When you exercise, an area of the brain called the pituitary gland releases chemicals into your bloodstream called

What is the total resistance of 3 resistors of 3ohms added together in series?

Rank the colors of the spectrum from largest wavelength to smallest wavelength:

What is most likely true of an atom with a mass of 15 amu? A) There are 15 protons. B) There are 15 electrons. C) The total number of protons and electrons is 15. D) The total number of protons and neutrons is 15.

Compare the energy consumption of two commonly used items in the household. Calculate the energy used by a 1.40 kW toaster oven, Wtoaster, which is used for 5.40 minutes, and then calculate the amount of energy that an 11.

Which of the following is not a postulate of the kinetic molecular theory? A. The absolute temperature of a substance is equal to the average kinetic energy of its particles. B. The collisions between gas molecules are elastic. C.

Which of the following statements is true? A. Minerals can be solids or liquids B. Minerals can be elements or compounds C. Graphite and gold are examples of gemstones D. Triclinic crystals have more right angles than isometric crystals

Stu wanted to calculate the resistance of a light bulb connected to a 4.0-V battery, with a resulting current of 0.5 A. He used the formula R = VI and obtained an answer of 2. Was Stu's answer correct? How do you know?

Which of the following statements are TRUE when the spaces on a ticker-tape diagram do not change? a. The object is not accelerating. c. Both A and B. b. The object has a constant speed. d. None of the above

the useful power out of an electric motor is 20w and the total power into the motor is 80w calculate the percentage efficiency of the motor

What happens as dolphins grow up?