An airplane flies 21 km in 30 minutes. what is its average speed in kilometers per hour?

Heena wants to measure the volume of a ball that is 24 cm across. how should she set up her equation?

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.)

The free body diagram shows a box being pulled to the left up a 25-degree incline. the magnitude of the normal force is