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A uniform hollow ball is released from rest at the top of a hill of height H.
Calculate its forward linear speed (in terms of H) at the base of this hill if there is no friction on the hill.
Calculate its forward linear speed (in terms of H) at the base of this hill if the hill is rough enough therefore that the ball rolls without slipping.
To test the quality of a tennis ball, you drop it onto the floor from a height of 4.00 m. What is the magnitude of its average acceleration during the contact with the floor
The loop consists of a single turn of flexible conducting wire that is wrapped around a flexible mount such that the dimensions of the rectangle can be changed.
A two-stage rocket accelerates from rest at +3.27 m/s^2 for 6.82seconds. It then accelerates at +2.98 m/s^2 for another 5.90seconds. After the second stage, it enters into a state of freefall.
Caught in an avalanche, a skier is fully submerged in flowingsnow of density 96kg/m^3. What percentage of the gravitational force on the skier
An electric fan is rotating about a fixed axis with an initial angular velocity of 0.260 rev/s. Find the angular velocity of the fan after time 0.195sec has passed
The concept of thermionic emission is the basis of modern X-ray tubes, which are the workhorse of a medical X-ray image. In this process a filament (a piece of metal in a vacuum) is heated by the application of electrical current.
Consider the Hydrogen atom with its electron in the 1s ground state. What is the probability of finding the electron between 1.1 a0 and 2.7 a0 distances from the proton
A hollow cylindrical tube of 2.5 m long is open at one end and closed at the other end. What is the linear distance between a node and the adjacent antinode for the third harmonic in this pipe?
A Two balloons of identical volume (radius 11.5 m) are filled with gas. The first with helium, the second with hydrogen (H2) gas. What is the lift created by each one
An unknown resistor is connected between the terminals of a 7.50 V battery. Energy is dissipated in the resistor at the rate of 0.510 W. At what rate is energy now dissipated
wo stunt drivers drive directly toward each other. At time t=0 the two cars are a distance D apart, car 1 is at rest, At what time do the two cars collide
a 120-v motor has mechanical power output of 2.50 hp. it is 90 efficient in converting power that it takes in by
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