Explanation

A nutcracker works as a lever to multiply force.

It helps crack hard nuts with less effort.

Explanation

Temporary hardness of water is caused by dissolved bicarbonates of calcium and magnesium.

It can be removed by boiling, which decomposes Ca(HCO₃)₂ into insoluble carbonate.

Explanation

Plaster of Paris changes into gypsum on mixing with water 

It is commonly called P.O.P. is calcium sulfate hemihydrate.

The chemical formula of plaster of Paris  is CaSO4.1/2 H2O

Crystals of gypsum are produced when Plaster of Paris is mixed with water 

Gypsum is calcium sulfate dihydrate and a mineral used in cement manufacturing.

It helps in controlling the rate of hardening of the cement. 

Explanation

Tea contains water, tea extract, sugar, and milk, mixed physically.

Its components can be separated, so it is a mixture.

Explanation

The SI unit of electric charge is the coulomb, represented by the symbol C.

One coulomb is the amount of charge that passes through a conductor carrying one ampere of current for one second.

It's also equal to the charge of about 6.24 quintillion electrons or protons.

Explanation

Frequency (f) is inversely proportional to wavelength (λ):

f ∝ 1/λ => f = k/λ => k = fλ

Given: f1 = 100 kHz, λ1 = 3000 m; λ2 = 500 m

k = f1λ1 = f2λ2

100 kHz × 3000 m = f2 × 500 m

f2 = (100 kHz × 3000 m) / 500 m

= 600 kHz

Explanation

Explanation

Sodium chloride (NaCl), commonly known as table salt.

It is the main salt dissolved in seawater.

Explanation

Intel Corporation is an American multinational technology company headquartered in Santa Clara, California.

Formerly: NM Electronics (1968)

Founded: July 18, 1968

Founders: Gordon Moore and Robert Noyce

Headquarters: Santa Clara, California, U.S.

Explanation

Ganymede is the largest and most massive moon of Jupiter and in the entire Solar System,

With a diameter of about 5,270 kilometers (3,270 mi).

It is even larger than the planet Mercury.