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A string 40.0 cm long and fixed at both ends of a musicalinstrument oscillates in its n= 1 mode. The speed of waves onthe string is 233m/s, and the speed of sound in air is 348m/s.
a. What is the frequency of the emitted soundwave?b. What is its wavelength?
A projectile is fired straight upward from the Earth's surface at the South Pole with an initial speed equal to one third the escape speed. What is the altitude of the projectile at this instant
a star of radius 7.8 times 105 km rotates about its axis with a period of 66 days. the star undergoes a supernova
A solenoid has a cross-sectional area of 5.8 x 10-4 m2, consists of 330 turns per meter, and carries a current of 0.41 A. Find the average current induced in the coil
When a voltage difference is applied to a piece of copper wire, a 5.0 mA current flows. If the copper wire is replaced with a silver wire with twice the diameter of the copper wire
A solid aluminium cube 20 cm on an edge floats face-down onmercury. How much higher on the cube's sides will the mercury level be
A small object of mass 3.30 g and charge-24 µC "floats" in a uniformelectric field. What is the magnitude and direction of the electric field
37.43 J of heat are removed from a gas sample while it is being compressed by a piston that does 23.12 J of work. What is the change in internal energy of the gas
The nucleus of platinum is a uniformly charged sphere with a chargeof 78e and a radius of 7.00 x 10^-15 What is the electric potential energy of an incident proton arriving at the nuclear surface
In each cycle of its operation, a refrigerator removes 17J of heat from the inside of the refrigerator, How much work per cycle is required to operate this refrigerator
A 860 ? resistor is connected to a variable-voltage power supply. What current flows in the resistor when the voltage is 15 V?
q1. a toolbox is carried from the base of the ladder at point a. the toolbox comes to a rest on a scaffold 5.0 m above
a scout walks 4.5 km due east from camp then turns left and walks 4.05 km along the arc of a circle centered at the
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