Answer:
1. The magnetic pole is the region at each end of a magnet where the external magnetic field is the strongest.
2. magnetic line of force - a line of force in a magnetic field. field line, line of force - an imaginary line in a field of force; direction of the line at any point in the direction of the force
Explanation:
Answer:
1.048 W
Explanation: Given that a lightbulb has an efficiency of 13.1%.How much light energy (not heat energy) is generated by the bulb every second if the bulb has a power pf 8W?
The input power = 8W
The output power = ?
The efficiency = 13.1%
Using the formula below:
Efficiency = (power output / power input) × 100
13.1 = (Power output / 8 ) × 100
0.131 = power output / 8
Cross multiply to make the power output the subject of formula
Power output = 0.131 × 8
Power output = 1.048 W
Therefore, the light energy (not heat energy) generated by the bulb every second is 1.048 W
“Once in a blue moon” is a common expression that has been used for a long time, and which means 'not very often,' or 'very rarely. ' It often refers to an extra full moon; however, it has been used to describe the way the moon actually looked, when for different reasons it had turned a blueish color.
www.loc.gov › astronomy › item
What
In order to solve this, we will use the formula
where n is the index of infraction, c is the speed of light (3x10^8), and v is the medium in which the velocity is measured
solving for n,
n = (3x10^8)/(2.75x10^8) = 1.09
<span>Speed of the wave = frequency * lambda. Where lambda is distance in meters
But frequency = 1/ T where T is the period in secs.
So Speed = lambda/ T
T = 2s and lambda = 10m
So Speed = 10/ 2 = 5 m/s</span>
