Science questions and answers - page 2


Who invented the light bulb

I've heard its thomas edison
10 days ago with 2 answers.

If you have an ore that contains Fe3O4 what is the mass of it?

An ore contains Fe3O4 and no other iron. The iron in a 56-gram sample of the ore is all converted by a series of chemical reactions to Fe2O3. Th...
11 days ago with 0 answers.

I need help on how to solve a percent yield problem

A 45.1 g of iron ore is treated as follows. The iron in the sample is all converted by a series of chemical reactions to Fe2O3. The mass of Fe2O...
11 days ago with 1 answer.

SCIENCE HOMEWORK HELP ASAP!!!

Hey...I Need to know if this is right. I have Science homework. Its on a cell. I am Compairing a Cell to Walmart. Is this right? Nucleus: Boss Cy...
11 days ago with 5 answers.

How many colors does the rainbow really have, and wich?

How many colors does the rainbow really have, and wich?
13 days ago with 10 answers.

do you like science???

YES or NO.I hate science!!!
14 days ago with 15 answers.

What are the merits of cloning?

I need strong and detailed answers.
15 days ago with 4 answers.

Calculate time in Physics

An object is released from rest off the top of a building. The height of the building from the ground is 20m. Gravitationsl pull is 9.8m/s2 ( Ignor...
16 days ago with 1 answer.

Science Question

Finish the sentence... Convection is due to a hot liquid or gas...? One word missing. Thanks
18 days ago with 1 answer.

help!

What is the name given to many of the elemnts that have more that one oxidation number?? is it isotopes?
18 days ago with 1 answer.

Whats joining small molecules to make long chains called?

Whats joining small molecules to make long chains called?
20 days ago with 1 answer.

when do females stop growing?

I was just curious because my science teacher was like they stop at 16 and I always thought it just depends on the persons body. but who knows?
20 days ago with 7 answers.

Oxygen

What are some elements that can combine with oxygen
21 days ago with 6 answers.

How long would it take..Mars to Earth radio transmission?

If I send a message from mars.How long before some one responds from Earth?
22 days ago with 4 answers.

Coral Reef Food Web!!!

Okay, So I have a project on "Coral reefs" and I don't know wats WRONG with the internet but theres like NO websites that are giving me an "aaccttu...
22 days ago with 1 answer.