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A ski trail makes a vertical descent of 78.0 m (as shown in the figure below ). A novice skier, unable to control his speed, skis down this trail and is lucky enough not to hit any trees. If the skier is moving at 10.3 m/s at the bottom of the trail, calculate the total work done by friction and air resistance during the run. The skier's mass is 73.6 kg.
A charged particle with a charge-to-mass ratio of |q|/m = 5.7 108 C/kg travels on a circular path that is perpendicular to a magnetic field whose magnitude is 0.75 T
1 a conductor of rad r length e and resistivity p has resistance r. what is the new resistance if it is stretched to 4
Here's the question: If you have two metal plates 0.50cm apart, and you drop a bit of liquid (mass of 2.6 x 10^-12 g), How many electrons appear on the drop
A 0.366-kg block is attached to a horizontal spring that is at its equilibrium length, and whose force constant is 20.3 N/m. How far does the putty-block system compress the spring
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
A 110 g copper calorimeter cup contains 190 cm3 of water and 45 g of ice, all in thermal equilibrium. find the mass of water before the hot iron is put into the cup
A 17.0-lb block rests on the floor. What force does the floor exert on the block, what is the force exerted by the floor on the 17.0-lb block
A circuit consists of two 475-k%u03A9 resistors in series with an ideal 12.0-V battery. Calculate the potential drop across one of the resistors
You are designing a delivery ramp for crates containing exercise equipment. Calculate the maximum force constant of the spring that can be used in order to meet the design criteria
A bowl in the shape of half of a sphere is floating on the surface of water. The mass of the bowl is 0.8 kg. What is the outer radius of the bowl Rbowl
A playground merry-go-round, made in the shape of a solid disk, hasa diameter of 2.50 m and a mass of 350.0 kg. Two children, each ofmass 30.0 kg, sit on opposite sides at the edge of the platform.Approximate the children as point masses.
A copper rod of cross-sectional area 14.5 cm2 has one end immersed in boiling water and the other in an ice-water mixture, How many grams of ice melt each second
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