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4 years ago

What is an example of electrons moving?

Physics

1 answer:

alexgriva [62]4 years ago

7 0

C . because if you do it phisical you can see that it works

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Which best describes solubility? the speed at which a substance dissolves the ability of one substance to dissolve in another th

ycow [4]

Answer:

The ability of a substance to dissolve into another, called the solvent.

Explanation:

That is why water is called "the universal solvent."

Because it can dissolve almost anything.

The speed and temperature have nothing to do with solubility.

4 0

2 years ago

It takes 8 seconds for a pulley system to lift a load that weights 400N to a height of 10 m. How much power is required?.

mariarad [96]

Answer:

C. 500 watts

Explanation:

power is defined as the rate of work done

$power=\frac{work.done}{time}$

When a force causes a object to move, work is being done on the object by the force.

$work.done=force*displacement\\=400*10\\=4000J$

$power=\frac{4000J}{8s}\\=500 W$

3 0

4 years ago

An RV is traveling 60 km/h along a highway. A boy sitting near the driver of the RV throws a ball to another boy at the back end

alina1380 [7]

Answer:

Speed of the ball relative to the boys: 25 km/h

Speed of the ball relative to a stationary observer: 35 km/h

Explanation:

The RV is travelling at a velocity of

$v_{RV}=+60 km/h$

Here we have taken the direction of motion of the RV as positive direction.

The boy sitting near the driver throws the ball back with speed of 25 km/h, so the velocity of the ball in the reference frame of the RV is

$v_B = -25 km/h$

with negative sign since it is travelling in the opposite direction relative to the RV. Therefore, this is the velocity measured by every observer in the reference frame of the RV: so the speed measured by the boys is

v = 25 km/h

Instead, a stationary observer outside the RV measures a velocity of the ball given by the algebraic sum of the two velocities:

v = +60 km/h + (-25 km/h) = +35 km/h

So, he/she measures a speed of 35 km/h.

5 0

3 years ago

I need help!!!!!!!

wlad13 [49]

One simple use of the elements of the electromagnetic spectrum that we use during our everyday lives is our daily use of microwave radiation. microwave radiation is absorbed by water molecules which heats up and cooks the food whilst killing bacteria. Another would be ultraviolet radiation which we use daily in things such as light bulbs. The sun also uses this. Lastly, we use radio waves constantly. May it be tv programs, radio, or our cell phones.

4 0

3 years ago

Endothermic reactions give off heat as they proceed. a. True b. False

Temka [501]

B. False
Endothermic reactions absorb heat.

5 0

3 years ago