Engine coolant for cars is made of a solution of ethylene glycol. If 27.7 g of ethylene glycol release 688 J of heat to finish at a temperature of 32.5 °C, what was the initial temperature?  The specific heat capacity of ethylene glycol is 2.42 J/g°C. Must show your work (scratch paper) to receive credit. 

During urine formation in the kidneys, which of these processes involves returning of the needed (non-waste) substances present in the filtrate back to the blood?

Which urine formation process involves the movement of substances from the blood of the peritubular capillaries into the filtrate of the renal tubules?

Which organ has these functions? -removes metabolic wastes from the blood and excretes them-regulates the volume, composition, and pH of body fluids-secretes renin

In males, which of these is an organ of both the reproductive and urinary systems?

Renal arteries transport blood from the ___ to the kidneys.

The term firmware refers to programs embedded into hardware devices. This software only changes when a firmware upgrade is performed.

Gains in ____ permit preschoolers to generate increasingly complex play and problem-solving goals.

By age 6

A particular lake has been isolated and unchanged for more than a thousand years.  One day a company buys the property the lake is on and tries to turn the lake into a self-sustaining fish farm.  Unfortunately, there just aren’t enough nutrients in this lake to support a self-sustaining ecosystem capable of producing large fish so the company goes out of business.  How would you describe this lake’s water quality?