Explanation:
Given that, you are taking a picture of a giraffe that is standing far away from you. The image is just too small, so you swap the 60-mm-focal-length lens in your camera for a 960 mm telephoto lens such that,
We need to find the the factor with which the size of the image increases. It can be calculated by taking ratios of both 
So, 
So, the size of image increases by a factor of 16. Hence, this is the required solution.
Newton's Third Law- For every action there is an equal and opposite reaction... Does this answer your question? If not, I can explain further...
Answer:117.6joules
Explanation:
Mass(m)=2kg
Height(h)=6m
Acceleration due to gravity(g)=9.8m/s^2
Potential energy(PE)=?
PE=m x g x h
PE=2 x 9.8 x 6
PE=117.6joules
Answer:
Option C is correct
Explanation:
"The time is determined by the vertical distance. The formula is sqr(2d/a) = t. There still is no acceleration in the horizontal direction."
For the first drive
d = d
t = sqr(2d/a)
r = v
For the Second drive
d = ??
t = sqr(2d/a)
r = 2v
Since the times are same, equate the results.
t = d/v = d1/2v
v*d1 = 2v*d The v's cancel because they are related.
d1 = 2d.
You go twice as far as you did before.
Option C is correct
