berkeman
You are right, sorry i will try to let students to find the answers, in this case i just, show the answers so he can easly track the problem, in think that in circuits the most important thing is not the formula but the drawing
In order to get the total current convert the circuit to an serial equivalent
1/(1/4o +1/8o) =2.66o ; here i break the first parallel
6o+2.66o = 8.66 ; here i merge two resitor in serial
1/(1/8.66o +1/10o) = 4.6o ; here i break the remaining parallel
now i got a...
but the second train running at 20m/s will only need 200 mts to brake, so it would be like 20 seconds , mean while the other train will need 36 seconds to get to the fatal 600mts, so the people of one of the trains has at least 16 seconds to leave!
V1^2 + 2aX1 = 0 (VF)
V2^2 + 2aX2 = 0 (VF)
THEN
V1^2 + 2aX1 =V2^2 + 2aX2
LETS SAY
X1=860MTS-X2
V1^2 + 2a(860-X2) =V2^2 + 2aX2 DOING THE MATH WE HAVE
(V1^2 - V2^2 )/4a + 430 = X2
V1=20m/s
V2=37m/s
remeber the a must be minus
then we have X2=671.25mts and X1...
planck time ATB
in the 10E-35 seconds ATB , the strong, the weak and the electromagnetic forces were all one big united force so, that confirm that the physics laws were different.
anyway if we see this definition of time :
The second is the duration of 9 192 631 770 periods of the...
Water of the Heavens
check this link
this meteorite falls over texas, and people from NASA found water on it
http://www.space.com/scienceastronomy/astronomy/meteorite_water.html
Celestial mechanics
Newton's universal law of gravitation is:
F :: Force between two bodies. (in Newtons)
M :: Mass of larger body
m :: Mass of smaller body
r :: Distance beween centers of mass of two bodies
G :: 6.674 e-11 N*m2*kg -2
F =
GMm / r2
Kepler's three...
specific heat capacity
i think that the keyword of your question is specific heat capacity, when you apply heat to different materials you will get a different result, because the molecular structure of each one will allow the movement of the mols with a different freedom.
Substances with...
How we can face the speed of the molecules on the gas kinetics theory and the speed barrier of light ?
because v=sqrt(3kT/m)
were k is boltzman
T = kelvin
and m = mass of the element
remember the huge T of the big bang