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1. A duck is floating on a lake with 22% of its volume beneath thewater. What is the average density of the duck?2. A 0.50 m multiplied by 0.50 m multiplied by 0.90 m block issuspended from a wire and is completely under water. What buoyant force acts on the block?
A point source of light is 200 cm below the surface of a body of water. Find out the diameter of the circle at the surface through which light emerges from the water.
An ideal refrigerator does 130 J of work to remove 655 J of heat from its cold compartment during each cycle. How much heat per cycle is exhausted to the kitchen
An electron is released from rest at the negative plate of a parallel plate capacitor and accelerates to the positive plate, What is the kinetic energy of the electron just as it reaches the positive plate
A 3.00 kg box is moving to the right with speed 10.0m/s on a horizontal, frictionless surface. At t= 0 a horizontal force is applied to the box. what distance does the box move from its position at t=0 before its speed is reduced to zero
Find out the time that the arrow spends in the air.
An L?R?C series circuit has phase angle -33.0?. What is the voltage amplitude across the resistor
A steel section of the Alaskan pipeline had a length of 67.6 m and a temperature of 16.1?C when it was installed. What is its change in length
What is the average force felt by a 0.06 kg tennis ball if it strikes the racket at a speed of 30m/s and leaves the racket with a speed of 50m/s in the opposite direction
A mode-locked, titanium-sapphire laser has a wavelength of 850 nm and produces 100 million pulses of light each second. What is the average power produced by the laser
The internal energy of a gas is 1000j. The gas is compressed adiabatically and it's volume deceases by 400cm^3. What is internal energy of gas
In a certain electroplating process gold is deposited by using a current of 14.0 A for 19 minutes. How many grams of gold are deposited by this process
A sphere completely submerged in water is tethered to the bottom with a string. What is the density of the sphere
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