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While running, a man dissipates about 0.60 Joule of mechanical energy per step per kilogram of body mass. If a 60-kg man develops a power of 70 W during a race, determine how fast is the man running? Suppose a running step is 1.5 meter long.
a 45kg box is pulled across a horizontal floor. a rope attached to the box makes an angle of 30 degrees with the
Two narrow slits separated by 1.0mm are illuminated by 559nm light. Find the distance between adjacent bright fringes
A puck (mass m1 = 1.30 kg) slides on a frictionless table as shown in the figure below. The puck is tied to a string that runs through a hole in the table and is attached to a mass m2 = 3.9 kg. What is the change in the kinetic energy of the puck
A certain substance has a dielectric constant of 2.8 and a dielectric strength of 18.0 MV/m. If it is used as the dielectric material in a parallel-plate capacitor, what minimum area should the plates of the capacitor have to obtain a capacitance of ..
the mass of a star is 1.71middot1031 kg and it performs one rotation in 34.1 days. find its new period in days if the
An AC generator supplies an rms voltage of 230 V at 50.0 Hz. It is connected in series with a 0.650 H inductor, a 6.00 ?F capacitor, What is the peak voltage across the inductor
A parallel-plate capacitor with plates of area 441 cm2 is charged to a potential difference V and is then disconnected from the voltage source. When the plates are moved 5.02 mm farther apart, the voltage between the plates increases by 81.0 Volts. W..
light from a helium-neon laser wavelength633 nm is focused through a pinhole prior to illuminating a 1.00 mm diameter
the plank cde has a weight of 30 lb and rests on a small pivot at d. the ll5-lb gymnast a is standing on the plank at c
a coil of radius 75 mm has 250 turns and carries a current of 2.2 a. find the magnetic field at the centre of the coil
a basketball player tries to make a half-court jump shot releasing the ball at the height of the basket. assuming that
When kicked, the ball leaves the ground with a speed of 29.0 m/s at an angle of 51° to the horizontal. Explain by how much does the ball clear or fall short of the crossbar?
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