1. Give the number of significant figures in the following:
5
A.
2.9910 x 10 m
C.
.0405 ml
B.
4500 km
D.
2.000 m
4

What is hidden during a lunar eclipse? isn't the moon hidden?

Alead ball is dropped into a lake from a diving board 5m above the water . it hits the water with a certain velocity and then sink with constant velocity in bottom . it reaches the bottom 5 second after it is dropped if g= 10m/s2 . find depth of the lake and average velocity of the ball ?

What is the thinnest soap film (excluding the case of zero thickness) that appears black when illuminated with light with a wavelength of 480 ? the index of refraction of the film is 1.34, and there is air on both sides of the film. express your answer in nanometers. hint 1. how to approach th