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
Levart [38]
3 years ago
15

A laser is used to make a CD or DVD by _____.

Physics
1 answer:
boyakko [2]3 years ago
7 0

Answer:

A)  

Explanation:

Inside your CD player, there is a miniature laser beam called a semiconductor diode laser and a small photoelectric cell an electronic light detector. The laser flashes up onto the shiny side of the CD, bouncing off the pattern of pits  and lands  on the disc.

You might be interested in
The statement that no two electrons in the same atom can have the same four quantum numbers is a restatement of
andreev551 [17]

Answer:

Pauli exclusion principle

Explanation:

Pauli's exclusion principle speaks to the quantum numbers assigned to an electron to describe it's general position and movement. Two electrons can occupy the same energy level (which is described by the first quantum number-the principal quantum number), the orbital angular momentum quantum number (represented by the second number) and magnetic quantum number. electrons that have the same value for all three numbers will have different spins. one will have positive a half while the other has negative a half. Therefore they will never have the same complement of quantum numbers

6 0
3 years ago
Sally is trying to lift a heavy box, but is not strong enough to lift it.  Would the force that she is applying to the box be an
mestny [16]
If you give it unbalanced force it would go up and if you can't give it enough it will stay a balanced force
 
3 0
3 years ago
Reactants → products
Nat2105 [25]
The answer is A

Explanation: the conservation of matter means that the mass stays the same
4 0
3 years ago
Read 2 more answers
0.0084x91 ...................
Drupady [299]

Answer:

0.0084×91=0.7644

Explanation:

hope this helps

8 0
3 years ago
Read 2 more answers
What's the concept of mass ?
Marat540 [252]
Masa is a concept that identifies that magnitude of a physical nature that allows indicating the amount of matter in a body. Within the International System , its unit is the kilogram ( kg . ) 
6 0
3 years ago
Other questions:
  • The bottom of the inner curve of a hook is called
    6·1 answer
  • A 2.0 kg ball and a 3.5 kg ball, each moving at 0.90 m/s, undergo a head-on collision. The lighter ball rebounds opposite its in
    6·1 answer
  • a car travelling at 20m/s comes to a stop in 5 seconds. what distance is required for the car to come to a stop?​
    9·1 answer
  • Imagine you are on a roller coaster, riding a skateboard, or running across the ball field. What are some clues that you are mov
    15·1 answer
  • Please answer my question!,
    13·1 answer
  • Are brought close together?<br>5. What happens when like magnetic poles​
    12·1 answer
  • A net force of 1 newton causes an object to accelerate at a rate of 5.0 meters per second per second. What is the mass of the ob
    15·1 answer
  • The block A and attached rod have a combined mass of 50 kg and are confined to move along the guide under the action of the 796-
    10·1 answer
  • Find the resultant of the following vector
    11·1 answer
  • A force of 1 N is equal to which combination of SI units?
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!