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One kilowatt-hour (kWh) is the amount of work or energygenerated when one kilowatt of power is supplied for a timeof one hour. A kilowatt-hour is the unit of energy used bypower companies when figuring you electric bill. Determine the numbner of joules of energy in one kilowatt-hour.
A shot-putter accelerates a 7.3 kg shot from rest to 14 m/s. If this motion takes 2.0 s, what average power was developed
A current of 7.37 A in a solenoid of length 14.8 cm creates a 0.369-T magnetic field at the center of the solenoid. How many turns does this solenoid contain
In a period of 1.0 seconds, 5.0 x 10^23 nitrogen moleculesstrike a wall of area 8.0 cm^2. find the pressure exerted on the wall
A car travels a straight road at 130 km/h for 30min then at 50 km/h for 10min . It then reverses and goes at 80 km/h for 20min . What is the average velocity for the entire trip? What is the average speed for the entire trip?
Two parallel plates, each with an area of 90.0cm^2 , are given equal and opposite charges of magnitude 0.200 uC. What is the dielectric constant
A long thin rod lies along the x-axis. One end is at x=2.00 m and the other at x=4.00 m. Calculate mass of the rod
The model rocket is fired vertically from rest. It has a net acceleration of 17.5m/s2. After 1.5s, its fuel is exhausted and its only acceleration is that due to gravity. how high does the rocket travel
A sealed container contains 7 moles of neon gas at STP. Estimate the number of neon atoms having speeds in the range from 188.0 m/s and 192.0 m/s
suppose the resistance between the hands is due entirely to the skin. what is the resistivity of skin
A9.0-V battery is connected to a capacitor, resulting in51.0µC of charge stored on the capacitor. How much energy is stored in the capacitor?
The potential at location A is 392 V. A positively charged particle is released there from rest and arrives at location B with a speed vB. The potential at location C is 780 V, and when released from rest from this spot, the particle arrives at B wit..
A bicycle racer is going downhill at 12.2m/s when, to his horror, one of his 2.42kg wheels comes off when he is 75.0m above the foot of the hill. How much total kinetic energy does the wheel have when it reaches the bottom of the hill
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