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
alisha [4.7K]
3 years ago
7

As a car heads down a highway traveling at a speed v away from a ground observer, which of the following statements are true abo

ut the measured speed of the light beam from the car's headlights? (Select all that apply.)
a. The ground observer measures the light speed to be c.
b. The driver measures the light speed to be c.
c. The driver measures the light speed to be c − v.
d. The ground observer measures the light speed to be c + v.
e. The ground observer measures the light speed to be c − v.
Physics
1 answer:
aliina [53]3 years ago
5 0

Answer:

a and b

Explanation:

According to theory of relativity by great Scientist Albert Eintein the speed of light is independent of frame of reference that the speed of light shall remain constnat whether the frame is inertial or non-inertial.

Therefore, both the ground observer and the driver shall measure same speed of light that is C.

You might be interested in
Luis wanted to know which of his 4 toy cars is the fastest. He conducted an experime and recorded his results in the table shown
Murrr4er [49]
The dependent variable was the time and the independent variable was thecars
6 0
4 years ago
The light waves have that particular interference from question #1 because they are emitted _____.
Elis [28]
I am attaching the rest of your question so it makes sense, 
<span>
Since lasers are made from stacking light waves that add together into a larger wave due to CONSTRUCTIVE INTERFERENCE.
</span>
Then, <span>light waves have that constructive interference (from question #1) because they are emitted IN PHASE with each other.

This means that they arrive at the same point of space with the same characteristics and their effects do not cancel each other, but the opposite, their intensity increases.</span>

7 0
3 years ago
Read 2 more answers
An ice sled powered by a rocket engine starts from rest on a large frozen lake and accelerates at +44 ft/s2. After some time t1,
mash [69]

Answer:

a) t₁ = 4.76 s, t₂ = 85.2 s

b) v = 209 ft/s

Explanation:

Constant acceleration equations:

x = x₀ + v₀ t + ½ at²

v = at + v₀

where x is final position,

x₀ is initial position,

v₀ is initial velocity,

a is acceleration,

and t is time.

When the engine is on and the sled is accelerating:

x₀ = 0 ft

v₀ = 0 ft/s

a = 44 ft/s²

t = t₁

So:

x = 22 t₁²

v = 44 t₁

When the engine is off and the sled is coasting:

x = 18350 ft

x₀ = 22 t₁²

v₀ = 44 t₁

a = 0 ft/s²

t = t₂

So:

18350 = 22 t₁² + (44 t₁) t₂

Given that t₁ + t₂ = 90:

18350 = 22 t₁² + (44 t₁) (90 − t₁)

Now we can solve for t₁:

18350 = 22 t₁² + 3960 t₁ − 44 t₁²

18350 = 3960 t₁ − 22 t₁²

9175 = 1980 t₁ − 11 t₁²

11 t₁² − 1980 t₁ + 9175 = 0

Using quadratic formula:

t₁ = [ 1980 ± √(1980² - 4(11)(9175)) ] / 22

t₁ = 4.76, 175

Since t₁ can't be greater than 90, t₁ = 4.76 s.

Therefore, t₂ = 85.2 s.

And v = 44 t₁ = 209 ft/s.

3 0
3 years ago
Which of the following is equal to an impulse of 15 units?
strojnjashka [21]

Answer:

B) Force = 7.5, Time = 2 is equal to an impulse of 15 units

3 0
3 years ago
Read 2 more answers
a race car driver achieved a speed of 53m/s in 14 seconds after taking off from rest from the starting line. what was the averag
Veronika [31]

Answer:

53/14

Explanation:

average acceleration = (Vfinal -Vintial)/ time taken

3 0
3 years ago
Read 2 more answers
Other questions:
  • A bowling ball and a bag of potato chips are dropped at the same time from a tall tower on the moon. there is no air on the moon
    8·2 answers
  • uring a collision with a wall, the velocity of a 0.200-kg ball changes from 20.0 m/s toward the wall to 12.0 m/s away from the w
    5·1 answer
  • Fluids flow and exert forces on objects.
    7·1 answer
  • What is newtons first,second, and third law?
    8·1 answer
  • A motorcycle rides on the vertical walls around the perimeter of a large circular room. The friction coefficient between the mot
    6·1 answer
  • A 14-Ω coffee maker and a 14-Ω frying pan are connected in series across a 120-V source of voltage. A 20-Ω bread maker is also c
    14·1 answer
  • .Ryan boiled a liter of water and then stirred sugar into it, adding more sugar until no more would dissolve in the water, creat
    14·1 answer
  • A 120-kg refrigerator, 2.00 m tall and 85.0 cm wide, has its center of mass at its geometrical center. You are attempting to sli
    7·1 answer
  • How would gravity cause planets to move if they did not have inertia?
    13·2 answers
  • A 0.242 g sample of potassium is heated in oxygen. The result is 0.292 g of a crystalline compound. What is the formula of this
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!