What essential characteristic does a good experiment have? a. a control group is given the experimental treatment. b. a single variable is tested. c. a control is used. d. both b and c

Charlie flew from Phoenix to Tucson, a distance of 100 miles, at a constant speed of 100 mph. He then returned at a constant speed of 50. mph. What was his average speed?

Katya listed major questions that scientists try to answer when they classify organisms. Her list included the following questions: How many living things are there? What are the characteristics that define living things?

vertical cylinder with a heavy piston contains air at 300 K. The initial pressure is 2.00 3 105 Pa, and the initial volume is 0.350 m3. Take the molar mass of air as 28.9 g/mol and assume CV 5 52 R.

2 general categories of factors that determine how we look and behave, and how do they influence us?

A sparrow is flying around in a circle at a constant speed and height. there is air resistance. In what direction is the net force of the sparrow on the air as the sparrow flies. 1. outward and downward 2. Inward and Downward 3.

How many Oxygen (O) atoms are in the following? H2O + CO2 4 3 2

How does surface roughness affect friction

Why does it hurt your hands when you carry heavy shopping in carrier bags?

Why did scientists choose carbon as a base for the atomic mass unit? Which isotope of carbon did they use?

What organelle is found in all animal cells and some plant cells