Answer:
Explanation:
For resistance the formula is as follows
R = ρ L/S
where L is length of the wire , ρ is a constant for a specific material called specific resistance and S is cross sectional area .
For 0.6 m wire , putting the values
.13 = ρ x 0.6 / S
For unknown wire
R = ρ x 187 / S
Dividing the two equations
R / .13 = 187 / .6
R = (.13 x 187) / .6
= 40.5 ohms .
Answer:
B) 4500 Pa
Explanation:
As pressure is force per unit area,
P = F/A
It stands to reason that the smallest pressure for a given force is when it is shared by the largest area.
The possible areas are
0.30(0.40) = 0.12 m²
0.30(0.50) = 0.15 m²
0.40(0.50) = 0.20 m²
The pressure when the face with the largest area (0.20 m²) is down is
P = 900 / 0.20 = 4500 N/m² or 4500 Pa
the other possible pressures would be
900/0.15 = 6000 Pa
900/0.12 = 7500 Pa
which are both larger than our solution.
Lumbar nerves transmit signals that allow us to walk. They are a pivotal part of the human body, and without them we would be immobile. Hope this helps.
Explanation:
After the shock of seeing animals falling from the sky and silence, comes what you may have already imagined; that is, we would die from lack of oxygen - and in about 3 minutes. The worst thing is that not even patients connected to respirators in hospitals or divers equipped with cylinders could survive, since there is a need for pressure to be able to breathe.
