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A rock thrown with speed 10.5 m/s and launch angle 30.0°(above the horizontal) travels a horizontal distance of d= 17.5 m before hitting the ground. From what height was the rock thrown? Use the value g= 9.800 m/s2 for the free-fall acceleration.
Find the height yi from which the rock was launched.
A container is filled with water to a depth of 48.3 cm. on top ofthe water floats a 24.4 cm thick layer of oil with a density of 862kg/m3. what is the absolute pressure at the surface of the water? the acceleration of gravity is 9.81 m/s2.
An electron traveling north enters a region where the electric field is uniform and points west. The electron:
A light bulb emits light uniformly in all directions. The average emitted power is 150.0 W. At a distance of 5 m from the bulb, decide (a) the peak value of the electric field (b) the rms value of the electric field and (c) the average intensity of t..
A small piece of Styrofoam packing material is dropped from a height of 1.50 m above the ground. Until it reaches terminal speed, magnitude of its acceleration is given by a = g - bv. After falling 0.40 m, the styrofoam effectively reaches its ter..
A solid spherical ball of mass 2.3 kg and radius 0.11 m rolls along a smooth, What is the ball's rotational kinetic energy
Waterslides are nearly frictionless, hence can provide bored students with high-speed thrills. If Kevin is clocked at 25 m/s at the bottom of the slide, find the work done on him by friction
Two identical conducting spheres, fixed in place, attract each other with an electrostatic force of 0.138 N when their center-to-center separation is 67.1 cm. What was the negative charge on one of them
The light ray makes an angle of α = 32.1° with the normal line at the boundary of linseed oil and water. find the angles θ1 and θ2. Note that n = 1.48 for linseed oil.
A small 4.50 brick is released from rest 3.00 above a horizontal seesaw on a fulcrum at its center, Find the angular momentum of this brick about a horizontal axis through the fulcrum
Two point charges 1.6cm apart have an electric potential energy -160?J . The total charge is 25nC. What are the two charges
A dentist's drill accelerates from rest at 640rad/s2for 2.30s and then runs at constant angular velocity for 6.50s. Through how many total revolutions has the drill turned
a loaded flatbottom barge floats in fresh water. the bottom of the barge is 3.76 m below the water line. when the barge
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