Which of the following is true regarding current in an external circuit

What are two ways that magnetism is created? Use evidence from the text to support your answer.

What effect would adding additional neutrons have on the forces in a nucleus?

A truck moving at 36 m/s passes a police car moving at 45 m/s in the opposite direction. If the frequency of the siren is 500 Hz relative to the police car, what is the change in frequency (in Hz) heard by an observer in the truck as the two

A changing climate has strong implications for biodiversity. Studies of fossil and pollen distribution show that species are very sensitive to climate changes.

In which of the following scenarios is the greatest amount of work accomplished?

Which of the following is the best definition of an isotope? A. elements of the same kind with different numbers of neutrons B. elements of the same kind that have lost electrons C. elements of the same kind that have different electrical charges

Two cars approach each other; both cars are moving westward, one at 85 km/h, the other at 54 km/h. what is the magnitude of the velocity of the first car relative to (in the frame of reference of) the second car? answer in units of km/h.

What usually causes high concentration of minerals to form

The courtroom role that possesses the most discretion is?

What is the main purpose of a simple machine?