Select the correct answer. Which of the following is true for balancing equations? A. There must be an equal number of atoms of each element on both sides of the equation. B. The number of products should be equal to the number of reactants. C. The properties of the products should be the same as the properties of the reactants. D. There must be an equal number of compounds on both sides of the equation.

Much of the information taught in earth-space science would not be available if it weren’t for our remote sensing abilities. explain two ways our remote sensing strategies contribute to our knowledge of these topics.

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) ! : )

What energy transformations occur each time the skateboarder rolls up the ramp?