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A capacitor initially with a voltage of 10v is connected to a voltmeter of internal resistance of 2 Mega Ohms . After a time of 4 sec the voltmeter reads 5.0 volts. What is the capacitance of the capacitor and whats us the current in the voltmeter when the voltage shown is 3 volts?
Sheena can row a boat at 3.10 mi/h in still water. She needs to cross a river that is 1.11 mi wide with a current flowing at 1.77 mi/h. Not having her calculator ready, what angle upstream should she have headed
A 4.00-m length of light nylon cord is wound around a uniform cylindrical spool of radius 0.500 m and mass 1.00 kg. How much work has been done on the spool
1.give the definition of electrical circuit. draw the simplest electrical circuit and mark the directions of electrical
A tennis ball of mass 57 g travels with velocity m/s toward a wall. After bouncing off the wall, What is the change in the momentum of the tennis ball
In a certain experiment, the pressure of a gas depends on the volume by P=alphaV^3+betaV^2, What is the work done on the gas
Heather and Jerry are standing on a bridge 56 above a river. Heather throws a rock straight down with a speed of 15. Jerry, at accurately the same instant of time, throws a rock straight up with the equal speed. Overlook air resistance.
An electric motor rotating a workshop grinding wheel at a rate of 93 rev/min is switched off. Assume the wheel has the constant negative angular acceleration of magnitude 2rad/s2.
On an air track, a 398.0 g} glider moving to the right at 2.05 m/s} collides elastically with a 501.5 g} glider moving in the opposite direction at 3.20 m/ s} .
Initially 1.300 mol of an ideal gas in a container occupies a volume of 2.50 l at a pressure of 3.30 atm with an internal energy U1 = 592.8 J. Find the heat added during this process
A laboratory technician drops an 83.5g solid sample of unknown material at a temperature of 100?C into a calorimeter. Compute the specific heat capacity of the sample
A particle of mass m in a three-dimensional harmonic oscillator of poterntial energy (m w^2 r^2)/2 has spectrum given by E=h bar w(2nr+l+3/2) where nr is the radial quantum number and l is the orbital angular momentum suppose the particle has charge ..
A nuclear power plant operates at 75 % of its maximum theoretical (Carnot) efficiency between temperatures of 650 C and 310 C. how much exhaust heat is discharged per hour
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