Answer: 21965.517 Pa
Explanation:
Pressure is the force exerted by a gas, a liquid or a solid on a surface (or area) , its unit is Pascal which is equal to and its formula is:
(1)
In this case we have the surface of a sole of a tennis shoe:
(2)
And the mass of the person who wears it:
On the other hand, we know the weight is the force the Earth exerts on people and objects due gravity :
(3)
Substituting (2) and (3) in (1):
(4)
Finally:
This is the pressure the shoe exert on the ground
Answer:
The first trophic level of the food chain has the most energy.
To solve this problem we will apply the concepts related to the intensity included as the power transferred per unit area, where the area is the perpendicular plane in the direction of energy propagation.
Since the propagation occurs in an area of spherical figure we will have to
Replacing with the given power of the Bulb of 100W and the radius of 2.5m we have that
The relation between intensity I and
Here,
= Permeability constant
c = Speed of light
Rearranging for the Maximum Energy and substituting we have then,
Finally the maximum magnetic field is given as the change in the Energy per light speed, that is,
Therefore the maximum value of the magnetic field is
Answer:
Given that
speed u=4*10^6 m/s
electric field E=4*10^3 N/c
distance b/w the plates d=2 cm
basing on the concept of the electrostatices
now we find the acceleration b/w the plates to find the horizontal distance traveled by the electron when it hits the plate.
acceleration a=qE/m== m/s
now we find the horizontal distance traveled by electrons hit the plates
horizontal distance
=
== 3 cm