Log in
Physics
1
answer
0
watching
53
views
23 Nov 2019

You are asked to calculate the volume of a cylindrical rod of copper. You have used calipers to measure the dimensions of the rod, and have assigned an error to each measurement. You measured the length of the rod to be 0.4 ± 0.2 cm and the radius of the rod to be 8.5 ± 1.4 cm. What is the error in your calculated volume?

Watch
1
answer
0
watching
53
views

For unlimited access to Homework Help, a Homework+ subscription is required.

Irving Heathcote
Irving HeathcoteLv2
6 Jun 2019

Unlock all answers

Get 1 free homework help answer.
Already have an account? Log in
Share

Related textbook solutions

Physics: Principles with Applications
7th Edition, 2013
Giancoli
ISBN: 9780321625922

Related questions

I NEED THIS ANSWERED BEFORE MIDNIGHT PST! I WILL RATELIFESAVER!

A very thin glass rod 4 meters long is rubbed all over with a silkcloth. It gains a uniformly distributed charge 1.6X10^–6 C. Twosmall spherical rubber balloons of radius 1.2 cm are rubbed allover with wool. They each gain a uniformly distributed charge of-8X10^–8 C. The balloons are near the midpoint of the glass rod,with their centers 3 cm from the rod. The balloons are 2 cm apart(4.4 cm between centers).




(a) Find the net electric field at the location marked by the X,0.6 cm to the right of the center of the left balloon. Things tothink about: Which objects make nonzero contributions to E field atthis location? What are the correct distances from sources to theobservation location? What is the direction of E field due to therod? (The drawing is not to scale; read the problem statementcarefully. Assume the +x axis is to the right, the +y axis is up,and the +z axis is out.)

E = ________ N/C

(b) What approximations did you make, if any? Which apply(1-4)?
1. Neglect polarization of balloons.
2. Use approximate formula for electric field of a chargedspherical shell.
3. Neglect polarization of rod.
4. Assume distance to observation location is small compared tolength of rod.

(c) Next a proton is placed at that same location (marked by thex). What is the force acting on the proton?

F = ________ N
Note: in parts (a) and (c) there should be an arrow over the"E" and the "F" but the custom equation function would not workproperly.

You have three parallel conducting rods. Two of them are verylong,and the third is 10.0 m long, with a weight of 36.0 N. Youwish toconduct the following levitation demonstration: The two longrodswill be placed in a fixed horizontal orientation at thesameheight, 10.0 cm apart. The third rod is to float above andmidwaybetween them, 10.0 cm from each one (from an end view, thethreerods will form the vertices of an equilateral triangle). Youwillarrange to pass the same current I through all three rods, inthesame direction through the two "supporting" rods and intheopposite direction through the "levitating" rod. What isthemagnitude I of the current that will maintain thisastoundingconfiguration?


I am trouble trying to figure out how to approach thisproblem.I know that Force = (mu*Current1*Current2*Length) /2*pi*R,

and Im supposed toequal the weight of the 3rd rod to magnitudeof the two bottom rodsto achieve the "levitating" concept, but Idon't know how to putthis into math terms. Please Help!!!

A quantity is measured 100 times, and, after calculating themean, thestandard deviation, and the standard error on the mean,and assuming the errors on the individual measurements are allrandom, you come to the conclusion that your best value, andstandard error on the mean, are X = 21.0 +/- 0.4

This is fine, but you’d really like to have a final accuracy of0.1 cm. So you take more measurements. Assuming that in the secondbunch of measurements, any given measurement has about as muchrandom error as any given measurement in your original 100measurements, how many measurements should you make, in total, sothat the standard error on the average of all your measurements is0.1 cm

Weekly leaderboard

Home
Homework Help 3,900,000
Physics 110,000
Start filling in the gaps now
Log in