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2 years ago

12

Short essay Question

2 answers:

Reptile [31]2 years ago

6 0

<h2>Hello! :)</h2>

Answer:

In wind turbines, the blades rotate due to the wind.

Explanation:

In wind turbines, the blades rotate due to the wind.<u> While the blade rotates the generator connected to it also rotates.</u> Thus the <u>kinetic energy from the wind initiates the electric generator which in turn produces the electricity.</u>

Thus the<u> kinetic energy of the wind is converted to electricity.</u>

<u></u>

Hope this helps!

Have a Wonderful Friday!

-Good Luck on your Homework- :)

Mademuasel [1]2 years ago

3 0

Wind turbines and the blades rotate due to the air of the wind.

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A ball of 0.5kg slows down from 5m/s to 3m/s. Calculate the work done inthe process.

dlinn [17]

Answer:

9.8 Joules (rounded to 2 significant figures)

Explanation:

Work done (J)= Force(N) x distance changed (m)

Force= 9.80665 x 0.5kg
Force= 4.90332 Newtons

Distance changed= 5-3
distance changed= 2m/s

--> work done= 4.90332 x 2

work done= 9.8 Joules

5 0

2 years ago

is the thermal energy transferred in a refrigerator primarily by conduction,convection or radiation? explain your answer

irinina [24]

Answer: Convection

Explanation: convection is the most present process in the refrigeration equipment you may deal with. It occurs mainly in the fluids

6 0

3 years ago

Question in picture.

Gelneren [198K]

<h2>Hello!</h2>

The answer is: A. 19.3 joules

<h2>Why?</h2>

Since it's an elastic collision, the kinetic energy after and before the collision will be the same.

Kinetic energy can be calculated using the following equation:

$KE=\frac{1}{2}mv^{2}$

Where:

$KE=KineticEnergy\\m=mass\\v=velocity$

So,

First object, (going to the right):

$m=7.20kg\\v=2\frac{m}{s}$

$KE_{1}=\frac{1}{2}*7.20Kg*(2\frac{m}{s})^{2}=14.4Joules$

Second object:, (going to the left):

$m=5.75kg\\v=-1.30\frac{m}{s}$

$KE_{2}=\frac{1}{2}*5.75kg*(-1.30\frac{m}{s})^{2}=4.86Joules$

Remember,

$1Joule=1Kg.\frac{m^{2}}{s^{2} }$

Hence,

The total kinetic energy after the collision will be:

$T=KE_{1}+KE_{2}=14.4Joules+4.86joules=19.26joules=19.3joules$

The total kinetic energy after the collision is 19.3 joules (rounded to the nearest tenth)

Have a nice day!

6 0

3 years ago

Speed that does not change is known as the:

svetoff [14.1K]

Answer: Final speed

Explaination: because its final.

4 0

3 years ago

Read 2 more answers

I need help plzzz 10 points

Yakvenalex [24]

<u>D. 475 </u>

Explanation:

The numbers do not increase much more then this, so it must be the max

3 0

3 years ago

Read 2 more answers