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A tennis ball is struck at the base line of the court, 11.5 m from the net. The ball is given an initialvelocity with a horizontal component equal to 27.0 m/s at an initial elevation of 1.21 m.
a) What vertical component of initial velocity must be given to the ball, such that it barely clears the 1.00 mhigh net?b) How far beyond the net will the ball hit the ground?
In a period of 1 s, 4.00 x10^23 nitrogen molecules strike a wall with an area of 6.30 cm2. If the molecules move with a speed of 300 m/s and strike wall head-on in elastic impacts, what is the pressure exerted on the wall? (The mass of one N2 mole..
Coil 1 has L1 = 47 mH and N1 = 104 turns. Coil 2 has L2 = 68 mH and N2 = 215 turns. what mutually induced emf appears in that coil
A 35.0-mH inductor has a reactance of 1.80 k. What is the frequency of the ac current that passes through the inductor
A ball is launched straight up with a speed of 15.13 miles per hour. What is the maximum height reached in meters
From the top of a 40.0m high cliff, two rocks are simultaneously thrown. One is thrown upwards at 20.0m/s, the other is thrown downwards at 8.0 m/s. How far apart are the two rocks after 1.5 seconds?
One January morning, a warm chinook wind rapidly raised the temperature in Spearfish, South Dakota, from below freezing to +11.1° C. Find the average speed at which its height would decrease
A 50 kg person stands at the edge of a 7.4 m diameter circular platform, which is mounted horizontally on frictionless bearings and has a total mass of 300 kg. What is the magnitude of the speed of the person (in m/s) with respect to the ground
Radioactive decay of granite and other rocks in the Earth's interior provides sufficient energy to keep the interior molten, heat lava, and supply warmth to natural hot springs.
A rod (length = 80 cm) with a rectangular cross section (1.5 mm ? 2.0 mm) has a resistance of 0.20 ?. What is the resistivity of the material used to make the rod
A wave has an angular frequency of 190 rad/s and a wavelength of 2.6 m. Calculate (a) the angular wave number and (b) the speed of the wave.
A charge Q is uniformly distributed throughout a nonconducting sphere of Radius R. What is the magnitude of the electric field at a distance of R/2 from the center of the sphere? What is the magnitude of the electric field at a distance of 2R from th..
A certain type of laser emits light that has a frequency of 6.0 × 1014 Hz. The light, however, occurs as a series of short pulses, each lasting for a time of 2.8 × 10-11 s. How many wavelengths are there in one pulse
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