What cause a comet to look like it has a tail trailing behind it

A scientist finds a piece of rock in a crater. He analyzes the rock and realizes that the composition is mostly of iron and nickel. He claims that he found a meteor. What is most likely the scientist's error?

What is the preferable form of carbohydrate for eating?

Compare the compositions and functions of carhohudrates and lipids

In a water molecule, which atom has the strongest attraction for shared electrons? hydrogen oxygen hydroxide ion both atoms attract electrons with equal strength neither atom attracts the electrons

Who was the first person to discovered firefiles

A cylinder of oxygen gas contains 2.80 mol of 02. If the volume of the cylinder is 8.58 L, what is the pressure of the 02 if the gas temperature is 294 K.

A housefly's average life span is 3 days. How many minutes is that

The elements in Groups 1 AU) and 7A (17) are all quite reactive. What is a major difference between them?

A certain radioactive element has a half-life of one hour. if you start with 1.0 gram of the element at noon, how much of the radioactive element will be left at 2 p. m.? 0.50 grams 0.25 grams 0.125 grams 0.0 grams

Name two bases which react with dillute sulfuric acid to give zinc sulfate