« previous next »

Author Question: How long is a wire made from 200 cm3 of copper if its resistance is 8.5 ohms? The resistivity of ... (Read 136 times)

jayhills49

  • Hero Member
  • *****
  • Posts: 559
on: Jul 28, 2018
How long is a wire made from 200 cm3 of copper if its resistance is 8.5 ohms? The resistivity of copper is 1.7  105 Wm.
 a. 10 m
  c. 7.1 m
  b. 2.2  102 m
  d. 3.0  103 m

Question 2

A rotating flywheel can be used as a method to store energy. If it has 2.0  106 J of kinetic energy when rotating at 400 rad/s, and if a frictional torque of 4.0 Nm acts on the system, in what interval of time would the flywheel come to rest?
 a. 3.5 min
  c. 14 min
  b. 42 min
  d. 21 min


tennis14576

  • Sr. Member
  • ****
  • Posts: 334
Reply #1 on: Jul 28, 2018
Answer to Question 1

A

Answer to Question 2

B


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question

jayhills49

  • Hero Member
  • *****
  • Posts: 559
Reply #2 on: Jul 28, 2018
Both answers were spot on, thank you once again


tennis14576

  • Sr. Member
  • ****
  • Posts: 334
Reply #3 on: Jul 28, 2018
Great! Please up vote :D


« previous next »
 

Did you know?

Though newer “smart” infusion pumps are increasingly becoming more sophisticated, they cannot prevent all programming and administration errors. Health care professionals that use smart infusion pumps must still practice the rights of medication administration and have other professionals double-check all high-risk infusions.

Did you know?

The immune system needs 9.5 hours of sleep in total darkness to recharge completely.

Did you know?

Your heart beats over 36 million times a year.

Did you know?

Essential fatty acids have been shown to be effective against ulcers, asthma, dental cavities, and skin disorders such as acne.

Did you know?

Pope Sylvester II tried to introduce Arabic numbers into Europe between the years 999 and 1003, but their use did not catch on for a few more centuries, and Roman numerals continued to be the primary number system.

Blocked at every turn by congressional Republicans who hated him, President Obama turned to techniqu Blocked at every turn by congressional Republicans who hated him, President Obama turned to techniqu
Emanuel Leutze’s Washington Crossing the Delaware (1851) is riddled with historical inaccuracies, mo Emanuel Leutze’s Washington Crossing the Delaware (1851) is riddled with historical inaccuracies, mo
A healthy diet is made up of well-balanced nutrients. A healthy diet is made up of well-balanced nutrients.
If an injector has the specified resistance, this does not mean that it is okay. This injector had ... If an injector has the specified resistance, this does not mean that it is okay. This injector had ...
Beverages Made Over Better Beverages Made Over Better
Experiments showing that long- or short-day plants flower in response to night length. Each horizont Experiments showing that long- or short-day plants flower in response to night length. Each horizont
Video: Component of feedback systems & Communication and regulation of body systems

For a complete list of videos, visit our video library