Consider three drinking glasses. All three have the same base area, and all three are filled to the same depth with water. Glass A is cylindrical. Glass B is wider at the top than at the bottom, so it holds more water than glass A. Glass C is narrower at the top than the bottom, so it holds less water than glass A. Which glass has the greatest liquid pressure at the bottom?A) Glass A
B) Glass B
C) Glass C
D) All three have equal non-zero pressure at the bottom.
E) All three have zero pressure at the bottom.

find the surface area of the sphere to the nearest square unit. use a calculator.

a. 254 in.2

b. 64 in.2

c. 127 in.2

d. 1,018 in.2

answer: the potential energy decreases from 379 j to 243 j

explanation:

for the law of conservation of energy, the total energy in a system must be conserved. the total energy of the system is given by the sum of kinetic (k) and potential (u) energy:

e = k + u

the total energy is e=675 j, and this does not change.

initially, the kinetic energy is k=296 j, so the potential energy is

at the end, the kinetic energy is k=432 j, so the potential energy is

so, we see that the potential energy has decreased from 379 j to 243 j.