Aloaded ski lift pulls 20 chairs with people sitting in them up 200 meters. each chair with a person has 250 kg of total mass. how much power does it take to lift them if the ride takes 10 minutes?

a. 16,333 w
b. 163,333 w
c. 980,000 w
d. 98,000,000 w

First, we calculate the energy needed to transport one chair:
Energy = mass * gravity * height
Energy = 250 * 9.81 * 200
Energy = 490,500 Joules

Total energy for 20 chairs:
20 * 490,500
= 9,810,000 Joules

Power is expressed in watts which is joules per second, so:
Power = 9,810,000 / (10 * 60)
Power = 16,350 Watts

The answer is A

answer: - b cells

explanation: -

there are many types of white blood cells present in our body. one such class of white blood cells are the lymphocytes. the b cells belong to the lymphocyte class of wbcs. the b cells perform their action against the pathogen by producing specialised proteins called as antibodies. these antibodies are produced as and when the b cells encounter pathogens in response to the antigens present on the surface of the pathogen. these antibodies bind to the antigens present on the pathogen and then, target them for destruction by other cells of the immune system.

so, the b cells mediate their action by identifying the antigens present on the surface of the pathogens and then producing antibodies in return to mediate its effect.