Physics

In the CGS (centimeter-gram-second) system, the unit of force is the dyne. One dyne is the force required to accelerate a mass of one gram at a rate of one centimeter per second squared. Newton is the SI unit of force, erg is a unit of energy in CGS, and joule is the SI unit of energy.

The electrostatic force between two elementary charged particles such as electrons is approximately 10^36 times stronger than the gravitational force between them at the same distance. This is a well-known fact in physics, reflecting the relative strengths of the fundamental forces. Therefore, the correct answer is option B (10^36). The originally given correct answer (C, 10^12) is incorrect, and the explanation in the question also supports 10^36 as the correct ratio.

In an isentropic process, which is both adiabatic and reversible, no heat is exchanged with the surroundings, so all the work done comes from the internal energy change. Thus, effectively, all the supplied energy is converted into work. In contrast, isothermal, isochoric, and isobaric processes involve heat exchange without full conversion to work.

A bird on a high tension wire does not get electrocuted because its body does not provide a closed circuit for current to flow through to the ground. Without a potential difference across its body, current does not pass through it.

The force transmitted through a string, rope, or cable when it is pulled tight is called tension. It acts along the length of the string and pulls equally on the objects at both ends.

The average translational kinetic energy per molecule of an ideal gas is given by (3/2)kT, where k is the Boltzmann constant. Since R = N_a k (R is the gas constant and N_a is Avogadro's number), the expression can be written as (3RT)/(2N_a), which corresponds to option C.

The universal gas constant R is accurately given as 8.314 J/(mol·K), which is the standard value used in physics and chemistry for calculations involving ideal gases.

Time is a fundamental (base) quantity in physics, not derived from other quantities. Density, volume, and area are all derived quantities calculated from base quantities such as mass, length, and time.

A photostat machine works on the principle of electrostatic image making, where an electrostatic charge is used to create an image on a photoconductive surface, which is then transferred to paper.

The acceleration due to gravity on a planet depends on its mass and radius. According to NASA's planetary data, Mercury's surface gravity is approximately 3.70 m/s², which is slightly less than Mars' surface gravity of about 3.71 m/s². Jupiter and Neptune have much higher surface gravities (about 24.79 m/s² and 11.15 m/s² respectively) due to their larger masses. Therefore, among the given options, Mercury has the minimum acceleration due to gravity.