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

Author Question: Two wires with the same resistance have the same diameter but different lengths. If wire 1 has ... (Read 82 times)

ec501234

  • Hero Member
  • *****
  • Posts: 573
on: Jul 28, 2018
Two wires with the same resistance have the same diameter but different lengths. If wire 1 has length L1 and wire 2 has length L2, how do L1 and L2 compare if wire 1 is made from copper and wire 2 is made from aluminum? The resistivity of copper is 1.7  105 Wm and the resistivity of aluminum is 2.82  105 Wm.
 a. L1 = 0.36 L2
  c. L1 = 0.60 L2
  b. L1 = 2.8 L2
  d. L1 = 1.7 L2

Question 2

An initially installed flywheel can store 106 J of kinetic energy when rotating at 300 rad/s. It is replaced by another flywheel of the same size but made of a stronger material. If its mass is the same as that of the original, and it is now capable of achieving a rotational speed of 600 rad/s, what maximum energy can be stored?
 a. 40  105 J
  c. 10  105 J
  b. 20  105 J
  d. 5.0  105 J


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

mochi09

  • Sr. Member
  • ****
  • Posts: 335
Reply #1 on: Jul 28, 2018
Answer to Question 1

D

Answer to Question 2

A


ec501234

  • Member
  • Posts: 573
Reply 2 on: Jul 28, 2018
Great answer, keep it coming :)

brbarasa

  • Member
  • Posts: 308
Reply 3 on: Yesterday
Gracias!

« previous next »
 

Did you know?

Earwax has antimicrobial properties that reduce the viability of bacteria and fungus in the human ear.

Did you know?

Tobacco depletes the body of vitamins A, C, and E, which can result in any of the following: dry hair, dry skin, dry eyes, poor growth, night blindness, abscesses, insomnia, fatigue, reproductive system problems, sinusitis, pneumonia, frequent respiratory problems, skin disorders, weight loss, rickets, osteomalacia, nervousness, muscle spasms, leg cramps, extremity numbness, bone malformations, decayed teeth, difficulty in walking, irritability, restlessness, profuse sweating, increased uric acid (gout), joint damage, damaged red blood cells, destruction of nerves, infertility, miscarriage, and many types of cancer.

Did you know?

More than one-third of adult Americans are obese. Diseases that kill the largest number of people annually, such as heart disease, cancer, diabetes, stroke, and hypertension, can be attributed to diet.

Did you know?

All adverse reactions are commonly charted in red ink in the patient's record and usually are noted on the front of the chart. Failure to follow correct documentation procedures may result in malpractice lawsuits.

Did you know?

The first oral chemotherapy drug for colon cancer was approved by FDA in 2001.

An analogy for how cardiac output, resistance, and blood pressure are related. An analogy for how cardiac output, resistance, and blood pressure are related.
Does this child have legs of different lengths or scoliosis? Look at the level of the iliac crests a Does this child have legs of different lengths or scoliosis? Look at the level of the iliac crests a
Acquired resistance. Acquired resistance.
A typical pedestal grinder with a wire wheel on the left side and a stone wheel on the right side. ... A typical pedestal grinder with a wire wheel on the left side and a stone wheel on the right side. ...
A ring link network reduces the number of wires it takes to interconnect all of the modules. A ring link network reduces the number of wires it takes to interconnect all of the modules.
An aluminum wire has a length of 27.0 m and a resistance of 2.90 n at 20.00C. As An aluminum wire has a length of 27.0 m and a resistance of 2.90 n at 20.00C. As
Video: Sickle Cell Anemia

For a complete list of videos, visit our video library