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 41 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
YES! Correct, THANKS for helping me on my review

pratush dev

  • Member
  • Posts: 321
Reply 3 on: Yesterday
Wow, this really help

« previous next »
 

Did you know?

Immunoglobulin injections may give short-term protection against, or reduce severity of certain diseases. They help people who have an inherited problem making their own antibodies, or those who are having certain types of cancer treatments.

Did you know?

The Centers for Disease Control and Prevention (CDC) was originally known as the Communicable Disease Center, which was formed to fight malaria. It was originally headquartered in Atlanta, Georgia, since the Southern states faced the worst threat from malaria.

Did you know?

Signs and symptoms of a drug overdose include losing consciousness, fever or sweating, breathing problems, abnormal pulse, and changes in skin color.

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?

According to the Migraine Research Foundation, migraines are the third most prevalent illness in the world. Women are most affected (18%), followed by children of both sexes (10%), and men (6%).

Chuckwalla body lengths at the end of a laboratory rearing experiment Chuckwalla body lengths at the end of a laboratory rearing experiment
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.
Needle-nose pliers are used where there is limited access to a wire or pin that needs to be ... Needle-nose pliers are used where there is limited access to a wire or pin that needs to be ...
The focal lengths of the objective and the eyepiece in a microscope are 0.29 cm The focal lengths of the objective and the eyepiece in a microscope are 0.29 cm
What is the total resistance of the circuit in Figure 1? 150 What is the total resistance of the circuit in Figure 1? 150
Video: Autonomic Nervous System Animation

For a complete list of videos, visit our video library