Answer:
b)3:2
Explanation:
The dispersive power is the reciprocal of the focal length:
Given the ratio of focal lengths:
Therefore,
P₁ : P₂ = 3 : 2
Hence, the correct option is:
<u>b)3:2</u>
Answer:
there are 22 massive, positively charged, fundamental particles in the element's nucleus. Given this, the element is unquestionably titanium.
Answer:
92 m/s
Explanation:
The speed of Airplane when observed from the ground is 203 m/s i.e., speed of Airplane when there is no wind =
The speed of the airplane relative to the air is 111 m/s =
This means that the airplane is moving against the current
Speed of the current with respect to the ground =
Velocity of current has to be atleast 92 m/s
The correct choice is :
The final momentum of the bullet/block is equal to the initial momentum of the bullet.
initially the block was at rest , hence
initial momentum of the block = 0
so total initial momentum was simply equal to initial momentum of bullet only.
after collision , the bullet gets embedded in the block , and hence both block-bullet move together at common velocity . according to conservation of momentum , momentum remains conserved in any type of collision.
so final momentum of bullet-block system = initial momentum of bullet
One of the most important discoveries relating to current was made accidentally by Hans Christian Ørsted in 1820, when, while preparing a lecture, he witnessed the current in a wire disturbing the needle of a magnetic compass.
Explanation:
One of the most important discoveries relating to current was made accidentally by Hans Christian Ørsted in 1820, when, while preparing a lecture, he witnessed the current in a wire disturbing the needle of a magnetic compass.