Cause it’s denser at the bottom
Answer:
(1) - (2)
and
(3) - (4)
Explanation:
Hi!
The Newton's third law states that for every action there's and equal and opposite reaction.
Lets us consider the first force:
<em>(1) the force of the horse pulling on the cart</em>
Therefore, its counterpart, will be a force of the cart pulling on the horse, which is actually:
<em> (2) the force of the cart pulling on the horse</em>
<em />
Analogously, the third force:
<em>(3) the force of the horse pushing on the road</em>
and the fourth force:
<em>(4) the force of the road pushing on the horse </em>
<em />
From a action reaction pair, since the former force acts on the road by the horse, and the latter on the horse by the road
Answer:
m=1000kg
v=72km/h=20m/s
Work = different of kinetic energy
W= ½ mv ²
W= ½ ×1000×20×20= 400000J
also written as 4×10^5 J
thank you
Particles in the liquid state of matter are close together, yet free to move around one another
Answer:
You will need 450 cells (3 cm each) to meet the voltage/current requirement.
The panel must be 3 cells in one side, by 150 cell in another side. 1350 cm^2 or 0.135 m^2. They must be connected 3 in row in parallel (to add current), then each of the former group must be connected in series to meet the voltage, so it would be 150 rows of connected in series.
The panel can be optimized using a voltage inverter, to convert current to voltage. In this way, less cells can be used achieving the same output specs.
Explanation:
To meet the voltage:
120 [v] required voltage
0.8 [v] voltage of each cell
![\frac{120}{0.8} =150[v]\\](https://tex.z-dn.net/?f=%5Cfrac%7B120%7D%7B0.8%7D%20%3D150%5Bv%5D%5C%5C)
So we need 150 cells in series for the voltage.
To meet the current
1.0 [A] Required current
350[mA]=0.35[A] cell current
1/0.35=3 cell So we need 3 cells in parallel to add the currents and meet the requirement.
See the attached figure