1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
liq [111]
3 years ago
8

Which of the following statements about radiation is true?

Physics
1 answer:
omeli [17]3 years ago
7 0
I'm not sure but I think it is A.
You might be interested in
An apple hanging from a limb has potential energy because of its height . If it falls ,what becomes of this energy just before i
sineoko [7]

Answer: Just before its hits the ground it becomes kinetic energy and when it hits the ground it becomes in another form of energy (acoustic energy or thermal energy, for example)

Explanation:

Energy is the ability of matter to produce work in the form of movement, light, heat, among others.

In this sense, according to the Conservation of Energy principle: <em>"energy is not created or destroyed, it is transformed."</em>

So, in the case of the apple, its total energy is conserved.

When the apple is hanging from a limb, it has zero kinetic energy K_{o}=0 (because it is at rest) and has gravitational potential energy U_{o}, which depends on the mass m, the acceleration due gravity g and the height h:

U_{o}=mgh

When the apple falls, just before its hits the ground, this gravitational potential energy transforms in kinetic energy K_{1} (since the apple is moving), which depends on the mass and velocity V of the apple:

K_{1}=\frac{1}{2}mV^{2}

When the apple hits the ground, the gravitational potential energy is zero (h=0) and the kinetic energy transforms into some other form of energy (acoustic energy or thermal energy, for example).

3 0
2 years ago
When the amount of water in a river increases so much that the river overflows its channel, a flood occurs.True or false
suter [353]

That's true, and there are also other mechanisms that can also create floods.

4 0
3 years ago
How is pressure and density related?
enyata [817]

Answer:

Density is directly proportional to pressure

Explanation:

As pressure increases (with constant temperature), density also increases.

Density is inversely proportional to temperature.

5 0
2 years ago
Question #6
Novay_Z [31]

The two points on a periodic wave in a medium are said to be in phase if they have the same amplitude and are moving in the same direction.

Option 4.

Explanation:

A periodic wave is termed for waves which flow in a repetition pattern in a given time scale. Periodic wave can also be termed as a transverse wave. So a transverse wave have various crests and troughs. The two successive crests and two successive troughs are said to be in phase with each other.

Thus, for a periodic wave in a medium, the in phase can be obtained in two points which have the same amplitude and are moving in the same direction.

As amplitude is a scalar quantity and so direction should be taken into consideration for making the points related to successive crests only in phase with themselves. Also this also relates the points related to successive troughs to be in phase with each other. But a crest and a trough will not be in phase with each other.

Thus, option 4, that is the two points on a periodic wave in a medium are said to be in phase if they have the same amplitude and are moving in the same direction.

4 0
3 years ago
Give an example of mass making a difference in the amount of gravitational energy. Tell how you know the gravitational energy is
Andreas93 [3]

Answer:

The Gravitational potential energy at large distances is directly proportional to the masses and inversely proportional to the distance between them. The gravitational potential energy increases as r increases.

Examples of Gravitational Energy

A raised weight.

Water that is behind a dam.

A car that is parked at the top of a hill.

A yoyo before it is released.

5 0
2 years ago
Other questions:
  • You need to connect your doorbell to a battery. You should select wire that will A.accept the flow of electrons.
    11·2 answers
  • Choose the word that best completes each sentence.
    13·2 answers
  • What is wave polarization?
    5·1 answer
  • Why is it hard to breath on top of a mountain?
    5·1 answer
  • A puck is sliding around a circular track that is banked at an angle with respect to the horizontal such that no friction betwee
    9·1 answer
  • Which feature of a longitudinal wave corresponds to a trough in a transverse wave?
    6·2 answers
  • A train is pulling four train cars and each car has a mass of 40,000 kg. The train is accelerating at 1.1 m/s^2. What is the for
    12·2 answers
  • What happens when fusion begins in the outer shell of a star? The energy produced causes the star to contract into a dwarf. The
    6·1 answer
  • What kind of light source is an IMAX movie screen​
    14·1 answer
  • 100 POINTS+BRAINLIEST: 8TH GRADE PHYSICS: “As an object moves away from the center of the earth, the force of gravity INCREASES
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!