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A hot-air balloon is ascending at the rate of 14 m/s and is 57 m above the ground when a package is dropped over the side.
(a) How long does the package take to reach the ground?
(b) With what speed does it hit the ground?
If the fish is at rest at the water's surface, what is the least amount of time in which the fisherman can raise the fish to the dock without losing it
If 0.2 kg of chai tea at 90 degrees C is poured into a 0.3 kg cglass cup(C=840 J/kg K) at 20 degrees C, what is the final temperature of the chai tea
Consider an RC series circuit. You measure R to be 918 ? and C to be 826 nF. What will the voltage across the capacitor be at this frequency
a cubic cardboard box of side a 0.430 m is placed so that its edges are parallel to the coordinate axes. there is no
In an ultrahigh vacuum system (with typical pressures lower than 10?7 pascal), find the number of molecules in a volume of 1.70 m3
a moto-cross rider is airborn after a jump. Each wheel of his bike has a rotational intertia of .760 kg m2, What will his (bike and all) angular speed be after the wheel stops
A 144-g baseball moving 29m/s strikes a stationary 5.25-kg brick resting on small rollers so it moves without significant friction. Determine the baseball's speed after the collision
A wheel with a radius of 0.25 m rolls without slipping on a level road at a constant speed of 1.1 m/s for 2.0 min
A circular wire loop of radius 0.50 m lies in a plane vertical to a uniform magnetic field of magnitude 0.40 T. If in 0.10 s the wire is reshaped from a circle to a square, but remains in the plane, what is magnitude of the average induced emf in t..
A coating is applied to a lens to minimize reflections. The index of refraction of the coating is 1.66 and that of the lens is 1.56. what is the largest wavelength that is minimally reflected
A transformer has 100 turns in its primary windings and 500 turns in its secondary winding. calculate the secondary voltage and current
black smokers are hot volcanic vents that emit smoke deep in the ocean floor. many of them teem with exotic creatures
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