John is traveling north at 20 meters/second and his friend Betty is traveling south at 20 meters/second. If north is the positive direction, what are John and Betty's speeds?

Which of these was a characteristic of the Thomson model of the atom, but not the Dalton model? negatively charged electrons positive charge concentrated at the center of the atom unequal positive and negative charges indivisible atoms

Is sodium oxide a compound or element?

Which of the following statements about the discharging of a capacitor through a lightbulb are correct? a) Electrons in the wires flow away from the negative plate, toward the positive plate, reducing the charge on the plates.

How are metallic bonds formed? A) Valence electrons are transferred between atoms. B) Valence electrons are shared between two atoms C) Valence electrons are shared among many atoms creating a "sea of electrons".

Which of the following is the primary difference between generating electricity in a coal-fired plant compared to a nuclear plant?

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) ?