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An 8.00 gram bullet is fired into a 2.20 kilogram block initially at rest at the edge of a frictionless table of height 1.00 meter. The bullet remains in the block, and after impact the block lands 2.00 meter from the bottom of the table. Estimate what is the initial speed of the bullet. m/s
A superconductor in a magnetic field obeys the relationship B(T) = B(0) [1 – (T/Tc)2]. If the superconductor has a Tc of 20K and it is operated at T = 4.2K the critical field is 30T. Determine the maximum operating temperature if the material is used..
An astronaut's normal weight it 600 newtons. How much would she weigh while orbiting in a satellite at 12,000 kilometers [two earth radii] above the surface of Earth.
two capacitors of capacitance 3c and 5c where c 0.06 f are connected in series with a resistor of resistance r
An AC voltage with an amplitude of 129 V is applied to a series combination of a 163 ?F capacitor, a 121 mH inductor, and a 21.9 ? resistor. Calculate the power factor at this frequency
An electron is moved from point A to point B in a uniform electric field and gains 5.4010^-15 J of electrostatic potential energy. Calculate the magnitude of the electrostatic potential difference between the two points.
A dump truck designed to carry grain is shown. The dump bed is actuated by a hydraulic cylinder AB. If the combined weight of the dump bed plus its load is 800 lb, and the bed is at the position shown, determine the forces acting on the bed at B and ..
A person can jump a horizontal distance of 2.52 m on Earth, where the free-fall acceleration, g = 9.81 m/s2. How far could the person jump on the moon
A 65-kg woman cheats on her diet and eats a 612-Calorie (612 kcal) jelly doughnut for breakfast. If the human body is only 21% efficient in converting chemical energy to mechanical energy, how many stairs must the woman climb to work off her breakf..
consider a merry-go-round in the shape of a uniform disc of mass 400 kg and radius 3 m. two children each of mass 20 kg
A motorist driving a 1200-kg car on level ground accelerates from 20.0 m/s to 30.0 m/s in a time of 5.7 s. determine the average mechanical power in watts the engine must supply during this time interval
the a-string on a cello vibrates in its first normal mode with a frequency of 220 hz. the vibrating segment is 65.0 cm
water undergoes viscous flow through two pipes with the same pressure difference between the ends. pipe 1 has three
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