A convex mirror has a focal length of ?20 cm. What is the object distance if the image distance is ?10 cm?
a. 10 cm
b. 40 cm
c. 60 cm
d. 20 cm
e. 30 cm
d
You might also like to view...
Death Valley in California receives many German tourists. When you convert a summer temperature reading of 130° F to the Celsius scale they use at home, you find that the Celsius temperature is about
a. 26° C. b. 54° C. c. 72° C. d. 176° C e. 327° C.
An object is dropped from a bridge. A second object is thrown downwards 1.0 s later. They both reach the water 20 m below at the same instant. What was the initial speed of the second object? Neglect air resistance
A) 21 m/s B) 9.9 m/s C) 20 m/s D) 15 m/s E) 4.9 m/s
When an object floats in a liquid, the buoyant force is __________ the weight of the liquid displaced by the object
Fill in the blank(s) with correct word
By what factor is the capacitance of a metal sphere multiplied if its volume is tripled?
1.3 2.31/3 3.1 4.3-1/3 5.13