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A 50 kg box is resting on an inclined surface of 32 degrees. The coefficient of friction between the box and the surface is 0.45. Draw a force diagram and express the equations for all the x and y forces.
A low-power laser used in a physics lab might have a power of0.50 mW and a beam diameter of 3.0mm. calculate the average light intensity of the laser beam
The second orbit for the only electron in a He+ ion has a radius of 5.29 X 10^-11 m. What is the speed of an electron in that orbit
A pulley in the form of a uniform disk has a rope hanging over it.The circumference of the pullet is 1.2m and the pulley's mass is2.2 kg. The rope is 8m long and has a mass of 4.8 kg. When the difference in heights between the two end of the rope ..
Ordinary glasses are worn in front of the eye and usually 2.00{\rm cm} in front of the eyeball. What focal length lenses are needed to correct his vision
What is the hydronium ion concentration of a solution with a hydroxide ion concentration of 1.0 x 10-7 mole per liter? What is the pH of a solution with a hydronium ion concentration of 1.0 x 10-12 mole per liter?
One end of a rope is tied to a block of mass 4.6 kg and you pull straight up on the other end of the rope to lift the block up off of the ground with an acceleration of 3.8 m/s2. What force does the rope exert on the block
an object undergoing parabolic motion travels 125 m in the horizontal direction before returning to its initial height.
A uniform 2.15- kg spinning disk with a radius of 0.233 m is brought to rest by a brake-pad pressed against the side 0.149 m from the rotation axis. What frictional force was applied by the brake pad
an airplane with a wingspan of 100m flies parallel to the earth's surface at a point where the downward component of the earth's magnetic field is 0.500 x 10^-4 T. what is the reading of the voltmeter
A skier of mass 85.0 kilogram is pulled up a snow-covered slope at a constant speed by a tow rope that is parallel to the ground. Find what is the tension of the tow rope
A circular loop of wire with 10 turns, radius 12.5 cm and resistance 1.5 Ohms is connected to a 12 V power supply. The magnetic field at the center of this loop is _______.
the transmutation reaction 194Po -> 33Al + ___ + 31n, What is the full name of the daughter atom
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