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the astronaut whose heart rate on earth is 60 beats/min increases his velocity to v=.8c. Now what is his heart rate as measured by an earth observer?
Assume that an inexpensive watch runs 0.004% slower than a "perfect watch" (viz., a "time standard") that neither loses nor gains time, what would the perfect watch measure for this time interval
In the figure below, a constant horizontal force app of magnitude 11 N is applied to a uniform solid cylinder by fishing line wrapped around the cylinder. what is the frictional force acting on the cylinder
question1a blue car pulls away from a red stop-light just after it has turned green with a constant acceleration of 0.6
A horizontal pipe contains water at a pressure of 111 kPa flowing with a speed of 1.8.00 m/s. The pipe narrows to one-half its original diameter. What are speed and pressure of the water while the pipe narrows?
Two charged plates create a potential difference of 190 V. At a point halfway between the plates an electron is released from rest. What was the initial speed and direction of the proton
The rear axle of a truck is 2.5 m long. If the truck is moving at 28 m/s, what emf is induced between the ends of the axle
A dipole of moment 0.5 e·nm is placed in a uniform electric field with a magnitude of 9 104 N/C. What is the magnitude of the torque on the dipole
A fireman 52 m away from a burning building directs a stream of water from a ground-level fire hose at an angle of 32° above the horizontal.
Determine the location of the center of mass of the molecule as measured from the hydrogen atom (Chlorine is 35 times more massive than hydrogen.).
When light of wavelength 350 nm falls on a potassium surface, electrons having a maximum kinetic energy of 1.31 eV are emitted. find the frequency corresponding to the cutoff wavelength
Your roommate is working on his bicycle and has the bike upside down. He spins the 52.0 -diameter wheel, What is the pebbles acceleration
For some applications, it is important that the value of a resistance not change with temperature. For example, suppose you made a 4.60 kresistor from a carbon resistor and a Nichrome wire-wound resistor connected together so the total resistance is ..
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