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Starting from rest, a basketball rolls from the top of a hill to the bottom, reaching a translational speed of 6.6 m/s. Ignore fritional losses.
(a) What is the height of the hill?
(b) Released from rest at the same height, a can if frozen juice rolls to the bottom of the same hill. What is the translational speed of the frozen juice can when it reaches the bottom?
A loudspeaker emits energy at the rate of 53W, What is the intensity of sound 19m from the speaker
Determine the temperature at which the resistance of atungstenwire will be three timesits value at 20°C. Assume its coefficient of resistivity remains constant.
A 10 g bullet moving 1000 m/s strikes and passes through a 2.0-kg block initially at rest. The bullet emerges from the block with speed of 400 m/s. a.) How much energy was lost in the collision? b.) Calculate the average force exerted on the block as..
A heat engine takes in 126 kJ of heat from a reservoir at 820 K and exhausts 88 kJ to a reservoir at 292 K. What is the efficiency of an ideal engine operating between the same two reservoirs
A motor develops 0.75 kW of power at 2000 revs per 10 min. What torque is applied to the motor shaft
A clarinet has a fundamental frequency of 147 Hz, and, when played, has one end closed. How many harmonics appear below 1350 Hz
Point charges q1=? 4.10nC and q2=+ 4.10nC are separated by distance 3.20mm , forming an electric dipole, What is the direction of the dipole moment
A uniform rod of mass M and length L is sitting on a frictionless table. Describe the subsequent motion of the rod
Consider a line that is 1.4 m long. A moving object is somewhere along this line, but its position is not known. Find the minimum uncertainty in the momentum of the object
A new circus act features a large frictionless cannon with an 2500 N/m spring mounted at the bottom of a long barrel which makes an angle of 37.0o with the horizontal. Find the speed of the acrobat when he reaches the top of the barrel. Use energy ..
Two objects with masses 5.30 and 2.50 hang 0.800 above the floor from the ends of a cord 8.00 long passing over a frictionless pulley. Find the maximum height reached by the 2.50 object
A 150 MW laser pulse is focused with a lens to a diameter of 1.39 %u03BCm. What is the laser beam's electric field amplitude at the focal point
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