Physics

Physics problem with stefan boltzman constant

a car parked in sun absorbs energy at rate of 590 watts per square meter of surface area. the car reaches a temperature at which it radiates energy at the same rate. treating the car as a non perfect

Which physicists are the best writer of physics for the "average people

My top three choices are:1. Brian Greene, 2. Michio Kaku, 3. Leonard Susskind Agree?-I have the book by Tsiolkovsky but in Russian only.If there is translation it is very good.Perelman is just for av

How many elementary particles have been discovered

I know there are 36 different types of quarks, Eight Yang-Mills field to describe gluons, four Yang-Mills filed to describe the weak and electromagnetic forces, six types of leptons to describe the we

What waveform and frequency will drive a flyback transformer most efficiently

hey, what waveform is used to drive a flyback transformer, what frequency and what voltage, and at that voltage what current would it draw? because i have made a flyback transformer driver with a 5

A simple conservation of energy problem, with rotation (bowling ball).

http://www.flickr.com/photos/53399890@N05/5660517090/in/photostream I already did parts a and b. I have questions about parts c -e. I need to make sure Im interpreting these parts correctly. For par

Hi, Is there a way to calculate my mass.

Hi,I weight 55kg at sea level. I know gravity pulls on a 1kg mass with a force of 9.8 Newtons. But I cant figure out how to work out my mass? As a side issue. If some was to shove me sideways. wo

Easy Current electricty problem, 10 points, waiting for answers.. Thanks..

I stuck into this problem, plz help, Circuit is http://picturepush.com/public/5541688 Find charges on 3uF and 6uF capacitors. Thanks in advance-After a long time, i.e, when steady state is reached,

A piece of chalk when immersed in water emits bubbles. Why

Chalk consists of pores forming capillaries. When it is immersed in water, the water begins to rise in the capillaries and air present there is expelled in the form of bubbles.-Chalk is made from Calc

Physics - electric field strength

A charge, q1 = 5.00uC, is at the origin, and a second charge, q2 = -3.00uC, is on the x-axis 0.800 m from the origin. Find the electric field at a point on the y-axis 0.500 m from the origin. How do

10 points, Easy Capacitors problem, please help

I stuck into this problem, plz help, Circuit is http://picturepush.com/public/5541688 Find charges on 3uF and 6uF capacitors. Thanks in advance.-1st, 3V on the 3uF and 6V on the 6uF. A Farad (F) is

Why has the Bloom Box not exploded in popularity yet

A couple years ago, you couldnt go to a single tech site w/o reading about the Bloom Box. But, what happened to them? They seem to have been swept under the rug.-There are serious problems with the B

Physics question about a converging lens...please help!

An object is placed 5.50 cm in front of a converging lens with a focal length equal to 5.00 cm. a.)What is the position of the image? b.) Is the image real or virtual? c.) Is the image upright or inve

How is the energy of a wave related to its amplitude

A) As energy decreases, the amplitude decreases B) As energy increases, the amplitude decreases C) As energy increases, the amplitude increases D) Energy does not affect amplitude-c

Two circular pipes A & Bboth containing water but at different pressures. They are connected by the means of a

Two circular pipes A & Bboth containing water but at different pressures. They are connected by the means of an inverted U-tube, which contains oil with the density of 800kg/m^3. The heights are Ha=7,

Properties/functions of heat

hi! anybody know proper functions of heat? I know it makes metals expands, changes matter (ice into water), but I cant think of any more. any ideas? thanks :D-Four stipulations for the definition of h