What are the functions of the objective lens in the refracting telescope?
The objective lens collects light from the distant object and brings the light rays to a
focus, forming an image that is the object for the eyepiece.
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A submarine dives to a depth of 50 meters in the ocean. (a) What is the gauge pressure at this depth? (b) What is the force acting on a hatch that has an area of 2.5 square meters?
In all interactions __________ number is conserved
Fill in the blank(s) with correct word
In beta minus decay, the number of neutrons in the nucleus
A) is decreased by 1. B) is decreased by 2. C) is increased by 1. D) is increased by 2. E) remains unchanged.
Neglecting air resistance, a bullet fired straight down from the top of a high cliff has an acceleration of
A) less than 10 m/s2. B) 10 m/s2. C) more than 10 m/s2. D) depends on the height of the cliff.