Answer:
Explanation:
initial height of the ball is given as
initial speed of the ball is given as
now we know that
now by energy conservation we can say
initial kinetic energy + initial potential energy = final kinetic energy + final potential energy
Answer:
Explanation:
Given data
Frequency fs=600 Hz
Velocity Vs=90 km/hr =25 m/s
Speed of sound v=343 m/s
To find
Frequency f heard by a person standing beside the road in front of the car
Solution
From Doppler's effect we know that:
Here Vs is negative as the source is moving towards listener
Answer:
b. increasing the number of turns per unit length on the solenoid
e. increasing the current in the solenoid
Explanation:
As we know that energy density depends on the strength of the magnetic field. The magnetic field strength depends on the no of turns of the solenoid and the current passing through it. The greater the number of turns per unit length, greater the current passing through it, more stronger the magnetic field is. As
B = μ₀nI
n = no of turns
I = current through the wire
So the right options are
b. increasing the number of turns per unit length on the solenoid
e. increasing the current in the solenoid
The right answer for the question that is being asked and shown above is that: "A. Compressions and rarefactions make up longitudinal waves, which can only travel in matter." The statement that best describes longitudinal waves is that c<span>ompressions and rarefactions make up longitudinal waves, which can only travel in matter.</span>
Answer:
Work is the change in energy and power is the rate of doing work.
