What is Earth’s energy budget? Select one:

a. The total cost of the energy produced by all power plants on Earth.

b. The total energy produced by all power plants on Earth.

c. The sum of Earth’s incoming solar energy minus Earth’s outgoing energy.

d. The sum of Earth’s internal energy plus Earth’s incoming solar energy.

Astudent pours 10.0 g of salt into a container of water and observes the amount of time it takes for the salt to dissolve. she then repeats the process using the same amounts of salt and water but this time she slowly stirs the mixture while it is dissolving. the student performs the experiment one more time but this time she stirs the mixture rapidly. the dependent variable in this experiment is: time for salt to dissolve speed of stirring amount of water mass of salt