If the powerboat is operating at night, the light that must be shown is: <span>A white masthead light
Since dark colors dominated the surrounding during the night time, a white masthead light will provide the exact contrast for the color in the surrounding, which makes it easily identified from far away.</span>
Answer: 2 blocks east if i'm not mistaken.
Lower Pitch Due to the change to a lower frequency
Answer:
first point at which the image focuses will be closer
Explanation:
given data
converging lens = 10 cm
converging lens = 5 cm
lens = 5 cm
to find out
would the first point at which the image focuses be closer or farther
solution
we apply here lens formula that is
1/f = 1/u + 1/v ......................1
so here
v = f × u / u - f
so here for f = 10 cm v will be
v = 10u / u-10 ..........................2
and
for f = 5 cm v will be
v = 5u / u-5 . ........................3
now if we compare equation 2 and 3 we can say that
v for f = 5 cm is greater than v for f = 10 cm
so here first point at which the image focuses will be closer
proposed that the continents plowed through crust of ocean basins, which would explain why the outlines of many coastlines (like South America and Africa) look like they fit together like a puzzle.
