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3 years ago

15

How is energy harnessed to do useful work?

1 answer:

baherus [9]3 years ago

8 0

Answer:

But there are ways to harness kinetic energy to either generate useful mechanical work or electricity. This is what many have tried to do to make use of energy that would be otherwise wasted. One way to harness kinetic energy that has popped up many times in recent years has to do with roads and speed bumps

Explanation:

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a point charge q is located at the center of a cube with edge length d. whatis the value of the flux over one face of the cube

Gekata [30.6K]

Answer:

q/6Eo

Explanation:

See attached file pls

5 0

3 years ago

a baseball is pitched with a speed of 35.0m/s. how long does it take the ball to travel 18.4 m from the pitchers mound to home p

Vlad [161]

Given the speed and the distance, to find time you can use the formula speed is equal to distance over time. From there you can manipulate the equation for time to equal the distance divided by speed. Time is equal to 18.4 meters divided by 35m/s which equals 0.526 seconds.

7 0

3 years ago

An electron is in a vacuum near Earth's surface and located at y = 0 m on a vertical y axis. At what value of y should a group o

Bingel [31]

Answer:

the bunch of 23 electrons must be placed on y axis at coordinate y = - 24.35 m.

Explanation:

As we know that the gravitational force on electron at y = 0 is counter-balanced by the weight of the electron

So we have

$\frac{kq_1q_2}{r^2} = mg$

here we have

$q_1 = e$

$q_2 = 23 e$

$m = 9.11 \times 10^{-31} kg$

also we know that

$e = 1.6 \times 10^{-19} C$

so we will have

$\frac{(9\times 10^9)(1.6 \times 10^{-19})(23\times 1.6 \times 10^{-19})}{r^2} = (9.11 \times 10^{-31})(9.81)$

$\frac{5.3 \times 10^{-27}}{r^2} = 8.94 \times 10^{-30}$

$r = 24.35 m$

so the bunch of 23 electrons must be placed on y axis at coordinate y = - 24.35 m.

7 0

3 years ago

. If an 8 N force pulled a 3.0 kg object to the left and a 5 N force pushed it to the right,

maxonik [38]

Answer:

8-5=3

The bigger force is to the left

3N to the left

Explanation:

7 0

1 year ago

a school bus takes 0.50 hours to reach the school from your home. if the average speed of the bus is 20km/h, what is displacemen

Kazeer [188]

Answer:

10 km

Explanation:

.5 hr * 20 km/hr = 10 km

8 0

1 year ago