fourth grade science

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

Which of the following two nuclei are isotopes of each other..

Classify the following elements as metals or non-metals based on valence electron..

Mass of the body (m) = 5 kg Velocity of the body (v) = 15 m/s Kinetic energy Kinetic energy = 562.5 J 02. A dog of mass 20 kg is running at a constant speed of 12 m/s. Calculate the kinetic energy of the dog while it is runni..

Question: Who was Gregor Mendel and what was his contribution to science? Answer: Gregor Mendel was an Austrian monk who first started the study of inheritance in an organized manner. This was the beginning of genetics and therefore, he is called the Father of Genetic..

Dependence of Gravitational Force on Mass - 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 Separa..

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

In the first compound hydrogen = 5.93% Oxygen = (100 -5.93) = 94.07% In the second compound hydrogen = 11.2% Oxygen = (100 -11.2) = 88.88% Ratio of the masses of oxygen that combine with fixed mass of hydrogen 15.86: 7.9 or 2:1 The ratio illustrates the law of multiple proportio..

The mathematical representation of Newton's second law of motion is If F = 0 i.e., in the absence of an external force the acceleration of the object will be zero, which means that the object will either move with uniform velocity or is at rest. This is Newton's first law of motion. Thus, we c..