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A machine gun fires 25 g bullets with a muzzle velocity of 800 m/s.The firing rate is 200 rounds per minute. Determine the average recoil force.
What is the smallest thickness of a soap film that would appear black if illuminated with 470 nm light? Assume there is air on both sides of the soap film.
An electron is shot into one end of a solenoid. As itenters the uniform magnetic field with in the solenoid, its speedis 840 m/s and its velocityvector makes an angle of 30° with the central axis of the solenoid.
A sinusoidal electromagnetic wave having a magnetic field of amplitude 1.25\mu {\rm T} and a wavelength of 432{\rm nm} is traveling in the + x direction through empty space. What is the amplitude of the associated electric field
OVer a region where the vertical component of the Earth's magnetic field is 40uT downward, a 5 meter length of conducting wire is held along an east-west direction and moved north at 10m/s. what is the voltage of the east end wire minus the volta..
A power plant operates at 28.5% efficiency during the summer when the seawater used for cooling is at 20.0°C. what would be the plant's efficiency in the winter
An electric heater plugged into a 115-V AC outlet uses an average electric power of 1200 W. What are the maximum instantaneous power
A 109-kg horizontal platform is a uniform disk of radius 1.61 m and can rotate about the vertical axis through its center. A 69.9-kg person stands on the platform at a distance of 1.07 m from the center and a 29.9-kg dog sits on the platform near the..
A block of mass 3.65kg and density 600 kg/m^3 floats in a bath of oil of density 970kg/m^3. calculate total volume of wood and metal
A coil of wire with a resistance of 0.45 ohm has a self-inductance of 0.083 H. If a 3.0-V battery is connect across the ends of the coil, what is the stored energy in the inductor
An ideal spring with spring constant k - 105 N/m is compressed by 14cm by the block until it is released. a) After the block is released and just as it looses contact with the spring, what is the velocity of the block?
400 L of water is at 4 oC. If it took a heat 600 seconds to heat this up to 6 oC, what is the power rating of the heater
The excess internal energy of metabolism is exhausted through a variety of channels, such as through radiation and evaporation of perspiration. Calculate the rate at which you lose energy by exhaling humid air
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