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

Author Question: A recent announcement indicated that magnetic motors can be used to cool refrigerators. In the ... (Read 38 times)

clmills979

  • Hero Member
  • *****
  • Posts: 551
on: Jul 28, 2018
A recent announcement indicated that magnetic motors can be used to cool refrigerators. In the method, a gadolinium-based warms and cools off in response to application of a magnetic field. The gadolinium rotating wheel is the only moving part.
 
  Why might this be a breakthrough?

Question 2

A car drives down one hill and up another maintaining constant speed (the road is a V-shape with a rounded bottom).
 
  What can be said of the acceleration of the car along the left side of the V halfway down? What can be said of the acceleration of the car along the right side of the V halfway up? Where on the track is the acceleration the greatest? Explain.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

Ahnyah

  • Sr. Member
  • ****
  • Posts: 336
Reply #1 on: Jul 28, 2018
Answer to Question 1

Moving parts involve friction. Elimination of friction reduces waste of energy. It
remains to be seen whether this is a breakthrough.

Answer to Question 2

If that car has the same speed along the left side of the V, it must have an
acceleration of zero (because there is no change in speed or direction). Likewise, along the
straight right side of the V, it also has an acceleration of zero.
If the speed never changes, then the only place there can be an acceleration is at the bottom,
where the direction is changing. A change in direction means a change in the velocity.


clmills979

  • Member
  • Posts: 551
Reply 2 on: Jul 28, 2018
Excellent

daiying98

  • Member
  • Posts: 354
Reply 3 on: Yesterday
:D TYSM

« previous next »
 

Did you know?

Thyroid conditions cause a higher risk of fibromyalgia and chronic fatigue syndrome.

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?

The term bacteria was devised in the 19th century by German biologist Ferdinand Cohn. He based it on the Greek word "bakterion" meaning a small rod or staff. Cohn is considered to be the father of modern bacteriology.

Did you know?

The use of salicylates dates back 2,500 years to Hippocrates's recommendation of willow bark (from which a salicylate is derived) as an aid to the pains of childbirth. However, overdosage of salicylates can harm body fluids, electrolytes, the CNS, the GI tract, the ears, the lungs, the blood, the liver, and the kidneys and cause coma or death.

Did you know?

Fewer than 10% of babies are born on their exact due dates, 50% are born within 1 week of the due date, and 90% are born within 2 weeks of the date.

ending is impeded by the magnetic attraction between stick and stickase ending is impeded by the magnetic attraction between stick and stickase
Babcock’s Magnetic Dynamo Babcock’s Magnetic Dynamo
This severely corroded water pump could not circulate enough coolant to keep the engine cool. As a ... This severely corroded water pump could not circulate enough coolant to keep the engine cool. As a ...
The primary windings are inside the secondary windings on this General Motors coil. The primary windings are inside the secondary windings on this General Motors coil.
A TECH 2 scan tool is the factory scan tool used on General Motors vehicles. A TECH 2 scan tool is the factory scan tool used on General Motors vehicles.
Video: Leukemia

For a complete list of videos, visit our video library