Answer:
7.65 X 10^12 m/s
Explanation:
When the debris falls, at that instance P.E = K.E
mgh=mv^2/ 2
mass of the earth= 5.972 × 10^24
height=5.972 × 10^24/2
Height h= 2.986 × 10^24
V=√(2gh)
V= √(2 * 9.8 * 2.986 *10^24)
V= 7.65 X 10^12 m/s
Answer:
Ans 171.875 m(according to the units)
Explanation:
As we know,
to find the distance, we need to use this eqn..
speed = distance/ time
So, time is 1.92 s (as given)
the speed is 330 m/s ( in air speed)
so to find it is easy to find by using this
eqn..
speed =distance/time
330 =distance/1.92
330/1.92 =distance
171.875 = distance
Diverging lens diverges ray of light. Their focal length is taken as negative because according to sign convention, the radius of curvature of that surface on which light refracts is to the left and every number to the left of 0 in real number line is taken as negative.
Pole is considered as origin. If focal point(F) lies to the left of pole, then it is taken as negative. Why? it is a rule
i don't know the anss , sorry.