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3 years ago

Device diel lesu

Physics

1 answer:

fgiga [73]3 years ago

7 0

Answer:

Example Item Description of potential-kinetic energy conversion

Example Book The book had potential energy when it was on the table. Then as the book fell off the table, it was in motion and had kinetic energy.

1 ball The ball had potential energy because it was in one place. Then it rolled off the counter and it was kinetic energy.

2 Paper airplane The airplane was sitting on the table in had potential energy until I picked it up and threw it which made it kinetic energy.

3 Chips Chips were in the closet sitting on the shelf which is potential energy and one fell of the shelf which made it kinetic energy.

4 Clock I put my clock on the wall which is potential energy and then a few days later it fell off which is kinetic energy.

5 water I had water sitting in a cup which is potential energy the I grabbed it and spilled which makes the water kinetic energy.

Explanation:

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artcher [175]

B- V and R are directly proportional to eachother

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4 years ago

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What other places in the world use hydro kinetic energy to generate electrical power?

Elina [12.6K]

Answer:

Alaska: Hydrokinetic Energy Campbell CR9000X used for in-stream hydrokinetic device evaluation. Marine hydrokinetic energy power generation is an emerging sector in the renewable energy portfolio. Hydrokinetic devices convert the energy of waves, tidal currents, ocean currents or river currents into electrical power.

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4 years ago

A student wishes to record a 7.5-kilogram watermelon colliding with the ground. Calculate how far the watermelon must fall freel

algol [13]

Answer:

42.86m

Explanation:

The first thing we should keep in mind is that the watermelon moves with uniform acceleracion equal to gravity (9.81m / s ^ 2)

A body that moves with constant acceleration means that it moves in "a uniformly accelerated motion", which means that if the velocity is plotted with respect to time we will find a line and its slope will be the value of the acceleration, it determines how much it changes the speed with respect to time.

When performing a mathematical demonstration, it is found that the equations that define this movement are as follows.

$\frac {Vf^{2}-Vo^2}{2.g} =Y$

where

Vf=29m/s= final speed

Vo= initial speed=0m/S

g=gravity=9.81m/s^2

Y= distance traveled(m)

solving

$\frac {Vf^{2}-Vo^2}{2.g} =Y\\\frac {(29m/s)^{2}-(0m/s)^2}{2(9.8m/s^2)} =Y\\Y=42.86m\\$

the distance traveled by watermelon is 42.86m

5 0

4 years ago

PLEASE HELP 15 POINTSexplain properties and importance of light and how it separates into colors

Inessa05 [86]

Answer:

It is not a property of light. It is your eyes and brain.

Specifically, the three kinds of cone cells in our eye that are sensitive to different ranges of the electromagnetic spectrum. The fact that there are three means that color is three dimensional, and is the reason the pure colors form a circle even though the spectrum of wavelengths is linear.

Visible light is part of the electromagnetic spectrum; light waves of different frequencies and wavelengths are distinguished as colors by the human eye. A prism can separate the colors of white light (dispersion) because different frequencies of light have different refractive indices for a given material.

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3 years ago

A radioactive substance decays at an annual rate of 131313 percent. If the initial amount of the substance is 325325325 grams, w

anyanavicka [17]

Answer: $f_{(t)}=325(0.87)^{t}$

Explanation:

If we have an initial amount of a radioactive material or substance, which is $325g$ , and we also are told this amount decays $13\%$ each year, this means each year $87\%$ of the substance remains: