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
crimeas [40]
3 years ago
8

A ray of light makes an angle of 10° with the horizontal above it and strikes a plane mirror which is inclined at an angle O to

the horizontal. The angle O for which the reflected ray becomes vertical is (a) 40°. (B)50°. (C)80°. (D) 100°
Physics
1 answer:
Serggg [28]3 years ago
7 0
180 - (40 * 2) = 100°

So the answer is (D) 100°

Hope this helps! :)
You might be interested in
Which actions are examples of conserving resources? Check all that apply.
uysha [10]

Answer:

1st, 2nd, and 4th

Explanation:

1st conserves gasoline/petroleum

2nd conserves electricity

4th conserves paper

6 0
3 years ago
Read 2 more answers
Why are there shadows?
Deffense [45]
Shadows are formed when an opaque object or an object that doesn't allow light to pass through is in the way or infront of etc. a source of light.
6 0
3 years ago
Read 2 more answers
What is the proper battery cable connection when jumping two automotive batteries? (a) negative to negative / positive to positi
Vladimir [108]
<span>The proper </span><span>battery cable connection when jumping two automotive batteries is :  </span><span>(a) negative to negative / positive to positive. 

</span><span>Connect the red (positive) cable from the car with the bad battery to the red (positive) on the good battery. </span>

<span>Then connect the black (negative) from the good battery to a grounding point on the other car which should be tightened and metal should be clean.
</span>
<span>Once the car with bad battery has started, the removal of the cable should be in the opposite order. The Red (positive) which was the the First Cable to go on should be the last cable to be taken off.</span>


3 0
3 years ago
A 55.0-kg skydiver drew falls for a period of time before opening his parachute. what is his kinetic energy when he reaches a ve
Jlenok [28]
Mass (m)=55kg

acceleration (a)=9.81 m/s^2, this is the acceleration due to gravity.

initial velocity=0m/s. The skydiver doesn’t start with any speed because she is on the plane or helicopter.

final velocity=16m/s This is the velocity (speed) the skydiver reaches

The equation we use is KE=.5mv^2
Kinetic energy=.5 mass x velocity^2

KE=.5(55kg)(16m/s)^2
KE=.5(55kg)(256m/s)
KE=.5(14080J)

J=Joules

KE=7040J

Kinetic energy is 7040 Joules (J)

Hope this helps
3 0
3 years ago
Earth travels fastest in January and slowest in July. What is the most likely explanation for this?
Keith_Richards [23]

Answer:

Earth is nearest the Sun in July and farthest away in July.

Explanation:

3 0
3 years ago
Read 2 more answers
Other questions:
  • When you arrive to the scene of an injury where the victim is unconscious, why should you not move them?
    7·1 answer
  • Which of of the following is a physical change ice melting into a puddle of water,Leaves changing color in fall, Or baking a cak
    10·1 answer
  • You use a pulley system to lift a car engine. You apply a force of 120n and the pulley pulls on the engine with a force of 1050n
    13·2 answers
  • Matter's resistance to a change in motion is called _____ and is directly proportional to the mass of an object. For an object t
    15·1 answer
  • Two solenoids are equal in length and radius, and the cores of both are identical cylinders of iron. However, solenoid A has fou
    12·2 answers
  • Part C
    15·1 answer
  • A red cart has a mass of 4 kg and a velocity of 5 m/s. There is a 2-kg blue cart that is parked and not moving, thus its velocit
    10·1 answer
  • Evaluate the expression a+b when a=23 and b=45 . Write in simplest form
    13·1 answer
  • A police car is moving to the left at 34m/sec while its siren is emitting a 600Hz tone. What tone would you hear if you were par
    13·1 answer
  • When a student stands on a rotating table
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!