According to astronomers’ best measurements, space appears...
A.) infinitely old
B.) 8 billion years old
C.) flat
D.) positively curved

Suppose an objects initial velocity is 10m/s and it’s final velocity is 4 m/s. mass is constant. what can best be concluded about the object based in the work-energy theorem

Which sound characteristic is not affected by the relative motion of an object

An electron is traveling with initial kinetic energy k in a uniform electric field. the electron comes to rest momentarily after traveling a distance d. (a) what is the magnitude of the electric field