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A skier is pulled up a slope at a fix velocity by a tow bar. The slope is inclined at 25.0 degree with respect to the horizontal. The force applied to the skier by the tow bar is parallel to the slope. The skier mass is 55.0 kilogram, and the coefficient of kinetic friction between the snow and the skis is 0.120. Obtain the magnitude of force that the tow bar exerts on the skier.
Two microscopes are placed one on top of the other. They are in contact at one end but a hair separates them at the other end. determine the thickness of the hair?
the speed of sound in an alcohol at a temperature of 20 c is 1260 ms. the density of the alcohol at that temperature is
A particle lives for a short time before breaking apart into other particles. According to this hypothetical person, how far does the laboratory move before the particle breaks apart
Professional baseball pitchers can deliver a pitch which can reach the blazing speed of 100 mph (miles per hour). how much kinetic energy does the ball have
You fly your not-so-trusty Scooty Puff Pro spaceship away from the Earth along a line that con- nects the center of the Earth to the center of the Moon. How far away are you from the center of the Moon
An elevator is moving downward but has a constand upwardacceleration of a=3.5m/s2, how long dose it take the coin to strike the elevator floo
The average intensity of sunlight reaching the earth is 1390 W/m2. A charge of 2.38 x10−8 C is placed in the path of this electromagnetic wave. What is the magnitude of the maximum electric force that the charge experiences?
A rectangular loop of wire that is 45 cm wide and 13 cm long is placed in a region where the magnetic field is B = 0.2 T, obtain the magnitude of the magnetic flux
A mass attached to a spring stretches it 2.5 cm from equilibrium. What is the angular frequency of the oscillation
A 1.9kg block slides along a frictionless surface at 1.7m/s . A second block, sliding at a faster 4.9m/s , What was the mass of the second block
The work function for sodium is 2.46 eV. What is the stopping potential, What is the cut-off wavelength for the emission of electrons from a sodium surface
Gasoline is made up of hydrocarbons. Suppose 80% of mass of gasoline is carbon and all of this becomes CO2 in combustion. If the density of gasoline is 6.7 lb/gal, how much CO2 is emitted per gallon of gasoline burned? The atomic mass of carbon is 12..
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