Explanation

• If the zero line of the Vernier scale coincides with the zero of the main scale, it means that there is no zero error.
• Zero error occurs when the zero of the Vernier scale is not aligned with the zero of the main scale, resulting in a systematic error in the measurements.

Explanation

To find the area of the chip wrapper, you multiply the length by the width:

Area = Length x Width

= 4.5 cm x 5.9 cm

= 26.55 cm^2

So, the area of the chip wrapper is 26.55 cm^2.

Explanation

Linear thermal expansion of a solid depends on:

• Increase in temperature
• Original length
• Properties of the material

Explanation

The springs in brakes and clutches are used to restore the original position of the components after they have been engaged or disengaged.

For example, in a brake system, the springs return the brake pads to their original position after the brake pedal is released.

Similarly, in a clutch system, the springs return the clutch plate to its original position after the clutch pedal is released.

Explanation

• Zero error is a type of systematic error that occurs when the instrument's zero point is not accurately calibrated, resulting in a consistent error in all measurements.
• Systematic errors are biases that affect the accuracy of a measurement, and zero error is a specific type of systematic error.

Explanation

The head-to-tail rule is a method for adding vectors, such as forces, by lining up the head of one vector with the tail of the next vector.

This rule can be used to add any number of forces, not just two or three.

Explanation

A solid has a fixed shape and a definite volume, regardless of its container.

The particles (molecules, atoms, or ions) in a solid are closely packed and have a fixed position, giving the solid its rigidity and shape.

Explanation

Elastic deformation occurs when a material temporarily changes shape in response to an external force, but returns to its original dimensions when the force is removed.

This type of deformation is reversible, meaning the material returns to its original state.

Explanation

The gravitational force between two objects is independent of the medium between them.

Gravity acts through a vacuum just as it does through a medium like air, water, or solid objects.

The presence or absence of a medium does not affect the gravitational force between the objects.

Explanation

The weight of a body is the force exerted on it by gravity.

It depends on the gravitational pull of the planet or moon it is on.

Since the gravitational pull varies from place to place (it is stronger near the surface of the Earth than on a mountain, and weaker on the Moon than on the Earth), the weight of a body also varies.