Thank you for posting your question here at brainly. I hope the answer will help you. Feel free to ask more questions.
<span>If both surfaces are convex the lens is thicker at its center than its edges. A lens with one surface convex and one concave is called meniscus. Some lenses change the direction of the rays enough to cause the rays in a bundle to emerge convergent, that is, converging toward a common point. Whatever the mix of surfaces, if the lens is thicker at its center than its edges it is called a converging lens (having positive focal length). If it is thinner at its center than its edges it is called diverging (having negative focal length).</span>
<u>Given</u><u> </u><u>-</u><u> </u>
- Velocity (v) = 12.1 m/s
- Time (t) = 8.2 sec
<u>To</u><u> </u><u>find</u><u> </u><u>-</u>
<u>Solu</u><u>tion</u><u> </u><u>-</u><u> </u>
★ Acceleration = velocity/ time
→ A = 12.1/8.2
→ 1.47.... m/s²
<u>There</u><u>fore</u><u>,</u><u> </u><u>the</u><u> </u><u>accele</u><u>ration</u><u> </u><u>of</u><u> </u><u>the</u><u> </u><u>runner</u><u> </u><u>will</u><u> </u><u>be</u><u> </u><u>1</u><u>.</u><u>4</u><u>7</u><u> </u><u>m</u><u>/</u><u>s²</u><u>.</u>
What does "the following" mean ?
Kinetic energy is directly proportional to speed² .
So kinetic energy doubles if the speed is increased by √2 .
(3 m/s) · (√2) = <em>4.243 m/s</em>
it is desirable for the microscope to be parfocal because then you do not have to refocus the microscope everytime you change objective lenses.
Answer:
The Galactic Center (or Galactic Centre) is the rotational center, the barycenter, of the Milky Way galaxy. Its central massive object is a supermassive black hole of about 4 million solar masses, which powers Sagittarius A*, a compact radio source which is almost exactly at the galactic rotational center.