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
aev [14]
3 years ago
15

From a vantage point very close to the track at a stock car race, you hear the sound emitted by a moving car. You detect a frequ

ency that is 0.86 times as small as the frequency emitted by the car when it is stationary. The speed of sound is 343 m/s. What is the speed of the car?
Physics
1 answer:
V125BC [204]3 years ago
6 0

Answer:

55.8 m/s

Explanation:

f = Actual frequency of sound emitted by car

f' = frequency observed when the car moves = (0.86)f

V = Speed of sound = 343 m/s

v = Speed of car

Frequency observed is given as

f' = \frac{Vf}{V+v}

(0.86) = \frac{(343)}{343 + v}\\(0.86) = \frac{(343)}{343 + v}\\294.98 + (0.86) v = 343 \\v = 55.8 ms^{-1}

You might be interested in
Two identical space probes are orbiting Jupiter. Scientists determine that one of the space probes has a larger gravitational fo
galina1969 [7]

If the probes are identical, then the one that feels a larger gravitational
force is orbiting closer to Jupiter than the other one is.

If they're not identical, then the one with greater mass will feel more
gravitational force than the one with less mass, even if they're both
the same distance from Jupiter.  (We know this from the experimental
observation that fatter people weigh more, even on Earth.)
6 0
3 years ago
Read 2 more answers
This glass of lemonade is sitting in the hot summer sun. As time passes, in which direction will heat transfer take place?
KiRa [710]

Answer:

c

Explanation:

8 0
2 years ago
Read 2 more answers
Erica throws a tennis ball against a wall, and it bounces back. Which force is responsible for sending the ball back to Erica?
matrenka [14]
Kinetic energy is responsible for this

6 0
3 years ago
Read 2 more answers
What does the pupil of the eye controls
Alja [10]
The correct answer would be D
5 0
3 years ago
The aluminum atom______electrons to form an ion.<br> The ion that is formed is______.
Alchen [17]

The aluminum atom_loses_____electrons to form an ion.

The ion that is formed is_Al³⁺_____.

aluminium has the electronic configuration as 1s² 2s² 2p⁶ 3s² 3p¹

from the electronic configuration , we see that aluminium can attain stability by losing 3 electrons from outer shell.

after losing 3 electrons , the ion formed is given as Al³⁺

hence the correct options to fill in the blanks are lose  and Al³⁺


3 0
2 years ago
Read 2 more answers
Other questions:
  • You have a 160-Ω resistor and a 0.430-H inductor. Suppose you take the resistor and inductor and make a series circuit with a vo
    10·1 answer
  • What force is necessary to accelerate a 70-kg object at a rate ifm4.2 m/s
    9·1 answer
  • What color does the star alpha centauri appear to be?
    6·2 answers
  • If a burning log is a black object with a surface area of 0.25 m2 and a temperature of 800 8c, how much power does it emit as th
    11·1 answer
  • A uniform rod of mass 3.30×10−2 kg and length 0.450 m rotates in a horizontal plane about a fixed axis through its center and pe
    5·1 answer
  • You are kicking your soccer ball back and forth on a soccer field. You kick the ball forward for 10 m. You turn completely aroun
    14·1 answer
  • A 845kg dragster (very fast car) accelerates from 2m/s to 30m/s in 0.9s. Determine the average force exerted on the dragster.
    9·1 answer
  • A car traveling 85 km/h is 250 m behind a truck<br> traveling 73 km/h.
    6·1 answer
  • Which location(s) would usually have SURFACE WINDS blowing in TOWARDS IT from other places? *
    8·2 answers
  • A rock is dropped from a height of 2.7m. How fast is it going when it hits the ground?
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!