The pitch of an ambulance siren changes as it approaches you. The pitch also changes as the siren moves away from you. Which is the scientific term for this occurrence?

When conducting scientific research, appropriate methods must be used to find information that is reliable and valid. Angela was assigned a research project about human body systems for her anatomy course.

The drawing shows a person looking at a building on top of which an antenna is mounted. The horizontal distance between the person's eyes and the building is 95.2 m.

The Earth is a closed system to matter. What does that mean?

A motorist travels 406 km in a 7.0hour period. What was theaverage speed in: km/h and m/s

Measurement is the use of numbers according to a standard. a. True b. False

Thermal energy from the Earth's core heats rock and creates magma. This hot magma then rises toward the Earth's surface, cools, and sinks back down toward the Earth's core. Which actions below occur during this process? (multiple answers) A.

A surface is bombarded by particles, each of mass small 'm', which have velocity normal to the surface. On average, n particles strike unit area of the surface each second and rebound elastically. What is the pressure on the surface? A. nmv B.

If an atom has twelve electrons, how many electrons are in the n=1 energy level? how many electrons are in the n=2 energy level? how many electrons are in the n=3 energy level?

Which object is largest? star galaxy globular cluster planet?

What if the population of rabbits decrease, what would happen with foxes and owls?