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In the old west, a marshal riding on a train traveling 50 m/s seesa duel between two men standing on the Earth 50 m apart parallel tothe train. The marshal's instruments indicate that in hisreference frame the two men fired simultaneously.
(a) Which of of the two men, the first one the train passes (A) orthe second one (B) should be arrested for firing the first shot? That is, in the gunfighter's frame of reference, who firedfirst?
(b) How much earlier did he fire?
(c) Who was struck first?
If a wave vibrates back and forth six times each second, and its wavelength is 7 meters, what is its frequency, period, and speed
A child is playing with a ball on a string. The ball has mass 0.065 kg, the string has radius 1.2 m and assume that the string is massless. What is the maximum tension in the string
Two bars of identical mass are at 29 °C. One is made from glass and the other from another substance. The specific heat capacity of glass is 840 J/ (kg • C°).
A box contains about 5.0 ? 1021 hydrogen atoms at room temperature (21°C). Determine the thermal energy of these atoms
At the same time, the stationary trumpeter played the same note. Ballot heard 3.0 beats per second. How fast was the train moving toward him.
A parallel-plate capacitor has a capacitance of 10 mF and charged with a 20 V power supply. The power supply is then removed and a dielectric of dielectric constant 4 is used to fill the space between the plates. The energy now stored by the capac..
A charge q1 on the y-axis produces afield of magnitude 16 N/C at the origin,and a charge q2 on the x-axis producesa field of magnitude 28 N/C at the origin. What is the magnitude of the total field at the origin?
Two automobiles of equal mass approach an intersection. One vehicle is traveling with velocity 12.3 m/s toward the east, find the initial speed of the northward-moving vehicle
An energy storage system based on a flywheel (a rotating disk) can store a maximum of 4.4 when the flywheel is rotating at 1.4×104 revolutions per minute. What is the moment of inertia of the flywheel
A small metallic bob is suspended from the ceiling by a thread of negligible mass. The ball is after that set in motion in a horizontal circle so that thread describes a cone. Compute the magnitude of the angular momentum of the bob about a vertic..
A proton and an alpha particle (charge = 2e, mass = 6.64 10-27 kg) are initially at rest, separated by 2.30 10-15 m. What are both of their speeds at infinity
A physics student standing on level ground finds that an imaginary line drawn from his eye to the top of a tree, If his eyes are 5.8 feet above ground, what is the height of the tree
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