# Recent content by lilkrazyrae

1. ### Draw a ray diagram

A converging lens has a focal length of 25cm. A 1.00cm tall object is placed 15.0cm in front of the lens. Find the image location and size, and describe it. Draw a ray diagram. Ok so I get 1/p + 1/q = 1/f rearranged for q=pf/p-f which equals -37.5, so the object is 37.5cm behind the lens. and...
2. ### Converging lens

A converging lens has a focal length of 25cm. A 1.00cm tall object is placed 15.0cm in front of the lens. Find the image location and size, and describe it. Draw a ray diagram. Ok so I get 1/p + 1/q = 1/f rearranged for q=pf/p-f which equals -37.5, so the object is 37.5cm behind the...
3. ### How do you find the angle of polarization? What is the formula?

Thanks that helps!!!
4. ### How do you find the angle of polarization? What is the formula?

ok the question reads exactly like this Find the angle of polarization and the corresponding angle of refraction for ethyl alcohol. That is all it says.
5. ### Fraction Of The Intensity Incident

Just want to know if anyone has an idea if this is correct?
6. ### How do you find the angle of polarization? What is the formula?

the angle of polarization of ethyl alcohol.
7. ### How do you find the angle of polarization? What is the formula?

How do you find the angle of polarization? What is the formula? Its not in my physics book and I looked online and couldn't find it.
8. ### Fraction Of The Intensity Incident

Two Polaroid filters are initially crossed. The analyzer is rotated through an angle of 55.0 degrees. Find the fraction of the intensity incident on the polarizer which passes the analyzer. I used I1=1/2 Io I2= I1cos I2= 1/2 Io cos^2(theta) = 1/2 Io cos227.5° = .393 Io Is...
9. ### Calculate power produced in each bulb

Even though it says to ignore the series connection?
10. ### Calculate power produced in each bulb

Not Wanting you to do it for me Actually I was reviewing for a test and working the odd problems. I was checking to see if I did them right. You guys always seem to assume the worst!!!!
11. ### Calculate power produced in each bulb

Given two light bulbs with the following ratings: 75.0W 120VAC and 100W 120VAC. They are connected in series across a potential difference of 120. VAC. Assuming that the operating resistances of the bulbs are not affectd by the series connection, calculate (a) the power produced in each bulb...
12. ### Use galvanometer

A galvanometer of 90 ohms internal resistance has a full-scale current of 350. microA. Describe how to use this meter to make : (a) a 150 V voltmeter, and (b) a 10.0A ammeter So (a) Resistors must be connected in series with the galvanometer, R=4.29 x 10^5 ohms. (b) A shunt resistor must...
13. ### Repulsive force

Find the repulsive force on two protons in the nucleus of an atom assuming they are separated by the minimum distance of 1.00 x 10^-15m. So F=k lq(1)l^2/ r^2 =8.99 x 10^9 (1.602 x 10 ^-19)^2/(1.00 x 10^15m) =230.7N Is this correct?
14. ### Calculate the ideal (Carnot) efficiency of a heat engine

No Body knows?!?
15. ### Black body

Ok that makes more sense!! And the problem reads just as I wrote it.