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Two scales on a voltmeter, which is constructed from a galvanometer, measure voltages up to 20 V and 30 V respectively. The resistance connected in series with the galvanometer is 1679 for the 20 scale and 2937 for the 30 scale.
Determine the internal resistance of the galvanometer.
My flashlight beam makes an angle of 60° with the surface of the water before it enters the water. what angle does the beam make with the surface
By what fraction does your mass increase when you and your car travel down the highway at 70 mph
The half-life of Uranium(238 upper index 92 lower index) against alphy decay is 4.5x10^9 yr. How long does it take for seven-eigths of a sample of this isotope to decay
A 160 kg hoop rolls along a horizontal floor so that the hoop's center of mass has a speed of 0.170 m/s. How much work must be done on the hoopto stop it?
A 8000-kg car is traveling at 1.7 m/s along a horizontal road when the brakes are applied. How much kinetic energy does the car lose
A camera with interchangeable lenses is used to photograph a distant object. The angular size of the object is 19 degrees. What is the longest focal length lens
A square wire 2.0 cm on each side is oriented so that a 5.00 mT magnetic field makes a 30.0 degree angle with the normal to the plane of the square. how many loops does the wire make
A human eyeball is about 2.1 long, and the pupil has a maximum diameter of about 7.5 . What is the "speed" of this lens
my kids came up with a form of tether ball where they attached a ball to a string and let it swing around the role.
a laser with wavelength d8 is shining light on a double slit with slit separation 0.350mm . this results in an
two particles one with charge -1.25 oc and one with charge 1.87 ?c are 8.09 centimeters apart. what is the magnitude of
Three identical masses of 460 kg each are placed on the x axis. One mass is at = -100 kg , find the magnitude of the net gravitational force on the mass
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