A cart with a mass of 7.0 kilograms is attached to a spring. When released from the spring, the cart travels up a hill with a height of 12 meters. The cart comes to rest at the top of the hill. The spring is 100% efficient. 4. Approximately how much elastic potential energy was required to bring the cart to rest at the top of the
hill?
A. 42.0 joules
B. 68.7 joules
C. 504 joules
D. 824 joules

Hen a gfci receptacle device is installed on a 20-ampere branch circuit (12 awg copper), what is the minimum volume allowance (in cubic inches) required for conductor fill for each conductor in the outlet box?

Ms. hidalgo opens the door to her classroom. her classroom is 60 degrees and the air outside is 80. predict what will happen using your knowledge of how heat flows.

Awater slide of length l has a vertical drop of h. abby's mass is m. an average friction force of magnitude f opposes her motion. she starts down the slide at initial speed vi. use work-energy ideas to develop an expression for her speed at the bottom of the slide. then evaluate your result using unit analysis and limiting case analysis. express your answer in terms of the variables h, m, l, vi, f and appropriate constants. vf v f