PHYSICS HIGH SCHOOL

Which of these is NOT an event that helped make the Moon as it is today?a. Iron sank into Earth's core.
b. Plate tectonics caused lava to flow.
c. Earth and a planetesimal collided.
d. The lunar surface melted and was bombarded by meteoroids

Answers

Answer 1
Answer: The correct answer to the question that is stated above is letter b, Plate tectonics caused lava to flow. All of the options are mentioned in the theories of the formation of the moon except for letter B.

There are 5 serious  theories about the formation of the moon,these are:
The Fission Theory--
The Capture Theory--
The Condensation Theory--
The Colliding Planetesimals Theory--
The Ejected Ring Theory--

See attached file for the description of each theory.

Related Questions

What is the Average Depth of the ocean?
The steering wheel of a certain vehicle has a diameter of 34.6 cm, and it turns a shaft that is 8.9 cm in diameter. If a 94.8 N force is needed to turn the steering wheel, what torque is exerted on the wheel
A bear is sitting at rest on a tricycle. The bear then starts to accelerate uniformly at a rate of 2.5m/s2. How long will it take the bear to reach a velocity of 15 m/s?
Which planet has a "great red spot"​
Explain Nyquist Theorem?

If a grocery cart with a mass of 16.5 kg accelerates at +2.31 m/s2 against a frictional force of -15.0 N, what is the applied force?

Answers

Call the applied force 'A'. (Clever ?)

The forces on the cart are  'A' forward and 15 N backward.

The net force on the art is (A-15) forward.

F = m a

Net forward force = (mass of the cart) x (its forward acceleration)

(A - 15) = (16.5) x (2.31)

A - 15 = 38.115

Add 15 to each side:

A = 53.115 newtons
2th Law of Newton:

\vec{R}=m.a\n \n \vec{R}=\vec{F} -\vec{F_a}=m.a\n \n \vec{F}-15=16.5*2.31\n \n \vec{F}=38.115+15\n \n \boxed{\vec{F}=53.115 \ N}

What is used to create sounds of different pitches and tones by musicians?

Answers

The answer to the question that is being presented above would be musical instruments. These instruments are used to create sounds of different pitches and tones by musicians. They operate through being striked or 'sawed' to create vibrations that produce sound.

Maria throws an apple vertically upward from a height of 1.3 m with an initial velocity of +2.8 m/s. Will the apple reach a friend in a tree house 5.9 m above the ground? The acceleration due to gravity is 9.81 m/s 21. No, the apple will reach 5.27136 m below the tree house2. Yes, the apple will reach 5.27136 m above the tree house3. No, the apple will reach 1.43117 m below the tree house4. No, the apple will reach 1.5289 m below5. Yes, the apple will reach 1.5289 m above the tree house6. Yes, the apple will reach 1.43117 m above the tree house

Answers

Answer:

No, the apple will reach 4.20041 m below the tree house.

Explanation:

t = Time taken

u = Initial velocity = 2.8 m/s

v = Final velocity = 0

s = Displacement

g = Acceleration due to gravity = -9.81 m/s² = a (negative as it is going up)

Equation of motion

v^2-u^2=2as\n\Rightarrow s=(v^2-u^2)/(2a)\n\Rightarrow s=(0^2-2.8^2)/(2* -9.81)\n\Rightarrow s=0.39959\ m

The height to which the apple above the point of release will reach is 0.39959 m

From the ground the distance will be 1.3+0.39959 = 1.69959 m

Distance from the tree house = 5.9-1.69959 = 4.20041 m

No, the apple will reach 4.20041 m below the tree house.

The values in the option do not reflect the answer.

Final answer:

The apple will not reach the friend in the tree house as it will only reach a height of approximately 1.527 m.

Explanation:

To determine whether the apple will reach a friend in a tree house 5.9 m above the ground, we can use the equations of motion. Since the apple is thrown vertically upward, it will experience a negative acceleration due to gravity. Using the equation h = vo*t + (1/2)*a*t^2, where h is the final height, vo is the initial velocity, a is the acceleration, and t is the time, we can calculate the time it takes for the apple to reach a height of 5.9 m. Plugging in the values, we get:

5.9 = 2.8*t + (1/2)*(-9.81)*t^2

Simplifying the equation, we have:

-4.905*t^2 + 2.8*t - 5.9 = 0

Using the quadratic formula, we can solve for t. The quadratic formula is t = (-b ± sqrt(b^2 - 4ac)) / (2a), where a = -4.905, b = 2.8, and c = -5.9.

Plugging in the values, we get:

t = (-2.8 ± sqrt(2.8^2 - 4*(-4.905)*(-5.9))) / (2*(-4.905))

After evaluating the formula, we find that the apple will take approximately 1.527 seconds to reach a height of 5.9 m. Since the apple continues to rise after reaching this height, it will not reach the friend in the tree house.

A 40 kg dog is sitting on top of a hillside and has a potential energy of 1,568 J. What is the height of the hillside?

Answers


                       Potential energy  =  (mass) x (gravity) x (height)

                                   1,568 J  =  (40 kg) x (9.8 m/s²) x (height)

Divide each side
by 392 Newtons:           Height  =  (1,568 N-m) / 392 N

                                              =      4 meters . 

Answer:

B) 4.0m

Explanation:

When Jane drives to work, she always places her purse on the passenger’s seat. By the time she gets to work, her purse has fallen on the floor in front of the passenger seat. One day, she asks you to explain why this happens in terms of physics. What do you say?

Answers

Explanation: There may be different explanations:

Suppose that Jane's car has a built some sped, and she sees a stoplight. Now she needs to stop the car (decelerating the car)

When she does this, she creates a force that holds the car until it is full stop, but this force is applied only on the car, the purse that is on the passenger seat only feels this force by the friction that the seat does in his surface, but the purse has built some moment because it was inside the car, and the friction force that the seat does may not be enough to also stop the purse. So when Jane stops, the purse keeps moving forward, and then it falls down of the seat.
At some time during her drive she backed up with a substantial negative. ( backwards) acceleration. Since the pocket book is not physically connected to the seat it is free to move. Upon rapid negative acceleration the pocket book remains in its position while the car accelerates backwards away from it. this demonstrates Newtons 1st law of motion. The first law is the law of inertia. Which states, an object at rest. ( pocketbook) will remain at rest and an object in motion will continue in motion at constant velocity, unless acted upon by some outside force to change its motion.

List the characteristics properties of all waves. at what speed do electromagnetic waves travel in a vacuum

Answers

Electromagnetic waves travel at300,000,000 metres per second  in vacuum

The fundamental properties that can be attributed to waves are;

  1. reflection
  2. refraction
  3. diffraction
  4. interference.

Other properties are ;

  1. wavelength
  2. frequency
  3. amplitude.
  • A waves can be regarded as one that  disturb the  transfers energy.
  • what all this electromagnetic waves has in common is their ability of them to travel in the vacuum with the same speed.
  • Their speed in the vacuum is  300,000,000 metres per second which is the speed of light.

Electromagnetic radiation can be regarded as radiation that has waves of the electromagnetic field, which propagate   through the space, and it moves along with electromagnetic radiant energy.

  • Electromagnetic waves that are part of electromagnetic spectrum are:
  1. radio waves
  2. microwaves
  3. infrared light
  4. ultraviolet
  5. X-rays,
  6. gamma rays.
  • Wavelength can be regarded as  distance that exist  between identical points i.e the adjacent crests of the  adjacent cycles in that waveform
  • Frequency can be explained as the rate of vibration of the wave electromagnetic field per seconds.
  • The amplitude of wave can be regarded as distance from the centre line to the bottom of a trough, or to the top of a crest.

Therefore, electromagnetic waves travel at 300,000,000 metres per second in vacuum.

brainly.com/question/3101711?referrer=searchResults
All electromagnetic waves travel at

299,792,458 meters per second

in vacuum.
Other Questions
Two balls, each with a mass of 0.844 kg,exert a gravitational force of 8.45 × 10−11 Non each other.How far apart are the balls? The value of the universal gravitational constant is 6.673 × 10−11 N m2/kg2.
A radio station transmits waves at a frequency of 120MHz an a speed of 300 million m/s. Calculate the wavelength.
A spherical electron cloud surrounding an atomic nucleus would best represent
Help please thanks in advance x Red and violet are at opposite ends of the spectrum of visible light. Describe two things they have in common and two ways in which they differ. X