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Sonbull [250]
3 years ago
12

Unlike other types of alternative energy, geothermal energy cannot be used to create electricity. true or false.

Physics
2 answers:
vaieri [72.5K]3 years ago
6 0
It's false because in some countries it's used to make power.
Irina18 [472]3 years ago
6 0

Answer:

FALSE

Explanation:

Geothermal energy can be use to form electricity like other sources of energy.

In this case of geothermal energy first of all steam is produced with the help of thermal energy recovered by the geothermal energy. This steam is taken to high pressure which is used to operate the turbine.

Now this turbine will convert the mechanical energy received by steam into electrical energy.

So here this type of energy sources are used in several countries for the electricity production

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A solid sphere of weight 42.0 N rolls up an incline at an angle of 36.0°. At the bottom of the incline the center of mass of the
Alecsey [184]

Answer:

Part a)

KE = 77.95 J

Part b)

L = 3.16 m

Part c)

distance L is independent of the mass of the sphere

Explanation:

Part a)

As we know that rotational kinetic energy of the sphere is given as

KE = \frac{1}{2}I\omega_2 + \frac{1}{2}mv^2

so we will have

KE = \frac{1}{2}(\frac{2}{5}mR^2)(\frac{v}{R})^2 + \frac{1}{2}mv^2

so we will have

KE = \frac{1}{5} mv^2 + \frac{1}{2}mv^2

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KE = \frac{7}{10}(\frac{42}{9.81})(5.10^2)

KE = 77.95 J

Part b)

By mechanical energy conservation law we know that

Work done against gravity = initial kinetic energy of the sphere

So we will have

mgLsin\theta = KE

\frac{42}{9.81}(9.81)L sin36 = 77.95

L = 3.16 m

Part c)

by equation of energy conservation we know that

\frac{7}{10}mv^2 = mgL sin\theta

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3 years ago
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