Zirconium has an atomic number of 40. How many neutrons are there in an isotope of zirconium-92?

A horizontal line above the time axis of a speed vs. time graph means an object is ___. a zero b constant c decreasing

Which change will decrease the speed of a sound wave traveling through a gaseous matter?

In the equation for Ohm's law what does I stand for? A. current B. resistance C. kilowatts D. voltage

Fluids can flow and change shape to fit their containers. Which two states are fluids? O A. Solids and plasmas O B. Gases and solids O C. Solids and liquids D. Liquids and gases

What is the advantage of combining carbon from coal with steel?

What is the main optical element of a refracting telescope?

Two water manometers are connected to a tank of air. One leg of the manometer is open to 100kPa pressure (absolute) while the other leg is subjected to 90kPa. Find the difference in deflection between both manometers, Delta h_a - Delta h_b.

Most geologists believe that the dinosaurs became extinct 65 million years ago when a large comet or asteroid struck the earth, throwing up so much dust that the sun was blocked out for a period of many months. A.

If you drop a silver dollar off a building and it hits the ground in 10 seconds, how fast was the coin going just before it hit?

What is the weight of an with a mass of 32kg