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3 years ago

11

Using moving water to produce electricity is an example of _____.

1 answer:

denis-greek [22]3 years ago

8 0

Using moving water to produce electricity is an example of changing one form of energy into another form of energy.

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Calculate the amount of work done if you use a 100 N force to push a 50 kg box 5 m across the kitchen floor.

gogolik [260]

Work = force * distance
force = 100 N
Distance = 5m
work =100 N* 5m
=500 J

3 0

2 years ago

Read 2 more answers

The ________ is located inside the outdoor condenser unit and receives the low-pressure refrigerant vapor through the suction li

dusya [7]

Answer:

Compressor

Explanation:

Compressor - the compressor is a unit that placed at the inner side of the condenser. The main function of the compressor is to increase the pressure by reducing the volume of air. And this reduced volume of air is compressed for the cleaning purpose of the air tube. While condenser is used for heat exchange which converts steam into liquid form.

It is advisable not to operate the compressor when the outside temperature is below 65 degrees F.

6 0

2 years ago

Determine the amount of time for polonium-210 to decay to one fourth its original quantity. The half-life of polonium-210 is 138

ira [324]

Answer: 276 days

Explanation:

This problem can be solved using the Radioactive Half Life Formula:

$A=A_{o}.2^{\frac{-t}{h}}$ (1)

Where:

$A=\frac{1}{4}A_{o}$ is the final amount of the material

$A_{o}$ is the initial amount of the material

$t$ is the time elapsed

$h=138 days$ is the half life of polonium-210

Knowing this, let's substitute the values and find $t$ from (1):

$\frac{1}{4}A_{o}=A_{o}2^{\frac{-t}{138 days}}$ (2)

$\frac{A_{o}}{4A_{o}}=2^{\frac{-t}{138 days}}$ (3)

$\frac{1}{4}=2^{\frac{-t}{138 days}}$ (4)

Applying natural logarithm in both sides:

$ln(\frac{1}{4})=ln(2^{\frac{-t}{138 days}})$ (5)

$-1.386=-\frac{t}{138days}ln(2)$ (6)

Clearing $t$ :

$t=276days$ (7)

7 0

2 years ago

A 0.013 rubber stopper attached to a 0.93 string is swung in a circle if the tension in the string is 0.35 what is the period of

emmainna [20.7K]

Answer: 0.45..............

6 0

2 years ago

The frequency of a wave is 1) A) measured in cycles per second. B) measured in hertz (Hz). C) the number of peaks passing by any

7nadin3 [17]

Answer: E) all of the above

Explanation:

Frequency is the number of vibrations in one second. It is also defined as the number of crests that pass a point in a given time.

The frequency and the wavelength has an inverse relationship.

Frequency is measured in cycles per second or Hertz(Hz).

The relationship between wavelength and frequency of the wave follows the equation:

$\nu=\frac{c}{\lambda}$

where,

$\nu$ = frequency of the wave

c = speed of light

$\lambda$ = wavelength of the wave

Thus all the given statements are true.

6 0

3 years ago