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An elevator has mass 740 kg, notincluding passengers. The elevator is designed to ascend, atconstant speed, a vertical distance of 20.0 m (five floors)in 15.0 s and it is driven by amotor that can provide up to 40 hp to the elevator. What is the maximum number of passengers that can ride in the elevator? Assume that an averagepassenger has a mass of 62.0 kg.
A physics professor is pushed up a ramp inclined upward at an angle 35.0^\circ above the horizontal as he sits in his desk chair that slides on frictionless rollers. The combined mass of the professor and chair is 84.0kg . He is pushed a distance ..
q1. a 18.0 kg loudspeaker is suspended 2.40m below the ceiling by two 4.10m long cables that angle outward at equal
Two point charges -2Q and +3Q are on the x-axis, -2Q at the origin and +3Q at x = D. Find two points on the x-axis within the vicinity of the charges where the electric potential is zero
At a pressure of 1 atm, the heat of vaporization of water is 22,260,000 J/kg; use the first law of thermodynamiics to calculate the heat of vaporization of water at 25 celcius
A 0.250-kg ball is dropped from a height 10.0 cm onto a spring. If the spring constant is 60.0N/m what is the distance will the spring be compressed, how high will the ball go
Resolve the position s_b of the image if an object is placed in air on the axis of the rod 16.00 cm to the left of the end of the rod.
A cylindrical storage tank has a radius of 1.22 m. When filled to a height of 3.71 m, it holda 14 300 kg of a liquid industrial solvent.
A certain camera has f-numbers that range from 1.7 to 29. If the focal length of the lens is 57 mm, what is the range of aperture diameters for the camera
A hollow, conducting sphere with an outer radius of 0.240m and an inner radius of 0.210m has a uniform surface charge density of +6.84*10-6C/m2, Calculate the strength of the electric field just outside the sphere
A bowling ball made for a child has two thirds the radius of an adult bowling ball. They are made of the same material (and therefore have the same mass per unit volume). By what factor is the mass of the child's ball reduced
The driver of a car sets the cruise control and ties the steering wheel so that the car travels at a uniform speed of 15m/s in a circle with a diameter of 130m. What arc length does it travel in this time
A uniform 2.95- kg spinning disk with a radius of 0.243 m is brought to rest by a brake-pad pressed against the side 0.165 m from the rotation axis. What frictional force was applied by the brake pad
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