ap computer science a test

Everything that exists in our universe is made up of this tiny particle called atom. The computer you are working on is made up of atom..

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 extremely small si..

. But it was the American inventor, Benjamin Franklin (1706 - 1796) who experimented with electricity and made major inroads in understanding the phenomenon. By the middle of the eighteenth century, there were machines that could generate large electrical charges. Static electricity may produce dra..

Structure of Atom - 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 ab..

Matter In Our Surroundings - Matter can be defined as anything that occupies space, (i.e., has a volume), possesses mass, offers resistance and can be felt through one or more of our sense..

Question 1 - Question: 1 km/h = _____ m/s 1. 2. 3. 4. Answer:..

The occurrence of starch in the leaves proves that photosynthesis has taken place. Starch can be tested with the help of iodine solution. This is done in the following manner: The leaf is first decolourised by treating it in 90% ethanol (alcohol) solution. It is then rinsed in hot wate..

Question 1 - Question: What is a symbol? What information does it convey? Answer: A short hand representation of an element is called symbol. It represents the following: Name of the element One atom of the element One mole of atoms. It represents 6.023 x 10 23 atoms of the element. A definite mass..

Question 1 - Question: The approximate number of cells in a normal human body is ____. 1. 10 2. 100 3. 10 1 4 4. 10 1 4 4 Answer:..

Question 1 - Question: Define force of gravitation. Answer: The force of attraction which exists between any two objects in the universe is known as force of gravitatio..