5. A certain substance has a solubility of 12 grams in 100 grams of water at 20°C. This means that
O when 12 grams of the substance are stirred into a beaker with 100 g of water, it will begin settling at the bottom
O the substance will begin to dissolve when 12 grams are present in solution
O when 12 g of the substance are dissolved in 100 grams of water, the solution will be saturated
when 12 g of the substance are dissolved in 100 grams of water, the solution will be dilute

Aplayground slide is 8.80 ft long and makes an angle of 25.0° with the horizontal. a 63.0-kg child, initially at the top, slides all the way down to the bottom of the slide. (a) choosing the bottom of the slide as the reference configuration, what is the system's potential energy when the child is at the top and at the bottom of the slide? what is the change in potential energy as the child slides from the top to the bottom of the slide? (include the sign of the value in your answer.)