Two cars are 300 km apart. at noon, one car heads north at a rate of 50 km/hr. two hours later, the second car heads south at a rate of 60 km/hr. how fast is the distance between the cars changing at 5 pm?

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.

What is the earliest point in the universe that we can observe? why can’t we see back further than this?

You will be galileo perform the experiment to determine if objects with different mass fall at the same, or different, rates in the air and in a vacuum. (refer to the walk-through video to locate the online lab within the online textbook).