Given
The Sun is d=150 million kilometers away from Earth.
Light travels at v=3 × 10^5 m/s.
To find
How long does it take for light to reach Earth from the Sun?
Explanation
We know
Time taken is given by
Conclusion
The time taken is D.500 sec
Answer:
v = 51.36 m/s
Explanation:
given,
mass of the car = 805 Kg
circumference of the track = 4.25 Km
Force on the car in circular path, F = 3140 N
tangential speed of the car = ?
2 π r = 4250
r = 676.4 m
using formula
v² = 2638.38
v = 51.36 m/s
hence, tangential speed of the car is equal to 51.36 m/s
Answer:
Constructive interference
Explanation:
- This is an example of a standing wave produced when two ends of a string are oscillated in the same plane. The displacement of of point on two ends oscillates vertically.
- We are given that two pulses move along the string each coming towards each other and meet at a common point ( P ).
- Each pulse have their own magnitude or displacement in the vertical plane. If the pulses are to meet at a common point at the same instant, then they interfere with each other constructively.
- Where constructive interference of two pulses is the addition of magnitudes of induvidual pulses and form a single puls of the constructed magnitude.
magnitude ( New pulse ) = magnitude (Pulse 1) + magnitude (Pulse 2)
The Pyrometer. It is used for measuring relatively high temperatures.