Explanation

Gravitational force is always attractive, never repulsive.

According to Newton's law of universal gravitation, every point mass attracts every other point mass by a force acting along the line intersecting both points.

This means that gravity always pulls objects towards each other, never pushes them apart.

Explanation

Centrifugal force is a fictitious force that appears to act on an object moving in a circular path, causing it to move away from the center of the circle.

It is a result of the inertia of the object, which tends to keep it moving in a straight line.

Explanation

• Filtration
• Sedimentation
• Decantation
• Distillation
• Chromatography

Explanation

• The correct statement about the fluid mosaic model of membrane structure is: The more unsaturated the fatty acid, the more fluid nature.
• Unsaturated fatty acids have kinks in their tails that prevent the lipids from packing tightly together, thus increasing membrane fluidity.

Explanation

• A ratio is a comparison of two values or quantities, often expressed as a fraction or a decimal.
• It shows the relative size or magnitude of one value compared to another.
• For example: 2:3 or 2/3 is a ratio comparing the value 2 to the value 3.

Explanation

Explanation

Earth's magnetic field always has a horizontal component except at  At 60*latitude 

At magnetic poles, the angle of dip is  $90^o$ . Hence the horizontal  component 

 $B_H=Bcos\theta =0$ 

Explanation

• Cat and Dog is a secondary consumer.
• Because it eats primary consumers (herbivores).
• Like mice, birds, and rabbits.

Explanation

When two surfaces slide over one another the tiny bumps push on each other.

Friction causes a force on a surface that is in the opposite direction to its motion.

Friction can be reduced by the application of lubricants

ND20-1-2023

Explanation

• Have indefinite shape
• Have indefinite volume
• Can be compressed