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...
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...
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.
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...
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!!!!
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...
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...
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?
Oops! so (.1450)(4.186)(5.2) +(.070)(.385)(5.2) +(m)(.44)(-74.8) which gives me 3.296384=32.912m which gives the mass to be .100kg this makes more sense thanks!!
Ok so I've got (.1450)(4.186)(5.2) +(.070)(.85)(5.2) +(m)(.44)(-74.8)Which gives me 8.8194=2.912m and m=.255kg
So the iron cylinder is going to have more mass than the water and the calorimeter????
How much ice could be melted by 320. grams of water at 68.0 degrees C?
Would I us mL + mcT=0 for the equation, and do the latent heat of ice for the first part and water for the second?
How many times more energy is emitted from a black body at 550. degrees C than at a room temperature of 22.0 degrees C.
So I know that a double in temperature increases energy by 2^4=16 so would I just do 25^4=390625 for this problem?
A 215.m steel bridge has an expansion joint of 18.0cm at one end at -15.0 degrees C. At what temperature would the joint be closed?
I would use the equation Change in L=L(alpha)T
But would the L equal zero since the joint is closed?
An iron cylinder is heated to 100.degrees C in boiling water ant then transferred to 145.0 grams of water in a 70.0 gram copper calorimeter at 20.0 degrees C. If the final temperature is 25.2 degrees C find the mass of iron used.
Would I use mL(Boiling water)+mcT(water)+mcT(coper...
Ok so what I've got is 3.35kcal=3350cal=3350cal*1J/.289cal=14022.604J
Then U=14022.604J-90J=13092.604J and this is my change in internal energy.
Is this correct
Calculate the ideal (Carnot) efficiency of a heat engine operating between 23.0 degrees and 515 degrees. How much heat would be rejected by the engine if 1.00 x 10^6 calories were taken from the high temperature resivoir.
Would you just use e=1-(T(c)/T(H))?
And for the second part i don't...
I wasn't sure if Q=3.35Kcal. Does it equal only that? And I don't even know what the answer is supposed to be, its just usually all our problems are more difficult that i didn't know if there was something else to it.