Night and day have approximately equal length at what time or times of the year?

5N of force is applied to move a large nail a distance of 10 cm from an electromagnet on a frictionless table. The nail is then released.

What evidence supports the ages of our planets, moon, sun, and asteroids

What is the slope of a line that is perpendicular to a line whose equation is - 2y=3x+7 Enter your answer in the box.

Which factor affects the force of gravity between objects? Check all that apply.

Select the group of elements that include only those that are either colorless, odorless gases or shiny, silvery, soft metals. A) radon, neon, calcium B) neon, bromine, barium C) beryllium, iodine, krypton D) lithium, potassium, fluorine

Why do charges build up in a cloud

How does the wave model of electrons orbiting the nucleus account for discrete energy values?

An ecosystem is all the populations of organisms that live together and A. the microorganisms that depend on them. B. the organisms that generate energy from sunlight. C. the physical factors with which they interact. D.

Which statement about magnetic poles is accurate? A) Same magnetic poles attract, while different magnetic poles repel. B) Same magnetic poles attract, while different magnetic poles attract.

Power is measured in: A) J/s B) J2/s C) s/J D) s2/J