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A 1.25 kg iron block is placed in a 118 g aluminum inner calorimeter containing 2.63 kg of water at 18.1oC. The final temperature of the system is 57.4oC. What is the initial temperature of the iron block?
A rectangular coil with dimensions of 8.0 cm × 10 cm is dropped from a zero magnetic field position to a 1.4 T magnetic field in 0.10 s. What is induced emf in the coil as a result of this
A speaker generating a tone at 348 Hertz is stationary. A person is moving toward the speaker with a speed of 32 meter per second. Find the frequency of the tone perceived by the person
A coil of is wrapped tightly around the outside of the solenoid, so it has virtually the same radius at the solenoid. What is the mutual inductance
The wing of an airplane has an average cross-sectional area of 13 m2 and experiences a lift force of 91,000 N. What is the average difference in the air pressure
In the Bohr model of the hydrogen atom, the electron in the n = 16 level moves in a circular orbit of radius 1.35 x 10-8 meter around the proton. Determine the angular speed of the electron's motion
consider a heavy crate resting on the bed of a flatbed truck. when the truck accelerates the crate also accelerates and
a harmonic wave is traveling along a rope. it is observed that the oscillator that generates the wave completes 43.0
A stream moving with a speed of 0.8 m/s reaches a point where the cross-sectional area of the stream decreases to one-half of the original area
A 28kg rock approaches the foot of a hill with a speed of 15 m/s. Use energy conservation to find the max height above the foot of the hill reached by the rock
The force required to stretch a Hooke's-law spring varies from 0 N to 76.4 N as we stretch the spring by moving one end 14.6 cm from its unstressed position. Find the work done in stretching the spring
A 1000 kg aircraft going 25 m/s collides with a 1500 kg aircraft that is parked and they stick together after the collision. how far did they skid
A 150.00 kg rocket moving radially outward from Earth has a speed of 3.70 km/s when its engine shuts off 200 km above earths surface. (a) assuming negligible air drag, find the rockets kinetic energy when the rocket is 1000 km above Earths surface..
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