Answer:
Bouyancy
Explanation:
Bouyancy occurs when the upthrust exerted on an object is equal to the weight of object displaced. It is mostly applicable to low density objects for example balloon. When balloon is displaced in water, it floats. This is due to the effect of the upthrust acting on the balloon which allows the balloon to float and which is opposite the weight.
Note that the weight acts downwards the object while the upthrust always acts opposite (upward)
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 that
I = a + b t
b = 14 A/s , h= 1 cm , w= 15 cm , L= 1.05 m
The magnitude of induced emf is given as follows
I = a + b t
Now by putting the values in the above equation we get
Thus the induce emf will be
The answer is Anxiety. Hope this helps.