Estimate how much power light bulb will consume
You buy a 60w light bulb in europe where the electricity is 240 v. if you use the light bulb at home in the united states how bright will it be relative to the 60w 120v lightbulbs? estimate how much power it will consume.
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A speedboat moving at 38.0 m/s approaches a no-wake buoy marker 100 m ahead. The pilot slows the boat with a constant acceleration of -3.00 m/s2 by reducing the throttle.
A nonconducting solid sphere of radius 2.80 cm carries a uniformly distributed positive charge of 8.70×10-9 C. Calculate the magnitude of the electric field at a point 1.60 cm away from the center of the sphere.
The mass of the motor is four times the mass of the module. What is the speed (in km/h) of the command module relative to Earth just after the separation?
A wooden raft has a mass of 67 kg. When empty it floats in water (density 1000 kg/m3) with 51% of its volume submerged. What mass of sand can be put on the raft without it sinking?
Many people mistakenly believe that the astronauts orbiting the earth are "above gravity." Calculate the acceleration due to gravity, g, for space shuttle territory, 245 kilometers above the earth's surface (dashed line in sketch). Earth's mass is
Two people with a combined mass of 120 kg hop into an old car with worn-out shock absorbers. This causes the springs to compress by 8.30 cm. When the car hits a bump in the road, it oscillates up and down with a period of 1.70 s. Find the total lo
How much work is done by a force = (3x N) +(5 N), with x in meters, that moves a particle from a position i = (3 m) +(4 m), to a position f = -(5 m) -(3 m).
When the paper is held 29 below the lens, the sunlight is focused on the paper and the paper ignites. What is the focal length of the lens?
A 0.12-kg ball is placed in a shallow wedge with an opening angle of 120°, as shown in the figure. For each contact point between the wedge and the ball, determine the force exerted on the ball. Assume the system is frictionless. Find contact
A block weighing 10.58 N rests on a 29° inclined plane. (a) Find the normal force exerted by the plane on the block.
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