Explanation

The Experimental method requires hands-on activities and individual attention, which is difficult in overcrowded classrooms.

It is less practical compared to methods like Lecture or Demonstration in large groups.

Explanation

A terrestrial food chain typically starts with a producer (like grass), followed by primary consumers (herbivores like grasshoppers), then secondary consumers (like snakes), and ends with top predators (like eagles).

This sequence shows the correct flow of energy from plants to top carnivores.

Explanation

In SHM, total energy (kinetic + potential) remains constant if no external force or damping is present.

Though kinetic and potential energy change with time, their sum stays the same throughout the motion.

Explanation

The associative property w.r.t addition states that the order in which we add numbers does not change the result.

The correct equation is:

1 + (4 + 3) = (1 + 4) + 3

This equation represents the associative property of addition.

Explanation

The sentence is in simple past tense → He decorated.

Passive form of simple past is:

was/were + past participle → were decorated.

Explanation

e/m = 2E/B²r²

The formula is derived by equating the magnetic Lorentz force to the centripetal force and using the kinetic energy gained from the accelerating voltage E.

This formula correctly relates the charge-to-mass ratio of an electron to the magnetic field B, radius of the circular path r, and accelerating voltage E.

Explanation

When a body moves with uniform velocity, its speed and direction remain constant throughout the motion.

In such a case, the average velocity over any time interval is equal to the instantaneous velocity at any moment.

Explanation

Step-by-step Solution:

Given numbers:

17, 13, 18, 17, 14, 18, 19, 17, 13, 16, 18, 20

1. Arrange in ascending order:

13, 13, 14, 16, 17, 17, 17, 18, 18, 18, 19, 20

2. Count the numbers:

Total = 12 (even number)

3. Median = average of the 6th and 7th terms:

6th term = 17, 7th term = 17

Median = (17 + 17) / 2 = 17

Explanation

An electric generator converts mechanical energy (like rotation from a turbine) into electrical energy using electromagnetic induction.

The mechanical movement causes a conductor to cut magnetic field lines, generating electric current.

Explanation

The highest level of learning in the affective domain is Characterizing.

• Receiving/Attending
• Responding
• Valuing
• Organizing
• Characterizing