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A small rigid cylindrical vessel contains 1 kg of humid air at 80oC under a total pressure of 1 bar. The humid air inside the vessel contains 0.150 kg of water vapor. Determine the relative humidity of the air in the container.
A crate is dragged 4.0m along a rough floor with a constant velocity by a worker applying a force of 450N to a rope at an angle of 30? to the horizontal
As part of a carnival game, a 0.503-kg ball is thrown at a stack of 19.3-cm tall, 0.423-kg objects and hits with a perfectly horizontal velocity of 10.6 m/s, what is the moment of inertia of the object
A solid sphere of uniform density starts from rest and rolls without slipping a distance of d = 4 m down a q = 28° incline. The sphere has a mass M = 5.2 kg and a radius R = 0.28 m. What is the magnitude of the frictional force on the sphere?
A spring with k=620 N/M is stretched with a tension of 40 N. What is the potential energy of the stretched spring
A hook is boxing primarily involves horizontal flexion of the shoulder, while maintaining a constant angle at the below. What is the average speed of the fist during the hook
An object attached to a horizontal spring is oscillating back and forth along a frictionless surface. The maximum speed of the object is 1.75 m/s, and its maximum acceleration is 7.79 m/s2. How much time elapses betwen an instant when the object's sp..
A group of students need to cross a river in the shortest time. In what direction should the students head the boat
A cannon fires a cannonball from the top of a wall at a speed of 23.07 m/s and an angle of 19.56 degrees from the horizontal. What is the horizontal distance from the wall where the fired cannonball hits the ground
A 35.0-kg child swings in a swing supported by two chains, each 2.92 m long. The tension in each chain at the lowest point is 430 N. Find the child's speed at the lowest point
The situation just described occurs when the plane is above a point on the ground that is two-thirds of the way from the antenna to your house. determine the wavelength of the radio waves?
A toy cannon uses a spring to project a 5.34 g soft rubber ball. The spring is originally compressed by 5.09 cm and has a force constant of 7.98 N/m. With what speed does the projectile leave the barrel of the cannon
A high-performance sports car can go from 0 to 100 mph in 7.8 s. (Assume the car travels in the positive direction. What is the car's average acceleration
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