According to the law of conservation of energy, which changes would increase the total energy of a system? A. An addition of 300 J of GPE and a loss of 450 J of thermal energy

B. An addition of 200 J of thermal energy and a loss of 550 J of thermal energy

C. An addition of 400 J of thermal energy and a loss of 550 J of kinetic energy

D. An addition of 500 J of kinetic energy and a loss of 450 J of thermal energy

The energy released by a chemical reaction can be measured using a calorimeter. when barium hydroxide octahydrate crystals are reacted with dry ammonium chloride inside of a coffee cup calorimeter, the temperature of the 18.00 g of water in the calorimeter decreases from 30.0°c to 8.0°c. the equation for calculating energy absorbed or released by a reaction is: where q is the energy released or absorbed, m is the mass of water in the calorimeter, cp is the specific heat of water, and δt is the observed temperature change. if the specific heat of liquid water is 4.19 j/g·°c, how much energy was absorbed by the reaction?

20. threshold braking in the vehicle's braking system occurs when a. the brake pedal is pushed, heel on floorboard, with full foot pressure. b. the brakes are exerting full braking power, without traction loss. c. the driver begins pushing down the brake pedal, with moderate slowdown. d. the brakes just begin to take hold with a gradual slowdown.

What was the first instrument to ever record an earthquake?