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3 years ago

A block of wood has a height of 10 m, a length of 2 m, and a width of 2 m. What is the volume of the block of wood?

Physics

1 answer:

Galina-37 [17]3 years ago

3 0

Answer:

40 cubic meters

Explanation:

To find the volume of a rectangular prism you need to use the formula:

Length x Width x Height = Volume

(2) x (2) x (10) = Volume

(4) x (10) = Volume

Volume = 40 cubic meters

~Hope this helps!~

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Dissolving common salt in water is physical or chemical change?

Ipatiy [6.2K]

Answer: Physical

Explanation: There are no changes being done to the salt. Think of it this way, if you dissolve the salt in water then boil the water completely, you will have the same salt you started with.

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3 years ago

What type of energy conversion results when friction slows down a ball rolling across the floor

ale4655 [162]

Friction between the ball and the floor is stealing some of the kinetic energy of the ball, and turning it into heat.

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2 years ago

You just calibrated a constant volume gas thermometer. The pressure of the gas inside the thermometer is 286.0 kPa when the ther

diamong [38]

Answer:

$T_{2} = 606.69 K$

Explanation:

In that the gas thermometer is a constant volume, it is satisfied that:

$\frac{P_{1} }{T_{1} } = \frac{P_{2} }{T_{2} }$

How the boiling water is under regular atmospheric pressure, then

$T_{1} = 373 .15 K$

Thus

$\frac{286000}{373.15} = \frac{465000}{T_{2} }$

$T_{2} = 606.69 K$

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2 years ago

The positron created in pair production travels a certain distance and loses all of its kinetic energy. It finally annihilates w

hichkok12 [17]

Answer:

In pair production, after the loss of Kinetic energy, the angular separation between the two photons is 180°.

Explanation:

Pair production is the process of formation of two electrons, one negative and the other positive (positron), from a pulse of electromagnetic energy traveling through matter.

It is a process of direct conversion of radiant energy to matter.

The sum of the Kinetic energies of the formed particles amounts to a value of 4 MeV.

When the kinetic energy is lost, emission of two photons, each with an energy of approximately 1 MeV in the form of gamma rays takes place ( in opposite direction).

Therefore, the angle of separation between the two photons is 180°.

Learn more about electromagnetic energy here:

<u>brainly.com/question/9221254</u>

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7 0

1 year ago

How does changing the lengthy but not the height of an inclined plane affect the work done to lift a load? PLZ HELP ME NOW'

Serhud [2]

Answer: Work Done would remain same.

Let us assume that the velocity is constant while taking the load up the inclined plane. Then, the kinetic energy would remain the same. This is because kinetic energy is dependent on velocity $(K.E.=\frac{1}{2}mv^2)$ . If that is constant, the kinetic energy would remain same. The potential energy is dependent on the height $(P.E.=mgh)$ . If the height is changed, then potential energy varies. In the question, it is mentioned that without changing the height, the length of the inclined plane is changed. Therefore, the potential energy would be same as before.

We know, work done is equal to potential energy plus kinetic energy. Since there is no change in any of these, the required work done would not change.

4 0

3 years ago