What type of energy transformations take place in a windmills

During a 4 hour trip, a boat sailed 70 km in 2 h. Then the boat did not move for 1 hour and traveled 26 km in the last hour. What was the boat's average speed?

Why is atomic radius not a well-defined quantity? a. The radius of a given atom is widely variable. b. Units of length are not small enough. c. The boundary of an electron cloud is not distinct. d.

What are the four ways to tell if a chemical change has occurred?

Which can be a solute in an aqueous solution? a solid, liquid, or gas b solid or gas solid or liquid d solid only

How many atoms are in Sodium, Carbon, Hydrogen, Oxygen, Fluorine, Boron, Lithium, Helium, Phosphorus and Sulfur?

What is the number of moles of 27.6g of lithium?

Air is transferred from a 75 L tank where the pressure is 125 psi and the temperture is 288 k to a tire with a volume of 6.1 L and a pressure of 25 psi. What is the new temperture.

Which of the following is a measure of randomness in a system? A) entropy. B) kinetic energy. C) potential energy. D) chemical energy.

What substance can be broken down by chemical means? A) ammonia B) aluminum C) antimony D) argon (Castle learning question)

How the law of conservation of mass could be useful for investigating chemical changes