A ball is dropped from a rooftop of a building and falls for two seconds. The acceleration of gravity is 9.8 m/s2 . The ball is referred to at the two second time. The velocity is __________
Fill in the blank(s) with correct word
6 m/s
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Why are the halo stars distributed spherically instead of throughout the disk?
What will be an ideal response?
What is the difference between velocity and speed?
A. There is no difference, they are both vectors. B. Speed is a scalar and velocity is a vector. C. Speed is a vector and velocity is a scalar. D. There is no difference, they are both scalars.
The ultimate fate of our Sun is to ________
A) become a white dwarf that will slowly cool with time B) become a rapidly spinning neutron star C) become a black hole D) explode in a supernova
A light ray in air is incident on an air-to-glass boundary at an angle of 30.0° and is refracted in the glass at an angle of 16.7° with the normal. Find the index of refraction of the glass
a. 1.74 c. 1.23 b. 1.40 d. 2.13