subject

Physics, 29.06.2021 19:40 jamarengle2

What was the earliest energy source for humans? A. coal
B. oil
C. natural gas
D. wood

ansver

Answers: 1

Show answers

Another question on Physics

question

Physics, 22.06.2019 19:00

The direction of the current in an alternating current circuit remains constant. is direct. changes repeatedly. changes randomly.

Answers: 1

question

Physics, 22.06.2019 19:30

How many electrons in an atom could have these sets of quantum numbers? =3n=3 electronselectrons =4,ℓ=2n=4,ℓ=2 electronselectrons =6,ℓ=ℓ=−1n=6,ℓ=2,mℓ=−1

Answers: 3

question

Physics, 22.06.2019 22:30

Suppose astronomers built a 140-meter telescope. how much greater would its light-collecting area be than that of the 10-meter keck telescope? express your answer using two sign

Answers: 3

question

Physics, 23.06.2019 00:00

Three resistors are connected in series across a 15-v power supply. if the potential drops across resistors 1 and 2 are 4.1 volts and 3.1 volts, what is the exact potential drop (in volts) across resistor 3?

Answers: 2

You know the right answer?

What was the earliest energy source for humans? A. coal
B. oil
C. natural gas
D....

Questions

question

Mathematics, 14.04.2020 18:41

The following data represent a random sample of the ages of players in a baseball league. Assume that the population is normally distributed with a st...

question

Mathematics, 14.04.2020 18:41

Scores on the SAT Math section have mean average of 500 with a standard deviation of 100. What is the probability that a randomly selected student sco...

question

Physics, 14.04.2020 18:41

A(n) 71.1 kg astronaut becomes separated from the shuttle, while on a space walk. She finds herself 70.2 m away from the shuttle and moving with zero...

question

Mathematics, 14.04.2020 18:41

Jacob bought some tickets to see his favorite singer he bought some adult tickets and some children tickets for a total of 9 tickets the adult tickets...

question

Social Studies, 14.04.2020 18:41

Tom and Harriet, adult siblings, are taking their parents on a weekend trip. They pick up their father, Luther, at his house where he is singing a goo...

question

English, 14.04.2020 18:41

Which sentence shows a precise use of pronouns? A Kyle and joe were often partners in tennis but he was a better player. B kyle was...

question

Mathematics, 14.04.2020 18:41

Matt Brawn bought a diamond engagement ring for $10,800. His down payment was $3600. The balance was to be paid off in 24 monthly payments of $333.87....

question

Mathematics, 14.04.2020 18:41

In 1955, Life Magazine reported that a 25-year-old mother of three worked, on average, an 80 hour week. Recently, many groups have been studying wheth...

question

English, 14.04.2020 18:41

I asked Dr Strauss if Ill beat Algernon in the race after the operashun and he said maybe. If the operashun works Ill show that mouse I can be as smar...

question

Mathematics, 14.04.2020 18:41

In a randomly selected sample of 1169 men ages 35–44, the mean total cholesterol level was 210 milligrams per deciliter with a standard deviation of 3...

question

Mathematics, 14.04.2020 18:41

Need help math problem...

question

Mathematics, 14.04.2020 18:41

A survey of 200 students provides a sample mean of 7.10 hours worked with a standard deviation of 5 hours. Suppose that this confidence interval was (...

question

Social Studies, 14.04.2020 18:41

Dr. Cortez determined that the mean level of depression for both experimental groups was the same. However, it is important to not only look at the ce...

question

Mathematics, 14.04.2020 18:41

A personal-size pizza has the radius shown in the diagram. Will the pizza fit on a plate with a radius of 1...

question

Mathematics, 14.04.2020 18:41

Andrew started with a circle whose equation was (x - 2) 2 + (y + 3) 2 = 4. He translated the graph so that its equation changed to (x + 2) 2 + (y - 3)...

question

Mathematics, 14.04.2020 18:41

A number of reports in the medical literature suggest that the season of birth and the incidence of schizophrenia may be related, with a higher propor...

question

Business, 14.04.2020 18:41

A mortgage loan in which the borrower makes a down payment of 5 percent of the purchase price using money loaned to him by a family member is riskier...

question

Mathematics, 14.04.2020 18:41

Grant earns 10 points for each bulls-eye that he hits in an archery competition. Which equation shows the relationship between the number of bulls-eye...

question

Social Studies, 14.04.2020 18:41

A celebrity actress experiences ever-increasing levels of professional acclaim following each successful movie role. Yet with each success, she experi...

question

Health, 14.04.2020 18:41

A 35-year-old man is at his follow-up visit for GERD. Antacids have not been effective for his reflux, and the health care provider is prescribing a p...

More questions: Physics Another questions

Questions on the website: 13722362