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
mr_godi [17]
4 years ago
8

According to the Doppler Effect, which statement is true about a sound as it approaches you and then moves away.

Physics
1 answer:
lara31 [8.8K]4 years ago
3 0
I think the answer is A
You might be interested in
20 takeaways about fitness​
Anna35 [415]

Answer:

1 exercise 2 walking daily 3 practice jogging 4 drinking large amounts of water 5 eating vegetables and fruit 6 minimal of sugars 7 minor 8 Adequate sleep from 6 to 8 hours 9

Explanation:

I don't know more!

Explanation:

5 0
4 years ago
An object moving 20 m/s
yan [13]

Answer:

<u>We are given:</u>

initial velocity (u) = 20m/s

acceleration (a) = 4 m/s²

time (t) = 8 seconds

displacement (s) = s m

<u />

<u>Solving for Displacement:</u>

From the seconds equation of motion:

s = ut + 1/2 * at²

replacing the variables

s = 20(8) + 1/2 * (4)*(8)*(8)

s = 160 + 128

s = 288 m

7 0
3 years ago
A car accelerates from 13 m/s to 25 m/s in 5.0 s. assume constant acceleration. what was its acceleration?
natima [27]
<span>a = 25-13/6  = 12/6 = 2 m/s^2
Av speed: 25+13/2 = 38/2  = 19 m/sec
Dist = speed * time
19 * 6 = 114 meters</span>
8 0
3 years ago
The electric current in a wire is 1.5A. How many electrons flow past a given point in a time of 2s?
kipiarov [429]

Answer:

The amount of electrons that flow in the given time is 3.0 C.

Explanation:

An electric current is defined as the ratio of the quantity of charge flowing through a conductor to the time taken.

i.e           I = \frac{Q}{t} ...................(1)

It is measure in Amperes and can be measured in the laboratory by the use of an ammeter.

In the given question, I = 1.5A, t = 2s, find Q.

From equation 1,

            Q = I × t

                = 1.5 × 2

               = 3.0 Coulombs

The amount of electrons that flow in the given time is 3.0 C.

5 0
3 years ago
Based on their colors, which of the following stars is hottest? Which is coolest? Archenar (blue), Betelgeuse (red), Capella (ye
Cloud [144]

Answer: The hottest star is Archenar( blue) and the coolest star is Betelgeuse

Explanation:

Objects emit radiation that depends exclusively on their temperature. At an ambient temperature, the radiation emitted by an object is in the infrared spectrum (we could only see it with a special camera). If we heat it we will see that it first turns red (whose state we call “red hot”) because it is the lowest and least energetic wavelength of all.

If we continue to heat it, the wavelength that it emits to one with more energy will continue to increase and we will see that it turns yellow and then white. This is a signal that is emitting at all frequencies (but mainly in blue).

If we continue to warm a body that is "white hot", it would emit in the ultraviolet spectrum, with what would become ... black! then we would not see it emits light in the visible spectrum (well, we would see a very faint bluish light corresponding to the tail of the distribution of the spectrum it emits, but the peak of that spectrum would be in the ultraviolet).

6 0
3 years ago
Read 2 more answers
Other questions:
  • Suppose you use a machine that gives you a mechanical advantage of 2 to achieve an output force of 30 Newtons. What must the inp
    7·1 answer
  • Yodelin has fifty quarters and dimes. Their total value is $9.80. Which of these systems of equations can be used to find the nu
    7·1 answer
  • A rock is thrown upward from level ground in such a way that the maximumheight of its flight is equal to its horizontal rangeR.
    6·1 answer
  • To understand Newton's 1st law. Newton's Principia states this first law of motion: An object subject to no net force maintains
    5·1 answer
  • What type of power plant is virtually pollution free
    10·1 answer
  • A pilot can withstand an acceleration of up to 9g, which is about 88 m/s2, before blacking out. What is the acceleration experie
    7·1 answer
  • HELP ME!
    10·1 answer
  • Random question, what does hot dog REALLY mean?
    14·1 answer
  • What muscle will Lunges work ?<br> A) Bicep<br> B)Tricep<br> C) quadriceps<br> D) pectoralis major
    11·1 answer
  • A given wire of resistance 1 ohm
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!