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A 66 kg rock climber is climbing a so called chimney between two rock slabs as shown in the figure. The static coefficient of friction between her shoes and the rock is 1.22; between her back and the rock it is 0.92. She has reduced her push against the rock until her back and her shoes are on the verge of slipping.
What is her push against the rock?
Two tiny conducting spheres with a mass of 15gm each are hanging from non-conducting threads of length 70cm such that they are 4cm apart as shown to the left.
An electromagnetic plane wave at a certain location has an electric field pointed up which is given as a function of time as E = 54 V/m × sin (6x106 Hz × t). How much momentum is absorbed by the foil for the same time interval
An ideal gas initially at 20°C and 219 kPa has a volume of 4.70 L. It undergoes a quasi-static,, Find the heat added to the gas during the expansion.
Calculate the electric field from four point-charge: +q at -d and -q at -d/2; 2q at d and -2q at d/2 on the z-axis, First calculate the electric potential, and then calculate its radient.
A physics book (mass=3.0 kg) is given a horizontal velocity of 4.0 m/s out the window. Determine the work down by gravity while the book is in between the two windows
Calculate the equilibrium concentration of dissolved oxygen in 15celcius dgree water at 1atm and again at 3,000m elevation Using Henry's law, P vs z equation
A telescope can be used to enlarge the diameter of a laser beam and limit diffraction spreading. what is the size of the spot this beam would make on the moon
Find the modulation index corresponding to the given trapezoidal pattern for the AM signal.
A partly-full paint can has 0.79 U.S. gallons of paint left in it. What is the volume of the paint and how thick is the layer of wet paint
The bullet first passes through the left disk and then through the right disk. It is found that the angular displacement between the two bullet holes is θ = 0.320 rad. From these data, evaluate the speed of the bullet.
What is the minimum work needed to push a 800 -kg car 860m up along a 9.0 degree incline
Assume that each enriched fuel pellet is 10mm in length, 9mm in diameter, is 95% theoretical density (theoretical density of UO2 is 10.97g/cc), and that 5% of the uranium content is fissioned
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