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
kicyunya [14]
3 years ago
5

When light is reflected by a mirror, the angle of incidence is always A. equal to the angle of reflection. B. less than the angl

e of reflection. C. 90 degrees with respect to the reflecting surface. D. greater than the angle of reflection.
Physics
2 answers:
ankoles [38]3 years ago
6 0
When light is reflected by a mirror, the angle of incidence is always <span>A. equal to the angle of reflection. We know this by the Law of Reflection.</span>
alexandr1967 [171]3 years ago
5 0

a equal to the reflection

You might be interested in
What planet is closet in mass to earth
alexdok [17]

Answer:venus

Explanation:

is most like Earth in terms of mass and size, and it is also the planet closest to Earth, but the two planets are far from identical twins.

3 0
3 years ago
Read 2 more answers
Applying the Law of Conservation of Energy. If a car was released down the track from a height what happens to the potential ene
erastova [34]

Answer:

According to the law of conservation of energy, energy cannot be created or destroyed,  although it can be changed from one form to another.    KE + PE = constant. A simple example involves a stationary car at the top of a hill.  As the car coasts down the hill, it moves faster and so it’s kinetic energy increases and it’s potential energy decreases.  On the way back up the hill, the car converts kinetic energy to potential energy.  In the absence of friction, the car should end up at the same height as it started.

This law had to be combined with the law of conservation of mass when it was determined that mass can be inter-converted with energy.

One can also imagine the energy transformation in a pendulum.  When the ball is at the top of its swing, all of the pendulum’s energy is potential energy.   When the ball is at the bottom of its swing, all of the pendulum’s energy is kinetic energy.   The total energy of the ball stays the same but is continuously exchanged between kinetic and potential forms

4 0
2 years ago
A lightweight vertical spring of force constant k has its lower end mounted on a table. You compress the spring by a distance d,
shusha [124]

Answer:

v=d\sqrt{\frac{k}{m}}

Explanation:

In order to solve this problem, we can do an analysis of the energies involved in the system. Basically the addition of the initial potential energy of the spring and the kinetic energy of the mass should be the same as the addition of the final potential energy of the spring and the kinetic energy of the block. So we get the following equation:

U_{0}+K_{0}=U_{f}+K_{f}

In this case, since the block is moving from rest, the initial kinetic energy is zero. When the block loses contact with the spring, the final potential energy of the spring will be zero, so the equation simplifies to:

U_{0}=K_{f}

The initial potential energy of the spring is given by the equation:

U_{0}=\frac{1}{2}kd^{2}

the Kinetic energy of the block is then given by the equation:

K_{f}=\frac{1}{2}mv_{f}^{2}

so we can now set them both equal to each other, so we get:

=\frac{1}{2}kd^{2}=\frac{1}{2}mv_{f}^{2}

This new equation can be simplified if we multiplied both sides of the equation by a 2, so we get:

kd^{2}=mv_{f}^{2}

so now we can solve this for the final velocity, so we get:

v=d\sqrt{\frac{k}{m}}

6 0
3 years ago
What is the main function of a telescope?
Korvikt [17]
It magnifies light received from distant objects.
4 0
3 years ago
Read 2 more answers
Which is capeble of housing astronaughts while they conduct reasearch
dusya [7]

Answer:

2

Explanation:

2

5 0
3 years ago
Read 2 more answers
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
  • What is the name of the process that involves a strong attractive force that keeps atoms together
    7·2 answers
  • A transformer changes the 10,000 v power line to 120 v. if the primary coil contains 750 turns, how many turns are on the second
    14·1 answer
  • Which of the following does not affect gas pressure
    9·1 answer
  • A ball is thrown at 25 m/s at an angle of 55 degrees.
    10·1 answer
  • Sound wave A delivers 2J of energy in 2s. Sound wave length B delivers 10J of energy in 5s. Sound wave C delivers 2mJ of energy
    6·1 answer
  • Police radar guns measure the speed of moving vehicles by transmitting electromagnetic waves at a vehicle and detecting a Dopple
    13·1 answer
  • The desinty of a metal is 8.9g/cm3.what does it mean? what is the importance of this value?
    10·2 answers
  • Analyze the data to identify the mathematical relationship between the
    15·1 answer
  • A magnetic field protects earth from the sun’s high-energy particles. What two processes are involved in the formation of earth’
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!