Work is the transfer of _______ that occurs when a force makes an object move.

when you stretch a spring 13 cm past it's natural length, it excerts a force of 21 N. What is the spring constant of this spring

Semmy [17]

Formula

F = k*x

Givens

F = 21 N

x = 13

K = ?

Solution

21 = 13 k

21/13 = k

k = 1.615 N / cm

The units are not quiet the ones you should be using. Newtons are found in the mks system.

13 cm [1 m / 100 cm ] = 0.13 m

So an alternate solution is

21 N = k * 0.13 m

k = 21 N / 0.13 m

k = 161.5 Newtons / meter. Answer

7 0

4 years ago

As an object slides across a rough horizontal

tiny-mole [99]

When the object slides across the rough surface some of its potential energy will be lost to friction.

<h3>Conservation of mechanical energy</h3>

The law of conservation of mechanical energy states that the total mechanical energy of an isolated system is always constant.

M.A = P.E + K.E

When the object slides across the rough surface, some of the potential energy of the object will be converted into kinetic energy while the remaining potential energy will be converted into thermal energy due to frictional force of the rough surface.

P.E = K.E + thermal energy

Learn more about conservation of energy here: brainly.com/question/166559

6 0

2 years ago

A rigid, nonconducting tank with a volume of 4 m3 is divided into two unequal parts by a thin membrane. One side of the membrane

kondor19780726 [428]

The final temperature of the system will be equal to the initial temperature, and which is 373K. The work done by the system is 409.8R Joules.

To find the answer, we need to know about the thermodynamic processes.

<h3>How to find the final temperature of the gas?</h3>

Any processes which produce change in the thermodynamic coordinates of a system is called thermodynamic processes.
In the question, it is given that, the tank is rigid and non-conducting, thus, dQ=0.
The membrane is raptured without applying any external force, thus, dW=0.
We have the first law of thermodynamic expression as,

$dU=dQ-dW$

Here it is zero.

$dU=0$ ,

As we know that,

$dU=C_pdT=0\\\\thus, dT=0\\\\or , T=constant\\\\i.e, T_1=T_2$

Thus, the final temperature of the system will be equal to the initial temperature,

$T_1=T_2=100^0C=373K$

We found that the process is isothermal,
Thus, the work done will be,

$W=RT*ln(\frac{V_2}{V_1} )=373R*ln(\frac{4}{\frac{4}{3} })\\ \\W=409.8R J$

Where, R is the universal gas constant.

<h3>What is a reversible process?</h3>

Any process which can be made to proceed in the reverse direction is called reversible process.
During which, the system passes through exactly the same states as in the direct process.

Thus, we can conclude that, the final temperature of the system will be equal to the initial temperature, and which is 373K. The work done by the system is 409.8R Joules.

Learn more about thermodynamic processes here:

brainly.com/question/28067625

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7 0

2 years ago

Read 2 more answers

Which of the following statements about ice melting is true?

zaharov [31]

I think the answer would be b

3 0

3 years ago

Read 2 more answers

As a sample of water is heated, the kinetic energy of its molecules increases. Then, the energy is used to overcome the attracti

maks197457 [2]

Answer: SECTION B (BOILING POINT)

Explanation: Boiling point (100°c)

This is the point in which the water molecules acquires sufficient kinetic energy to overcome the attraction binding them.(a point at which a liquid will boil).

When a liquid example water is heated to it's boiling point,there is a rapid vaporization,this is known as boiling.At this boiling point,the temperature of the vapour pressure of the liquid will be directly proportional to the pressure exerted on the liquid by the sorounding atmosphere.

7 0

3 years ago