Power can be expressed 1. in joules per watt, or in newtons per second 2. in joules per second, or in watts 3. in joules, or in newton-meters

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) ! : )

If the area of a square has increased by a factor of 16, by how much has each side increased?

What is the moment of inertia i of this assembly about the axis through which it is pivoted? express the moment of inertia in terms of mr