:

As per energy conservation we know that

Q_1 = W + Q_2

here we know that

Q_1 = 300 J

Q_2 = 50 J

now we have

W = 300 - 50

W = 250 J

so work done by the engine is 250 J

now we have

W = mgh

250 = 1.5 * 9.81 * h

h = 17 m

What are 4 things that can happen to a light wave when it hits an object?

Answers

Explanation:

The four things that can happen to a light wave when it hits an objects are :

1. Reflection : The bouncing back of light when the light wave strikes on a surface is called reflection of light.

2. Refraction : The bending of light when the light wave moves from one medium to another.

3. Absorption : Absorption is the process in which the light wave do not reflect back. It stays inside the material.

4. Transmission : Transmission of light is the process in which light wave goes continuously straight.

Some other process that are shown by a light wave are polarization, scattering etc.

Final answer:

When a light wave hits an object, it can undergo reflection, transmission, absorption, or scattering.

Explanation:

When a light wave hits an object, several things can happen:

  1. Reflection: The light wave can bounce off the object, changing its direction but maintaining its frequency and speed.
  2. Transmission: The light wave can pass through the object, with some of the wave being absorbed and some being transmitted.
  3. Absorption: The light wave can be absorbed by the object, converting its energy into heat.
  4. Scattering: The light wave can be scattered in different directions by the object, leading to a change in the overall direction of the wave.

Learn more about Light wave interactions with objects here:

brainly.com/question/12466679

#SPJ6

When the compound Na2S forms what happens to the Na and S ions

Answers

nothing, ATOMS lose or gain electrons to become IONS 
Two Na ATOMS lose 1 electron each and 1 S ATOM gains 2 electrons 
Since sodium ions each have a single positive charge (lacking one electron in its valence orbital) and sulfur ions each have a 2- charge (having two extra electrons in its valence orbital), the compound Na2S forms when two sodium ions are ironically bound to a central sulfur.

If a machine could be made that had 100% mechanical efficiency, it would be called an _____________________________.

Answers

It would OUTPUT exactly enough energy to pour back into its INPUT and
keep itself running.  It would be called an "Perpetual Motion" machine.

It would be completely useless, however, as anything but a curiosity
to be stared at.  If you ever tried to make it actually DO anything besides
keep itself running, it would run down and stop, because you had taken
energy out of it.

What you need in order to turn the world upside down is a machine that
has 101% mechanical efficiency ... enough energy coming out of it to
keep itself running AND have a little bit left over, that you can take and
do other things with.

Such a machine would need to create energy inside itself, which
everybody knows is not possible.
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