Answer:
The correct answer is D Air molecules touch the warm ground, heating them up.
Explanation:
There are three types of thermal energy: Conduction, convection, and radiation. Conduction is the process in which energy (also known as heat) is transferred from one object to another by directly touching each other (solids touching solids). Convection is the process in which energy is circulated through the movement of fluids (like liquids or gases), by hot air rising and cool air sinking. Radiation is the process in which energy is transferred from one place to another by electromagnetic waves. An example of this would be feeling warm after being outside in the sun; such as choice B, which is hence incorrect. Choice A is a rephrasing of choice C; both of which are considered convection because air is not a solid, but a gas and this air is <em>rising </em>and<em> sinking</em>. This leaves us with choice D. Choice D would be considered conduction because the air molecules are <em>touching</em> the ground; therefore, being heated <em>directly</em>.
Hope this helps,
❤<em>A.W.E.</em><u><em>S.W.A.N.</em></u>❤
amount of time the two substances are in contact. area in contact between the two substances. specific heat of the material that makes up the substances. the density of the two substances in contact.
Answer:
not the same result
Explanation:
chemical change is a change in which atoms are rearranged
physical change is a change which results no new chemical substances being formed
Answer:
Convergent boundaries form when two crustal plates are colliding. ... The subducting plate is being recycled as it begins to melt at about 100 kilometers. The water soaked oceanic plate forms molten rock that collects in magma ... If the break is along hundreds of kilometers of fault line a megathrust earthquake occurs.
Explanation:
Answer:
156 g
Explanation:
Let's consider the following reaction.
2 NaN₃(s) → 2 Na(s) + 3 N₂
(g)
We can find the moles of N₂ using the ideal gas equation.
P × V = n × R × T
1.50 atm × 60.0 L = n × (0.08206 atm.L/mol.K) × 305 K
n = 3.60 mol
The molar ratio of N₂ to NaN₃ is 3:2. The moles of NaN₃ are:
3.60 mol N₂ × (2 mol NaN₃ / 3 mol N₂) = 2.40 mol NaN₃
The molar mass of NaN₃ is 65.01 g/mol. The mass of NaN₃ is:
2.40 mol × 65.01 g/mol = 156 g