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

Author Question: A heat engine ________. a. converts work into heat energy b. needs a temperature difference to be ... (Read 38 times)

tth

  • Hero Member
  • *****
  • Posts: 579
on: Jul 28, 2018
A heat engine ________.
 a. converts work into heat energy
  b. needs a temperature difference to be able to work
  c. can be 100 efficient in the absence of friction
  d. needs electricity to be able to run

Question 2

A hunter wishes to cross a river that is 1.5 km wide and flows with a velocity of 5.0 km/h parallel to its banks. The hunter uses a small powerboat that moves at a maximum speed of 12 km/h with respect to the water. What is the minimum time for crossing?


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

EAN94

  • Sr. Member
  • ****
  • Posts: 307
Reply #1 on: Jul 28, 2018
Answer to Question 1

b

Answer to Question 2

0.14 h


tth

  • Member
  • Posts: 579
Reply 2 on: Jul 28, 2018
Excellent

peter

  • Member
  • Posts: 330
Reply 3 on: Yesterday
Gracias!

« previous next »
 

Did you know?

Oliver Wendell Holmes is credited with introducing the words "anesthesia" and "anesthetic" into the English language in 1846.

Did you know?

Sperm cells are so tiny that 400 to 500 million (400,000,000–500,000,000) of them fit onto 1 tsp.

Did you know?

The U.S. Preventive Services Task Force recommends that all women age 65 years of age or older should be screened with bone densitometry.

Did you know?

All adults should have their cholesterol levels checked once every 5 years. During 2009–2010, 69.4% of Americans age 20 and older reported having their cholesterol checked within the last five years.

Did you know?

Sildenafil (Viagra®) has two actions that may be of consequence in patients with heart disease. It can lower the blood pressure, and it can interact with nitrates. It should never be used in patients who are taking nitrates.

Energy flow through an ecosystem. Energy flow through an ecosystem.
Evolution of the Sun's luminosity, radius and effective temperature compared to the present Sun Evolution of the Sun's luminosity, radius and effective temperature compared to the present Sun
Bipolar disease. The term bipolar means “pertaining to two poles.” The individual with this form of Bipolar disease. The term bipolar means “pertaining to two poles.” The individual with this form of
Effect of increasing temperature or lowering deltGo+ on the rates of reactions Effect of increasing temperature or lowering deltGo+ on the rates of reactions
Comparison of energy consumption in developing and industrialized nations Comparison of energy consumption in developing and industrialized nations
Expressing amounts of energy in different energy units is necessary to solve many chemistry ... Expressing amounts of energy in different energy units is necessary to solve many chemistry ...
Video: Osmosis - water transport

For a complete list of videos, visit our video library