Select the correct answer.

Haley rubs a cotton cloth along a plastic strip. The plastic strip becomes positively charged. Why did this happen?

What property of the mixture of gelatin in water tells you that the mixture is not a solution

Match each organ to its function. Tiles bone heart stomach lung Pairs pumps blood through the body Both provides structure for the body Both breaks down food into small particles Both oxygenates blood

Which object is acceleratin

The most massive star known in the universe is thought to be R136a1, which may be as much as 256 times the mass of our sun. What do R136a1 and our sun have in common? A) They have the same amount of helium. B) They have the same amount of hydrogen.

Sandra heated a 12.3-g piece of iron to 100oC. She then placed the iron in a calorimeter with a heat capacity of 10.4 J/oC. The reading on the calorimeter temperature gauge rose from 25oC to 30oC. How much heat did the piece of iron lose? A: 2.

Describe the relationship between Sun Angle and Sun Length. Explain this change occurs ... ?

What is an isotope? how is the mass calculated?

How many liters of hydrogen are needed to produce 34 grams NH3

How does temperature change affect waters cohesion?

Does NH3 dissolve in acetone?