What are the building blocks of all matter a. protons b. cells c. electrons d. atoms

Aparticle initially moving east with a speed of 20.0 m/s, experiences an acceleration of 3.95 m/s, north for a time of 8.00 s. what was the speed of the particle after this acceleration, in units of m/s? give the answer as a positive number.

Chemical energy is a form of energy. a. heat b. kinetic c. potential d. electromagnetic

Should we celebrate the voyages of zheng he mini q answer key