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
malfutka [58]
3 years ago
9

A police car is rapidly approaching you at a stop light. Explain what happens to the frequency of the sound as the police car dr

aws closer. What do you hear?
Physics
1 answer:
viva [34]3 years ago
7 0

When the police car is moving towards you, the sound waves are more compressed together, leading to a higher pitch sound. This is according to the Doppler Effect, in which sound waves ahead of the object is more compressed, leading to a higher pitch, and more spread out behind, leading to a lower pitch.

hope this helps

You might be interested in
the deflection angle of the laser beam as it exits the prism is 22. 6º. If the prism had been made of glass instead of polystyre
inessss [21]
Thirty three degrees
4 0
2 years ago
The drawing shows a golf ball passing through a windmill at a miniature golf course. The windmill has 12 blades and rotates at a
tester [92]

Answer:

v<em>min</em> = 0.23 m/s

Explanation:

The golf ball must travel a distance equal to its diameter in the time between blade arrivals to avoid being hit. If there are 12 blades and 12 blade openings and they have the same width, then each blade or opening is 1/24 of a circle of is 2π/24 = 0.26 radians across.

Therefore, the time between the edge of one blade moving out of the way and the next blade moving in the way is

time = angular distance/angular velocity

⇒ t = 0.26 rad / 1.35 rad/s = 0.194 s

The golf ball must get completely through the blade path in this time, so must move a distance  equal to its diameter in 0.194 s, therefore the speed of the golf ball is

v =d/t

⇒ v = 0.045 m / 0.194 s = 0.23 m/s

7 0
2 years ago
As the kinetic energy of an object increases, so does the _________ energy produced. A) heat B) light C) atomic D) potential
IrinaK [193]

Answer:

A) heat

Explanation:

As kinetic energy increases, so does the heat energy produced. The faster the molecules move, the more heat that is generated.

5 0
3 years ago
Read 2 more answers
Which law states that absolute zero cannot be reached?
Lera25 [3.4K]
Assuming you mean temperature

Answer: The third law of thermodynamics
6 0
2 years ago
2) Two railway tracks are parallel to west east direction. Along one track, train A moves with a speed of 45 m/s from
Natalija [7]

Answer:

105 m/s

Explanation:

Given that the speed of train A, V_A = 45 m/s from west to east.

Speed of train B, V_B = 60 m/s from east to west.

Train B is moving in the opposite direction with respect to the speed of train A. Assuming that the speed from east to west direction is positive.

So, the speed of train A from east to west= - 45 m/s

The speed of train B w.r.t train A = V_B - V_A=60-(-45)=60+45=105 m/s

Hence, the speed of train B w.r.t train A is 105 m/s from east to west.

5 0
3 years ago
Other questions:
  • Read the excerpt from "Introduction to Poetry" by Billy Collins. or walk inside the poem's room and feel the walls for a light s
    10·2 answers
  • 40 POINTS CORRECT ANSWER
    13·1 answer
  • Human skin color varies widely around the world, and children do not always exhibit the exact same coloring as their parents. Ba
    11·1 answer
  • 1. The combination of all the forces on an object is called
    10·1 answer
  • What two things increase the gravitational pull between two objects?
    5·2 answers
  • I NEED HELP ASAP!!!!!!!!!!!!!!!!
    12·2 answers
  • Alan travels 100 km in 5hrs. Find his average speed in km/h​
    12·2 answers
  • Please helppppppp!!!!!!
    6·1 answer
  • What is used to calculate or determine intensity during exercise
    13·1 answer
  • a 2000kg car initially traveling at a speed of 15 m/s is accelerated by a constant force of 10000 n for 3 seconds. the new speed
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!