Electricity. Ruler. 69. N.
Answer: Example 1: Consider a crate being pulled along a frictionless floor (while such a floor is very hard to find, this will still help us understand the concept and we can return to this situation later, after considering friction, and solve it more realistically).
Consider a crate being pulled along a horizontal, frictionless floor. A rope is tied around it and a man pulls on the rope with a force of T. T is the tension in the rope. What happens to the crate?
Before we can apply Newton's Second Law,
F = m a
we must find the net force -- the vector sum of all the forces -- acting on the object. In addition to the force T exerted by the rope, what other forces act on the object?
As discussed in class, in Mechanics, we can restrict our attention to "contact" forces and "gravity". That means gravity pulls down on this crate with a force equal to its weight, w. But the floor supports the crate. The floor responds by pushing up on the crate with a force we call the normal force. "Normal" means "perpendicular". We will call this force n; you may also encounter it labeled N or FN.
Explanation:
<span>good observations ensure accurate data and valid
conclusions.</span>
Answer:
a
b
Explanation:
From the question we are told that
The number of identical drippers is n = 60
The diameter of each hole in each dripper is 
The diameter of the main pipe is 
The speed at which the water is flowing is 
Generally the amount of water used in one hour = 3600 seconds is mathematically represented as
Here A is the area of the main pipe with value
=> 
=> 
So
=> 
=>
Generally the area of the drippers is mathematically represented as
=> 
=> 
Generally from continuity equation we have that
=> 
=>
