A) coulomb | B) newton second per square meter |

C) watt per meter per degree celcius | D) joule per kilogram per Kelvin |

Explanation:

coulomb is unit of Electric Charge,

watt per meter per degree celcius is unit of Thermal Conductivity,

joule per kilogram per Kelvin is unit of Specific Heat capacity.

* Energy* tranfer takes place either by means of Heat or Work only in Thermodynamics.

**Heat ::** Heat Energy is defined as Energy that can be transferred due to temperature change.

Whereas

**Thermal Energy ::** Thermal Energy is the Internal Energy stored in the system maintained at a certain Temperature.

A) Non-elastic effects | B) Gravity |

C) Power dissipation | D) Buoyancy |

Explanation:

**Rolling friction or rolling drag** is the force resisting the motion when a body rolls on a surface. It is mainly caused by non-elastic effects, that is, not all the energy needed for deformation of the wheel, roadbed, etc... is recovered when the pressure is removed.

Another cause of rolling resistance lies in the slippage between the wheel and the surface, which dissipates energy.

A) K1k2/k1+k2 | B) 2k1k2/k1+k2 |

C) K1+k2/k1k2 | D) None |

Explanation:

We know that,

**The equivalent K = **

where L1 & L2 are plate1 & Plate2 thicknesses, K1 & K2 are coefficient thermal conductivity of plate1 & Plate2 respectively.

But here L1 = L2 = L (say)

Then **K** = **L+L/(L/K1 + L/K2)** =

A) Acceleration | B) Distance |

C) Light Intensity | D) Weight |

Explanation:

A Light-year is a distance that light travels in the vacuum in one Julian year (365.25 days).

The light-year is a unit of length used to express astronomical distances. It is about 9.5 trillion kilometers or 5.9 trillion miles.

A) Planetary Motion | B) Law of Conservation of energy |

C) Law of Gravitation | D) None |

Explanation:

**Kepler's laws** of **planetary motion** are three scientific laws describing the motion of planets around the Sun.

- Kepler’s three laws of planetary motion can be stated as follows:

**(1)** All planets move about the Sun in elliptical orbits, having the Sun as one of the foci.

**(2)** A radius vector joining any planet to the Sun sweeps out equal areas in equal lengths of time.

**(3)** The squares of the sidereal periods (of revolution) of the planets are directly proportional to the cubes of their mean distances from the Sun.