Physics, 08.03.2021 23:20 nickname0097

In order to increase the amount of exercise in her daily routine, Tara decides to walk up the seven flights of stairs to her car instead of taking the elevator. Each of the steps she takes are 18.0 cm high, and there are 12 steps per flight. (a)
If Tara has a mass of 61.5 kg, what is the change in the gravitational potential energy of the Tara-Earth system (in J) when she reaches her car?

(b)
If the human body burns 1.5 Calories (6.28 ✕ 103 J) for each ten steps climbed, how much energy (in J) has Tara burned during her climb?

(c)
How does the energy she burned compare to the change in the gravitational potential energy of the system?

Answers: 2

Show answers

Other questions on the subject: Physics

Physics, 22.06.2019 02:50, adrian08022

Ammonia enters the expansion valve of a refrigeration system at a pressure of 10 bar and a temperature of 18oc and exits at 6.0 bar. the refrigerant undergoes a throttling process. determine the temperature, in oc, and the quality of the refrigerant at the exit of the expansion valve.

Answers: 3

continue

Physics, 22.06.2019 12:00, ameliaxbowen7

Suppose a comet has an orbital period of 309.1 years around the sun. what is it’s average distance from the sun?

Answers: 1

continue

Physics, 22.06.2019 14:30, samone26

Which of the following changes will increase the capacitance of a parallel-plate capacitor? (there could be more than one correct choice.) a) increase the charge on the plates b) decrease the poten5al between the plates c) increase the potential between the plates d) introduce a dielectric material between the plates e) decrease the separation between the plates

Answers: 3

continue

Physics, 22.06.2019 15:10, Bgreene2377

Suppose that f : rn → rm and that a ∈ k, where k is a connected subset of rn . suppose further that for each x ∈ k there exists a δx > 0 such that f(x) = f(y) for all y ∈ bδx (x). prove that f is constant on k; that is, f(x) = f(a) for all x ∈ k

Answers: 1

continue

You know the right answer?

In order to increase the amount of exercise in her daily routine, Tara decides to walk up the seven...