A __________ lens is thinner at the center than the edges
Fill in the blank(s) with correct word
diverging
You might also like to view...
Why can't astronomers use the 21-cm line of neutral hydrogen gas to measure the masses of elliptical galaxies?
A) All elliptical galaxies are too far away for us to detect the 21-cm line. B) The disorderly motion of the material in elliptical galaxies prevents us from measuring different velocities at different sides of the galaxy. C) Elliptical galaxies have little gas, so they do not have strong 21-cm line emission. D) Supermassive black holes in the center of elliptical galaxies disturb measurements of the 21cm line.
One light-year (ly) is about _____
A) 23,000 AU B) 34,000 AU C) 56,000 AU D) 63,000 AU
A baseball thrown from the outfield is released from shoulder height at an initial velocity of 39.2 m/s at an initial angle of 30.0° with respect to the horizontal. If it is in its trajectory for a total of 4.00 s before being caught by the third baseman at an equal shoulder-height level, what is the ball's net vertical displacement during its 4.00-s trajectory?
a. 11.0 m c. 22.1 m b. 9.80 m d. zero
The buoyant force on an object is:
a. the same for all floating objects. b. equal to a constant that depends on the fluid times the weight of fluid that the object displaces. c. inversely proportional to the weight of fluid displaced by the floating object. d. equal to the weight of fluid that the object displaces. e. a fictitious force.