Explanation

• GPS is an abbreviation of the Global Positioning System.
• It is a satellite-based radio navigation system.
• Owned by the United States government. 
• First launch: February 22, 1978

Last verified on 05-09-2026

Explanation

• All plants move Anticlockwise around Sun.
• All plants move anticlockwise around their axis.
• Earth rotates its axis from West to East.

Last verified on 15-03-2026

Explanation

Isotopes are atoms of the same element (same number of protons/nuclear charge) but different masses (different number of neutrons).

Explanation

Sound wave is a mechanical  wave.

Electromagnetic waves are waves that consist of oscillating electric and magnetic fields

That propagate through space without needing a medium.

Sound waves, on the other hand, are mechanical waves that require a medium (like air, water, or solids) to travel through. 

Explanation

COVID-19 is caused by a virus, specifically the SARS-CoV-2 virus.

The first infections with SARS-CoV-2 appeared in Wuhan in 2019.

Explanation

If y is directly proportional to x², it means that:

y ∝ x²

This can be written as an equation:

y = kx²

where k is the constant of proportionality.

Given Information:

We are given that y = m for a particular value of x. Let's call this value x₁.

So, we have:

m = kx₁²

Doubling the Value of x:

Now, we double the value of x. Let's call this new value x₂. So, x₂ = 2x₁.

We want to find the new value of y, let's call it y₂, when x = x₂.

Using the proportionality equation:

y₂ = kx₂²

Substitute x₂ = 2x₁:

y₂ = k(2x₁)²

y₂ = 4kx₁²

Substituting the value of kx₁² from the first equation:

We know that kx₁² = m. So, we can substitute this into the equation for y₂:

y₂ = 4m

Explanation

The scintillation nuclear radiation detector detects the alpha rays per second. When the energy of the alpha rays (Eα) in MeV increases, the number of counts (Nc) on the detector also increases linearly as shown in the table below. 

Draw the graph of Nc as a function of Eα (MeV) and find the energy of the unknown alpha ray if the number of counts is 31600.

0.35/10000 = 0.000035

1------>0.000035

1600 ------> 1600×0.000035

1600 ------> 0.056

0,65 = 0.056 = 0.706

Explanation

Total number of cards: 12

(i) Probability of drawing '8'

• Favorable outcomes: 1 (card number 8)
• Probability: 1/12

(ii) Probability of drawing an even number

• Favorable outcomes: 6 (2, 4, 6, 8, 10, 12)
• Probability: 6/12 = 1/2

(iii) Probability of drawing a perfect square

• Favorable outcomes: 4 (1, 4, 9)
• Probability: 4/12 = 1/3

(iv) Probability of drawing a negative number

• Favorable outcomes: 0 (no negative numbers)
• Probability: 0/12 = 0

(v) Probability of drawing a number less than 13

• Favorable outcomes: 12 (all cards are less than 13)
• Probability: 12/12 = 1

In summary:

• Probability of drawing '8': 1/12
• Probability of drawing an even number: 1/2
• Probability of drawing a perfect square: 1/3
• Probability of drawing a negative number: 0
• Probability of drawing a number less than 13: 1

Explanation

Explanation