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an energy storage system based on a flywheel a rotating disk can store a maximum of 40 mj when the flywheel is rotating
consider the following two events a concert begins in miami florida and 5 seconds later according to a clock at rest on
a small disk of radius r200 cm has been glued to the edge of a larger disk of radius r900 cm so that the disks lie in
a turntable rotates with a constant angular acceleration 220rads2 after a time interval 440s the wheel has rotated
in a grocery store a convex mirror with r 40 m is used for surveillance suppose a person of height 17 m is 12 m from
two point charges 318 microc and -550 microc are separated by 122 m what is the electric potential midway between
a fly appears to be upside down and 3 times its actual size when viewed through a converging lens with a focal length
a ball whose diameter is 6 cm is placed 70 cm in front of a convex spherical mirror if the focal length of the mirror
two parallel plates have a capacitance of 10 microf when they are 10 mm apart the plates are then fully charged by a 90
a 20 kg box of running shoes slides on a horizontal frictionless table and collides with a 10 kg box of ballet slippers
a thin film of alcohol n136 lies on a flat glass plate n151 when monochromatic light whose wavelength can be changed is
ground beef may be irradiated with high-energy electrons from a linear accelerator to kill pathogens in a standard
we know from experience that the doppler shift of sound from a moving car is easily detectable assuming light with a
a point source of sound that emits uniformly in all directions is located in the middle of a large open field the
find the minimum frequency a photon must have if it is to ionize the n 1 state of a doubly ionized lithium
two point masses m1 2 kg and m2 1 kg are connected by a thin massless rod of length l 2 m and are freely rotating in
a 55 kg person is at rest at the left end of a floating 180kg log it starts to run toward the other end with a velocity
white light with frequencies ranging from to is incident on a potassium surface the work function of potassium is 224
a at what angle should the axes of two polaroids be placed so as to reduce the intensity of the incident unpolarized
a 57 kg block attached to a spring executes simple harmonic motion on a frictionless horizontal surface at time t0s the
a light bulb has a resistance of 260 it is connected to a standard wall socket 120 v rms 600 hza determine the rms
a cannon tilted up at a 30deg angle fires a cannon ball at 65 ms from atop a 12 m high fortress wall what is the balls
a ray of light is incident on a flat mirror at an angle if we then rotate the mirror by 10deg while keeping the
60 cm3 of gasoline are mixed with 64 cm3 of water what is the average density of the mixture
suppose now that you are at rest relative to the raft standing at the rear end except this time the raft is in the