Question

In a college there are 1225 students, out of which 700 are girls: find the ratio of boys to the number of girls, fi d the ratio of boys to the number of students.​

Answer 1

HOPE IT HELPS YOU。。。。。。。

Answer 2

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1. Cosmic rays are high-energy protons and atomic nuclei that move through space at nearly the speed of light. They originate from the sun, from outside of the solar system in our own galaxy, and from distant galaxies. They were discovered by Victor Hess in 1912 in balloon experiments

• A gamma ray, or gamma radiation, is a penetrating form of electromagnetic radiation arising from the radioactive decay of atomic nuclei. It consists of the shortest wavelength electromagnetic waves and so imparts the highest photon energy.

• Alpha particles, also called alpha rays or alpha radiation, consist of two protons and two neutrons bound together into a particle identical to a helium-4 nucleus. They are generally produced in the process of alpha decay, but may also be produced in other ways.