If a metal ball strikes a pendulum and sticks to it. It will have a relationship for conservation of momentum of m*v = (m + M) *V (m and v are the mass and initial velocity of the projectile, M is the mass of the pendulum with no initial velocity and big V is the combined velocity of the pendulum and projectile). The conse ...continues
On an incline a 2.00 kg block is released 4.00m from a long spring with a force constant k= 60.0 N/m that is attached at the bottom of the incline. The incline makes the angle of 53 degrees with the horizontal, and the coefficients of friction between the block and the incline are u static = .40 and uk= .20. a) what is the s ...continues
Problem. Two similar metal spheres are located at the same height from the earth surface. The first is pended on the end of a rod and the second is propped up (supported) by the similar rod. Both are heated with the same quantity of heat Q. Will the temperatures of these two spheres be equal? If not, the temperature of which ...continues
Problem. Two similar metal spheres are located at the same height from the earth surface. The first is pended on the end of a rod and the second is propped up (supported) by the similar rod. Both are heated with the same quantity of heat Q. Will the temperatures of these two spheres be equal? If not, the temperature of which ...continues
A wheel on a grinder is a uniform 0.9kg disk of 8cm radius. It coasts uniformly to rest from a speed of 1400rpm in a time of 35s. How large a friction torque slows its motion?
A tourist drops a 1-liter water-filled balloon from the top of a monument (170m high). If air resistance is negligible and almost all the motion energy heats the water, find the increase in temperature of the water when it hits the pavement. (hint: equate mgh in joules to the quantity of heat mc(change)T and express c, the sp ...continues
Which gas molecule moves faster?
In a mixture of hydrogen and oxygen gases at the same temperature, which molecules move faster and why? This is a question from a CONCEPTUAL physics class (no mathematical explanation please) in the chapter Heat Transfer
water evaporates from a salt solution and leaves behind salt crystals that have a higher degree of molecular oreder than the more randomly moving molecules in the salt water. Has the entropy principle been violated? why or why not? this is for a CONCEPTUAL physics class.
A 6.0 kg block is pushed 8.0 m up a rough 37 degree inclined plane by a horizontal force of 75N. If the initial speed of the block is 2.2m/s up the plane and a constant kinetic friction force of 25N opposes the motion, calculate the initial kinetic energy of the block, the work done by the 75N force, the work done by the frictio ...continues
A pendulum of mass M is attached to a string of length L. The other end of the string is attached to pivot point P. The string and mass are held horizontal and released so that the mass swings down. When the mass is at its lowest point, the string hits a nail a distance h above the mass, so that the mass loops around the nail. ...continues
