Physics Answers

Explain absolute temperature

Write ohm law

What is pauli sigma x matrix

Explain degree of freedom of diatomic gas.

Explain degree of freedom of monoatomic gas.

Two people are pushing a stalled car; the mass of the car is 1850 kg. one person applies a force of 275 N to the car, while the other applies a force of 395 N. Both forces act in the same direction. A third force of 560N also acts on the car, but in a direction opposite to that in which the people are pushing. This force arises because of friction and the extent to which the pavement opposes the motion of the tires. Find the acceleration of the car.

a man who with 55kg, on a skateboard. He had an initial speed of 2.77m/s when descending the stairs at a height of 2m. Calculate the man’s potential energy when his speed is 6m/s. 

You will place a mirror slightly behind each headlight to reflect as much light as possible onto the road ahead. 

A ball is kicked near the edge of a cliff with a horizontal velocity of 10 m/s. 

What is the velocity upon impact if it hits the ground after 2 secs? 

What is the horizontal displacement of the ball? 

 A boy ties a rope to a 30 kg object, as shown below. He pulls on the rope with a force of 150 N. The rope makes an angle of 20 degrees with the horizontal. The coefficient of friction between the object and surface is .12. Assume that the surface is horizontal and flat.

a.     Draw a free body diagram for the object.

b.     Calculate the weight of the object.

c.     Calculate the x and y components of the tension in the rope.

d.     Calculate the normal force acting on the object.

e.     Calculate the acceleration of the object.