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A chairlift has a length of 2 km, a vertical rise of 100 m, and it is operating at a constant speed of 8 km/h. The chairs are located 20 m apart, and each chair can seat four people (250 kg total mass). Determine the power required to operate this chairlift in kW and Horsepower? You may neglect friction and air drag.
In seawater, a life preserver with a volume of 4.00×10?2 m^3 will support a 70.0 kg person, find the density of the material composing the life preserver
Make a table summarizing the rules for circuits with resistors: How to combine resistors in parallel, how do voltages behave in series and in parallel
A hotel elevator ascends 190 m with a least speed of 4.0 m/s. Its acceleration and deceleration both have a magnitude of 1.4 m/s2.
Ball 1, with a mass of 140g and traveling at 11.0m/s , collides head on with ball 2, which has a mass of 310g, What are the final velocities of each ball if the collision is perfectly inelastic
Suppose we know that an electron in an excited state has a tangential velocity (v = 3.65 x 10^5 m/s), What is the radius of this orbit
A standard 1 kilogram weight is a cylinder 46.5 mm in height and 42.5 mm in diameter. What is the density of the material
Three charges, q1=2.0x10^-8 C, q2= -3.0x10^-8 C, and q3= -4.0x10^-8 C, are located on the y-axis, Find the resultant force exerted on the third charge q3 by the other two charges
A nitrogen molecule is initially in a large volume of calm air at STP. How many collisions does the nitrogen molecule suffer in 10 minutes
Both surfaces of a double convex lens have radii of 30.8 cm. what is the index of refraction of the lens material
When cars are equipped with flexible bumpers, they will bounce off each other during low-speed collisions, thus causing less damage. Calculate the change in the combined kinetic energy of the two-car system during this collision
A 5.00-g bullet, traveling horizontally with a velocity of magnitude 490 m/s, is fired into a wooden block with mass 0.800 kg, initially at rest on a level surface. What is the decrease in kinetic energy of the bullet
A 6000kg truck stands on the deck of an 80000kf ferryboat. Initially the ferry is at rest and the truck is located at its front end. how far will the ferry move forward relative to the water
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