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at the top of a giant swing on the high bar,a 50kg gymnast's velocity is 1 m/s,and he is 3.5 m high. What is the gymnast's total mechanical energy at this instant?
A projectile is fired at an angle of 55 degrees above the horizontal with an inital speed of 35.0 m/s. What is the magnitude of the horizontal component of the bullet's
A wall in a house contains a single window. The window consists of a single pane of glass whose area is 0.18 m2 and whose thickness is 2.3 mm. what is the percentage lost by the window
a 2.00 kg frictionless block is attached to an ideal spring with force constant 315 N/m. initially the spring is neither stretched nor compressed, find the maximum force the spring exerts on the block
It again strikes the floor. Find (c) the time interval from when the ball was launched to when the ball strikes the floor and (d) the horizontal distance from the point where the ball was launched to the point where the ball strikes the floor.
Suppose the work function for a particular metal is 5.09 eV. Find the cut-off frequency for this metal
A transverse periodic wave is represented by the equation y(x, t) = 2.50 cm cos(2,500 rad/s t - 15.0 m-1 x). What is the frequency of the vibration of the wave
If the coefficient of static friction is 0.500, what minimum force magnitude is required from the rope to start the crate moving
Newton's universal constant of gravitation is G = 6.67 × 10-11 meters cubed (m3) per kilogram per second per second. The Sun's mass is M = 1.9891 x 10^30 kilograms. Earth's orbital period is P = 365.256366 days. Obtain the average radius of Earth's o..
a small disk of radius r=2.00 cm has been glued to the edge of a larger disk of radius R=9.00 cm so that the disks lie in the same plane. What is the rotational inertia of the two-disk assembly about the rotation axis through O
A person stands on a bathroom scale in a motionless elevator. When the elevator begins to move, the scale briefly reads only 0.82 of the person's regular weight, Find the direction of the acceleration
An astronomical telescope is designed with an overall magnification of 80x. The objective has a focal length of 98.0 cm. How far should the eyepiece be from the objective
A neon sign requires a 13 kV rms voltage. This is to be obtained from a 220 V rms power supply using a single transformer. Find the required turns ratio for the transformer
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