Suppose you needed to build a raft to cross a fast-moving river. Describe the physical and chemical properties of the raft that would be important to ensure your safety.

An insulated rigid tank contains 4 kg of argon gas at 450 kpa and 30°c. a valve is now opened, and argon is allowed to escape until the pressure inside drops to 200 kpa.

A baseball is thrown straight upward on the moon with an initial speed of 35 m/s. Compute: (a) the maximum height reached by the ball. > (b) the time taken to reach that height. --> (c) its velocity 30 s after it is thrown.

Sodium and potassium are positively charged ions called cations, and chloride and phosphate form negatively charged ions called anions. Select one: True False

1. A student bicycled 12 kilometers east in 2 hours. What was the student's average velocity during the trip?

What is the relationship between P - and S-waves?

If 2 grams of element X combine with 4 grams of element Y to form compound XY, how many grams of element Y would combine with 46 grams of X to form the same compound?

How do positive and negative charges interact with each other?

What is electricity

What happens to the density as one progresses through the layers of the earth from the lithosphere toward the inner core

What is tiny holes on the surface of a plant?