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

Author Question: Thousands of years ago, after humans began settling in villages, their settlements were energized by ... (Read 141 times)

joesmith1212

  • Hero Member
  • *****
  • Posts: 549
on: Jul 29, 2018
Thousands of years ago, after humans began settling in villages, their settlements were energized by
 
  A) gravitational energy.
  B) thermal energy.
  C) nuclear energy.
  D) chemical energy.
  E) radiant energy.

Question 2

Enzo throws a rock horizontally with a speed of 12 m/s from a bridge. It falls for 2.28 s before reaching the water below. Ignore air. Just as the rock reaches the water, find (a) the horizontal component of its velocity.
 
  (b) the speed with which it is moving.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

alexisweber49

  • Sr. Member
  • ****
  • Posts: 311
Reply #1 on: Jul 29, 2018
Answer to Question 1

E

Answer to Question 2

(a) 12 m/s (b) 25 m/s


joesmith1212

  • Member
  • Posts: 549
Reply 2 on: Jul 29, 2018
Great answer, keep it coming :)

marict

  • Member
  • Posts: 304
Reply 3 on: Yesterday
:D TYSM

« previous next »
 

Did you know?

The first successful kidney transplant was performed in 1954 and occurred in Boston. A kidney from an identical twin was transplanted into his dying brother's body and was not rejected because it did not appear foreign to his body.

Did you know?

It is difficult to obtain enough calcium without consuming milk or other dairy foods.

Did you know?

About 3.2 billion people, nearly half the world population, are at risk for malaria. In 2015, there are about 214 million malaria cases and an estimated 438,000 malaria deaths.

Did you know?

The Centers for Disease Control and Prevention has released reports detailing the deaths of infants (younger than 1 year of age) who died after being given cold and cough medications. This underscores the importance of educating parents that children younger than 2 years of age should never be given over-the-counter cold and cough medications without consulting their physicians.

Did you know?

Methicillin-resistant Staphylococcus aureus or MRSA was discovered in 1961 in the United Kingdom. It if often referred to as a superbug. MRSA infections cause more deaths in the United States every year than AIDS.

Methicilli ...
The skullcap from Trinil, Java is the type specimen for H. erectus and is about 900,000 years old. The skullcap from Trinil, Java is the type specimen for H. erectus and is about 900,000 years old.
The Upper Cave at Zhoukoudian yields ages of about 25,000 years for Homo sapiens. The Upper Cave at Zhoukoudian yields ages of about 25,000 years for Homo sapiens.
The human eye, a product of 600 million years of evolution (Lamb, Collin, & Pugh, 2007). The human eye, a product of 600 million years of evolution (Lamb, Collin, & Pugh, 2007).
Climate change occurs over millions of years Climate change occurs over millions of years
Remaining health-adjusted life expectancy (years) at age 25 Remaining health-adjusted life expectancy (years) at age 25
Opener Alignment comparing DNA sequence for the leptin gene from dogs (top) and humans (bottom) Opener Alignment comparing DNA sequence for the leptin gene from dogs (top) and humans (bottom)
Video: Blood Flow Through the Kidneys

For a complete list of videos, visit our video library