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goldenfox [79]
3 years ago
12

For the Doppler effect to occur ?

Physics
1 answer:
mart [117]3 years ago
3 0
Change of pitch that occurs<span> due to a moving sound source</span>
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A student sets up an experiment to determine the inertial mass of a cart. The student has access to the following measurement eq
sergiy2304 [10]

Answer:

The answer is choice A and choice D

Explanation:

The answer below is just a joke, don't listen to them.  

:)

7 0
3 years ago
Read 2 more answers
How is the volume flow rate of water out of the tank, dVdt, related to the flow speed v ? Express your answer in terms of some,
Rainbow [258]

Answer:

\frac{dV}{dt}= \frac{\pi d^2}{4}v

Explanation:

The rate of volume flow out of tank can be expressed as:

\frac{dV}{dt} = A\frac{dL}{dt}

where,

dV/dt = Volume flow rate

A = Cross-sectional area of outlet = πd²/4

d = diameter of circular outlet

dL = Displacement covered by water

dt = time taken

but we know that:

Velocity = υ = displacement/time = dL/dt

Substituting the values of "dL/dt" and "A" in the equation, we get:

\frac{dV}{dt} = \frac{\pi d^2}{4}v

This is the expression for volume flow rate dV/dt, on terms pf v, d.

8 0
3 years ago
I need help with a physics worksheet about Newtons Laws.
Viktor [21]

The diagram of the object on the inclined plane is shown below

The mass of 7kg is exerted on the plane surface. It is acted upon by gravity. The force exerted on the surface is calculated by applying the formula,

F = mass x acceleration due to gravity

Assumme acceleration due to gravity is 9.8m/s^2, then

Force = 7 x 9.8 = 68.6N

The surface exerts an opposite force of the same magnitude with the force of the object but in opposite direction. Since it is inclined at an angle of 36.9 degrees,

Normal force = mgCosθ = 68.6Cos36.9 = 54.86N

Recall, frictional force = normal reaction x coefficient of friction

Given that coefficient of kinetic friction = 0.35,

Frictional force = 54.86 x 0.35 = 19.201N

This is the force that must be overcome to keep the object moving.

The force pulling the object upwards along the inclined plane is

mgSinθ = 7 x 9.8 x Sin36.9 = 41.19N

Since the velocity is constant, it means that there is no acceleration. The net force is zero. The force required to pull the mass and make it move at constant velocity must be equal to the sum of the exerted force and the the frictional force(Since it involves coeffricient of kinetic friction, it would cause the object to keep moving)

Thus,

Required force = 19.2 + 41.19 = 60.4N

Option E is correct

8 0
1 year ago
According to Ohm’s law, which combination of units is the same as the unit for resistance? volt ÷ ampere ampere × volt volt + am
Maksim231197 [3]

Answer:

volt ÷ ampere

Explanation:

The mathematical form of Ohms law is given by :

V = IR

Where V is voltage

I is current

R is resistance

R=\dfrac{V}{I}

The unit of voltage is volt and that of current is ampere

Unit of resistance :

R=\dfrac{\text{volt}}{\text{ampere}}

So, volt ÷ ampere is the same as the unit of resistance. Hence, the correct option is (a).

6 0
2 years ago
Read 2 more answers
PLEASE HELPPPP ME WITH THIS
lozanna [386]
I am not so sure about this it is too difficult
4 0
3 years ago
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