We don't know anything about the structure or materials of the real transformer, so all we can do is assume that it's ideal, with no losses.
1). <em>N1/N2 =</em> 120v/12v = <em>10:1</em>
2). <em>I =</em> V/R = 12/4.7 = <em>2.55 Amperes</em>
3). <em>Power =</em> V²/R = (12)² / 4.7 = <em>30.64 watts</em>
4). Power = V² / R
R = V² / power
R = (120)² / (30.64 watts)
<em>R = 470 ohms </em>
Galaxies are red shifted and in 1964 to scientists discovered leftover Radiation from the Big Bang
<h3>
Answer: D) 30</h3>
Angle of incidence always equals angle of reflection. Think of a tennis ball being hit into a wall. The ball will bounce off at the same angle that it approached with. The angles mentioned are formed through the line called the "normal", which is the line perpendicular to the surface.
Answer: (A) At terminal velocity ...
Explanation:
<h3><u>Answer;</u></h3>
12.5 Newtons
<h3><u>Explanation;</u></h3>
Work done is defined as the product of force and distance covered or moved. It is measured in joules.
Work done = Force × distance
Therefore; making force the subject;
Force = work done/distance
= 50.0 J/ 4.00 m
=<u> 12.5 Newtons.</u>
