Which of the following is the brightness of a star as we see if from Earth?

A. absolute magnitude

B. parallax magnitude

C. apparent magnitude

A 2.80-µF and a 4.50-µF capacitor are connected in series across a 30.0-V battery. A 6.95-µF capacitor is then connected in parallel across the 2.80-µF capacitor. Determine the voltage across the 6.95-µF capacitor.

This is the material in which a mechanical wave travels.

What is the "cosmic haystack problem"? List as many of its components as you can think of.

If six waves passed by you in two seconds, you could measure the wave's a. velocity. b. amplitude. c. frequency. d. wavelength.

What is a major compound that makes up skin

Ethylene (C2H4) reacts with oxygen gas to produce carbon dioxide and water. 45.0 grams of ethylene reacts, how many grams of carbon dioxide gas will be produced?

What causes ice to melt and water to boil

A block of mass 3.5 kg slides down a frictionless inclined plane of length 6.4 m that makes an angle of 30 degrees with the horizontal. if the block is released from rest at the top of the incline, what is its speed at the bottom

What is the wavelength of an earthquake wave if it has a speed of 5 km/s and a frequency of 10 Hz?

The gamma ray released by each decay carries 140kev of energy. find the total energy e released by decays in the 2 hours.