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A simple pendulum of length L is displaced from the vertical by 8.00 degrees and released from rest. At what angle, again measured from the vertical, is the pendulum's kinetic energy equal to 40.0 percent of its maximum kinetic energy? Assume the acceleration due to gravity and the length of the pendulum are constant.
an 78-kg jogger is heading due east at a speed of 2.8 ms. a 56-kg jogger is heading 42 deg north of east at a speed of
A particular eye has a focal length of 2.0 cm instead of the 2.2 cm that would put a sharply focused image on the retina. Is this eye nearsighted or farsighted? What type of corrective lens is needed for the eye in the previous question?
A mass-spring system is in simple harmonic motion. It has a spatial frequency F and amplitude A. what fraction of the system energy is kinetic
Monochromatic light with wavelength 570nm passes through a circular aperture with diameter 7.00?m. What is the diameter of the Airy disk on the screen
A block of mass m is attached to a cord that is wrapped around the rim of a flywheel of radius R and hangs vertically, what is the rotational inertia of the fly wheel
In an R-L-C series circuit the magnitude of the phase angle is 52.9? with the source voltage lagging the current. The reactance of the capacitor is 360? , Find the reactance of the inductor
A puck is sliding without friction on the ice at a speed of 2.48 m/s. Find the speed and direction of the second puck after the collision
An electric motor rotating a workshop grinding wheel at a rate of 93 rev/min is switched off. Assume the wheel has the constant negative angular acceleration of magnitude 2rad/s2.
A racing car of mass 1000kg moves around a banked track at a constant speed of 30ms. Assuming the total reaction at the wheels is normal to the track and the horizontal radius is 100m. Calculate the angle of inclination of the track to the horizon..
The tungsten filament in an incandescent light bulb has a resistance of 1.5 ohm when the bulb is not turned on at 20°C. What is the operating temperature of the filament
a coal-fired electric power plant has a 2000-megawatt electric power output and operates with an overall plant
You measure the period of your heartbeat on a particular EKG graph to be 1.2841 ± 0.0619 s. Find what is your heart rate in beats per minute
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