A football is thrown with an acceleration of 15 m/s^2 and a force of 13 N. What is its mass? A.150 kg
B. 0.87 kg
C. 2.0 x 105 kg
D. 0.12 kg

An object with initial temperature 130 ∘ f is submerged in large tank of water whose temperature is 50 ∘ f . find a formula for f ( t ) , the temperature of the object after t minutes, if the cooling constant is k = − 0.2 . remember newton's law of cooling (the rate of change of temperature with respect to time is equal to k times the difference between the temperature of the object and the surrounding temperature) ! : )