« previous next »

Author Question: Wire A and Wire B are each carrying the same current. If the diameter of Wire A is half that of Wire ... (Read 402 times)

krzymel

  • Hero Member
  • *****
  • Posts: 548
on: Jul 28, 2018
Wire A and Wire B are each carrying the same current. If the diameter of Wire A is half that of Wire B, how does the drift velocity vdA in Wire A compare to that in Wire B?
 a. vdA = 4 vdB
  c. vdA = vdB /2
  b. vdA = 2 vdB
  d. vdA = vdB /4

Question 2

A solid cylinder (I = MR2/2) has a string wrapped around it many times. When I release the cylinder, holding on to the string, the cylinder falls and spins as the string unwinds. What is the downward acceleration of the cylinder as it falls?
 a. 0
  c. 6.5 m/s2
  b. 4.9 m/s2
  d. 9.8 m/s2


adammoses97

  • Sr. Member
  • ****
  • Posts: 337
Reply #1 on: Jul 28, 2018
Answer to Question 1

A

Answer to Question 2

C


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

It is difficult to obtain enough calcium without consuming milk or other dairy foods.

Did you know?

As many as 28% of hospitalized patients requiring mechanical ventilators to help them breathe (for more than 48 hours) will develop ventilator-associated pneumonia. Current therapy involves intravenous antibiotics, but new antibiotics that can be inhaled (and more directly treat the infection) are being developed.

Did you know?

Every flu season is different, and even healthy people can get extremely sick from the flu, as well as spread it to others. The flu season can begin as early as October and last as late as May. Every person over six months of age should get an annual flu vaccine. The vaccine cannot cause you to get influenza, but in some seasons, may not be completely able to prevent you from acquiring influenza due to changes in causative viruses. The viruses in the flu shot are killed—there is no way they can give you the flu. Minor side effects include soreness, redness, or swelling where the shot was given. It is possible to develop a slight fever, and body aches, but these are simply signs that the body is responding to the vaccine and making itself ready to fight off the influenza virus should you come in contact with it.

Did you know?

After a vasectomy, it takes about 12 ejaculations to clear out sperm that were already beyond the blocked area.

Did you know?

Women are two-thirds more likely than men to develop irritable bowel syndrome. This may be attributable to hormonal changes related to their menstrual cycles.

Male Turkmen in the wealthier half of the population had higher fertility rates than those in the po Male Turkmen in the wealthier half of the population had higher fertility rates than those in the po
A spark tester connected to a spark plug wire or coil output. A typical spark tester will fire only ... A spark tester connected to a spark plug wire or coil output. A typical spark tester will fire only ...
A current-carrying wire is placed in a uniform magnetic field, as shown below. A current-carrying wire is placed in a uniform magnetic field, as shown below.
A wheel of diameter 0.70 m rolls on the floor without slipping. A point at the top of the wheel ... A wheel of diameter 0.70 m rolls on the floor without slipping. A point at the top of the wheel ...
An electrochemical cell is based on these two half-reactions An electrochemical cell is based on these two half-reactions
James Watson and Francis Crick’s metal-and wire model of DNA James Watson and Francis Crick’s metal-and wire model of DNA
Video: Phases of an Action Potential - Resting Potential, Threshold, Rising, Falling, & Recovery Phases

For a complete list of videos, visit our video library