Scientists who study races and their origins are called

A. anthropologists.

B. ethnologists.

C. paleontologists.

D. sociologists.

Study the scenario. An object is at rest. At five seconds, someone comes over and pushes the object forward with a force of 10 N. Which of the following choices describes the force needed to keep the object in static equilibrium? 1.

The pitch of a sound wave is related to wrich property? A Wavelength B. Amplitude C. Volume D. Frequency

If the frequency of the radio station is 88.1MHz (8.81 •10^7Hz), what is the wavelength of the wave used by the radio station for its broadcast? The answer should have three significant figures

A bookshelf is 2m long, with supports at its end (p and q). A book weighing 10N is placed in the middle of the shelf. what are the upward forces acting on p and q. if the book is moved 50 cm from q, what are the forces at p and q now?

Radar can be used to measure the distance from the sun to the earth. a) The speed of the wave is 3x10^8 m/s and the distance to the sun is 1.

Charlotte, a 60.0-kg skin diver, shoots a 2.0-kg spear with a speed of 15 m/s at a fish who darts quickly away without getting hit.

All objects are attracted to each other by the force of a. weight. b. mass. c. inertia. d. gravity.

landslides and mudslides caused by lava flows are ___ deadly than the lava flow itself. a. more b. less

3. How is electric potential different than electric potential energy?

Ethan pushes a wooden box across a carpet floor then he pushes the same box across a smooth marble floor why does Ethan find it easier to push the box on the marble floor than carpet floor