What goes up but never comes down i know the answer but do you?

Work out sian speed for the first 30 minutes of her journey. give your answer in km/h.

If forces acting on an object are unbalanced. true or false

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) ! : )