ap computer science 1

Atoms are infinitesimally small. Smaller than any thing we can imagine. One hydrogen atom, the smallest atom known, is approximately 5 x 10 -8 mm in diameter. To put that in perspective, it would take almost 20 million hydrogen atoms to make a line as long as this dash ' - '. The extremel..

Appliances used in our day to day life are based on the principles of electricity and magnetism. Electricity is one of the most important sources of energy. Lights, fans, motors, radios and television are some common appliances which work on electricity. Historically, it was friction..

When scientists started exploring matter, they discovered that the smallest particle of an element that maintains its chemical identity through all chemical and physical changes is called and 'atom'. Just how small these atoms are can be made out if you realize that there are about 60,000,000,000,..

Kilowatt and megawatt are higher units of power. Another unit of power is horse power 1 horse power = 746 wat..

2 on an object of mass 1 kg..

Calculate the momentum of a toy car of 150 g moving with a speed of 5 m/..

Natural chlorine consists of two isotopes: Calculate the average atomic mass of chlorin..

Question: The science of classification is called 1. demography 2. taxonomy 3. biology 4. none of the above Answer: ..

Question: Explain 'Dobereiner's Triads and its drawback. Answer: Dobereiner classified elements into groups of three where the atomic weight of the middle element was approximately the average of the atomic weights of the other two. Example: A triad of lithium (Atomic weight = 7), Sodiu..

Question: Define refraction. Answer: The deviation in the path of light when it passes from one medium to another medium of different density is called refractio..