Search our library of homework questions

Top answers

All subjects

All levels

How many baths of paint does it take to cover 10km of road markings?

10 km = 10000mAssuming 2 (x_m) markings (depending on the students knowledge of roads) on either side of road each marking 10cm (w_m) wideeach marking with a paint thickness of 5mm (t_m) each marking 10km...

Answered by Muhammad S. • Oxbridge Preparation tutor

1608 Views

Name and explain the three types of isomerism present in organic compounds.

There are three types of isomerism:1) Structural isomerism - Occurs when compounds which have the same molecular formula (eg. C4H9Br1) but have different atomic arrangements. Eg. CH2Br-CH2-CH2-CH3CH3-CHBr...

Answered by Jonny M. • Chemistry tutor

3059 Views

When solving a trigonometric equation, like sin(x) = -1/3 for 0 ≤ x < 2π, why do I get an answer outside the range? Why are there many correct answers for the value of x?

Drawing the graphs of the trigonometric functions sin, cos & tan, we can see that they all extend along the x-axis to infinity. Indeed, the sin & cos functions move between 1 and -1 on the y-axis,...

Answered by Alexandra G. • Maths tutor

9112 Views

Describe the three main types of bonding?

Ionic bonding - occurs between a metal an a none metal. Electrons are transferred between two atoms to form ions - atoms with either a positive or negative charge. Ionic bonding occurs because of th...

Answered by Katherine M. • Chemistry tutor

9837 Views

How do you solve a simultaneous equation by 'substitution'?

Firstly, demonstrate with an example: Solve: 3x + y = -9 and x² + 2x - 3 = yRearrange the first equation to get "y" by itself by moving parts of the equation to the other side e.g. y ...

Answered by Sophie H. • Maths tutor

3090 Views