I have just been to the doctors and had my blood pressure taken. My blood pressure was 106 over 66 and the time before it was 98 over 72. The doctor said it was low, but what exactly does low blood pressure mean? and why does it keep changing?
Also how many times is your heart suppose to beat...
So all waves can behave like particles and all particles can behave like waves. Given whatever situation there in determines what they'll behave as. Is that right?
Or is it only certain waves/particles that do it? or does there have to be certain condition i.e high velocity? Its so confusing...
we have just started to learn a new chapter in my physics class about de broglies hypothesis. In my textbook it shows a diagram of a line of electrons being fired at a constant speed, hitting a sheet of thin metal foil and then diffracting.
The explanation in my book says
' A narrow beam of...
I was just wondering which university, in england, would you say is the best for a physics degree. I was hoping to go to manchester, but they've put up their entry requirements too high, so I am thinking probably birmingham. Are there any other unis that you would suggest?
why do you differentiate twice?
In some of the questions in my homework, we have been asked to differentiate an equation twice. I understand that when you differentiate once, you are finding the gradient. When you intergrate, your finding the area. However what is the reason for differentiating...
hi there
im currently in my first year of alevels, I am doing maths, physics and chemistry. They are quite difficult alevels to do. But as long as you don't do what i did at the start of AS, which was not really paying attention, then its not to bad. So as long as you go to all your classes, do...
i recently saw in my physics textbook a diagram of a positron and a electron being created in pair production. The diagram showed that as soon they where created, they moved in opposite directions and then they spiralled inwards a bit. Now i think the reason why they move in opposite directions...
Homework Statement
An alternating current source is connected to a resistor to form a complete circuit. The oscilloscope settings are: Y sensitivity 4.0v per division
Time base 1.0ms per division
(i)determine peak voltage of the a.c source
(ii)Hence...
Why on a oscilloscope does a.c current have a sine wave, whereas a d.c current is just a straight line. I've tried to look it up, but the explanations on the internet are a bit to complex for me to understand as i am only in my first year of alevel. If anyone could explain this to me, as simply...