What is the speed of sound in air when the temperature is 20°C?

319 m/s

331 m/s

343 m/s

219 m/s

What do wind turbines, hydroelectric dams, and ethanol plants have in common

Choose all the answers that apply. By what method is water added to the atmosphere? O transpiration evaporation precipitation condensation sublimation

If a 4.0Ω resistor, a 6.0Ω resistor, and an 8.0Ω resistor are connected in parallel across a 12 volt battery, what is the total current of the circuit? 6.7 amps 18 amps 1.8 amps 3.6 amps

What groupings on the periodic table are made up of elements that react similarly? 1. groups/families 2. metals, nonmetals, metalloids 3. periods 4. series

A truck accelerating at 0.0083 meters/second2 covers a distance of 5.8 * 104 meters. If the truck's mass is 7,000 kilograms, what is the work done to reach this distance?

The scientific method begins with recognizing a problem. The recognized problem in this scenario is, "Why is the printer in the office not working?" Choose the hypotheses that are testable and from which an experiment can be formed.

The correctly balanced equation for H2O2 → H2O + O2 is

How would an unbalanced chemical equation convey misleading information about what took place during a chemical reaction?

A car rounds a 75-m radius curve at a constant speed of 18 m/s. a ball is suspended by a string from the ceiling the car and moves with the car. the angle between the string and the vertical is:

Emission of light from an atom occurs when an electron