Answer:
The answer is probably D.
Explanation:
It's clearly not A and B. So, It all "boils" down to option C and D. Black surface absorbs the most heat, but also gives it out easily (Kirchoff's law of radiation). Now a metal cup with a glossy surface is going or reflect some of the light that strikes it. But a matte black surface helps it absorb the heat even though it can emit that heat fast.
Answer:
Explanation:
Check attachment for solution
if it is heat flow through a metal, it would be necessary to have a conductor so that the electrons can flow through it (delocalised electrons).
In terms of radiation, it would require a good absorber of heat (e.g. a black surface) so that the thermal energy flows through on the surface area.
First, let us assign the variables
y = 0.90 m, x= 15 m,
= 2.80 m
s= required
The vertical component of the trajectory is in uniformly accelerated motion. The equation is:
, while the horizontal component is
. Also,
since the object starts from rest (with respect to the downward motion). a is negative because it is moving downwards (a = -9.81 m/s^2). Substituting,
The magnitude of v0, which is speed (s), is equal to 24.1 m/s