Realgrades

What is the best description of sound waves? A. A source vibrates up and down, causing air molecules to move up and down perpendicular to the direction the wave is transmitted. B. A source vibrates back and forth, causing air molecules to move back and forth in the same direction that the wave is transmitted. C. A source vibrates up and down and back and forth, causing air molecules to move in a circular motion as the wave is transmitted. D. A source ejects a ring of high-velocity air mo...

Atomic number - correct answer the number of protons in the nucleus of an atom. Atomic radius - correct answer The atomic radius of a chemical element is a measure of the size of its atoms Aufbau principal - correct answer electrons orbiting one or more atoms fill the lowest available energy levels before filling higher levels Chemical family - cor...

boil - correct answer the change from a liquid to a gas At sea level, water boils at - correct answer 100°Celsius (212° Fahrenheit) Water boils as lower temperatures in - correct answer higher elevations condense - correct answer The change from a gas to a liquid density - correct answer ...

You begin pouring sodium chloride into a glass of water. For a long time, the sodium chloride just dissolves in the water, but suddenly it begins to pile up at the bottom of the glass. Which statement is true? A. The sodium chloride has increased the temperature of the water. B. The sodium chloride has decreased the temperature of the water. C. The water is unsaturated. D. The water is saturated. - correct answer D. The water is saturated. ...

What type of weathering is illustrated by the cracks in the simulated granite outcrop below? - correct answer C. Pressure release. Explanation: Granite forms from the cooling of molten magma deep below Earth's surface. As granite is uplifted, layers of rock above are eroded away, which reduces the pressure on the granite. The release of pressure causes the outer layers of rock to expand and form cracks called "exfoliation joints" parallel to t...

The limiting reactant in a chemical reaction is the reactant that A. is used up at the end of the reaction. B. is left over after the reaction. C. has the largest number of atoms. D. has the fewest number of atoms. - correct answer Correct Answer: A. is used up at the end of the reaction. How many water molecules (H2O) can be produced from 6 molecules of hydrogen gas (white) reacting with 6 molecules of oxygen gas (red)? Which reactant is...

What is metabolism? - correct answer term used for all of the chemical reactions that happen in the body All chemical reactions = - correct answer metabolism What is a catabolic reaction? - correct answer Breaks down larger molecules into smaller molecules All chemical reactions involve? - correct answer ...

The graph represents the heating of water in a pot. At 150 seconds, the water has just reached a boil. If the heat is left on, what will happen to the temperature and volume of water in the pot? (All temperatures in °C.) - correct answer The temperature will remain constant, and the water volume will decrease. Which of the following statements is most accurate? - correct answer All of the above. ...

a fridge - correct answer a cooker - correct answer a sofa - correct answer a toilet - correct answer a bath - correct answer a sink - correct answer a washbasin - correct answer ...

If the volume occupied by the gas molecules shown below were doubled, what would happen to the pressure they exert? (Assume constant temperature) - correct answer A. It would be cut in half If the temperature of the gas molecules shown below were reduced to 200 K, what pressure would they exert? (Assume constant volume) - correct answer B. 0.50 atm Which of the following actions would cause the vo...