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A bunch of grapes is located in a spring scale of a supermarket. The grapes oscillate down and up with a period of 0.48 second, and the spring in the scale have a force constant of 650N/m. Calculate the mass and weight of the grapes?
An alpha particle (charge +2e, mass 6.64x10^-27) moves head onat a fixed gold nucleus (charge +79e). what was the initial speed of the alpha particle
A 80.0 Hz generator with an rms voltage of 150 V is connected in series to a 3.20 k ohm resistor and a 3.50 micro farad capacitor. Find the phase angle between the current and the voltage
an electron is observed traveling at a speed of 38.9middot106 ms parallel to an electric field of magnitude 12800 nc.
Water runs out of the horizontal drainpipe at the rate of 120 liters per minute. It falls 3.20 m to the ground. Assume the water doesn't splash up, what average force does it exert on the ground? (1 liter = 1 kg.)
A block of mass m is attached to a string that is wrapped around the circumference of a wheel of radius R and moment of inertia I. Find the moment of inertia of the wheel if its radius is 8.0 cm
for a science experiment you need to electroplate zinc onto both sides of a very thin 1.00 rm cm times 1.00 rm cm
A child on a swing-set swings back and forth. If the length of the supporting cables for the swing is 2.8 m, what is the period of oscillation
question a solid sphere of weight 36.0 n rolls up an incline at an angle of 30.0deg. at the bottom of the incline the
A 0.2 kg ball is suspended from the ceiling with a massless string (L=2.3m). What was the initial angular displacement of the pendulum
You're using a rope to pull a sled at constant velocity across level snow,with coefficient of kinetic friction 0.050 between sled and the snow. With what force should you pull with the rope horizontal
Tarzan swings on a 31.0 m long vineinitially inclined at an angle of 37.0° with the vertical. What is his speed at the bottom of the swing if hestarts from rest
A person running a fever has a body temperature of 39.4 degrees C What is the person's temperature on the Fahrenheit scale
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