Thin Lenses: A slide projector is set up with its lens 6.0 m from the screen. The projected image on the screen is 1.5 m square for a slide (the object) that is 2.5 cm square.(a) How far is the slide from the lens?(b) What is the focal length of the projector lens?
Fill in the blank(s) with the appropriate word(s).
(a) 10 cm (b) 9.8 cm
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When it is summer in the Northern Hemisphere, it is ________ in the Southern Hemisphere.
A) winter B) fall C) spring D) summer
If the Moon is relatively far from Earth, so that the umbra does not reach Earth, someone directly behind the umbra will see
A) a penumbral lunar eclipse. B) a partial lunar eclipse. C) a partial solar eclipse. D) an annular eclipse. E) no eclipse.
The Winter Triangle is formed by the stars Betelgeuse, Rigel, and Aldebaran
Indicate whether the statement is true or false
A car moving at a steady 10 m/s on a level highway encounters a depression that has a circular cross-section with a radius of 30 m
The car maintains its speed as it drives through the depression. What is the force exerted by the seat of the car on a 60.0-kg passenger when the car is at the bottom of the depression? A) 200 N B) 390 N C) 790 N D) 490 N E) 590 N