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Question1
How much 235U is consumed per year (in g/y) to produce sufficient electricity to continuously run a 100-W light bulb? How much coal (in g/y) would be essential (coal has a heat content of about 12 GJ/tom)? Assume a conversion efficiency of 33 percent of thermal energy into electrical energy.
Question2
A 0.20 kg stone is held 1.3m above the top edge of water well and then dropped into it. The well has a depth of 5.0m. Relative to the configuration with the stone at the top edge of the well, what is the gravitational potential energy of the stone-Earth System?
(a) Before the stone is released and
(b) When it reaches bottom of the well?
(c) What is the change in gravitational potential energy of system from release to reaching the bottom of the well?
A plane leaves the airport in Galisto and flies 159km 68 degrees east of north and after that changes direction to fly 242km at 48 degrees south of east, after which it makes an immediate emergency landing in a pasture.
Electron acquires 5x10^-16 kinetic energy when it is accelerated by an electric field from Plate A to Plate B, what is the potential difference Vba between the two plates
The large blade of a helicopter is rotating in a horizontal circle. The length of the blade is 6.64 m, Find the ratio of the centripetal acceleration at the end of the blade to that which exists at a point
Suppose you walk into a sauna that has an ambient temperature of 50.0 C. Calculate the rate of heat transfer to you by radiation given your skin temperature is 37.0 C
The velocity of the car at the end of the fifteen-second period is +20.6 m/s. The ratio of the average acceleration values is a1/a2 = 1.50. Find out the velocity of the car at the end of the initial ten-second interval.
A particle with a mass of 1.00 10-5 kg and a charge of +2.3 µC is released in a (parallel-plate) uniform horizontal electric field of 16 N/C. A. How far horizontally does the particle travel in 0.46 s
A fish hanging from the bottom of the spring oscillates vertically at a frequency of 2.80{Hz}. Illustrate what is the mass of the fish, ignoring the mass of the spring.
In molecular hydrogen, H2, two hydrogen atoms are bonded covalently by sharing two electrons. Determine the electric force acting on each proton
The coefficient of static and kinetic frictions between a 3 kg box and a desk are .4 and .3 respectively. What is the net force on the box when a 10 N horizontal force is applied to the box
A circular loop of radius 2.58 cm contains 65 turns of tightly wound wire. what torque acts on the loop
What is the longest wavelength of light that can be absorbed by a hydrogen atom that is initially in the first excited state
What is the magnitude of the shell's acceleration just after it is released? What is the speed of the shell at this time
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