This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: It is believed that ____________________ was used as the main source of energy for thousands of ... (Read 29 times)

skymedlock

  • Hero Member
  • *****
  • Posts: 561
on: Jul 21, 2018
It is believed that ___________________ _ was used as the main source of energy for thousands of years before other sources were developed.
 
  Fill in the blank(s) with correct word

Question 2

What is the highest component of natural gas?
 
  a. Propane c. Butane
  b. Hydrogen sulfide d. Methane


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

tofugiraffe

  • Sr. Member
  • ****
  • Posts: 319
Reply #1 on: Jul 21, 2018
Answer to Question 1

fire

Answer to Question 2

D


skymedlock

  • Member
  • Posts: 561
Reply 2 on: Jul 21, 2018
Excellent

EAN94

  • Member
  • Posts: 307
Reply 3 on: Yesterday
Wow, this really help

« previous next »
 

Did you know?

The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.

Did you know?

Patients should never assume they are being given the appropriate drugs. They should make sure they know which drugs are being prescribed, and always double-check that the drugs received match the prescription.

Did you know?

A serious new warning has been established for pregnant women against taking ACE inhibitors during pregnancy. In the study, the risk of major birth defects in children whose mothers took ACE inhibitors during the first trimester was nearly three times higher than in children whose mothers didn't take ACE inhibitors. Physicians can prescribe alternative medications for pregnant women who have symptoms of high blood pressure.

Did you know?

To prove that stomach ulcers were caused by bacteria and not by stress, a researcher consumed an entire laboratory beaker full of bacterial culture. After this, he did indeed develop stomach ulcers, and won the Nobel Prize for his discovery.

Did you know?

Normal urine is sterile. It contains fluids, salts, and waste products. It is free of bacteria, viruses, and fungi.

A Mitochondrion Converts Energy from Fuel Molecules into ATP A Mitochondrion Converts Energy from Fuel Molecules into ATP
Tracing the Source of a Water-Borne Disease Tracing the Source of a Water-Borne Disease
Changes in Synaptic Density From Birth to Age 2 Synaptic connections increase throughout the first Changes in Synaptic Density From Birth to Age 2 Synaptic connections increase throughout the first
Alternative methods for locating the CPT Main Term. Alternative methods for locating the CPT Main Term.
Renewable Energy Efforts Renewable Energy Efforts
A slice of cheese pizza has a caloric content of 150 Cal. If this energy could b A slice of cheese pizza has a caloric content of 150 Cal. If this energy could b
Video: Second Messengers in the Inositol-lipid Signaling Pathway

For a complete list of videos, visit our video library