Which of the following is the Sl unit used by chemists to measure the amount of an element or substance?

A. molecule

B. mole

C. atom

D. milliliter

Which is a complex molecule? A. H2 B. Ne C. CO D. H2O

If you adjusted the frequency to be lower than the resonant frequency, would the current amplitude have been less than, equal to, or greater than the current amplitude you found at resonance? Explain.

True or False: The tundra and taiga are known as cold biomes.

What sound frequency would a human ear NOT be able to detect? A. 100,000 Hertz B. 10,000 Hertz C. 100 Hertz D. 1,000 Hertz

An electrical power plant manages to transfer 88 percent of the heat produced in the burning of fossil fuel to convert water to steam. Of the heat carried by the steam, 40 percent is converted to the mechanical energy of the spinning turbine.

What does the slope of the line on this velocity versus time graph represent? A. positive deceleration B. zero acceleration C. positive acceleration D. negative acceleration

Which of the following objects has the greatest kinetic energy? a baseball flying through the air at 90 miles per hour a baseball flying through the air at 45 miles per hour a baseball flying through the air at 20 miles per hour a baseball sitting

Peter found an amazing fact in an amusement park when he tried to ride the Magic Mountain Superman. Powerful magnets accelerate a car and its riders from zero to 45 m/s in 7 seconds. Suppose the mass of the car and riders is 5,600 kg.

The formula s = 16t2 gives the distance an object falls due to gravity, where s is the distance in feet and t is the time in seconds. how many feet will the object fall in 6 seconds?

Consider equal volumes (say 1 l of a given substance in the solid, liquid, and gas phases. arrange them in order of decreasing mass based on the trend for the average substance.