The nuclei of all atoms have

A. positive charges

B. negative charges

C. no charges

What do the lines around the bar magnet indicate

You are 15.0m from the source of a sound. At that distance, you hear it at a sound level of 20.0dB. How close must you move to the sound to increase the sound level to 60dB? I think its 45.0cm? 15.0cm 45.0cm 55.0cm 60.0cm 85.0cm

Due to alcohol's effect on your sense of balance, you may A. Be unaware when you're driving on a hill B. Feel like you're falling C. Make unnecessarily wide gestures

Assume that the solar radiation incident on Earth is 1330 W/m2 (at the top of the atmosphere). Find the total power radiated by the Sun, taking the average separation between Earth and the Sun to be 1.489 * 1011 m. Answer in units of W.

What are the common alkanes and their uses?

Which phases of matter do molecules have the lowest amount of energy?

How many Oxygen (O) atoms are in the following? H2O + CO2 4 3 2

How does surface roughness affect friction

Why does it hurt your hands when you carry heavy shopping in carrier bags?

Why did scientists choose carbon as a base for the atomic mass unit? Which isotope of carbon did they use?