Top answers

State two reasons why corrugated cardboard is used as packaging for cooked pizzas.

Strength to weight ratio so easy to carry but can support pizza2) Low cost in comparison to other packaging so is cost effective for cheap pizzasExtras:3) Can be printed on so businesses can display logos an...
CK
5911 Views

Name 3 features of plant root cells and how they allow the cells to absorb ions from the soil

Many mitochondria - production of ATP during aerobic respiration which allows active transport to take place for uptake of ions Many root hairs - Increases surface area for maximum diffusion Large store of s...
CD
Answered by Caroline D. • Biology tutor
3036 Views

How do I form the imperfect?

The imperfect tense is used for ongoing actions (e.g. was doing) or actions done regularly in the past (e.g. used to do). It is formed by taking the endings off a verb to form its "stem". For -ar v...
ZA
Answered by Zain A. • Spanish tutor
1982 Views

Explain why a smoke alarm works by emitting and detecting alpha radiation instead of gamma or beta radiation.

Alpha radiation isn't very penetrating and so is absorbed and stopped by smoke particles. This causes a change in count rate when there is smoke present. This change in count rate allows the alarm to be trig...
FM
Answered by Fin M. • Physics tutor
12121 Views

Prove that the square of an odd number is always 1 more than a multiple of 4

In order to prove this we can write a general expression of an odd number in terms of n, e.g - 2n+1Square this 'odd number': (2n+1)^2, therefore you can write it as (2n+1)(2n+1), then expand (multiply out) t...
BH
Answered by Ben H. • Maths tutor
3566 Views