How do we use velocity curves (obtained from spectroscopy to show that some extrasolar planets are close to their host stars?

If forces acting on an object are unbalanced, which factors may result fron an unbalanced force? check all that apply

Which diagram correctly demonstrates the various forces acting on a ball moving horizontally with some speed?

Acharge q experiences no net force at a particular point in space. which of the following situations described below must always be true? -there are no other charges nearby. -if there are other charges nearby, they must all have the same sign as q. -if there are other charges nearby, they must all have the opposite sign of q. -if there are other charges nearby, the total positive charge must equal the total negative charge. -none of the above