How do you reduce friction

Which of the following statements is true concerning ideal gases? A. The temperature of the gas sample is directly related to the average velocity of the gas particles. B. At STP, 1.0 L of Ar (g) contains about twice the number of atoms as 1.

A tortoise is walking in the desert. It walks 6.4 meters in 4 minutes. What is its speed?

Matter is needed to transfer thermal energy by A. Conduction B. Convection C. Radiation D. Both A & B.

If you have a mass of 50 kg on Earth, what is your weight in Newtons?

Nami conducts an investigation on plants. She places a grow light on a timer to give the plants different amounts of light to see if this would affect their growth.

What is the density of a rock which has a mass of 35 grams and a volume of 7.0 cubic centimeters?

Which statement best describes the relative conductivity of semiconductors? a. They are the most conductive elements. b. They are the least conductive elements. c. They are more conductive than metals but less conductive than nonmetals. d.

A tire swing is released from some initial height such that the speed of the tire at the bottom of the swing is 2.5 m/s. What is the initial height of the tire? Note: g = 9.8 m/s2 A 0.13m B 0.16m C 0.32m D 3.1 m

Paleoclimatologists study the climate and its changes throughout earths history. what observation by paleoclimatologists led scientists to predict that the average temperature of the planet is rising due to the combustion of fossil fuels?

Which is bigger, a kilometer or a mile?