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A person enters a tall tower, needing to know it's height. He notes that a long pendulum extends from the ceiling almost to the floor and that its period is 14.2 s.
(a) If this pendulum is taken to the Moon, where the free-fall acceleration is 1.67 m/s2 what is it's period there?
s
(b) How tall is the tower?
m
A quarter-pound hamburger with all the fixings has a mass 210g . The food energy of the hamburger is 2.4MJ. What is the energy equivalent of the mass of the hamburger
A hypothetical planet has a mass one-third of and a radius three times that of Earth. What is the acceleration due to gravity on the planet in terms of g, the acceleration due to gravity on Earth?
A car is designed to get its energy from a rotating flywheel (solid disk) with a radius of 1.50 m and a mass of 575 kg. Before a trip, Find the kinetic energy stored in the flywheel
A creamy salad dressing is made up of heavy cream, corn oil, and vinegar (as well as a pinch of dry mustard, salt and pepper). You put the cream, oil, and vinegar in a glass jar.
a square loop of wire of side 3.3 cm carries 3.0 a of current. a uniform magnetic field of magnitude 0.67 t makes an
A hunter aims directly at a target (on the same level) 150 m away. If the bullet leaves the gun at a speed of 240 m/s, by how much will it miss the target
A small, plastic sphere of mass m = 111 g is attached to a string There is an electric field of 122 N/C directed along the + x axis
A 6.0-V battery is connceted in series with a 29-mH inductor, a 110-Ω resistor, and an open switch. After the switch is closed, how much time will elapse before the current in the circuit will be equal to 12 mA?
In a ballistics test, a 23-g bullet travelling horizontally at 1300 m/s goes through a 40.0 cm-thick 450-kg stationary target and emerges with a speed of 900m/s. The target is free to slide on a smooth horizontal surface.
A line of charge with a non-uniform charge density =ay, where a=?400 nCm2 lies along the y axis in the region 0y110 m. What is the electric potential of this line of charge at point P
Three equal point charges, each with charge 1.25%u03BCC , are placed at the vertices of an equilateral triangle whose sides are of length 0.250m. What is the electric potential energy U of the system
A copper rod has a length of 1.7 m and a cross-sectional area of4.1 x10-4 m2. One end of the rod is incontact with boiling water and the other with a mixture of ice andwater. What is the mass of ice per second that melts? Assume that no heat is lo..
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