What is the mass number of an atom that has 12 neutrons and 11 protons?

24

23

12

What is the most useful property of semi-metals

The main source of a hurricanes energy comes from

How long can you play tennis on the 949kJ of energy in a candy bar? Assume that the average power consumption for a person playing tennis is 440W.

What's the velocity of a ball falling with 100 joules of kinetic energy and a mass of 2 kilograms? Use the formula,.

Which best describes the motion of the object between 1 and 4 seconds?

The liquid contained in batteries that conducts electric charge is called the: solution, electrolyte, suspension, colloid

Someone jumped from a high altitude at 31,000m above the earth. he freefalled for 4 min and 36 secs with top speed of 988 mph

What does the law of reflection mean?

Compared with the peak wavelength given off by the sun, what is the peak wavelength given off by a hotter star? A.) shorter in wavelength and higher in energy B.) shorter in wavelength and lower in energy C.

4. Explain the doppler effect. Be sure to talk about how the wave changes, the perceived change hear by a person that an emitted sound is moving towards, and the perceived change hear by a person that an emitted sound is moving away from. 5.