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

Author Question: If the communication lifetime of civilizations in our galaxy is 10,000 years and our galaxy is 13 ... (Read 40 times)

Yolanda

  • Hero Member
  • *****
  • Posts: 757
on: Jul 27, 2018
If the communication lifetime of civilizations in our galaxy is 10,000 years and our galaxy is 13 billion years old, what is the chance of us detecting another intelligent civilization now?
 
  A) 1 in 13,000
  B) 1 in 1,300,000
  C) 1 in 1300
  D) 1 in 130,000

Question 2

Water runs out of a horizontal drainpipe at the rate of 120. liters per minute. It falls 3.20 m to the ground. Assuming the water doesn't splash up, what average force does it exert on the ground?
 
  A) 12.0 N
  B) 19.6 N
  C) 15.8 N
  D) 8.88 N
  E) 6.20 N


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

kescobar@64

  • Sr. Member
  • ****
  • Posts: 324
Reply #1 on: Jul 27, 2018
Answer to Question 1

B

Answer to Question 2

C


Yolanda

  • Member
  • Posts: 757
Reply 2 on: Jul 27, 2018
:D TYSM

duy1981999

  • Member
  • Posts: 341
Reply 3 on: Yesterday
Thanks for the timely response, appreciate it

« previous next »
 

Did you know?

Hypertension is a silent killer because it is deadly and has no significant early symptoms. The danger from hypertension is the extra load on the heart, which can lead to hypertensive heart disease and kidney damage. This occurs without any major symptoms until the high blood pressure becomes extreme. Regular blood pressure checks are an important method of catching hypertension before it can kill you.

Did you know?

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

Did you know?

Though the United States has largely rejected the metric system, it is used for currency, as in 100 pennies = 1 dollar. Previously, the British currency system was used, with measurements such as 12 pence to the shilling, and 20 shillings to the pound.

Did you know?

Approximately 500,000 babies are born each year in the United States to teenage mothers.

Did you know?

By definition, when a medication is administered intravenously, its bioavailability is 100%.

The Long Valley Caldera Erupted the Bishop Ash 760,000 Years Ago The Long Valley Caldera Erupted the Bishop Ash 760,000 Years Ago
The approval of a new drug is a four-stage process: (1) preclinical investigation, (2) clinical inve The approval of a new drug is a four-stage process: (1) preclinical investigation, (2) clinical inve
Women who reported one, two, or three or more major life events in the past 5 years were ... Women who reported one, two, or three or more major life events in the past 5 years were ...
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).
Prevalence of lifetime mood disorders for Canadian men and women age 55 years and over Prevalence of lifetime mood disorders for Canadian men and women age 55 years and over
A mortgage loan of $132,000 at 6% compounded semiannually is to be amortized over 25 years by ... A mortgage loan of $132,000 at 6% compounded semiannually is to be amortized over 25 years by ...
Video: DNA Sequences - Dideoxy Sequencing

For a complete list of videos, visit our video library