Suppose that you measure a galaxy's redshift, and from the redshift you determine that its recession velocity is 30,000 (3*104 kilometers per second. according to hubble's law, approximately how far away is the galaxy?

A rock weighing 98 newtons is pushed off the edge of a bridge 50 meters above the ground. What was the potential energy of the rock before it began to fall?

An unstable high-energy particle enters a detector and leaves a track of length 1.05 mm before it decays. Its speed relative to the detector was 0.992c.

When light bounces off a surface, which component will be reflected more - the component that is parallel to the surface, or the component that is perpendicular to the surface, and why?

Charge q is a unit of distance away from the source charge S. Charge p I'd two times further away. The force exerted between S and q is 4 times the force extended between S and q

A flute player hears four beats per second when she compares her note to a 784 Hz tuning fork (the note G). She can match the frequency of the tuning fork by pulling out the "tuning joint" to lengthen her flute slightly.

The atomic emission spectra of a sodium atom on earth and of a sodium atom in the sun would be

The Mississippi River carries tons of tiny rock fragments called sediments into the Gulf of Mexico. What do u think will happen to these sediments in a few million years

True or False: If the initial speed of an object is zero, then the initial position of the object must be the origin. Explain

que potencia se disipa en un aparato eléctrico que opera con un voltaje de 60V y una corriente eléctrica de 1.5 A

List three things you have done today that used kinetic energy.