Explanation

Electric fields can be detected by electrons, which are charged particles that respond to the force exerted by the electric field.

Electrons will accelerate or decelerate in the presence of an electric field, allowing for the detection of the field.

Explanation

Resistivity is a property of the material itself, and is not a factor that affects the resistance of a specific conductor.

The resistance of a conductor depends on its length, cross-sectional area, and the material's resistivity.

Explanation

• Friction is a force that opposes motion between two bodies in contact, and it arises due to the interaction between the surfaces in contact.
• The roughness of the surfaces, including microscopic imperfections and irregularities, leads to interlocking and resistance to motion.
• This resistance is what we experience as friction.

Explanation

Momentum is the quantity of motion contained in a body.

It is defined as the product of an object's mass and velocity.

Momentum is a vector quantity and is typically represented by the symbol "p".

Explanation

A constellation is a group of stars forming a pattern, located outside our solar system.

Asteroids, satellites, and comets are all within the solar system.

Explanation

 Le Chatelier's principle states that when a system at equilibrium is subjected to a change (like temperature), the system will shift to counteract the change and re-establish a new equilibrium. 

Explanation

To find the unit vector of A = 8i + 2j + 2k, follow these steps:

1. Find the magnitude of vector A:

   √(8² + 2² + 2²) = √(64 + 4 + 4) = √72

2. Divide each component by the magnitude:

   Unit vector â = (1/√72) × (8i + 2j + 2k)

Explanation

The wave velocity in any medium depends on all of the above:

Elasticity:

A medium's elasticity determines how easily it can resist deformation and return to its original shape when force is applied.

Higher elasticity means the wave can travel faster through the medium. 

Density:

The density of a medium also affects wave velocity.

Denser media tend to slow down wave propagation. 

Homogeneity:

A homogeneous medium has consistent properties throughout, meaning the wave velocity will be uniform in all directions. 

Explanation

Explanation

The particle that comprises two protons and two neutrons is an alpha particle (α).

Alpha particles are emitted from the nucleus of an atom during a type of radioactive decay called alpha decay or α-emission.