Fist one is a cylinder
the second, i believe is a sphere
the third is a rectangular prism
and the last is the same as the first, a cylinder
The appropriate term is latent heat. This energy is released as the water changes state from a gas to liquid....a liquid to solid etc. the latent heat is either absorbed or given off by the water as it changes its physical state. Latent heat of fusion is associated with freezing a liquid or melting a solid.
The apple in my hand has three different forms of energy
that I can think of.
1). Thermal energy. I know that the apple's temperature is
not absolute zero, because it is not freezing my hand off.
Therefore it holds some heat energy.
2). Chemical energy. From previous experience, I know that
if I eat the apple, it gives me a boost and keeps the doctor away,
since my body is able to metabolize it, and extract nutrition from
its chemical energy.
3). Potential energy. Also from previous experience, I realize
that when I picked up the apple, I exerted force on it opposite to
the force of gravity. By doing work on it, I endowed it with increased
gravitational potential energy, which would immediately be obvious
if I dropped it to the ground, where it would either smash or dig a
little crater in the grass.
<span>the reason I use the moments is for a problem to be in static equilibrium the moments about any point is zero
the reason I take the moments about where the rod touches the wall is the unknown horizontal force and force of friction are produce zero moments at that point
the only contributing forces are the tension in the guy wire and the weight acting down
the weight can be considered a point acting at a distance 3 meters from the wall along the rod since the sigh is attached to the rod
why i used y' is to reduce variables; the moment is the same
y' * T = y T(vertical); just wanted to find total T in one step
sum M about O = 0 = W*3m - T(y')
solve for T
then use Net Force X = 0 therefore R(horizontal) = T(horizontal)
use Net Force Y = R(vertical) + T(vertical) - W = 0
the reaction horizontal is where the rod meets the wall and is the normal force or from a materials point of veiw where the rod is being compressed into the wall
the reaction vertical is the force of friction along the end of the rod on the wall
you need on final formula force of friction = µ * normal force( which is R(horizontal))</span>