1 The diagram shows an unbalanced rod. Two loads X and Y can be moved 2 points along the rod. The rod turns in a clockwise direction as shown. Which
action could make the rod balance? *
rod
х
у
movement
of rod
movement
of rod
pivot
moving X to the left
moving X to the right
moving Y to the right
moving the pivot to the left

Write the equation for momentum, first using symbols for the variables, then using words for the variables.

The consumption of fossil fuels could be

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) ! : )