Explanation

Alpha rays are made up of positively charged particles.

Explanation

32 Fahrenheit is a Freezing point

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At temperatures below 32°F (0°C), liquid water freezes

32°F (0°C) is the freezing point of water.

At temperatures above 32°F (0°C), pure water ice melts and changes state from a solid to a liquid (water)

32°F (0°C) is the melting point.

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ND16-8-2023

Explanation

When a wire is stretched to double its length, its resistance becomes:

R' = ρ × (2L) / (A/2) = 4 × R

So, the new resistance is 4r ohms

Explanation

 Leukemia is a type of cancer that causes an abnormal increase in the production of white blood cells, which are immature and unable to fight infection effectively. 

Explanation

Filtration by a glass funnel and filter paper is very time-consuming.

Filtration using traditional tools like a glass funnel and filter paper is a slow process because:

Liquid passes through the filter gradually

Solids take time to separate completely

So, it takes a lot of time, which is what "time-consuming" means.

Explanation

Explanation

If the RC value is small in a circuit, the capacitor charges fastly. 

RC time constant: The time constant in an RC circuit is represented by the product of resistance (R) and capacitance (C). 

Charging speed: A smaller RC value means the capacitor charges faster. 

Large RC value: Conversely, a large RC value indicates a slower charging process for the capacitor. 

Explanation

In the number 8.70 × 10⁻¹²:

All non-zero digits and zeros between or after non-zero digits (if decimal is present) are significant.

So, 8, 7, and the 0 after 7 are all significant.

Therefore, the number has 3 significant figures.

Explanation

 A chromosome with unequal length of its arms is Submetacentric. 

A submetacentric chromosome has a centromere slightly off-center, resulting in two unequal arms. 

Explanation

If the maximum value of the principal quantum number (n) for an atom is 4, the total number of electrons in that atom is 32.

This is because the maximum number of electrons in a shell is given by 2n², and for n=4, this calculation results in 2 * 4² = 32.