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A 72 W light bulb with a resistance of 175 is connected to a power supply with a 119 V. What is the internal resistance of the power supply? Express the answer with one decimal place.
A proton travels with a speed of 4.90106m/s at an angle of65°with the direction of a magnetic field of magnitude0.240T in the positivex-direction. What is the magnitude of the magnetic force on the proton?
A baseball outfielder throws a 0.150 kg baseball at a speed of 39.0 m/s and an initial angleof 27.0°. What is the kinetic energy of the baseball at the highest point of its trajectory?
In an ionic solution, 3 x 1015 positive singly ionized charges reach the negative electrode in a time of 1.2 second. Determine what the net current
A 3.0 m tall, 64 cm diameter concrete column supports a 205,000 kg load. By how much is the column compressed
a uniform disk with radius r = 10.0 cm and mass 650 g attached to a uniform rod with length L = 640 mm and mass 300 g. Calculate the rotational inertia of the pendulum about the pivot point
A 51.0 kg woman balances on one heel of a pair of high-heeled shoes. If the heel is circular and has a radius of 0.400 cm, what pressure does she exert on the floor
The average density of the planet Mercury is 5510 kg/m3. The acceleration of gravity on its surface is 3.73 m/s2. Calculate the average radius of Mercury
An electric field is constant at every point on a square surface that is 0.80 m on a side. Calculate the electric flux E passing through the surface
Calculate the distance from the Earth for a geosynchronous satellite orbit. Express the result in units of the radius of the Earth.
Find out the average speed for the trip
A 900N crate slides 12m down a ramp that makes an angle of 40 ? with the horizontal. how much thermal energy is created
A 2,500-kg car moving east at 10.0 m/s collides with a 3,000-kg car moving north. Find the speed of the 3,000-kg car before the collision
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