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A skier of mass 64 kg starts from rest at the top of an 18° slope points her skis straight down the slope and lets gravity pull her down the slope. The slope is 65 m long. Her speed at the bottom is 15 m/s.
a) Assuming zero air resistance, what is the magnitude of the frictional force among her skis and the snow?
b) What is the coefficient of kinetic friction among her skies and the snow?
A block is moved down an incline a distance of 5.0m from point A to point B by a force F that is parallel to the incline and has a a magnitude of 2.0 N
Suppose that you have a 390 ?, a 780 ?, and a 2.20 k? resistor. What is the maximum resistance you can obtain by combining these
three identical point particles that have charge q are at the vertices of an equilateral triangle that is circumscribed
A capacitor with its plates separated by paper stores 4.6 nc of charge when it is connected to a particular battery. How much charge does the capacitor store
Three blocks of mass 2.0 kg, 8.0kg, and 15.0 kg are connected by light strings passing over frictionless pulleys. find its acceleration and the tensions in the strings
The moon is 3.85Ã-10^8 m from Earth, and it takes 27.3 days to orbit Earth. At what speed is the moon traveling relative to Earth
a female orb spider has a mass of 0.45 g. she is suspended from a tree branch by a 1.2 m length of 0.0020mm diameter
A superconductor in a magnetic field obeys the relationship B(T) = B(0) [1 – (T/Tc)2]. If the superconductor has a Tc of 20K and it is operated at T = 4.2K the critical field is 30T. Determine the maximum operating temperature if the material is used..
An electron with kinetic energy 1.40 keV circles in a plane perpendicular to a uniform magnetic field. Determine the period of the motion
Radio waves are diffracted by large objects such as buildings, whereas light is not noticeably diffracted by large objects such as buildings. Why is this?
An electric dipole consists of charges +e and -e separated by 0.76 nm. It is in an electric field of strength 2.50 10^4 N/C, What is the torque on the dipole when it is perpendicular to the field
A guitar string has a length of .8 m. If the wave speed ofthe spring id 560m/s, what is the frequency of the sixth harmonic
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