Explanation

• When two opposite poles (north-south or south-north) of magnets are brought close to each other, they attract each other.
• This is because opposite poles have different polarities and therefore pull each other together.

Explanation

• When two same poles (north-north or south-south) of magnets are brought close to each other, they repel each other.
• This is because like poles have the same polarity and therefore push each other away.

Explanation

h = u²/2g = (16)² / (2 × 9.8) = 256 / 19.6 = 13.06 ≈ 13.1 m.

Explanation

Calculate the second frequency. Divide the first frequency by the number of parts.

1/4=0.25     

Explanation

In solids, heat transfer occurs primarily through conduction, where vibrations and collisions of particles (atoms or molecules) transfer energy from one point to another.

Explanation

 The wave nature of light was primarily proposed by Christian Huygens.

Explanation

In circular motion, the centripetal force  𝐹 required to keep an object moving in a circular path is given by the formula:

𝐹= 𝑚 𝑣^2/ 𝑟

Where:

m is the mass of the object,

v is the velocity of the object,

r is the radius of the circular path.

If the velocity v is doubled, the centripetal force becomes:

F ′ =  m(2v) ^2/r = 4mv ^2/r =4F

This means that if the velocity is doubled, the force will be four times the original, not twice or half the original.

Therefore, neither of the options provided is correct.

Explanation

Explanation

Explanation

if the phase of vibration Θ = π/ z radians, and you are saying that a quarter of the cycle is completed

Then we can equate these two conditions to find the value of z.

In Simple Harmonic Motion (SHM), one complete cycle corresponds to 2π radians. Therefore, if  Θ = π/ z radian represented a quarter of the cycle, then we can write:

 Θ = π/ z = 1/ 4 x 2 π

simplifying 

  π/ z =  π/ 2

 Now, to find the value of z, we can cross-multiply

z = 2

So, when the phase of vibration Θ = π/ z radians and a quarter of the cycle is completed, the value of z is 2.