Explanation

The period of a physical pendulum can be expressed in different ways, depending on the physical parameters of the pendulum. The physical pendulum is a rigid body that rotates around a fixed axis, and its period is given by:

• T = 2π√(I/Mgd) : This is the most general expression for the period of a physical pendulum, where I is the moment of inertia of the pendulum about the axis of rotation, M is the mass of the pendulum, g is the acceleration due to gravity, and d is the distance from the axis of rotation to the center of mass of the pendulum.
• T = 2π√(1/x) : This expression is a simplified version of the previous one, where x = (Mgd)/I.
• T = √(4L/g) : This expression is applicable when the physical pendulum is a simple pendulum, where L is the length of the pendulum.

Explanation

Newton's Second law of motion:

The rate of change of momentum of any object is directly proportional to the applied force on the body.

Explanation

Ole Rømer, an astronomer from Denmark made the first quantitative measurements of the speed of light in 1676.

Explanation

Conventionally, clockwise torque is taken as negative

because clocks run in a negative direction according to the right-hand rule.

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Counterclockwise is the positive rotation direction

Explanation

• When light travels from a denser to a rarer medium, it bends away from the normal due to refraction.
• The production of an image by or as if by a mirror is called reflection.

Explanation

A lock is a device used for raising and lowering boats,

ships and other watercraft between stretches of water of different levels on river and canal waterways.

Explanation

Copper has the highest thermal conductivity (386 K m-1 K-1)

Copper has high thermal conductivity.

AGM 25-12-2022

Explanation

Newton's first law of motion is also called as Law of inertia.

• Inertia is the ability of a body by virtue of which it opposes a change.
  
• According to Newton’s first law of motion, an object will remain at rest or in uniform motion in a straight line
• unless acted upon by an external force.
  • The inertia of rest: When a body is in rest, it will remain at rest until we apply an external force to move it. This property is called inertia of rest.
  • The inertia of motion: When a body is in a uniform motion, it will remain in motion until we apply an external force to stop it. This property is called inertia of motion.

Explanation

Explanation

The formula for resistance is R = V/I.

This formula is derived from Ohm's law,

which states that the electrical resistance of a circuit is the ratio between the voltage applied to the current flowing through it