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A sound wave traveling at 342m/s is emitted with the foghorn of a tugboat. An echo is heard 3.80 s later. How far away is the reflecting object?
An archer shoots arrows at a target. Some of the arrows stick inthe target, while others bounce off. Assuming that the masses ofthe arrows and the velocities of the arrows are the same, whicharrows produce a bigger impulse on the target? Hint: Draw a..
An unknown nucleus has twice the volume of a nucleus with 62 nucleons. What is the atomic mass number of the unknown nucleus
The archerfish successfully shoots down the resting insect by spitting water drops at the same angle 60^circ above the surface and with the same initial speed v as before. At what height h above the surface was the insect.
A caterpillar climbs up a one-meter wall. For every 3 cm it climbs up, it slides down 1 cm. It takes 10 minutes for the caterpillar to climb to the top. Compute the speed at which the caterpillar travels.
two sources produce coherent light waves that come together at a detector located 6.50000 mm from one source and
Starting from rest a 5 kilogram crate slides 0.8 meter down a frictionless ramp (making an angle of 25 degree to the floor). Use energy principles to calculate the speed of the crate at the bottom of the ramp
A lab uses a beam of electrons to probe the structure ofprotons and neutrons held in a target vessel. How many electrons strike the target each second
A stone is thrown directly upward at 15.0 from ground level and feels no appreciable air resistance. make Use of the work-energy theorem to find how high it will be when its speed has been reduced to half of its initial value.
A capacitor has parallel plates of area 12cm^2separated by 2.5 mm. The space between the plates is filled with polystyrene (K=2.6,Em=2.0*10^7 V/m). Find the permittivity of polystyrene
A heat engine operates between a cold reservoir at 10 C and a hot reservoir at 200 C. how much heat must be exhausted as waste
A 5.20 g charcoal sample from anancient fire pit has a 14C activity of 63.0disintegrations/min. How old is the charcoal sample
A 1200-turn coil of wire 2.30cm in diameter is in a magnetic field that increases from 0 T to 0.110T in 12.0ms. What is the emf of the coil
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