Answer:
The correct option is: d. Fiber-optic
Explanation:
A fiber-optic cables or an optical-fiber cable is a cable that is composed of a bundle of optical fibers. These cables are used for transmitting information or digital signals over long distances.
Each optical fiber in an optical-fiber cable is individually coated with a protective plastic cover and contained in a protective tube. Therefore, an optical-fiber cable is not affected by any electromagnetic interference or radio frequency interference.
Answer:
The car traveled, d = 20 Km
Explanation:
Given that,
The speed of the car, v = 40 Km/h
The time taken by the car is, t = 0.5 h
The distance covered by the car for half an hour, d = ?
The relation between the velocity and displacement is given by the formula,
<em> v = d / t</em>
Therefore,
d = v x t
Substituting the given values in the above equation,
d = 40 Km/h x 0.5 h
= 20 Km
Hence, the distance covered by the car is, d = 10 Km
Answer:
t=40s,
Explanation:
If you can swim in still water at 0.5m/s, the shortest time it would take you to swim from bank to bank across a 20m wide river, if the water flows downstream at a rate of 1.5m/s, is most nearly:
from the question the swimmer will have a velocity which is equal to the sum of the speed of the water and the velocity to swi across the bank
Vt=v1+v2
the time is takes to swim across the bank will be
DY=Dv*t
DY=distance across the bank
Dv=ther velocity of the swimmer across the bank
t=20/ 0.5m/s,
t=40s, time it takes to swim across the bank
velocity is the rate of displacement
displacement is distance covered in a specific direction
I believe the answer is B. comets
