As earth travels in its different constellations are visible at different times of the year.
a. atmosphere
c. galaxy
b. orbit
d. star cluster

Which of the following is the result of the nuclear weak force? the instability of large nuclei the repelling force between positively charged protons the structure of the atom certain types of nuclear decay

A0.580-kg rock is tied to the end of a string and is swung in a circle with a radius of 0.500 meters. the velocity of the rock is 4.50 m/s. what is the centripetal force acting on the rock? 15.5 n 5.22 n 69.8 n 23.5 n

If the chemical properties of a substance remain unchanged and appearance or shape of a substance changes it is called a ?