Answer:
As the sun warms the land, the air above the land warms too. The warmer, lighter air rises, and the cooler heavier air above the water moves in and replace the rising warm air
Explanation:
In convection current, during a hot sunny day, the land is heated up and the air above the land becomes warm and rises upward because of their low density. The cool breeze from the sea with higher density moves downward to replace the risen warm air. This process is known sea breeze which happens in the day time.
Based on the given options, we can choose the first option.
"As the sun warms the land, the air above the land warms too. The warmer, lighter air rises, and the cooler heavier air above the water moves in and replace the rising warm air".
Answer:x=2 and x=3
Explanation:
Given
Potential Energy for a certain mass is
and we know force is given by
For Force to be zero F=0
Therefore at x=2 and x=3 Force on particle is zero.
Answer:
A. Aluminium
Explanation:
Buoyant force is simple terms refers to the weight of water displaced when an object is immersed in it. The higher the volume of an object, the higher the buoyant force.
From the problem, we have two metals of equal mass, aluminium and lead, of which lead is denser.
density =
Volume =
This means that the volume of each metal depends on the density, and for the fact that lead is denser , it will have a lower volume than aluminium which means Aluminium will have a greater buoyant force.
Since
<span>Vf^2 = 2*a*S </span>
<span>Given S=3.6m, thus </span>
<span>a = Vf^2/(2*3.6) </span>
<span>a = Vf^2/7.2 </span>
<span>Let d be the distance along the slope at which the velocity is 0.5Vf, then </span>
<span>(0.5Vf)^2 = 2*a*d </span>
<span>or </span>
<span>d = (0.5*Vf)^2/(2*a) </span>
<span>with a = Vf^2/7.2, we have </span>
<span>d = 0.9 m</span>
the fact that chemicals have different colors
