free online science games

Question: How do the prefixes and suffixes for the open chain hydrocarbons indicate their formula? Answer: The prefixes meth-, eth-, prop-, but-, pent-, hex-, hept-, oct-, non- deca- indicate that the number of 'C' atoms in the molecule of hydrocarbons is 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 re..

Gravitational Force between two Light Objects - Let us now calculate the force of gravitation existing between two unit masses separated by a unit distance. m 1 = 1 kg m 2 = 1 kg d = 1m G = 6.6734 x 10 - 1 1 Nm 2 /kg 2 This is a very weak force. To find Force existing between two objects of masses ..

Question: How many gram atoms are present in 69 grams of sodium? Answer: The number of gram atoms present in 69 grams of sodium is ..

Question: Impulse = _________. 1. 2. 3. 4. Answer: ..

According to Newton's law of gravitation, the force of attraction is directly proportional to the mass of the body. Consider two objects of mass m separated by a distance d, then the force between them is given by the relation Two Objects of Mass m Separated by a Distance d When the mass of one of ..

Let us now calculate the force of gravitation existing between two unit masses separated by a unit distance. m 1 = 1 kg m 2 = 1 kg d = 1m G = 6.6734 x 10 - 1 1 Nm 2 /kg 2 This is a very weak force. To find Force existing between two objects of masses 60kg and 100kg separated by a distance of 1m: F ..

Question: SI unit of acceleration is __________. 1. 2. 3. 4. Answer: ..

Question: A body travels from A to B in 10 seconds with a speed of 50 km/h and returns with a speed of 100 km/h in 5 s. Find the average speed. Also find the average velocity for the whole journey. Answer: Distance from A to B = Speed x time = 50 km/h x 10 s Total distance from A t..

Question: The relation between wave velocity 'v', frequency 'f ', and wavelength ' l ' is ______. 1. 2. 3. 4. Answer: ..

The two isotopes are..