PHYSICS HIGH SCHOOL

Which explains earthquakes and volcanic eruptions?global positioning theory
lithospheric theory
plate tectonics theory
nebular theory

Answers

Answer 1
Answer:

Answer;

Plate tectonics theory

Explanation;

  • According to the plate tectonics theory, the plates making the earth float on the partially molten mantle, moving away from the mid ocean ridges at varying speeds. At a point where the plates pull apart, slide or collide, a tectonic activity will be manifested as earthquakes.
  • Earthquakes take place when the plate boundaries get stuck together while the plates keep moving. Volcanoes on the other hand take place when plates crash into or pull away from each other and hot magma from below rises up to the surface in an eruption.
Answer 2
Answer: I think the answer is plate tectonics theory because when the are moving, they sometimes hit each other and it makes earthquakes and volcanic eruptions

But i'm not sure

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Water enters a baseboard radiator at 180 °F and at a flow rate of 2.0 gpm. Assuming the radiator releases heat into the room at a rate of 20,000 Btu/ hr., what is the temperature of the water leaving the radiator?
Can anyone help me with this question?
True or false?A bomb dropped from an airplane and a ball thrown at a particular angle are examples of projectile motion.
A 0.09 kg marble sits at rest on the top of a sloping, frictionless track.a. If the slope has a height of 1.5 m, calculate the velocity of the marble at the bottom ofthe slope.

A wave will "break" because ________. a wave will "break" because ________. the sediment load of water is greater near the shore of random molecular motion in wave forms the density of water increases closer to shore the bottom interferes with its oscillatory motion the wind increases its speed near shorelines

Answers

A wave will "break" because the bottom interferes with its oscillatory motion. Breaking of waves may occur anywhere that the amplitude is sufficient, including in mid-ocean. When waves enter shallow water they break because the motion of water in lower part of the wave nearest the bottom is slowed by friction so that their oscillation is faster than its supporting portion at the bottom. Thus, the wave collapses forward and breaks.

Final answer:

A wave breaks due to the interference of the ocean floor with its oscillatory motion. As the wave nears the shore and the water gets shallower, the bottom of the wave slows down while the top continues its original speed, causing the wave to break.

Explanation:

A wave will 'break' or crash due to its interaction with the ocean floor as it approaches the shore. Waves follow an oscillatory motion, moving in an up-down pattern. When a wave gets closer to shore, the water becomes shallower which interferes with the oscillatory motion of the wave. The bottom of the wave slows down upon hitting the ocean floor while the top of the wave continues its original speed. This causes the wave to become steep and eventually break, forming the crashing wave front we often see on beaches.

Learn more about Wave breaking here:

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The force that moving, charged particles exert on one another is called

Answers

Electromagnetic force.

Hope I helped :-)

Which states the law of conservation of energy?A.
Energy cannot be created or destroyed, but it can be converted or changed into different forms.

B.
Energy can be created or destroyed, and it can be converted or changed into different forms.

C.
Energy cannot be created or destroyed, nor can it be converted or changed into different forms.

D.
Energy can be created or destroyed, but it can not be converted or changed into different forms.

Answers

Statement A is correct. Energy cannot be created or destroyed it can only be converted or changed into different forms. 

The other forms include kinetic, potential and internal energy. Heat, and work are also other forms of energy. 
b. Energy can be created or destroyed, and it can be converted or changed into different forms.

An observation of the red shift of galaxies suggests that the universe isa.
expanding.
c.
reversing.
b.
contracting.
d.
stagnant.

Answers

An observation of the red shift of galaxies suggests that the universe is expanding. The answer is letter A. .  It means that bodies farther away from Earth were moving away faster. The Hubble’s constant is the ratio of distance to redshift equal to 170 kilometers per second per light year of distance.

 

Answer:

expanding

Explanation:

If (on earth) an object falls 18m and loses 36J of GPE. What is the objects mass?

Answers

The gravitational potential energy of the object falling from 18 m height is 36 J. Thus, its mass is 0.2 Kg.

What is gravitational potential energy?

Gravitational potential energy of an  object is the energy generated by virtue of its position in a gravitational field. The magnitude of gravitational potential energy is directly proportional to the mass of the object , height from the surface and the acceleration due to gravity.

GPE = mgh

The height of the object falling = 18 m

Gravitational potential energy = 36 J

Acceleration due to gravity in earth = 9.8 m/s².

Mass of the object = GPE/ (gh)

                               = 36 J/ (18 m×9.8 m/s² )

                               = 0.20 Kg.

Therefore, the mass of the object is 0.20 Kg.

To find more on gravitational potential energy, refer here:

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PE=mgh
Where 'g' is the gravitational constant (9.81 m/s^2)
If you're solving for m, you can change the equation to be (PE/gh)=m.
m=(36J/18m*9.81m/s^2)
m=.2kg

A rock hits the ground with a speed of 7 m/s and a kinetic energy of 100 J. What is the rock's mass?

Answers

KE=1/2 times mass times velocity squared. So in this situation your equation would look like this 100J=1/2 times mass times 7 m/s^2. Your answer would be 4.0812 kg
mass = (2*KE) / v²
∴ the answer is 200/49 
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