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A 500 watt heater is used to heat water in a plastic bucket. Assume that 90% of the heat produced by the heater goes into heating the water. How long does it take to heat 2 kg of water from 25 degrees C to 100 degrees C? (Specific heat of water is 4200 Jkg-1K-1)
An AC voltage of the form ?v = 100 sin 1 000t, where ?v is in volts and t is in seconds, is applied to a series RLC circuit. Find the average power delivered to the circuit
An object falls off of a pier and into the ocean (sea water) where it displaces a total volume of 1.6 cubic meters of sea water. What is the buoyant force acting on the object
A neuron is stimulated with an electric pulse. The actionpotential is detected at a point 3.4 cm down the axon, .0052slater. What is the speed of the electric pulse along the axon
The rms speed of the molecules in 1.5g of hydrogen gas is 1800m/s . A:What is the total translational kinetic energy of the gas molecules, what is the rms speed of the molecules
A simple pendulum has mass 1.28 kg and length 0.600 m. What is the period of the pendulum near the surface of Earth
An arrow is shot off the top of a bridge of unknown height. The speed of the arrow at launch is known to be 30.0 m/s. How tall is the bridge
a helium nucleus has radius rhe 1.9 fm mass m 6.6 times 10-27 kg and charge 2e. a gold nucleus has charge 87e and
a passenger on the ferris wheel with a radius of 6.00m drops his keys when he is on the way up and at the 10 oclock
The work function of a certain metal is 3.00 eV. What is the kinetic energy of a photoelectric in both "J" and "eV" for an incident photon of wavelength 400.0 nm
A 7 kg sled is initially at rest on a horizontal road. determine the change in the kinetic energy of the sled
a gymnast is performing a floor routine. In a tumbling run she spins through the air, How much time does this maneuver take
A jetliner, traveling northward, is landing with a speed of 65m/s. Once the jet touches down, it has 715 m of runway in which to reduce its speed to 6m/s
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