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Do particles expand when heated?

When an object is solid, the particles have little energy and are closely packed together. When you heat an object, the particles gain energy and begin to move more frequently and randomly. This means tha...

Answered by Mai T. • Maths tutor

2632 Views

Solve the following simultaneous equations: y - 2x = 6 and y + 2x = 0

Firstly, label each of our equations: y - 2x = 6 (1) y + 2x = 0 (2)Then we can rearrange (2) to get the following: y = -2x (3)Then, substitute (3) into (1): -2x - 2x = 6Which yields the result: -4x = 6The...

Answered by Ciara C. • Maths tutor

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Why/how do plants both respire and photosynthesise?

First of all, respiration is not breathing. Respiration is combining oxygen and glucose to form energy (ATP) with carbon dioxide as a waste product. All living things respire in order to obtain energy to ...

Answered by Mai T. • Biology tutor

3921 Views

Suppose we have a circle with the equation x^2 +y^2 =25. What is the equation to the tangent to the circle at point (4,3)?

Firstly lets draw it out-Draw a line from the origin to the point. calculate the change in y over change in x =(3-0)/(4-0)=3/4Take negative reciprocal which is equal to m. Then do y-y₁=m(x-x

Answered by Nayan M. • Maths tutor

2653 Views

Explain the impacts of rural to Urban migration in an urban area

Rural to urban migration is the process whereby people move form the countryside into cities and urban areas, often due to a range of pull and push factors. The impacts to an urban area can be negative. F...

Answered by Melissa G. • Geography tutor

4346 Views