« 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 126 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?

More than 2,500 barbiturates have been synthesized. At the height of their popularity, about 50 were marketed for human use.

Did you know?

About 60% of newborn infants in the United States are jaundiced; that is, they look yellow. Kernicterus is a form of brain damage caused by excessive jaundice. When babies begin to be affected by excessive jaundice and begin to have brain damage, they become excessively lethargic.

Did you know?

Certain chemicals, after ingestion, can be converted by the body into cyanide. Most of these chemicals have been removed from the market, but some old nail polish remover, solvents, and plastics manufacturing solutions can contain these substances.

Did you know?

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

Did you know?

You should not take more than 1,000 mg of vitamin E per day. Doses above this amount increase the risk of bleeding problems that can lead to a stroke.

A 3-tonne (3.0-long-ton; 3.3-short-ton) great white shark off Isla Guadalupe A 3-tonne (3.0-long-ton; 3.3-short-ton) great white shark off Isla Guadalupe
Local/long distance cell Signaling Local/long distance cell Signaling
(a) The relative age ranges of different dating techniques depend upon the half-life of the system u (a) The relative age ranges of different dating techniques depend upon the half-life of the system u
A typical peak-and-hold fuel-injector waveform. Most fuel injectors that measure less than 6 ohms ... A typical peak-and-hold fuel-injector waveform. Most fuel injectors that measure less than 6 ohms ...
A horizontal, 2.00 m long, 3.00 kg uniform beam that lies along the east-west di A horizontal, 2.00 m long, 3.00 kg uniform beam that lies along the east-west di
What is the current in Figure 16-1(b) if the diode is made of silicon and the polarity of the ... What is the current in Figure 16-1(b) if the diode is made of silicon and the polarity of the ...
Video: Chloroplast Structure & Light Dependent Reactions (Photosystem 1 and 2 Cyclic Electron Flow)

For a complete list of videos, visit our video library