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What mass of water at 28.0oC must be allowed to come to thermal equilibrium with a 2.07-kg cube of aluminum initially at 1.50 x 102oC to lower the temperature of the aluminum to 63.9oC? Assume any water turned to steam subsequently recondenses.
It can be shown that an electromagnetic wave's energy is equally divided between the electric field and the magnetic field. What is the total energy density in an electromagnetic wave of intensity 850 W/m^2?
A solenoid made out of 3500 turns of a fine silver wire about a tube 1cm in radius has a potential drop of 3.2V at a current of 2A in the lab. What is the cross-sectional area of the wire
The coil of a generator has a radius of 0.16 m. When this coil is unwound, the wire from which it is made has a length of 5.8 m. What is the peak emf of this generator
Suppose you stand with one foot on ceramic flooring and one foot on wool carpet, making contact over an area of 80.0cm^2 with each foot. Carpet and ceramic are 2.00cm thick and are 10C on their bottom sides.
FOUR PEOPLE WITH A COMBINED MASS OF 300 KG ARE RIDING IN A 1100 KG CAR. WHEN THEY DRIVE DOWN A WASHBOARD ROAD WITH BUMPS SPACED 5.0M APART, HOW MUCH DOES THE CAR RISE UP ON ITS SPRINGS
You toss a racquetball directly upward and then catch it at the same height you released it 2.06 s later. Assume air resistance is negligible. What is the initial velocity of the ball
You are given a 9 V battery and three bulbs rated atrespectively (9V, 5 W), (9V, 2W), and (12 V, 6W). Assume that the battery has negligible internal resistance and that the three bulbsobey Ohm's law and convert energy to light with equaleffecienc..
A 3.40-kg object is attached to a spring and placed on frictionless, horizontal surface. Find the maximum acceleration of the object
A well-insulated electric water heater warms119kg of water from 20.0° C to47.0° C in33.0min. Find the resistance of its heating element
Consider a parallel-plate capacitor with .30m by .50m-rectangular plates separated from eachother by .010mm. this capacitor has a capacitance of 280nF, find the dielectric constant of this capacitor
A house has a floor area of 170 m2 and an outside wall that has an area of 42.5 m2. Find the magnetic flux through the wall if the wall faces north
A dietary Calorie is actually a kilocalorie (note that by convention a capital 'C' is always used to indicate a dietary calorie and a lower case 'c' is used otherwise). Given that 1 cal = 4.186 J express the average daily dietary intake of a person..
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