A student argues that the scientific theory of the atom is not useful because it has undergone so many changes over time. Which best argues against the student's reasoning?

If you are traveling in a primary channel and you encounter a red and green marker (with the green band on top) when proceeding in an upstream direction, what must you do

Suppose you ride your bicycle to the library traveling at 0.5 km/min. It takes you 25 minutes to get to the library. How far did you travel?

Identify which of the following is a complete and balanced chemical equation

Which statement best describes the difference (s) between atoms and molecules? Atoms are the most basic units of an element whereas molecules are atoms that are chemically bonded together.

A thermodynamic system gains 1500j of heat from the surroundings, and does 3500j of work as a result. - a. determine the change in the internal energy. - if the system gains 1500j of heat but 3500j of work is done on the system: - b.

Velocity is: а - speed and direction. b - distance divided by time. c - always the same as speed. distance multiplied by time. d - distance multiplied by time

The gauge pressure in each of the four tires of an automobile is 230 kpa. if each tire has a "footprint" of 180 cm2 (area touching the ground), determine the mass of the car.

A bus travels 20 KM and 30 minutes what is average speed of the bus

What is the total number of atoms in the following formula? CaBr2

A lifeguard on a beach observes that waves have a speed of 7 m/s and a distance of 4.6m between wave crests. what is the period of the wave motion?