Which is an example of making a quantitative observation?

a. measuring the mass of metal used in a reaction

b. recording the color of a solid formed in a reaction

c. describing a liquid as having a slippery feel

d. rating an odor on how nice it smells

Although standard pressure is defined as 1atm, other units of pressure can also be used. It is common to report standard pressure using SI (standard international) units.

In major league baseball, the pitcher's mound is 60 feet from the batter. If a pitcher throws a 91 mph fastball, how much time elapses from when the ball leaves the pitcher's hand until the ball reaches the batter?

A car drives 5.0 km north, then 7.3 km east, then 5.3 km northeast, all at a constant velocity. If the car had to perform 2.6 * 106 J of work during this trip, what was the magnitude of the average frictional force on the car?

Why is a hollow pipe stronger than a solid pipe?

How is light described?

According to the kinetic-molecular theory, gases condense into liquids because of

What does sound travel throu better

How does a change in resistance affect the conductivity of a material? A) The lower the resistance, the worse the conductivity B) The lower the resistance, the better the conductivity C) The higher the resistance, the better the conductivity D) The

Two railroad cars, each of mass 6500 kg and traveling 80 km/h in opposite directions, collide head-on and come to rest. how much thermal energy is produced in this collision?

What is a result of using a machine?