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
djverab [1.8K]
3 years ago
8

Which situation is the best analogy for the doppler effect?

Physics
1 answer:
Rudiy273 years ago
8 0
The best scenario to describe the doppler effect would be listening to the siren of a passing ambulance or fire truck

then it is coming towards you, the pitch is higher, it gets higher as it approaches and peaks as it gets right in front of you. then it drop at once when it passes you and continues to drop till it fades away. this is a classic descrption of the doppler effect
You might be interested in
A meter stick is pivoted at its 50 cm mark but does not balance because of non-uniformities in its material that cause its cente
Cerrena [4.2K]

Answer:

The mass of the stick is:

M=0,9428kg

The center of mass is at the 48,41cm mark

Explanation:

To be balanced in any case the resultant torque of the system must be zero.

For the first situation:

We have a 0,15kg mass al -0,4m from the pivot point, and a 0,3kg mass at +0,25m of the pivot point. On the other hand we know that the center of gravity of the stick is not at the 50cm mark point, so it will be at a X distance with a mass M, the torque sum:

0,15kg*(-0,4m)+0,3kg*0,25m+X*M=0

So:

(1)X*M=-0,015kgm

For the second situation:

Now the weights are interchanged, and as the pivot point has change, the distances from the pivot point are different:

We have a 0,3kg mass al -0,33m from the pivot point, and a 0,15kg mass at +0,32m of the pivot point. As the pivot has moved we have to move our reference for X: The center of gravity of the stick is at a X+0,07m distance with a mass M, the torque sum:

0,3kg*(-0,33m)+0,15kg*0,32m+(X+0,07m)*M=0

(X+0,07m)*M=0,051kgm

X*M+0,07m*M=0,051kgm

replacing X*M from (1):

-0,015kgm+0,07m*M=0,051kgm

The mass of the stick is:

M=(0,051kgm+0,015kgm)/0,07m=0,9428kg

and replacing this in (1):

X*0,9428kg=-0,015kgm

X=-0,015kgm/0,9428kg=-0,0159m=-1,59cm

As we took the 50cm mark as the reference, the center of mass is at the 48,41cm  mark

8 0
3 years ago
Which list includes the phase changes that require a loss of energy (heat)?
Lemur [1.5K]

Answer:

b  

Explanation:

because if you freeze somthing you do not gain heat you loss heat.

3 0
2 years ago
What is the difference between forming a hypothesis and making a prediction based on the hypothesis?
Alexus [3.1K]

Answer:

While a hypothesis is a guess that is predominantly used in science, a prediction is a guess that is mostly accepted out of science. A hypothesis is otherwise known as a good or intelligent guess. ... Moreover, hypotheses are testable guesses about the things that you'd expect to take place in your research study.

3 0
3 years ago
Read 2 more answers
This is science btw please help me
raketka [301]
Data charts would use descriptive statistics to show accurate reading measured throughout the lab. Charts and graphs can also be used to show the progress and result of the lab.
7 0
3 years ago
Read 2 more answers
Why is it that the weight of an object weighing 1N air, weighs more when immersed in water ?
Anni [7]
There is no "why", because that's not what happens.  The truth is
exactly the opposite. 

Whatever the weight of a solid object is in air, that weight will appear
to be LESS when the object is immersed in water.

The object is lifted by a force equal to the weight of the fluid it displaces.
It displaces the same amount of air or water, and any amount of water
weighs more than the same amount of air.  So the force that lifts the
object in water is greater than the force that lifts it in air, and the object
appears to weigh less in the water.
4 0
3 years ago
Other questions:
  • A. Describe the mass, charge, and location of protons, neutrons, and electrons in an atom.
    8·2 answers
  • What is the magnitude and direction of the electric field atradiaConsider a coaxial conducting cable consisting of a conductingr
    8·1 answer
  • The moon has a weaker gravitational force than earth. Sofia weighs 50 lbs. on earth. How much will she weigh on the moon? exactl
    9·2 answers
  • A 2.00-kg object is attached to a spring and placed on a frictionless, horizontal surface. A horizontal force of 20.0N is requir
    11·1 answer
  • A 1.3 kgkg block slides along a frictionless surface at 1.3 m/sm/s . A second block, sliding at a faster 5.0 m/sm/s , collides w
    9·2 answers
  • Two dogs are running a race of 100m. The green dog runs the 100m in 10s. The
    15·1 answer
  • Helppppppppppopppppppp​
    8·2 answers
  • Wire B has twice the length and twice the radius of wire A. both wires are made from the same material. if wire A has a resistan
    9·1 answer
  • Newtons first law of motion is also called galelios law of_______?
    15·2 answers
  • According to one of the laws of thermodynamics, energy cannot be what?
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!