Can someone explain how exactly to calculate the net force? Do you subtract the smaller number from the larger number? Any help
would be appreciated!
1 answer:
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The distance of earth from sun is 150 million km
We know that one million = 10^6 and 1 km= 10^3 m
Hence 150 million km = 150× 10^6 ×10^3 metre=150×10^9 m
=1.5×10^11 m
The speed of light in vacuum is 2.999... m/s which can be approximately close to 3.0 ×10^8 m/s
We are asked to calculate the time taken by the light beam to reach from sun to earth.
we know that average velocity
⇒
Here distance=1.5×10^11 m and v=c= 3.0×10^8 m/s
hence time
=0.5×10^3 s
=5.0×10^2 s
A correct scientific notation is written as m×10^n [Here m is the magnitude and n is power of 10]
Hence the value of m =5 and value of n =2
Answer:
Explanation:
Given,
Student create wave of three loop on a slinky 3.75 m.
number of oscillations= 20
Time, t = 6.73 s
Frequency =
= 2.97 Hz
We need to find frequency when 5 loops is created.