HELP PLEASE I NEED HELP!! The half life of Sodium-24 is 15 hours. If we have 10 grams of Sodium-24, how much will remain after 15 hours​

Animals respond in various ways to stimuli detected through their senses. some of these responses are stimulated by the presence of danger. which of these animal responses is the best example of a response to an immediate threat? a) a rooster crows every morning at the first sign of light. b) as something approaches an octopus, it shoots a cloud of ink. c) from late fall until spring, bears hibernate to preserve energy. reactivate d) a dog is getting hot in the sunlight, so he moves to a shaded area.

The coefficient of friction is a number that represents the resistance to sliding between two in contact with one another.

The least penetrating form of radiation is