There are many different ways to classify matter but one way to only use two categories for all matter. All matter can be classified as either

A) solids or liquid

B) mixtures or substances

C) atoms or molecules

D) elements or compounds

Which of thses is the best example of an "i" message

A frog is at the bottom of a 17-foot well. Each time the frog leaps, it moves up 3 feet. If the frog has not reached the top of the well, then the frog slides back 1 foot before it is ready to make another leap.

What is the relationship between the line current i l and the phase current i1 in a balanced delta system?

Technician A says that many power windows and power door locks use a permanent-magnet motor with a built-in circuit breaker and is reversible. Technician B says that the control switches and relays direct the current through the motor (s).

A 50-kg object is accelerating to the right at 10 m/s². What is the magnitude of the rightward net force acting on it (in Newtons) ?

A sound from a source has an intensity of 270 db when it is 1 m from the source. what is the intensity of the sound when it is 3 m from the source?

What experimental term is it when a ruler is dropped to the floor?

Where is most of the energy from incoming waves focused? A. spit B. headland C. underwater D. barrier beach

Exoplanets (planets outside our solar system) are an active area of modern research. Suppose you read an article stating that there is a newly discovered planetary system with three planets.

A car with a mass 1200 kg accelerates at 1.89 m/s2. What is the total force exerted by the car on the road (answer in N to two decimal places) ?