Sam is walking through the park. He hears a police car siren moving on the street coming toward him. What happens to the siren sound as it approaches and then passes Sam?

The primary energy source for most communities is sunlight. Producers use sunlight to make carbohydrates. Consumers eat producers and use the carbohydrates for energy. What happens to the energy in a consumer's body when it dies?

In convection currents, the heat rises and colder material sinks

What are the differences between glaciers and geysers

Which of the following is a unit of energy found in food? a). vitamin b) calorie c) nutrient d) water

Its false sorry love try again

At a certain location, the horizontal component of the earth's magnetic field is 2.5 * 10-5 T, due north. A proton moves eastward with just the right speed for the magnetic force on it to balance its weight. Find the speed of the proton.

An acrobatic airplane performs a loop at an airshow. The centripetal acceleration the plane experiences is 14.7 m/s2. If it takes the pilot 45.

Which of the following was NOT an outcome of Bacon's rebellion? A. A more direct focus on the "Indian Problem" B. A more focused plain to isolate black slaves from white servants C.

A science class did an investigation to see how many breaths it took for each student to blow up a balloon. Jason blew up his balloon with the fewest breaths. Which of these might explain why Jason took fewer breaths to blow up his balloon? A.

How the behavior of waves is affected by a medium