Thousands of years ago, giraffes with short necks were common within giraffe populations. Nearly all giraffe populations today have long necks. This difference could be due to

What is an atomic orbital

A speck of dust on a spinning dvd has a centripetal accelera - tion of 20 m/s2. a. what is the acceleration of a different speck of dust that is twice as far from the center of the disk? b.

Lindsey throws a hard rubber ball against a wall. Describe the forces that act on the ball when it hits the wall and how the forces affect the motion of the ball. How do the action force and reaction force compare?

Electrical current is defined as The capacity to store charge The flow of electrical charge per unit time The amount of stored electrical energy The voltage of the battery

How can you magnetize an item that is ferromagnetic? heat it spin it rub it with a soft cloth place it in a magnetic field

Which of the following is evidence that groundwater causes erosion and deposition?

Which project involved the goal of orbiting a manned spacecraft around earth? A. Mercury B. Apollo C. Gemini D. Skylab

Which type of listening response includes the use of head nods, facial expressions, and short utterances such as "uh-huh" that signal your interest to the speaker?

During eccentric muscle contraction, the muscle

What is a string theory?