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A ball is tossed from an upper-story window of a building. Theball is given an initial velocity of 8 m/2 at an angle of 20degrees below the horzontal. It strikes the ground 3.00s later.
a) How far horizaontally from the base of the building doesthe ball strike the ground?b) Find the height from which the ball was thrown.c) How long does it take the ball to reach a point 10m belowthe level of launching?
The index of refraction for crown glass is 1.512 at a wavelength of 660 nm (red), whereas its index of refraction is 1.530 at a wavelength of 410 nm (violet). what is the angle of refraction for each wavelength
typical household currents are on the order of a few amperes.a. if a 1.64 a current flows through the leads of an
A lead bullet initially at 26.4oC melts just upon striking a target. calculate the speed of the bullet upon impact
two positive point charges q 80 nc and q 45 nc are held at rest one directly above the other a distance 17 cm apart.
An asteroid of mass 2.3×10^5kg , traveling at a speed of 21km/s relative to the Earth, hits the Earth at the equator tangentially, estimate the percent change in the angular speed of the Earth
A supersonic jet passes directly overhead at an altitude of 12,930 m, traveling at 680 m/s, or mach 2. How much time elapses before you hear the sonic boom
An RL circuit has a 5 kO resistor and a 1 mH inductor. This circuit is driven by a 100 Hz sine wave with 1 V amplitude. What is the amplitude of the current in the circuit
An unpolarized light beam of intensity I = 14.0 W/m2 is directed along the x-axis and enters a sequence of three polarizers at normal incidence. Calculate the intensity of the light leaving the last polarizer
An astronaut travels to an alternate universe that contains infinite charged plane and no other charged objects. The astronaut observes that the electric field in this universe has a magnitude of 1.20 N/C everywhere and points directly away from the ..
q1. a rectangular container measuring 23 cm 52 cm 61 cm is filled with water. what is the mass of this volume of water
A dock worker applies a stable horizontal force of 79.0 {rm N} to a block of ice on a smooth horizontal floor. The frictional force is negligible. The block starts from rest and moves 14.0 {rm m} in the first 6.00 {rm s}.What is the mass of the bl..
you connect five identical resistors in series to a battery whose emf is 12.0 v and whose internal resistance is
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