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A capacitor with a capacitance of C is charged with charge of magnitude Q on each plate. The capacitor is then connected to a voltmeter that has an internal resistance of R.
A) Find the current through the voltmeter just after the connection is made?
B) Determine what is the time constant of this RC circuit?
the nucleus of a helium atom contains two protons that are approximately 2.0 fm apart. how much work must be done by an
The second-order dark fringe in a single-slit diffraction pattern is 1.40 mm from the center of the central maximum. Calculate the wavelength of the incident light
electrons ( mass m, charge -e) are accelerated from restthrough a petential difference V and are then deflected by amagnetic field B(vector) that is perpendicular to theirvelocity. What is the radius of the resulting electron trajectory
A heat engine absorbs 47.0 kJ and exhausts 36.0 kJ of heat each cycle. Calculate its efficiency. What is the work done per cycle
A 45.0-kg girl is standing on a 133-kg plank. The plank, originally at rest, is free to slide on a frozen lake, which is a flat, frictionless surface. What is her velocity relative to the surface of ice
The odometer (mileage gauge) of a car tells you the number of miles you have driven, A typical midsize car has tires 24.0 inches in diameter. How many revolutions of the wheels must the odometer count in order to show a mileage of 0.100 mile
A 64-kg man standing on a scale in an elevator notes that as the elevator rises, the scale reads 834 N. What is the acceleration of elevator.
The magnetic field of an electromagnetic wave in a vacuum is B_ z = ( 4.0mu T )sin( 1.0×107 x - 2 pi f t) , where x is in m and t is in s. what is the wave's electric field amplitude
A box of mass 2.1 kg is on a horizontal surface. The coefficient of friction between the box and the surface is 0.32. Find the acceleration of the box
A woman throws a ball at a vertical wall d = 3.6 m away. The ball is h = 1.8 m above ground when it leaves the woman's hand with an initial velocity of 10 m/s at 45°. How long was the ball in the air after it left the wall
Suppose the image of an object is upright and magnified 1.69 times when the object is placed 14cm from a lens
A rod of length 30.0 cm has linear density (mass per length) given by: ?= 50.0 + 20.0x. What is the mass of the rod
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