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Two snowy peaks are 996 m and 896 m above the valley between them. A ski run extends down from the top of the higher peak and then back up to the top of the lower one, with a total length of 3.3 km and an average slope of 30.0°. A skier starts from rest on the higher peak.
a) At what speed will she arrive at the top of the lower peak if she just coasts without using the poles? Ignore friction.
b) Approximately what coefficient of kinetic friction between the snow and skis would make the skier stop just at the top of the lower peak?
A block of unknown mass is attached to a spring of spring constant 6.5 N/m and undergoes simple harmonic motion with an amplitude of 10 cm. Calculate the maximum acceleration of the block
Determine the maximum percent uncertainty it will produce in this experiment if we did not align the apparatus to minimize its effects
An electron moving to the right at 1.0% the speed of light enters a uniform electric field parallel to its direction of motion. what direction is required for the electric field
A ball is thrown vertically upward with a speed of 15.0 m/s. (a) How high does it rise? m (b) How long does it take to reach its highest point? s (c) How long does the ball take to hit the ground after it reaches its highest point? s (d) What is i..
The nucleus of a 125Xe atom (an isotope of the element xenon with mass 125 u) is 6.0 fm in diameter. It has 54 protons and charge q =+54e. What is the electric force on a proton
question1friend of yours travels by you in his fast sports car at a speed of 0.550 c. it is measured in your frame to
Two positive point charges are a fixed distance apart. The sum of their charges is QT. What charge should each have in order to (a) maximize an electric force between them, and (b) minimize it.
An electric clothes dry operates on a voltage of 220V and draws a current of 20A. How long does the dryer take to dry a full load of clothes that weighs 6.0 kg wet and 3.7kg dry
q1. assume that you are walking perpendicularly with a velocity of 0.90 ms toward a stationary plane mirror. what is
Although the cross-sectional area of a capillary is much smaller than that of the aorta, there are many capillaries, so their total cross-sectional area is much larger. calculate the total cross-sectional area of the capillaries
The earth orbits the sun in an approximately circular orbit of radius 1.496 X 10^11 m (about 93 million miles) in a period of 365 1/4 days. Use these data to determine the mass of the sun
Two large metal plates of area 1.0m2 face each other. They are 5.0cm apart and carry equal and opposite charge on their inner surfaces. what is the charge on the plates
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