On a road trip, a driver achieved an average speed of (48.0+a) km/h for the first 86.0 km and an average speed of (43.0-b) km/h for the remaining 54.0 km. what was her average speed (in km/h) for the entire trip? round your final answer to three significant figures. a = 15 b = 1

The earth exerts a gravitational force of 500 n on amy. what is amy’s mass in kg?

Agroup of monkeys is trying to cross the river in a rowboat. the maximum buoyant force on the rowboat is 2,000 n. the weight of the rowboat is 1,000 n. each monkey has a weight of 150 n. how many monkeys can safely cross in the rowboat at one time? explain your reasoning, including any calculations you used to find the answer.

Aperson touches a large chunk of ice with their hand and remarks, “this is making me cold.” explain what this person is feeling. is the ice transferring “cold” to the person? is there a heat transfer occurring? explain.