Answer:
Apparent frequency increases for Bob and decreases for Jill.
Explanation:
Doppler effect refers to the apparent change in frequency when there is relative motion between source and the listener. When the source and listener move closer, the apparent frequency heard by the listener increases. And when the source and listener move away from each other, the apparent frequency heard by the listener decreases.
Thus, when the emergency vehicle approaches Bob, the apparent frequency of the siren increases. It moves away from Jill, the apparent frequency heard by the Jill decreases.
Answer:
Part a)
Center of mass with respect to the left end is given as
Part b)
Center of mass with respect to middle bead is
Part c)
Center of mass with respect to middle bead is
Explanation:
Part a)
As we know that the center of mass of the system of mass is given by the formula
here we have
Now we have
Part b)
As we know that the center of mass of the system of mass is given by the formula
here we have
Part c)
Now plug in the values in above formula
Answer:
<span>Plants that have been buried</span>
Explanation :
According to the provided graph it is showing that the plant dies and buried before microbes which make them decay , then heat and pressure in Earth's crust for millions of years which can turn into coal,gas, or oil which then is extracted and burnt to create carbon dioxide in which a plant takes it in and the process repeats
The easiest way I know to explain it is this:
-- Take a flashlight and a ball into a dark room.
-- Turn on the flashlight and point it at the ball.
-- Half of the ball is lighted up by the flashlight, and the other half is dark.
-- There is no way you can turn or twist the ball to make more or less
than 50% of it lighted up and more or less than 50% of it dark.
<em>Everything</em> in the solar system ... as long as it's shaped like a ball ... is
half illuminated by the sun and half dark.
Answer:
option D is correct
Explanation:
cl has 17 electrons if it has 18 it becomes cl-
