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How much work would be required to move a +50e-6 test charge from a point midway between them to a point closer to either of the charges?
On planet Tehar, the free fall acceleration is the same as that on Earth but there is also strong downward electric field with the field being uniform
A hot body cools from 90 degree celcius to 80 degree celcius in 5 minutes when placed in a room of temperature 30 deg C
Show that the decrease of amplitude is the same for each cycle of oscillation.
The air temperature above coastal areas is profoundly influenced by the large specific heat capacity of water. How large of a volume of air can be cooled
A person removes a 10.5 kg stereo amplifier from a shelf that is 1.82 m high. The amplifier is lowered at a constant speed to a height of 0.75 m.
Find by integration its moment of inertia about an axis perpencicular to the rod at its center of mass.
Consider a 2-level system with an energy splitting between the upper and lower level. Using Boltzmann statistics, show that the heat capacity of the 2-level
A 1.0x10^-3 kg spider is hanging vertically by a thread that has a Young's modulus of 4.5x10^9 N/m^2 and a radius of 13x 10^-6.
If the object barely floats, with the top surface ot the wood level with the surface of the water, find the ratio of the volumes, Vw/Va.
A piece of glass has a temperature of 85.4C. Liquid that has a temperature of 43.0C is poured over the glass, completely covering it, and the temperature
Assuming the block slides back down the plane, how fast will it be going when it returns to the bottom?
A 2-kW baseboard electric resistance heater in a vacant room is turned on and kept on for 15 min. The mass of the air in the room is 75 kg, and the room
The generator at a power plant produces AC at 24,000 Volts. A transformer steps this up to 345,000 Volts for transmission over power lines.
The specific heat of a gas at a constant pressure is 1.70 times the specific heat at a constant volume. Find the specific heat at a constant pressure.
A box is given a push so that it slides across the floor. How far will it go, given that the coefficient of kinetic friction is 0.190 and the push imparts.
If the block, after coming to rest at B, slipped along BC, what is the velocity at C. ignore the friction along the surface BC and assume the bottom.
Spy balloon is to be constructed of a material with a mass of 0.5kg. it will be filled with helium and must be able to carry and instrument payload
A 270g metal block initially at 97°C is put into an 43g aluminum cup containing 195 g of water at 25°C. The specific heat of aluminum is 0.22 cal gl °CI.
On a frozen pond, a 10.6 kg sled is given a kick that imparts to it an initial speed of V(0) = 1.73 m/s.
A 276 kg piano slides 4.02 m down a 30.2° incline and is kept from accelerating by a man who is pushing back on it parallel to the incline.
A simplified representation of the diesel cycle, with just air as the working substance. Show that the efficiency of the engine is:
Calculate the entropy change for each of the following:
A car can accelerate from rest to 25 m/sec in 12 seconds on a level road. The weight of the car is 10,000 newtons.
The initial speed of the skier is 6.6 m/s. After coasting a distance of 1.9 m up the slope, the speed of the skier is 4.4 m/s.