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A small object of mass 3.80 g and charge -18 μC "floats" ina uniform electric field. What is the magnitude and direction of the electric field?
A force F produces an acceleration a on an object of mass m=2 kg. a force 4F IS exerted on a second object and an acceleration of 8a results. ( this means that if four times the original force is exerted , a new object accelerates by an amount equal ..
A particular garden hose has an inside diameter of 3/4 in. The nozzle opening has a diameter of 1/4 in. what is the flow speed through the nozzle
An ac generator producing 20 V (rms) at 200 rad/s is connected in series with a 50-%uF057 resistor, The rms voltage (in volts) across the capacitor is
A Ferris wheel is moving at an initial angular velocity of 1.0 rev/37 s. If the operator then brings it to a stop in 3.2 min, what is the angular acceleration of the Ferris wheel
A 4.00 kg block is free from rest 2.0m high at the top of a 30 degree frictionless incline. The block makes a head-on elastic collision with another 3.00 kg block initially at rest on a horizontal surface at the bottom of the incline.
An electric field E with an average magnitude of about 150 N/C points downward in the atmosphere near Earth's surface. What charge (both sign and magnitude) must be used
A person holds a ladder horizontally at its center. Treating the ladder as a uniform rod of length 2.75 m and mass 8.00 kg, find the torque the person must exert on the ladder
Which of the following photons has the greatest energy?
A body oscillates with simple harmonic motion according to x = (4.0 m) cos[(2.0pi rad/s)t + pi/3 rad]. At t = 4.50s , What is the phase of the motion
a softball is hit over a third basemans head with speed v0 and at an angle theta from the horizontal. immediately after
an antelope is at a distance of 20.0 m from a converging lens of focal length30.0cm. the lens forms an image of the
The leg and cast weigh 290 -N, with the center of mass as indicated by the blue arrow in the diagram. The counterbalance w2 weighs 120 N. Determine the weight w1 and angle α needed in order that there is no force exerted on the hip joint by the le..
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