When doing a chin-up, a physics student lifts her 42.0 kg body a distance of 0.25 m in 2 seconds. What is the power delivered by the student's biceps? (you must SHOW ALL WORK for your math calculations) .

answer: option c. i.e. electric current flowing “downhill” from the negative electrode to the positive electrode in a battery

explanation:

the water analogy to the circuits define the pipes (water flows) to the electric current. now, we know that the electric current flows from the positive terminal to the circuit (as shown in the diagram attached).

hence, option c is the correct answer.

when a device is used in a circuit in which the voltage is 81 v, the current flowing through the device is 3 a. what is the resistance of the device?

a. 27 ω

b. 40.5 a

c. 243 ω

d. 243 a

the correct answer is a. 27

causes

fossil fuels burn

cities become more industrialized

human population grows worldwide