Other Physics Answers

If the velocity of sound in a solid is of the order 103 m/s, compare the frequency of the sound wave λ = 20 Å for (a) a monoatomic system and (b) acoustic waves and optical waves in a diatomic system containing two identical atoms (M=m) per unit cell of interatomic spacing 2.2 Å. 

A 1500 kg van with a velocity of 22 m/s 

is going east when it hits a solid concrete 

wall in 11 s. What is the net force applied on 

the car that stopped it

Compute the net potential energy of a simple Na+Cl- pair. The equilibrium distance between the ions is 0.28nm. The potential energy due to repulsion between electron sis given by Ur = β/r8  

Two moles of nitrogen are in a 3-liter container at a pressure of 5.0Í106 Pa. Find the average translational kinetic energy of a molecule.

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 How will you explain the relationship between the angle of release to the 

 height of the projectile? How about angle of release and range before it 

 reaches the farthest distance?

How will you compare the range (horizontal distance) travelled by the

ball at angles of 25º and 65º? How about at angles of 40º and 50º?

A basketball player throws the ball at different angles. At which of 

 the following angles will the ball achieve the maximum height when 

 the initial velocity given is the same for all the angles?

Ball A with a mass of 8 kg moves with a velocity of 3 m/s at a 90° angle and collides with a stationary Ball B with a mass of 6 kg. After the collision Ball A continues on at a velocity of 2 m/s at an angle of 60°. What is the velocity and angle of Ball B after the collision?

Object 1 moves at 30° angle with momentum of 30 kg m/s collides inelastically with object 2 moving at a 250° angle with a momentum of 50 kg m/s. What is the resulting magnitude and direction of the vector?