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A 59.3-kg crate rests on a level floor at a shipping dock. The coefficients of static and kinetic friction are 0.714 and 0.446, respectively. What horizontal pushing force is required to
(a) just start the crate moving and
(b) slide the crate across the dock at a constant speed?
A spherical concave lens has a focal length of 20cm, and an object is placed 15cm from the lens. estimate of the image distance and give image characteristics
If the particle is released from rest at the midpoint C, s=100mm, and the acceleration is measured as a= (4s) m/s2 , where s is in meters, evaluate the velocity of the particle when it reaches plate B, s=200mm, and the time it needs to travel C to ..
A car is traveling with a constant speed 80 miles per hour a road that makes half a circle. What is the velocity of the car
A snow skier, starting from rest, goes downhill for 5.00s and reaches a level spot of smooth snow. What is the skier's average acceleration down the hill
Two adjacent sources each emit a frequency of 800Hz in air where the velocity of sound is 340 m/s. How much farther back would source 1 have to be moved as a result an observer in front of the sources would hear no sound.
A child on a boat throws a 5.40 kg package out horizontally with a speed of 12.0 m/s. determine the velocity of the boat immediately after, assuming it was initially at rest. The mass of the child is 26.5 kg and the mass of boat is 55.5 kg.
What is the fundamental resonant frequency of the air column if the velocity of sound in the air is 340 m/s.
Design a circuit to control the temperature of a water bath at a set-point temperature of 85°C. Choose a resistive sensor and draw up a circuit that will provide control around the set-point.
The minimum distance required to stop a car moving at 42.0 mi/h is 39.0 ft. What is the minimum stopping distance for the same car moving at 67.0 mi/h, assuming the similar rate of acceleration.
a dog walking quickly away from a motion detector. Draw a velocity graph that could represent this motion
Calculate the intensity distribution
An electric utility company supplies a customer's house from the main power lines (115V) with two copper wires, Calculate the power lost in the copper wires
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