Avase with mass m falls from height h to the floor. which of the following is true? a. it is not an isolated system because the vase moves. b. the law of conservation of energy applies. c. there is no pe, so no conservation of energy. d. the ke can change, so there is no conservation of energy.

Orque can be calculated by multiplying the force (n) applied at 90? to the lever arm at a distance (m) from the pivot point (point of rotation), the compound si unit for the torque is n? m. if the force (at 90? to the lever arm) applied is 15 n and it is applied at 2.0 m from the pivot point (point of rotation), what is the torque on the lever?

The of a machine determines its "usefulness." a. input force b. output force c. mechanical advantage

Athermometer is removed from a room where the temperature is 70° f and is taken outside, where the air temperature is 10° f. after one-half minute the thermometer reads 60° f. what is the reading of the thermometer at t = 1 min? (round your answer to two decimal places.) ° f how long will it take for the thermometer to reach 30° f? (round your answer to two decimal places.)