Mechanics | Relativity Answers

find an expression for the energy density in terms of stress and strain?

A sinusoidal wave is described by
y(x,t) = 0.4 sin 20.4( x − 95.5 t) cm
where x is the position along the wave propagation. Determine the amplitude, wave
number, wavelength, frequency and velocity of the wave.

When the pressure on a sphere is increasedby 80 atmospheres , its volume decreases by 0.01%. Find the bulk modulus of elasticity of the material of the sphere ?

A ball of mass 50 g is dropped from a height of 20m. A boy on the ground hits the ball vertically upwards with a bat with an average force of 200N, so that it attains a vertical height of 45m.The time for which the ball remains icontact with the bat is (Take g=10ms^-2)

Prove that the motion of a simple pendulum is simple harmonic motion. Also show that the time period of
simple pendulum of very large length is independent of length

Find an expression for the energy density in terms of stress and strain

A source and an observer move away from each other with a velocity of 10 m/s with respect to ground.If the observer finds the frequency of sound coming from the source as 1950 Hz, then actual frequency of the source is (velocity of sound in air =340 m/s): a)2132 Hz. b)1950 Hz. c)2486 Hz. d)2068 Hz.

what is the role of tension in string

What is the role of tension in wave motion.

The equation of a wave is represented by :y=10^-4sin(100t-x/10)m,then the velocity of the wave will be:
a)100 m/s b)1000 m/s c)4 m/s d)10 m/s.