Answer:
a) P=974,028.25 Pascals
b) P=159,154,943.1 Pascals
Explanation:
<u>Pressure</u>
It's measured as the ratio of the force F applied perpendicular to a surface of area A. Its units are Pascal, PSI, atmospheres, bars, mm Hg, among many others.
a)
Our man has a weight of 765 Nw. When he lies on the bed of nails, his weigh will be (uniformly) distributed among them all. It there are 1000 nails, each one will take a force of
The flattened point on each nail has a radius of 0.500 mm = 0.0005 meters, we can compute its area as a circle
The pressure of each nail will be
Or equivalently
b)
We can similarly calculate the pressure exerted on the skin by an acupuncture needle of radius 0.100 mm (0.0001 m) applied with a force of 5 N
Or equivalently
Answer:
The block moves with a speed of 0.875 m/s just after the emergence of the bullet from the block.
Solution:
Mass of the bullet, m = 4.25 g = 0.00425 kg
Initial velocity of the bullet, u = 375 m/s
Mass of the wooden block, M = 1.20 kg
Initial velocity of the block, v = 0
Final velocity of the bullet, u' = 128 m/s
Now,
Let the final velocity of the block be v'.
Using the principle of conservation of the momentum:
mu + Mv = mu' + Mv'
v' = 0.875 m/s
Answer:
The sun rays will be focused at the same distance from the mirror.
Explanation:
Laws of reflection do not depend on the refractive index n any form. Hence, the sun’s rays will be focused the same distance from the mirror.
The accident at the nuclear power plant in Chernobyl in 1986 demonstrated about the use of nuclear power that had not been previously demonstrated is that t<span>he uranium fuel that is used is radioactive. </span>
The total resistance is 5.9.
The expected current is 1.
The current will be the lowest at point D.