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A pendulum of length L=2m, mass m=1 kg, is released from rest, when the cord makes an angle of 45 degrees with the vertical
A ceiling fan with 60 centimeter diameter blades is turning at 65 rpm. Obtain the speed of the tip of the blade 14 seconds after the fan is turned off
A convex lens of focal length 5 centimeter is used as a magnifying glass. Obtain at what distance from a tiny insect should you hold this lens to get a magnification of +4.4
The Hamiltonian of a system of two (spin- 1/2) electrons, H= ?1?z1+?2?z2 where ?z is the Pauli Matrix, ? is an energy parameter and our subscripts represent the two electrons 1 and 2. What is the basis where this Hamiltonian is diagonal and what is t..
A 10-? reistor is connected to a 120-V ac power supply. What is the peak current through the resistor
If there is no change in the power of the engine, and no change in the resistive forces acting on the car, estimate what is the new speed of the car on hill
An express subway train passes through an underground station. How long is the nose of the train in the station
A current of 2.50 A passing through a heating coil immersed in 180 g of paraffin (specific heat capacity 2.00 jg^-1K^-1) raises the temperature from 5 c below room temperature to 5 c above room temperature in 100 seconds
A small block with mass 1 kg slides in a vertical circle of radius 0.5 m on the inside of a circular track. how much work is done by the friction force on the block
A balloon is rubbed with a wool glove. The two items attract one another with a force of strength 0.6 N, How many electrons were transferred
A chemistry student with a mass of 75 kg is riding a steadily moving Ferris wheel. What is the magnitude of the normal force on her body
A dog running in an open field has components of velocity v, = 2.6 m/s and Vy = -1.8 m/s at t, = 10.0 s. For the time interval from f, = 10.0 s to 12 = 20.0 s, the average acceleration of the dog has magnitude 0.45 m/s2 and direction 31.00 measure..
a uniform rod of length 0.820 m and mass 13.0 kg is balanced on a sharp edge at 0.660 m from the left end. at the left
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