5. Eliza starts from rest at the top of a 35 m hill, snowboards down a 30° incline into a valley, and continues up a 25 m hill. Both hill heights are measured from the valley floor. Assume you can neglect friction. a. How fast is Eliza snowboarding at the bottom of the valley?
b. What is Eliza’s speed at the top of the next hill?

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.)

What is the average speed of a car that travels 40 mph for 1 hour and 60 mph in another hour?

Which situation will produce the greatest change of momentum