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A rock is thrown horizontally from a bridge with a speed of 30.9 m/s. If the rock is 24.4 meters above the river at the moment of release, find how long the rock is in the air.
A galvanometer has a coil resistance of 100 ohms and gives a full scale deflection when the potential difference across it is 0.0005 V. What size resistor (with a value measured in ohms) is required
Synchrotron radiation takes energy from an accelerator beam and is related to acceleration. Why would you expect the problem to be more severe for electron accelerators than proton accelerators?
A car of mass m is on a frictionless roller coaster track. How hard does the track push on the car at the top of the loop
Coulomb's Law gives us an expression for the electric field caused by a point charge with magnitude . Suppose we have several point charges. The electric field at a location is the vector sum of point charge contributions.
Two conducting wires of the same material are to have the same resistance. One wire is 17 m long and 0.39 mm in diameter. If the other wire is 0.31 mm in diameter, how long should it be?
q1. a loudspeaker is placed between two observers who are 120 m apart along line connecting them. if one observer
A block of mass m = 3.07 kg is attached to a spring (k = 29.3 N/m) by a rope that hangs over a pulley of mass M = 6.14 kg and radius R = 8.81 cm. find the maximum extension of the spring
We supply 132.4 Joules of heat to an engine with 15.60% efficiency. How much work can the engine do
What is the lower radiated from a nichrome wire 1.0 m long and 1.5 mm in diameter at a temperature of 900? C? The emissivity of nichrome at this temperature is 0,092.
A thin double convex glass lens with an index of 1.56 while surrounded by air has a 10 cm focal length. what is the focal length of the lens in water
A 120 V potential is applied to a space heater that dissipates500 W during its operation. What is the resistance of the heater
A world war I cannon mounted on a railcar and set therefore that it will project a shell at an angle of 30o above the horizontal. If the mass of the real car plus cannon is 5000 kilogram, find what will be the recoil velocity of the car along the ..
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