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You slide a box of books at constant speed up a 34 degree ramp, applying a force of 190 Newton directed up the slope. The coefficient of sliding friction is 0.18.
(a) Find how much work has you done when the box has risen1 meter vertically?
J
(b) Calculate what is the mass of the box?
kg
A positron is an antimatter particle identical in mass to an electron but with a positive charge, Calculate the energies of the three lowest states of positronium
Calculate the period of a satellite orbiting the Moon, 94km above the Moon's surface. Ignore effects of the Earth
a circus clown weighing 170 lbs. is fired from a cannon at 50 degrees above the horizontal. The clown lands in a circular net that has a radius of 15 ft. What was the initial velocity of the clown
A dead battery of 10v has an internal resistance of 1 ohms and is connected in parallel with jumper cables to another car with a 12v battery with internal resistance of 0.01 ohms
Imagine a stationary sourceof sound waves. By stationary, we mean that it is not moving with respect to the medium. How fast would you have to move toward the source in order to perceive twice the “actual”frequency? The speed of sound in air is 34..
What is the total magnitude of the magnetic flux by the coil before it is rotated.
An electron is accelerated by a constant electric field of magnitude 325 N/C. (a) Find the acceleration of the electron. m/s2 (b) Use the equations of motion with constant acceleration to find the electron's speed after 9.00 10-9 s, assuming it st..
Consider a balloon containing hydrogenmolecules at room temperature (20°C) and atmospheric pressure. what is the number of molecules in the balloon
A vertical scale on a spring balance reads from 0 to 225. The scale has the length of 11.5 from the 0 to 225 reading. A fish hanging from the bottom of the spring oscillates perpendicularly at a frequency of 3. Ignore the mass of the spring, what ..
A particular eye has a focal length of 2.0 cm instead of the 2.2 cm that would put a sharply focused image on the retina. Is this eye nearsighted or farsighted? What type of corrective lens is needed for the eye in the previous question?
An apartment has the dimensions 8m by 5m by 3m. Thetemperature is 25 degrees C, and the relative humidity is60%. How much water vapor does each cubic meter of aircontain
A charge of +q is located at the origin, while an identical charge is located on the x axis at x = 0.54 m. Where should the third charge be located
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