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Give the names of three commonly known types of subatomic particles along with their charge and relative masses. In the basic model of the atomic structure, where would one find each of these particles?

The three subatomic particles are electrons, protons and neutrons. Protons are positively charged and have a relative mass of 1 whilst neutrons are neutral in charge and also have a positive charge of 1. ...

Answered by Matthew H. • Chemistry tutor

6751 Views

What factors should be taken into account when deciding which advertising media to use?

Since advertisement requires large sums of investment, businesses must make sure they 'get it right' from the beginning. The choice of media is an important decision, so businesses should consider the fol...

Answered by Leticia D. • Business Studies tutor

4766 Views

A GCSE is graded out of 140 marks. 1/5 of these marks were given for coursework. The rest were divided between two reading and listening tests, with the marks split in the ratio 3:4 respectively. How many marks were given for the reading test?

140/5 = 28140 - 28 = 1123 + 4 = 7112/7 = 1616 x 3 = 48Answer: 48 (Would go through methods with student: order of thinking, dealing with ratio, long division)

Answered by Will B. • Maths tutor

4006 Views

The equation 5x^2 + px + q = 0, where p and q are constants, has roots t and t+4. Show that p^2 = 20q + 400.

We know that if we have a polinomial of the form ax^2 + bx + c = 0, then:sum of the roots = -b/a and product of the roots = c/a Therefore: t + (t + 4) = -p/5 and t(t + 4) = q/5 Therefore: 2t + 4 = -p...

Answered by Alexandra B. • Maths tutor

4714 Views

Solve the simultaneous equations: 3x+5y=19, 4x-2y=-18

For all simultaneous equations it is useful to number each one to keep your working clear and concise. In order to solve this we need to eliminate one of the variables (x or y) by manipulating the equatio...

Answered by Ben W. • Maths tutor

9301 Views