Answer 1 : The correct option is C.
Explanation :
The property of liquid is, they have fixed volume but do not have fixed shape. when a liquid is transferred from one container to another then the volume remains the same, but the shape changes according to the shape of the container.
Answer 2 : The correct option is A.
Explanation :
pH : It is defined as the negative logarithm of the hydronium ion concentration.
The expression of pH is,
1. By Newton's second law, the mathematical relationship between force, mass and acceleration can be described.
2. An object will undergo acceleration only when an unbalanced force will be acting on any object.
Answer:
Explanation:
1. The mathematical relationship between force, mass and acceleration is done in the Newton's second law of motion. In this law, it is stated that any external unbalanced force acting on any object will be equal to the rate of change of momentum. In other words, the external unbalanced force will be proportional to the acceleration exerted on the object and also to the mass of the object.
Since, momentum p = mass * velocity = mv
Since, the mass will be constant, dm/dt = 0, so F = ma
2. Also from this law, it can be understood that an object will undergo acceleration only when an unbalanced force will be acting on any object.
To determine the mass of an atom in terms of atomic mass unit (a.m.u.) the standard should have the fixed mass otherwise the calculated mass of the other atoms will get error. Initially oxygen was used as the reference standard for the calculation of other atoms mass. But after the invention of different isotopes of oxygen i.e. and
which ratios with respect to
is 1.002 the mass of standard oxygen became unstable. Thus the mass of the new atom have error. Thus in 1961 the standard reference is canged to carbon-12. After that onward the mass of the other atoms are measured with respect to carbon.