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
liraira [26]
2 years ago
12

As an ambulance siren passes and moves away from you, the sound waves'

Physics
1 answer:
Tju [1.3M]2 years ago
7 0

\qquad\qquad\huge\underline{{\sf Answer}}♨

Amplitude and frequency are two properties of sound waves that decreases as distance from source decrease.

Therefore, as the ambulance moves away,

  • frequency - decreases
  • amplitude - decreases

So, correct choice is D

You might be interested in
Crickets Chirpy and Milada jump from the top of a vertical cliff. Chirpy drops downward and reaches the ground in 2.70 s, while
Vinvika [58]

Answer:

Explanation:

Given

Time taken to reach ground is t=2.7\ s

Malda initial velocity u=95\ cm/s

Let h be the height of Cliff

using h=ut+\frac{1}{2}at^2

where, u=initial velocity

t=time

In first case chirpy drop downward thus u=0

h=0+\frac{1}{2}(9.8)(2.7)^2

h=35.72\ m

For Milada there is horizontal velocity u=95 cm/s=0.95 m/s[/tex]

time taken to reach the ground will be same so distance traveled in this time with 0.95 m/s horizontal velocity is given by

R=u\times t

R=0.95\times 2.7=2.43\ m    

7 0
3 years ago
Near the surface of Earth an electric field points radially downward and has a magnitude of approximately 100 N/C. What charge (
pentagon [3]

Answer:

q=2.997\times 10^{-4}C

Sign-Negative

Explanation:

We are given that

Electric field =E=100NC^{-1} (Radially downward)

Acceleration=0.19 ms^{-2}(Upward)

Mass of charge=3 g=3\times 10^{-3}kg

1kg=1000g

We have to find the magnitude and sign of  charge would have to be placed on a penny .

By newton's second law

\sum F_y=ma

\sum F_y=qE-mg

Substitute the values then we get

qE-mg=ma

Substitute the values then we get

q(100)-3\times 10^{-3}(9.8)=3\times 10^{-3}(0.19)

100q-29.4\times 10^{-3}=0.57\times 10^{-3}

100q=0.57\times 10^{-3}+29.4\times 10^{-3}=29.97\times 10^{-3}

q=\frac{29.97\times 10^{-3}}{100}

q=2.997\times 10^{-4}C

Sign of charge =Negative

Because electric force acting  in opposite direction of electric field therefore,charge on penny will be negative.

4 0
3 years ago
A ball is dropped from the top of a building. it initially moves at 4.0 m/s. after 0.5 seconds, it moves at 3.8 m/s. what force
Dima020 [189]

Air resistance (meeting space requirements)

7 0
2 years ago
Help me please!!!
lilavasa [31]
Both planets are similar in shape and have a rocky surface. Not sure about the phases though
7 0
2 years ago
Read 2 more answers
39. A dog runs on a waxed floor at an initial speed of 2 m/s. It slides to a stop with an
Sedbober [7]

Answer:

Explanation:

Use the one-dimensional equation

v_f=v_0+at where vf is the final velocity of the dog, v0 is the initial velocity of the dog, a is the acceleration of the dog, and t is the time it takesto reach that final velocity. For us:

0 = 2 + -.43t and

-2 = -.43t so

t = 4.7 seconds

5 0
3 years ago
Other questions:
  • a toy car moves around a loop-the-loop track.The loop is 0.5 high.What is the minimum speed of the car at the top of the loop fo
    9·1 answer
  • Which statement explains why weather occurs more quickly in tropical rainforest?
    9·1 answer
  • What happens to lava as its temperature increases?
    15·1 answer
  • A 6kg object speeds up from 5 m/s to 20 m/s. find p
    11·2 answers
  • A ______ psychologist held children with learning problems and works with teacher and parents to create a healthy environment.
    12·1 answer
  • What is Pascal principle
    15·1 answer
  • HELP NOW PLS !!
    12·1 answer
  • What is mass? what is mass ?<br>​
    10·2 answers
  • What is the weak nuclear force?
    6·1 answer
  • Determine whether the underlined numerical value is a parameter or a statistic. explain your reasoning. a certain zoo
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!