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mars1129 [50]
3 years ago
12

The Earth’s internal __________ source provides the energy for our dynamic planet, providing it with the driving force for on-go

ing disastrous events such as earthquakes and volcanic eruptions and for plate-tectonic motion.
A).heat
B).metallic
C).magnetic
D).gravity
Physics
2 answers:
jeka943 years ago
7 0
Heat source is the answer
alexira [117]3 years ago
6 0

Answer:

A). Heat

Explanation:

Inside the Earth, the primordial heat left from the formation of Earth and the decay of radioactive isotopes in the crust and the mantle are the sources of flow of heat. This interior source of heat is responsible for the motion of the plates which leads to Earthquakes and volcanic eruptions. Internal heat is also used as a source of energy - geothermal energy for heating and cooking.

Thus, the Earth’s internal <u>heat </u>source provides the energy for our dynamic planet, providing it with the driving force for on-going disastrous events such as earthquakes and volcanic eruptions and for plate-tectonic motion.

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A motorcycle slows down uniformly from a speed of 21 m/s to rest in 6.0s. How far did it travel during this time?
Verizon [17]

Answer:

63 m

Explanation:

The initial velocity of the motorcycle is

v_i = 21 m/s

The final velocity is

v_f = 0

And the time taken is

t=6.0 s

Since the acceleration of the motorcycle is uniform, we can find the distance traveled by the motorcycle during this time by using the following SUVAT equation:

S=\frac{1}{2} (v_i +v_f) t

Substituting numbers into the equation, we find

S=\frac{1}{2}( 21 m/s + 0)(6.0 s)=63 m

7 0
3 years ago
A 282 kg bumper car moving 3.50 m/s collides with a 155 kg bumper car moving -1.38 m/s. Afterwards the 282 kg car moves at 1.10
icang [17]

Answer:

4.03 m/s

Explanation:

Initial momentum = final momentum

(282 kg) (3.50 m/s) + (155 kg) (-1.38 m/s) = (282 kg) (1.10 m/s) + (115 kg) v

v = 4.03 m/s

6 0
3 years ago
Read 2 more answers
Radiation heat transfer can be due to what?
riadik2000 [5.3K]

Answer: Heat transfer due to emission of electromagnetic waves is known as thermal radiation.

Explanation: Heat transfer through radiation takes place in form of electromagnetic waves mainly in the infrared region. Radiation emitted by a body is a consequence of thermal agitation of its composing molecules.

4 0
3 years ago
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Find the weight required to stretch a steel road by 2 mm, if the length of the road is 2 m and diameter 4 mm. Y= 200 GPa and g -
svetlana [45]

Answer:

Option D is the correct answer.

Explanation:

We equation for elongation

   \Delta L=\frac{PL}{AE}      

Here we need to find weight required,

We need to stretch a steel road by 2 mm, that is ΔL = 2mm = 0.002 m

A=\frac{\pi d^2}{4}=\frac{\pi ({4\times 10^{-3}})^2}{4}=1.26\times 10^{-5}m^2

E = 200GPa = 2 x 10¹¹ N/m²

L=2m

Substituting

0.002=\frac{P\times 2}{1.26\times 10^{-5}\times 2\times 10^{11}}\\\\P=2520N=256.4kg

Option D is the correct answer.

6 0
3 years ago
The loudness of a sound will be determined by its
adoni [48]

Answer:

By its amplitude.

Explanation:

loudness is sound intensity & intensity depends on square of amplitude. for example higher the amplitude higher the intensity which means higher the loudness.

4 0
3 years ago
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