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1. A 3 kg object slides for 5 m down an incline which is at 40 degrees. the coefficient of friction on the incline is 0.15 use work and energy methods to find the speed of the mass at the bottom of the incline.
2. 2000 kg elevator is accelerated uniformly from rest to 4 m/s in a time of 90s. During this time the elevator rise a distance of 15 m a find the change in mechanical energy of the elevator during this time find the average power used to move the elevator
Sunlight strikes the surface of a lake. A diver sees the Sun at an angle of 26.8° with respect to the vertical
Four identical masses of mass 600 mg each are placed at the corners of a square whose side lengths are 15.0cm.What is the magnitude of the net gravitational force on one of the masses, because of the other three.
If the skier is moving at 13 m/s at the bottom of the trail, calculate the total work done by friction and air resistance during the run
A luggage conveyor belt is inclined at at an angle 15.6 degrees and has length 350m. Estimate the power required to operate the luggage conveyor
A spherical weather balloon is filled with hydrogen until its radius is 3.40 m, Find the buoyant force acting on the balloon, assuming the density of air is 1.29 kg/m3.
What is the magnitude of the net force on the student.What is the magnitude of contact force on the student by the backpack.
what is the resolving power of a microscope (lamda = 550 nm) with a 5-mm-diameter objective which has focal point of= 9mm
A typical American house requires an average 20 kW for heating. Explain how many homes could be heated with the waste heat of this one power plant?
A 529-kg satellite is in a circular orbit about Earth at a height above Earth equal to Earth's mean radius, Find the gravitational force acting on it
A bismuth target is struck by electrons, and x-rays are emitted, Estimate the M- to L-shell transitional energy for bismuth when an electron falls from the M shell to the L shell
A variable-speed drill, initially turning at 300 rpm, speeds up to 1300 rpm in a time interval of 0.3 s
A violinist places her finger so that the vibrating section of a 1.3g/m string has a length of 40.00 cm, after that she draws her bow across it. A listener nearby in a 20 ^circ {rm C} room hears a note with a wavelength of 60.0cm. What is the tens..
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