Questions

Galton's whistle is also called as Dogs whistle or silent whistle, is a type of whistle that emits sound in the ultrasonic range, which people cannot hear but some other animals can, including dogs and domestic cats, and is used in their training.

True, the given statement that a myocardial infarction is a heart attack.

A cell undergo meiosis, and it produces 4 haploid cells from a single diploid cell.

Hence, the given statement is true.

Himachal pradesh 

The amount of water vapor ranges from a trace amount up to 4% of the mass of air. Water vapor exists as an invisible gas in the air.

The amount of water vapor in the air is called absolute humidity. The amount of water vapor in the air as compared with the amount of water that the air could hold is called relative humidity.

The maximum amount of water vapor that can be in the air depends on the air temperature.

The American Planning Association (APA) has announced this year's international excellence award for the Bhubaneswar smart city project.

The award called Pierre L'Enfant International Planning Excellence Award 2017 will be given on May 8 in New York city.

This is the first time in the 50 years history of APA's annual award programme that an Indian city has been recognised for its planning efforts.

The particles which makes upon an atom are called subatomic particles. Electrons, protons and Neutrons that makes an atom are called subatomic particles.

Whereas,

An ion is an atom or group of atoms in which the number of electrons is different from the number of protons.