To solve this problem we will apply the concepts related to the Doppler effect. The Doppler effect is a physical phenomenon where an apparent change in wave frequency is presented by a sound source with respect to its observer when that same source is in motion. Mathematically it can be described as
The meaning of each of these variables is,
Velocity of detector
=Frequency of wave emitted by source
Velocity of source
v=Velocity of sound wave
=Frequency received by detector
Replacing we have that,
Therefore the correct option is e. 950Hz
Scientists assume the gravitational force as negligible as compared to other forces present in the an atom because its value would be very small. Gravitational force is directly proportional to the mass of an object so small mass would lead to small force as well which is true for an atom. As compared to the nuclear forces, it would have a very small value.
Answer:Resistor-Capacitor (RC) circuits, when driven by a voltage/current source, display a type of time-dependent charging or discharging since the charge from the capacitor goes through the resistor. When considering a discharging phase, the time-dependent voltage takes the form
Explanation:
Vt = Voe^-t/RC
Vt equal time dependent voltage
R is the resistance
C is the capacitance of the oscilloscope
Given
Area of capacitor equal to 0.1 * 0.002m
Distance between plates equal 1/1000 = 0.0001m
Vo = 100v supply voltage
Resistance R =:1000ohms
Vt time dependent voltage = 50V
To find capacitance C = Eo(A/d)
C = (8.85 * 10^-12)* (0.002/0.001)
C= 1.77 * 10^-11
Solving the equation Vt = Voe^-t/RC
t = 0.6931RC
t = 0.6931(1000)(1.77*10^-11)
t = 1.2*10^-9
t = 1.2ns
It will take the oscilloscope 1.2ns to reach 50V
Answer:
Displacement by cyclist is zero.
Explanation:
In the given question bicyclist is travelling in a rectangular track having P , Q and R edges.
The bicyclist starts from P and travel through Q and R and returned to P again.
We need to find its displacement.
We know displacement of a body is its difference between its initial position to final position.
Here in the given question the bicyclist returns to P again.
Therefore, total displacement by bicyclist is zero.
Hence, this is the required solution.
