Answer:
Definition of speed of light. : a fundamental physical constant that is the speed at which electromagnetic radiation propagates in a vacuum and that has a value fixed by international convention of 299,792,458 meters per second
Explanation:
Power=work/time
So,
Power =450/50=9watts
Answer:
0.079 m or 79 mm
Explanation:
Using the equation of motion
v = √(2as)
Where v is the velocity
a is acceleration = 1400m/s²
s is the distance = 0.55 mm = 0.00055m
Therefore
= √(2 × 1400m/s² × 0.00055 m) = 1.54 m/s
Therefore; initial velocity = 1.54 m/s
Then we use the equation of motion s = v² / 2g
Take g = 9.8 m/s²
Therefore
= (1.54m/s)² / 19.6 m/s²
= 0.079 m or 79 mm
The superconducting magnets are able to generate powerful magnetic fields because they have no electrical resistance.
To find the answer, we have to know more about the superconducting magnets.
<h3>What is superconducting magnet?</h3>
- An example of an electromagnet is a superconducting magnet.
- They are constructed from coils of superconducting wire and must be used while being chilled to cryogenic temperatures.
- Because the wire encircling the magnet has no electrical resistance when it is in its superconducting condition, they may produce powerful magnetic fields.
- Because of this, the magnet can conduct far greater electrical currents than the typical electromagnet.
Thus, we can conclude that, the superconducting magnets are able to generate powerful magnetic fields because they have no electrical resistance.
Learn more about the superconducting magnets here:
brainly.com/question/1476682
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Answer:
The correct answer is "53.15 days".
Explanation:
Given that:
Half life of 
,
- Let the initial activity be "
". - and, activity to time t be "R".
To find t when R will be "1%" of , then
⇒ 
As we know,
⇒ 
or,
∴ 
By putting the values, we get
We know that,
Decay constant, 
hence,
⇒ 
