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Question: The sound from a very high burst of fireworks takes 4.5 seconds to arrive at your eardrums. The burst occurs 1500m above you and traveled vertically through two stratified layers of air, the top one at 0 degrees Celsius and the bottom at 20 degrees Celsius. How thick is each layer of air?
A solenoid 95.0 cm long has a cross-sectional area of14.0 cm2. There are 1050 turns of wire carrying acurrent of 6.90 A. Calculate the magnetic field inside the solenoid
a metal rod is forced to move with constant velocity along two parallel metal rails, connected with a strip of metal at one end, At what rate is energy being transferred to thermal energy
A pendulum sweeps out an angle of 12.5° during its motion. How far does the pendulum bob (the ball at the end of the rope) travel
A clock has a second hand whose tip rubs against the inside of the glass cover. what is the minimum torque that must be applied to the second hand
A certain kind of glass has an index of refraction of 1.640 for blue light of wavelength 440 nm and an index of 1.595 for red light of wavelength 670 nm. If a beam containing these two colors is incident at an angle of 30.0° on a piece of this glass,..
A research submarine has a 10-cm-diameter window that is 8.7cm thick. What is the submarine's maximum safe depth in salt water
T thin lense with a focal length of 50 cm is placed 100 cm from an object. How far behind the lense should we place a screen
A 10.0-uF capacitor, a 40.0-uF capacitor, and a 100.0-uF capacitor are connected in parallel across a 12.0v battery. what is the equivalent capacitance of the combination
Estimate the volume of water in the world's oceans in cu km, assuming a mean depth of water of 4 km. How deep would the water be were it stored entirely as ice on the continents?
A layer of transparent plastic (n = 1.63) on glass (n = 1.52) looks dark when viewed in reflected light whose wavelength is 576 nm in vacuum. Find out the two smallest possible nonzero values for the thickness of the layer.
A military helicopter on a training mission is flying horizontally at a speed of 90.0m/s when it accidentally drops a bomb (fortunately, not armed) at an elevation of 390m. How far does it travel horizontally while falling
A heat engine operates between a hot resrvoir at 1500k and a cold reservoir at 500k. Determine the Carnot efficiency of this engine
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