The modern science of spaceflight and rockets rest on Newton’s Three Laws of Motion, a set of ideas and equations developed in the 1600s. In particular, the Third Law, which relates the action and reaction of forces, is essential to explain how a rocket accelerates. To make a rocket move forward, its engines point rearward. The action of the engine thrust produces a reaction on the rocket, accelerating it.

Correct Option: A

The modern science of spaceflight and rockets rest on Newton’s Three Laws of Motion, a set of ideas and equations developed in the 1600s. In particular, the Third Law, which relates the action and reaction of forces, is essential to explain how a rocket accelerates. To make a rocket move forward, its engines point rearward. The action of the engine thrust produces a reaction on the rocket, accelerating it.

Universal Constant of Gravitation is represented by G and is derived from Newton’s law of gravitation. Dimensional Formula of Universal Constant of
Gravitation=

Correct Option: D

Universal Constant of Gravitation is represented by G and is derived from Newton’s law of gravitation. Dimensional Formula of Universal Constant of
Gravitation=

There is one point on the Fahrenheit and Celsius scales where the temperatures in degrees are equal. That is -400 Celsius or Fahrenheit.

Correct Option: D

There is one point on the Fahrenheit and Celsius scales where the temperatures in degrees are equal. That is -400 Celsius or Fahrenheit.

Laser, an acronym for Light Amplification by Stimulated Emission of Radiation, creates a radiation beam that is coherent (in-phase). In a coherent light source, the amplitude of the radiated waves is added and results in a radiation beam of great intensity. It normally produces only one or two wavelengths. The single wavelength is called monochromatic radiation.

Correct Option: B

Laser, an acronym for Light Amplification by Stimulated Emission of Radiation, creates a radiation beam that is coherent (in-phase). In a coherent light source, the amplitude of the radiated waves is added and results in a radiation beam of great intensity. It normally produces only one or two wavelengths. The single wavelength is called monochromatic radiation.

Ohm’s law states that the current through a conductor between two points is directly proportional to the potential difference across the two points. It defines the relationship between the three fundamental electrical quantities: current, voltage, and resistance.

Correct Option: B

Ohm’s law states that the current through a conductor between two points is directly proportional to the potential difference across the two points. It defines the relationship between the three fundamental electrical quantities: current, voltage, and resistance.