Answer:
science is define as the study of physics, chemistry, biology, geology and astronomy. science is very important in our daily life.we study science for knowing the knowledge about biological and chemical and many other aspects.without science it is impossible to live our daily life.science is used in each and every steps.
Explanation:
There are many more benefits that we are getting and going to get . Science has already discovered many things ,that we didn't expect efore.And also in progress to discover new things.Science has developed a new type of antivirus that protect us from different virus.Has made different medicine that recover a people. So it is very useful in our life.
Gravitational energy is the potential energy associated with gravitational force. If an object falls from one point to another inside a gravitational field, the force of gravity will do positive work on the object and the gravitational potential.
Found this on cha-cha.com
it is known as the
nuclear meltdown
Answer:
1 / 2
Explanation:
This problem is a 1 - D steady state heat conduction with only one independent variable (x).
1 - D steady state:
Q = dT / Rc
Q = heat flow
dT = change in temperature between a pair of node
Rc = thermal resistance
Rc = L / k*A
Since in both cases Rod A and Rod B have identical boundary conditions:
dT_a = dT_b
So,
R_a = L / k*(pi*r^2)
R_b = 2L / k*(pi*(2r)^2) = L / k*(2*pi*r^2)
Compute Q_a and Q_b:
Q_a = k * dT *(pi * r^2 * / L)
Q_a = k * dT*(2*pi * r^2 * / L)
Ratio of Q_a to Q_b
Q_a / Q_b = [k * dT *(pi * r^2 * / L)] / [k * dT*(2*pi * r^2 * / L)] = 1 / 2
