Req=(9/2)+9=13.5 ohm

Now, I=V/Req=18/13.5 A

current flow in R2=I/2=18/27=2/3=0.67 A(approx.)

Please refer to the attached file.

A weighing scale or a balance scale is commonly used as a device to measure the MASS OR WEIGHT. Generally these are called mass scales or weight scales. This is also known as mass balances and weight balances instruments.

Luminous intensity is measured in candela.Luminous intensity is a form of energy per unit time of electromagnetic radiation. We use PHOTOMETER to measure the luminous intensity. A photometer is a radiometer calibrated to the spectral response of the human eye. For the amount of substance released in such cases we use SPECTRO PHOTOMETER. This instrument collects the data of photons liberated. Hence amount of the substance.

Please refer the attached file.

When you are moving heavy machinery a forklift is one of the best ways that you can use. These machines can move incredibly heavy loads from point A to point B with ease. Secondly inclined plane is the other option.

Submultiples means you have to tell smaller units of something. Here in this case smaller units of Kilogram can be: Gram (g) Decigram (dg) Milligram (mg) Micrograms (ug) and so on.

The shortest distance between initial and final point is called displacement.

Frictional force : opposes the relative motion between the contact surfaces of the objects. It is major necessity in our daily life such as writing on a paper(friction is present between the surface of pencil and paper through which it make possible to write) , friction facilitate us to walk , holding a glass of water,etc., These are all possible acts due to friction present. Friction can be acts as evil if we consider the amount of loss of energy in any process such as , the wear-and-tear of the tires of vehicles on the road during motion is due to friction, pushing of the heavy objects on the rough surface makes it difficult to move due to friction present. ★ So, overall we can say that friction is the necessary evil in the human life.

The factors affecting density of a substance are its mass, volume, physical state of matter and the ambient temperature.

Density of a substance is directly proportional to its mass. while inversely proportional to its volume and ambient temperature. Density of a substance also varies with the change in its physical state.