When a certain element is excited with electricity, we see three main lines in its emission spectrum: two red lines and one orange line. what would the absorption spectrum of this element look like?

What happens during the intake and compression strokes of a four stroke engine?

Why can a batter hit a pitched baseball farther than a ball tossed in the air by the batter?

When a shot putter exerts a force of 140 N on a 7.5 kg shot, what its is acceleration?

Describe the possible range of wavelengths

What medium is most effective for a school play advertisement? A. a flyer posted around school B. an ad in the newspaper C. an ad on the Internet D. an ad on television

Electricity problem (coulomb's law)

An observer (O) spots a plane (P) taking off from a local airport and flying at a 29° angle horizontal to her line of sight and located directly above a tower (T). The observer also notices a bird (B) circling directly above her.

In order for convection to occur, you must have

Explain Newton's First Law for the following. If you walk across the room holding a ball, when should you drop it to ensure that it lands on a target? Before, after or when you are directly on the target?

In what way are all forms of potential energy the same?