Physics, 05.02.2021 19:00 mariahcid904
Mr. Draper asks his class to design a system of gears, strings, and pulleys that will allow him to pull back the classroom's curtains simply by turning a crank at his desk. The system must be built within the following constraints: It must be made only out of metal gears, metal pulleys, string, and one crank. It must be strong enough to move the curtains. It cannot be in the way of students or their desks. It must take no more than one day to build. The final design will use which type of energy to perform work on the curtains? A. elastic potential energy B. thermal energy C. gravitational potential energy D. kinetic energy
Answers: 1
Physics, 22.06.2019 18:50, jtsizemore
An insulated thermos contains 148 g of water at 72.7 ˚c. you put in a 11.7 g ice cube at 0.00 ˚c to form a system of ice + original water. the specific heat of liquid water is 4190 j/kg•k; and the heat of fusion of water is 333 kj/kg. what is the net entropy change of the system from then until the system reaches the final (equilibrium) temperature?
Answers: 2
Physics, 23.06.2019 00:00, shauntleaning
What energy transformations occur each time the skateboarder rolls up the ramp?
Answers: 2
Mr. Draper asks his class to design a system of gears, strings, and pulleys that will allow him to p...
History, 18.12.2019 15:31
History, 18.12.2019 15:31
Biology, 18.12.2019 15:31
History, 18.12.2019 15:31
Mathematics, 18.12.2019 15:31
Mathematics, 18.12.2019 15:31