Determine the angular speed, in rad/s of: a. Earth about its axis
b. the minute hand of a clock
c. the hour hand of a clock
d. an egg beater turning at 300 rpm.

Explanation:

A. The earth about its axis:

The earth makes one revolution in 24 hours. to know the number of revolutions per second it makes, we need to convert hours to seconds and the revolution to rad.

B. The minute hand of the clock makes one revolution in 60 minutes

To convert this to rad per second, we have

C. The hour hand of  a clock completes one revolution in 12 hours

D. an egg beater turning at 300 rpm.

convex lenses are thicker at the middle. rays of light that pass through the lens are brought closer together (they converge). a convex lens is a converging lens. when parallel rays of light pass through a convex lens the refracted rays converge at one point called the principal focus.

here are some information of the future of geothermal energy:

-the future of geothermal energy can pretty much be summed up with a single word: more

-scientists plan in going deeper than 120 meters

-we are hoping that one day, we will get all of our energy from renewable energy sources such as geothermal energy

hope this !