« previous next »

Author Question: Conventional automobile efficiencies cannot conceivably be higher than about 25, even with perfect ... (Read 97 times)

FButt

  • Hero Member
  • *****
  • Posts: 519
on: Jul 29, 2018
Conventional automobile efficiencies cannot conceivably be higher than about 25, even with perfect engineering. This is due to
 
  A) the law of conservation of energy.
  B) frictional loses inside the car plus unburned hydrocarbons.
  C) the second law of thermodynamics.
  D) road friction.
  E) air resistance plus road friction.

Question 2

Roughly how many different elements are there?
 
  A) 1000
  B) 20
  C) many more than 1000
  D) 100
  E) 4


Pswine

  • Sr. Member
  • ****
  • Posts: 328
Reply #1 on: Jul 29, 2018
Answer to Question 1

C

Answer to Question 2

D


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question

FButt

  • Hero Member
  • *****
  • Posts: 519
Reply #2 on: Jul 29, 2018
TY


Pswine

  • Sr. Member
  • ****
  • Posts: 328
Reply #3 on: Jul 29, 2018
You're welcome


« previous next »
 

Did you know?

Once thought to have neurofibromatosis, Joseph Merrick (also known as "the elephant man") is now, in retrospect, thought by clinical experts to have had Proteus syndrome. This endocrine disease causes continued and abnormal growth of the bones, muscles, skin, and so on and can become completely debilitating with severe deformities occurring anywhere on the body.

Did you know?

Symptoms of kidney problems include a loss of appetite, back pain (which may be sudden and intense), chills, abdominal pain, fluid retention, nausea, the urge to urinate, vomiting, and fever.

Did you know?

Drying your hands with a paper towel will reduce the bacterial count on your hands by 45–60%.

Did you know?

The human body produces and destroys 15 million blood cells every second.

Did you know?

Walt Disney helped combat malaria by making an animated film in 1943 called The Winged Scourge. This short film starred the seven dwarfs and taught children that mosquitos transmit malaria, which is a very bad disease. It advocated the killing of mosquitos to stop the disease.

Increasing access to care for teen mothers is important because they have a higher rate of pregnancy ... Increasing access to care for teen mothers is important because they have a higher rate of pregnancy ...
The risk of dying before the age of 65 gets lower as family income gets higher. The risk of dying before the age of 65 gets lower as family income gets higher.
Frequent dining on fast food, which tends to be higher in fat and carbohydrates, may be convenient ... Frequent dining on fast food, which tends to be higher in fat and carbohydrates, may be convenient ...
The main avenue to the upward social mobility reviewed in the text has been higher education. The main avenue to the upward social mobility reviewed in the text has been higher education.
A compression gauge designed for the higher compression rate of a diesel engine should be used when ... A compression gauge designed for the higher compression rate of a diesel engine should be used when ...
Oil pressure relief valves are spring loaded. The stronger the spring tension, the higher the oil ... Oil pressure relief valves are spring loaded. The stronger the spring tension, the higher the oil ...
Video: Sperm Formation

For a complete list of videos, visit our video library