In the figure below the blue object arrow is replaced by one that is much taller than the lens. How many rays from the object will strike the lens?
5
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When NASA was communicating with astronauts on the Moon, the time from sending on the Earth to receiving on the moon was 1.33 s. Find the distance from Earth to the Moon. (The speed of radio waves is 3.00 × 10^8 m/s.)
a. 240,000 km c. 399,000 km b. 384,000 km d. 768,000 km
A soda straw is stuck into water at an angle of 36° to the vertical. Looking straight down, what does the angle of the submerged portion of the straw to the vertical appear to be?
What will be an ideal response?
Light is totally absorbed when sent through two Polaroid filters if their transmission axes are __________
Fill in the blank(s) with correct word
An object has a volume of 4.0 m3 and weighs 40,000 N. What will its apparent weight be in water of density 1000 kg/m3?
A) 40,000 N B) 39,200 N C) 9,800 N D) 800 N