Worker stands still on a roof sloped at particular angle
A worker stands still on a roof sloped at an angle of 39° above the horizontal. He is prevented from slipping by a static frictional force of 500 N. Find the mass of the worker.
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Calculate the nonconservative work, Wnc, done by water resistance on the rock, the gravitational potential energy of the system, U, the kinetic energy of the rock, K, and the total mechanical energy of the system, E, for the following depths below
A sphere 10 times larger in diameter than an actual golf ball is used in the wind tunnel study. What speed should be selected for the model to simulate a prototype speed of 50 m/s?
The true weight of "10-pound" sacks of potatoes processed at a certain packaging house follows a normal distribution with mean of 10.1 pounds and standard deviation of 0.2 pounds.
Please explain both Poisson and exponential distributions and the difference between them. Please include extensive details for lifesaver.
If the rider, with inertia 68 kg starts at a height hi = 4 m and ends up after the first time across the pipe at a height that is 80% of the initial height, what is the force of friction across the bottom of the pipe?
Ammonia (NH3) reacts with oxygen to give NO and water. How many O2 molecules are required to react with 68 grams of ammonia?
When do we use Chevbychev's theorem? with what kinds of problems? and for what purpose? please explain clearly for lifesaver.
Two air track carts move toward one another on an air track. Cart 1 has a mass of 0.47 kg and a speed of 0.9 m/s. Cart 2 has a mass of 0.65 kg. (a) What speed must cart 2 have if the total momentum of the system is to be zero?
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Address Piaget's Four Stages of Cognitive Development. Include the following for each stage: Title of each stage
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