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Ben Johnson set a world record of 9.83 seconds in the 100-meter dash on August 31, 1987. He had also set the record for the 60-meter dash of 6.40 seconds that same year. Assuming that in each race Johnson accelerated uniformly up to a certain speed v0 and then held that same maximum speed to the end of both races, find (a) the time t0 to reach v0; (b) the value of v0; and (c) the distance traveled while accelerating.
a car slides freely in vertical plane along a curve. it starts at a point b which is at a height h above the point a.
given an aerodynamic body you have learned in aerodynamics and flight mechanics how to apply the numerical source panel
a 0.75m3 tank contains nitrogen at 150kpa and 40degc. 2.0 kg of oxygen are added to the tank. what is the final
if the velocity of a 1 id pipe is determined to be 0.2 fts by a transit time flow meter what if the volume flow rate?
initially an insulated rigid tank contains 2.01 kg of water at 277.7oc and 1 mpa. a heater in the wall of the tank
two uninsulated rigid tanks contain air. initially tank a hold 1 lbm of air at 1440 degrees r and tank b has 2 lbm of
a child drops a rock into a well and hears it splash into the water at the bottom exactly 2 seconds later. if she is at
if a bar of sae 1040 is to be turned with a high speed steel tool with a feed of 0.015 per revolution and a depth of
If a rod of 1025 steel 0.5 m (19.7 in) long is heated from 20 to 80 deg C (68 to 176 deg F) while its ends are maintained rigid, determine the type and magnitude of stress that develops. Assume that at 20 deg C the rod is stress free.
in a paint plant semiautomatic mixers are normally used. it takes 8 minutes for an operator to load a mixer with the
a water balloon launcher uses two bungee cords each of effective spring constant 125 nm stretched a distance of 0.8 m
an air pressure is to be measured relative to atmosphere using an inclined manometer with a resolution of 1 mm and a
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