fourth grade science

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..

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 ..

Mass (m) = 50 kg Momentum (p) = 225 kgm/s Velocity (v) = ? Velocity = 4.5 ..

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

Force (F) = 225 N Acceleration (a) = 2.5 m/s 2 Force (F) = ma Mass of the body = 90..

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: The second equation of motion for a freely falling body starting from rest is _______. 1. 2. 3. 4. Answer: ..

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

Question: The S-t graph for uniform speed is 1. 2. 3. 4. Answer: ..