Which device is using a motor?A water heater creates heat energy from electric energy.

A waterfall rotates a waterwheel to turn an axle.

A body massager uses electric energy to move back and forth.

A solar charger creates electric energy from the Sun.

Answers

Answer 1
Answer: Out of all the options, only body massager which uses electric energy to move back and forth is using motor here. It is because a motor converts electrical energy to Mechanical energy and only massager obeys it among all the options.

In short, Your Answer would be Option C

Hope this helps!
Answer 2
Answer:

Answer:  C.

A body massager uses electric energy to move back and forth.

Explanation:


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A police car is traveling at a velocity of 18.0 m/s due north, when a car zooms by at a constant velocity of 42.0 m/s due north. After a reaction time of 0.800 s the policeman begins to pursue the speeder with an acceleration of 5.00 m/s2. Including the reaction time, how long does it take for the police car to catch up with the speeder?
Which event can be excluded from a list of interactions among Earth's spheres?A solar flaresB volcanic eruptionC fracking for natural gasD hurricane

A geologist finds a layer of rock that is coarse-grained granite.What type of rock did the geologist find?


A.extrusive igneous rock


B.intrusive igneous rock


C.foliated metamorphic rock


D.nonfoliated metamorphic rock

Answers

The right answer for the question that is being asked and shown above is that: "B.intrusive igneous rock." A geologist finds a layer of rock that is coarse-grained granite. The type of rock that the geologist find is an intrusive igneous rock.

The distance from one Crest to the next cest is the

Answers

Hi


The distance from one Crest to the next crest is the wavelength


I hope that's help !

50 J of work was performed in 20 seconds. how much power was used to do this task?

Answers


             Power = (amount of work done) / (time to do the work).

                         =                    (50 J)          /        (20 sec)

                         =      2.5 joule/sec  =  2.5 watts .

The Correct answer to this question for Penn Foster Students is: 2.5 W

If (on earth) an object falls 18m and loses 36J of GPE. What is the objects mass?

Answers

The gravitational potential energy of the object falling from 18 m height is 36 J. Thus, its mass is 0.2 Kg.

What is gravitational potential energy?

Gravitational potential energy of an  object is the energy generated by virtue of its position in a gravitational field. The magnitude of gravitational potential energy is directly proportional to the mass of the object , height from the surface and the acceleration due to gravity.

GPE = mgh

The height of the object falling = 18 m

Gravitational potential energy = 36 J

Acceleration due to gravity in earth = 9.8 m/s².

Mass of the object = GPE/ (gh)

                               = 36 J/ (18 m×9.8 m/s² )

                               = 0.20 Kg.

Therefore, the mass of the object is 0.20 Kg.

To find more on gravitational potential energy, refer here:

brainly.com/question/19768887

#SPJ2

PE=mgh
Where 'g' is the gravitational constant (9.81 m/s^2)
If you're solving for m, you can change the equation to be (PE/gh)=m.
m=(36J/18m*9.81m/s^2)
m=.2kg


When you calculate the SLOPE of a line segment, what does the SLOPE represent? (Choose all that apply) the Distance traveled the Displacement the Velocity the Acceleration None of the above

Answers

Answer:

Please find the answer in the explanation

Explanation:

When you calculate the SLOPE of a line segment, what does the SLOPE represent? (Choose all that apply) the Distance traveled the Displacement the Velocity the Acceleration None of the above

The slope of any time graph can not give you distance or displacement except for position - time graph.

When you plot either distance or displacement against time, that is, distance time graph or displacement time graph, you can get speed or velocity as the slope of the line segment.

You can only acceleration as a slope in a line of best fit if velocity is plotted against time. That is, in a velocity time graph.

The blue end of the visible color spectrum has wavelengths, and the red end has wavelengths.

Answers

Answer: Blue end has shorter wavelength and red end has longer wavelengths.

Explanation:

Visible region consists of Violet, Indigo, Blue, Green, Yellow, Orange and Red. These colors are arranged in the order of increasing wavelengths which means that blue region has shorter wavelength and as we move towards red region, the wavelength of light increases.

Blue region has shorter wavelength and higher frequency whereas red region has longer wavelength and smaller frequency.

Frequency and wavelength follow inverse relation.

\nu\propto (1)/(\lambda)

Answer: Blue end has shorter wavelength and red end has longer wavelengths.