What is latent heat? a. energy released or absorbed to change the kinetic energy of a substance b. energy released or absorbed to change the pressure of a substance c. energy released or absorbed to change the temperature of a substance d. energy released or absorbed to change the phase of a substance

the heat required to convert a solid into a liquid or vapor, or a liquid into a vapor, without change of temperature. hope this helps

The correct choice is

D. energy released or absorbed to change the phase of a substance.

By definition, latent heat is the amount of heat required by an object to change from one state to another. for example : heat required for 1 g of ice at 0 °C converts to water at 0 °C is 334 J.  heat required for 1 g of water at 100 °C to vaporize is 2230 J.

what was the acceleration of the 2 kg cart?

⇒ 16.0 cm/s2

what was the acceleration of the 4 kg cart?

⇒ 8.1 cm/s2

what was the acceleration of the 6 kg cart?

⇒ 5.3 cm/s2