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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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which of the following devices is used to create an open circuit? a. Switch b. Bulb c. Battery d. Resistor
Natalka [10]

Answer:

The answer is

A. Switch

Explanation:

A switch is a device for making and breaking current in an electric circuit, it is mostly made of a non conducting material to prevent the user from being electrocuted, switches comes in range of types depending on the area of applications.

7 0
3 years ago
Compare the weight of a 5.00-kg object on Earth’s surface to the gravitational force between a 5.00-kg object that is one Earth
makkiz [27]

Answer

given,

mass of an object = 5 Kg

mass of the other object = 5.98 x 10²⁴ Kg

radius of earth = 6371 Km = 6.371 x 10⁶ m

comparison between gravitational force between two object and weight of the object.

gravitational force between two objects

   F = \dfrac{Gm_1m_2}{r^2}

   F = \dfrac{6.67 \times 10^{-11}\times 5 \times 5.98 \times 10^{24}}{(6.371 \times 10^6)^2}

      F = 49.134 N

weight of the object on the earth surface

  F = m g

  F = 5 x 9.81

  F = 49.05 N

From the above two calculation we can conclude that gravitational force is approximately equal to weight of the body.

5 0
3 years ago
A battery of constant voltage is connected to a variable resistor. As the resistance of the resistor increases, what happens to
vova2212 [387]

The electric current amount will vary according to the resistance value when connected to a voltage of a power supply. If resistance is reduced, current will increase. So, if the resistance is infinite (open circuit), the current could be considered zero, or infinitesimal small, if the resistance is zero (of infinitesimal small), the current will tend to be the maximum the power supply can provide. Here is the case of the power supply capability, input resistance, capacity to hold and regulate the output voltage to a certain maximum current, etc. Normally when you short circuit (zero ohms resi

4 0
3 years ago
Vector A has magnitude 8.00 mm and is in the xy-plane at an angle of 127∘ counterclockwise from the +x–axis (37∘ past the +y-axi
Ilia_Sergeevich [38]

Answer:

-75.35°

Explanation:

Let C be the sum of the two vectors A and B. Hence, we can write the following  

A_{x} +B_{x} =C_{x} ......(1)\\A_{y} +B_{y} =C_{y} ......(2)

but since the vector C is in the -y direction, C_{x}  = 0 and C_{y} = —12 m.  

Thus  

B_{x} =-A_{x} =-[-Acos(180-127)]=(8)*cos(53)\\B_{x} =4.81m

similarly, we can determine B_{y} by rearranging equation (1)  

 B_{y} =C_{y} -A_{y} =-12m-[(8)*sin(53)\\B_{y} =-18.4m

so the magnitude of B is

B=\sqrt{B_{x}^2+B_{y}^2  } \\B=19m

Finally, the direction of B can be calculated as follows  

Ф=tan^{-1} (\frac{B_{y} }{B_{x} } )\\=-75.35

hence the vector B makes an angle of 75.35 clockwise with + x axis

8 0
4 years ago
If root-mean-square voltage of a supply is 240 V, calculate the maximum voltage of
Levart [38]

Answer:

Vp= Vr sq. root 2

= 240 × sq. root 2

=339.4 V

5 0
4 years ago
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