Answer:
D.
Explanation:
Given that your boat departs from the bank of a river that has a swift current parallel to its banks. If you want to cross this river in the shortest amount of time, you should direct your boat: so that it drifts with the current.
If the boat moves perpendicular to the current, the current flow will be the resistance to the movement of the boat. So, it's better for the boat to drifts perpendicularly with the current.
The best answer is therefore option D.
Answer:
Explanation:
a)8*7.2=57.6 cm^2
b)8*8=64 m^2
c)3.4*5.2=17.68 mm*2
d)2.6*4.7=12.22 m^2
e)13*5.1=13*5100=66300 m^2
Answer:
6.83 cm
Explanation:
Given data:
Focal length of the eye piece, = 2.50 cm
Focal length of the converging lens, f = 1.00 cm
distance of the object, p = 1.30 cm
Now,
we have the lens equation as:
q is the distance of the image
thus,
on substituting the values in the above equation, we get
or
q = 4.33 cm
now, the image is formed at the focal point of the eye piece,
therefore, the distance between the objective and the eyepiece, d = + q = 2.50 cm + 4.33 cm
or
d = 6.83 cm
2.85 x 10^2 (ten to the second power)