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A boy in a wheelchair (total mass 45.0kg) wins a race with a skateboarder. He has speed 1.40 m/s at thecrest of a slope 2.00 m high and 12.4m long. At the bottom of the slope his speed is 6.40 m/s. If air resistance and rolling resistancecan be modeled as a constant friction force of 41.0 N, find thework he did in pushing forward on his wheels during the downhillride.
A 45.0-g object connected to a spring with a force constant of 30.0 N/m oscillates with an amplitude of 4.00 cm on a frictionless, horizontal surface. calculate the total energy of the system
Two capacitors are connected to a battery. The battery voltage is V = 90 V, and the capacitances are C1 = 2.00 ?F and C2 = 4.00 ?F. Determine the total energy stored by the two capacitors
Given that the carbon atom has a mass of 12 amu, how many carbon atoms are there in a diamond with a mass of 8 g
A 0.350-kilogram cup at 10 °C is filled with 0.100 kg of boiling coffee. what is the specific heat of the cup material
A microscope has an eyepiece of focal length 2.10 cm and an objective of focal length 4.10 cm. How far from the eyepiece is the image formed by the objective
A proton moves with a velocity of v= (2i ? 5j +k ) m/s in a region in which the magnetic field is B= (i + 2j ?k ) T. What is the magnitude of the magnetic force this particle experiences?
A pendulum consisting of a small sphere with mass 1.135 kg suspended by a string of length 72.23 cm is hanging from the ceiling. Its motion is restricted by a peg that is sticking out of the wall 43.03 cm directly below the pivot point. What is the p..
a baseball player hits a triple and ends up on third base. a baseball diamond is a square each side of length 29 m with
You are studying guitar strings and are able to measure a few of (but not all) the standing wave frequencies for a particular string. what is the highest possible value for the fundamental frequency
A space traveler weighs 565 N on earth. What will the traveler weigh on another planet whose radius is 3 times that of earth and whose mass is twice that of earth.
A string on a guitar vibrates at 420 Hz. If the tension on the string is 102 N, what is the mass of the string if the portion that vibrates is 63.7 cm long
calculate the electric potential due to a dipole whose dipole moment is 4.5times10-30 cm at a point 1.4times10-9 m
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