If the angle of reflection is the same as the critical angle then through a prism, most of the light will go along the straight edge and a little will be refraceted out with a little tir.
GPE and KE...please help! argh
Hi I am just finishing my AS physics coursework and just as i thought i understood it someone tells me something else. When you pick up an object i understand that it gains GPE and the amount of this depends on the height it is picked up to, hence GPE = mgh. But...
Hi I got given these 2 planning q's to do by my teacher but I don't have a clue how to do the actual experiment. If i knew that much then I would b able to write about it. Could n e 1 help me please
Plan an experiment that would enable you to measure the molar enthalpy change of the reaction...
Yup
Yeah i tried this and that's where i got the 3.33blah blah blah... answer. I used 2W = 2joules per second and therefore if its one second it 2 joules, i put this in E=hf and it came out wrong as that's not the answer in my textbook. Dont say why can't i just copy it because the teacher...
Here are two questions I am stuck on:
1. How many visible photons are produced per second from a 2Watt lamp? It says the range of the wavelengths is near 5x10^-7m. I tried this and got 3.33x10^33Hz but apparently that's wrong so please help me.
2. A photon of frequency 6x10^14Hz explores a...
Hi this is an AS physics question that i am stuck on. I tried it but I don't get the answer it says in the answers.
A girl diving froma 15m plstform wishes to know how fast she enters the water. She is in the air for 1.75s and dives from rest(with an initial speed of zero). What can you...
I have this question to do for homework and i can't find the answer anywhere so please can someone help me. Barium hydroxide can sometimes be used instead of limewater to detect small quantities of CO2. Why is Barium hydroxide preferred here and in using it instead of sodium hydroxide for...
Hi please help I have to do a piece of coursework on sensors. I am testing a thermistor and my teacher mentioned something about calibration but I don't know what it is can someone help please. I have taken results for the resistances for every ten degrees from 0 to 150
Hi please help I have to do a piece of coursework on sensors. I am testing a thermistor and my teacher mentioned something about calibration but I don't know what it is can someone help please. I have taken results for the resistances for every ten degrees from 0 to 150
Hi I am a physics AS student who has to do a piece of coursework and give a presentation on a material. I have chosen to do chocolate and confectionery and I am wondering if any of you knew why toffee is so chewy and sticky? Also if you knew what the mechanical properties of chocolate or toffee...