A Headland,a Sea Cave,a Sea Arch, and a sea cut cliff.
Answer:
Explanation:
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Answer:
The answer is Letter B The car travel at a constant veloc
Answer:
option a
Explanation:
Light is an electromagnetic wave which can travel in vacuum as well as any medium. The speed of light is maximum in vacuum. The electromagnetic wave travels by oscillating electric and magnetic field to the direction of motion of wave.
On the other hand, sound waves are mechanical waves which can only travel in a medium as they can only move forward by oscillating material particles.
Thus, the student should conclude option a.
Answer:
The second car must go with a speed of 63.43 m/sec
Explanation:
Speed V of lead car = 62.3 m/sec
Distance S = 55 laps = 55 ×400 meters=22000 m
We know
S = V × t
So,
t= S/V
We put values of S and V here, we get
t=22000/62.3
t= 353.1 sec
So in 353.1 sec the second car which is one lap behind - must go a distance of 55+1=56 laps or 56×400 m = 22400 meters to catch the lead car before it finishes.
i-e for second car
Distance S= 22400m
Time t = 353.1 sec
V= ?
using again
S=Vt
we get
V= S/t
V= 22400/353.1= 63.43 m/sec