I am having difficulty understanding the information below. In the second line it states that F=0 as there is no external force on the system. However it later calculates acceleration of the rocket.
How can Force=0 if there is acceleration? (This is the first time I have encountered the...
I am having trouble understanding this derivation and need some guidance.
1) I tried solving the algebra from the first equation to the second equation circled in red. Can someone please help with what algebra steps, I cannot solve to the circled solution.
2) What does Ee stand for? Is it...
What benefit does a v-shape magnetic accelerator (image 1) have over a linear magnetic accelerator (image 2)?
Image 1: v-shape
Image 2: linear
The v-shape magnetic accelerator appears to increase the ball's average speed with a larger angle. What is the physics behind this?
Okay I think I've got it!
So energy of alpha particle 2(1.0073x931.55)+2(1.0087x931.55)=3756MeV
Total energy = 88x(1.0073x931.55)=138(1.0087x931.55)=212247Mev
Ratio total energy:alpha particle = 212247/3756=56
So the alpha particle makes up 1/56th of the total energy.
Why do we only think...
Ah yes that make sense I can see now the numbers are actually for V, the way they've written out the equation has confused me.
However I am still arriving at the final answer P=2P. I must be making a mistake in my algebra. I will post my working in a moment
Question:
Answer:
In the third last line of working, I do not understand why the pressure variable is changing? Shouldn't pressure remain constant and only the Volume change?
The solution is :
The pressure inside the solid is zero and outside it equals atmospheric pressure, 1.01 × 10^5 Pa.
Thus, the force is given by: F =pA = 1.01 × 10^5 × (0.25)^2 = 6.3 × 10^3 N
I do not understand why only the area of one cube is used in the solution, should it not be the area...
Hi,
The solution for this question is
thermal energy lost= thermal energy gained
0.200x450x(300-T)=1.0x4200x(T-20)
T=26 degrees celcius.
However, I am struggling to grasp why (300-T) is used.
I have always known a change in something to be final - initial. Therefore change in T= Final-...