Answer:
Second Option: it suddenly drops to zero
Explanation:
Superconductors are resistance free materials that enable (allow) <u>electricity conduction (i.e. electron transportation between atoms)</u>.
As the superconductor temperature is gradually lowered, eventually a Critical Temperature is reached, where the <u>superconductor electrical resistivity</u> suddenly drops to zero. Such drop is so fast, that can be described as a complete matter-phase transition. This is in contrast with typical conductors,<em> where with gradually decreasing temperature there is also a gradually decreasing resistivity (which is also true at temperatures of near absolute zero). </em>
Thus the correct answer is the Second Option: it suddenly drops to zero
Answer:
<em>The car took 3 hours to travel 180 miles</em>
Explanation:
<u>Constant Speed Motion</u>
An object travels at constant speed if the ratio of the distance traveled by the time taken is constant.
Expressed in a simple equation, we have:
Where
v = Speed of the object
d = Distance traveled
t = Time taken to travel d.
From the equation above, we can solve for t:
The car travels at v=60 mi/h for a distance of d=180 miles. The time taken is:
t = 3 hours
The car took 3 hours to travel 180 miles
Basically, it sends out a signal that is the same frequency as your phone. This signal is powerful enough to outmuscle your phone's signal.
Answer:
10 m/s
Explanation:
Velocity = frequency * wavelength
Velocity = 2.5 * 4
Velocity = 10 m/s
Answer:600 miles, 12
Explanation: The movement described in the question exhibits that of a polygon. Exhibiting a constant distance and angle with only varying direction until the starting point is reached.
The sum of exterior angles of a polygon = 360 degrees.
Exterior angle of a polygon = (360 ÷ number of sides)
Therefore,
Number of sides = 360 ÷ exterior angle
Exterior angle = 30 degrees
Hence,
Number of sides = 360 ÷ 30 = 12 sides
Since distance traveled of 50 miles is the same for each displacement ;
Total displacement = distance traveled * number of sides
Total displacement = 50 * 12 = 600 miles.
