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In an emergency, you need to run a radio that uses 39.3 W of power when attached to a 16.0 V power supply. The only power supply you have access to provides 25.0 kV, but you do have a large number of 35.0 ? resistors. If you want the power to the radio to be as close as possible to 39.3 W, how many series resistors should you use?
A 9.0W laser beam shines on an ensemble of 1024 electrons, each in the ground state of a one-dimensional infinite square well 0.82nm wide. How many electrons can be so excited if the beam shines for 5.0ms
Ten meter long steel railroad rails are laid end to end, with no space between, on a hot day when the temperature is 115.°F. How much space now exists between each rail
What is the mass of the liquid in the vat.
Alpha particles (charge = +2e, mass = 6.68* 10^-27 kg) are accelerated in a cyclotron to a final orbit radius of 0.50 m. Determine the kinetic energy of an alpha particle in the final orbit
Two unequal masses are hung from the ends of a rope that runs over a pulley. What is the acceleration of the smaller mass
An inquisitive physics student and mountain climber climbs a 55 m cliff that overhangs a calm pool of water. At what time after release of the first stone will the two stones hit the water
The dry weight of a man is 845 N. When he is submerged underwater, the reading on the scale is only 43.2 N. What is the density of the man
Calculation of the ground state of one-dimensional harmonic oscillator using variational Monte Carlo method and How do you know the minimization is good enough?
You measure the activity of a radioactive sample, then wait a few days and measure it again. What is the half-life of the substance
A 0.2kg steel ball is dropped straight down onto a hard horizontal floor and bounces straight up. Determine the magnitude of the impulse delivered to the floor by the steel vessel
If the balloon can barely lift an additional 2900N of passengers, breakfast, and champagne when the outside air density is 1.23kg/m3, FIND the average density of the heated gases in the envelope
A 3.1 kg block slides down a frictionless ramp, What is the speed of the block when it leaves the ramp and What is the speed of the block when it hits the ground
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