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A ladder is leaning against a vertical wall. The coefficient of friction between the ladder and the horizontal surface is μ1 = 0.295 and the coefficient of friction between the ladder and the wall is μ2 = 0.203. Find the maximum angle with the vertical ladder can make without falling on the ground.
A converging lens has a focal length of f = 43 cm for blue light and f = 53 cm for red light. An object is placed 140 cm in front of the lens and is illuminated with white light. How far apart are the two images
Assume you are stopped in your car at a traffic light, and an ambulance approaches you from behind with a speed of 12 m/s. The siren on an ambulance produces sound with a frequency of 600 Hz. What frequency will you hear?
A pair of power transmission lines each have a 0.800 ? resistance and carry 694 A over 9.14 km. If the rms input voltage is 38.1 kV. Calculate the power loss in the lines
You are driving down a road at a constant speed of 17.8 m/s and another car drives toward you. obtain what frequency do the people in the other car hear
A 0.450kg rock is dropped 14.0m into 3.0kg of water. If all the rock's kinetic energy is converted to thermal energy in the water, what's the water's temperature increase
Sweating is one of the main mechanisms with which the body dissipates heat. Sweat evaporates with a latent heat of 2430 kJ/kg at body temperature, what would be the maximum sustainable metabolic rate, in watts, if75% of the energy used by the body ..
A 0.550 {\rm kg} glider on an air track is attached to the end of an ideal spring with force constant 458 {\rm N}/{\rm m}; Compute the total mechanical energy of the glider at any point in its motion
Adjacent antinodes of a standing wave on a string are 15.0cm apart. A particle at an antinode oscillates in simple harmonic motion with amplitude 0.850cm and period 0.0750 s. The string lies along the +x-axis and is fixed at x=0. What is the amplitud..
A small but measurable current of 1.1 10-10A exists in a copper wire whose diameter is 3.1 mm. Assume the current is uniform. Calculate the current density
An equilateral triangle 10.0 meters on a side has 16.0 kg spheres whose center as are at each corner of the triangle. The spherical masses each have a radius of 0.5m. If the balls are released from rest, what speed will they have when they collide at..
To stretch a certain spring by 3.00 from its equilibrium position requires 9.50 of work. What was the maximum force required to stretch it
A space ship is approaching a space station of 1.2 x 10^5 m/s. compute the frequency of the beacon observed on the spaceship
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