Bullfrogs attract mates with loud calls in the evenings. Cranes attract mates by "dancing"—flapping their wings, jumping, bobbing, and even tossing sticks. © Lyn Topinka, used with permission What is the same about the way bullfrogs and cranes attract mates?
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A. They both attract mates with their bright colors.
B. They both attract mates with their calls.
C. They both attract mates with certain behaviors.
D. They both attract mates with the way they look.

Naoki's bicycle has a mass of 10 kg. if naoki sits on her bicycle and starts pedaling with a force of 168 n, causing an acceleration of 2.8 m/s2, what is naoki's mass?

What is a metal replacement reaction

Problem page combustion of hydrocarbons such as pentane ( c5 h12 ) produces carbon dioxide, a "greenhouse gas." greenhouse gases in the earth's atmosphere can trap the sun's heat, raising the average temperature of the earth. for this reason there has been a great deal of international discussion about whether to regulate the production of carbon dioxide.(a) write a balanced chemical equation, including physical state symbols, for the combustion of liquid pentane into gaseous carbon dioxide and gaseous water. (b) suppose 0.350 kg of pentane are burned in air at a pressure of exactly 1 atm and a temperature of 20.0 degree c. calculate the volume of carbon dioxide gas that is produced. be sure your answer has the correct number of significant digits.