Camden constructs a model of a double convex lens using two clear plastic circles that are round on one side and flat on the other. He attaches the circles at the edges. How does his model look? A
It is thicker on the left side and thinner on the right side.
B
It is thicker in the middle and thinner at the edges.
C
It is completely flat from the middle to the edges.
D
It is thinner in the middle and thicker on the edges.

What component of earth’s atmosphere exists entirely as a result of photosynthesis?

Acentrifuge in a medical laboratory rotates at an angular speed of 3,700 rev/min. when switched off, it rotates through 54.0 revolutions before coming to rest. find the constant angular acceleration (in rad/s2) of the centrifuge. your response is within 10% of the correct value. this may be due to roundoff error, or you could have a mistake in your calculation. carry out all intermediate results to at least four-digit accuracy to minimize roundoff error. rad/s2

Which system of units is used by only a small number of countries in the world, including the u.s.