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A solid aluminum in got weighs 92 N in air.(a) What is its volume?(b) The ingot is suspended from a rope and totally immersed in water. What is the tension in the rope (the apparent weight of the ingot in water)?
In an advanced laboratory class a student performs the photoelectric experiment. What is Planck's constant based on this measurement
An ideal refrigerator does 140 J of work to remove 585 J of heat from its cold compartment during each cycle. How much heat per cycle is exhausted to the kitchen
A certain peculiar spring is found not to conform to Hooke's Law. Compute the work done in stretching the spring from x = 0.5 m to x = 1.0 m
Two point charges q1 = 4.0 ?C and q2 = -8.0 ?C are placed along the x-axis at x1 = 0 m and x2 = 0.20 m, What is the electric potential energy of this system of charges
A subway train has a sound intensity level of 90 dB, and a rock band has a sound intensity level of 110 dB. How many times greater is the sound intensity of the band than that of the train
Two forces act on a car. Force A is 120 N, west and force B is 200 N at 60° N of W. What is the direction of the resultant force on the car
Two long, parallel wires, each having a mass per unit length of 40 g/m, are supported in a horizontal plane by strings 6.00cm long. When both wires carry the same current I.
A hydrogen atom initially in its ground state (n=1) absorb a photon and ends up in the n=3 state. what photon energies could the atom emit
A copper-constantan thermocouple generates a voltage of 4.55 10-3 volts when the temperature of the hot junction is 103.4° C, what is the temperature of the hot junction when the voltage is 1.94 10-3 volts
A large cylindrical water tank of diameter od D=3.00 m. What is the flow speed of the water when it comes out from the hole
A proton in the upper atmosphere moves at 8.6×105m/s , perpendicular to Earth's magnetic field, Find the curvature radius of the proton's trajectory
a typical hard drive in a computer spins at 5400rpm. what is the period in seconds
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