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On June 14, 2005, Asafa Powell of Jamaica set a world's record for the 100-m dash with a time t = 9.77 s. Assuming he reached his maximum speed in 3 s, and then maintained that speed until the finish, estimate his acceleration during the first 3 s. Could someone explain how to set up and solve this problem?
What diameter must a copper wire have if its resistance is to be the same as that of an equal length of aluminum wire
the resistor in an rc circuit has a resistance of 140 ohms. using the capacitance c 26 uf calculate the current in
A 86 kg student sits on a chair which is solely supported by a solid 0.64 meter-long steel rod 0.84 cm in diameter. To the nearest micron (millionth of a meter), what is the change in length of the rod produced by the student's weight?
A bicycle is moving to the right at a speed of Vo= 20 mph on a horizontal and straight road. The radius of thebicycle's wheels is R = 1.15 ft. Let P be a point on the peripheryof the front wheel.
Electrons in a photoelectric-effect experiment emerge from a copper surface with a maximum kinetic energy of 1.10 eV
An elevator has a mass of1170 kg and carries a maximum load of 786 kg. A constant frictionalforce of 4260 N retards its motion upward. Theacceleration of gravity is 9.8 m/s2 .
in proton-beam therapy a high-energy beam of protons is fired at a tumor. the protons come to rest in the tumor
A cannon tilted up at a 25 degree angle fires a cannon ball at 81.0m/s from atop a 18.0m -high fortress wall
part 1 what do you think of socrates conclusion that no person knowingly does evil and therefore all evil is ignorance?
A motor is connected to a solid cylinder with a diameter of 1.2m and a mass of 51kg. Write down Newton's 2nd Law for this object
The D string of a violin is a little too tightly stretched. Seven beats per second are heard when the string is sounded together with a tuning fork that is oscillating accurately at 293.66 Hz
A monatomic gas is adiabatically compressed to 0.500 of its initial volume. How do each of the following quantities change The molar specific heat at constant volume
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