A beaker of boiling water stops boiling and eventually reaches room temperature. There is no lid on the beaker. The beaker and its content must have: A. lost thermal energy and mass to the surroundings.
B. gained mass from the surroundings, but lost thermal energy to the surroundings.
C. gained thermal energy and mass from the surroundings.
D. gained thermal energy from the surroundings, but lost mass to the surroundings.

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.

Although longitudinal waves can travel through all media types what is the disadvantage of this type of wave transmission? a) he efficiency of he wave transmission is greatly diminished as the media becomes less dense b) the oscillation of one set of particles has a huge impact on neighboring particles c) particles become too close together as they bump into each other making it more likely to hit other particles down the line

You've already seen the value of 9.8 in this lesson. what's this value called? what quantity does it represent?