Top answers

Describe the basic principles of ultrasound imaging (2 marks)

Ultrasound is any frequency above that of human hearing - around 20 kilohertz . Ultrasound imaging works by emitting a known intensity of ultrasound at a specific frequency, and capturing the reflected sound...
AG
Answered by Alex G. • Physics tutor
3265 Views

Respiration and photosynthesis-what are the similarities and differences?

Respiration in both animals and plants Photosynthesis only in plants Will explain further in interview
AA
Answered by Abuzar A. • Biology tutor
3261 Views

(x + 2)(x + 3)(x + 6)

First: (x + 2)(x + 3) = x 2 + 5x + 6 Second: (x 2 + 5x + 6)(x + 6) = x 3 + 5x 2 + 6x + 6x 2 + 30x + 36 = x 3 + 11x 2 + 36x +36 Answer: = x 3 + 11x 2 + 36x +36
UC
Answered by Urma C. • Maths tutor
3569 Views

Describe how the velocity and forces acting on a skydiver change during their fall (6 marks)

Different exam boards may want a different format of answer, so before beginning this question, it would be worth thinking how other six mark questions are marked in other papers. Edexcel want the student to...
JR
Answered by Jethro R. • Physics tutor
15902 Views

Expand and simplify 3(x-2) -2(x+2)

Notice that the questions specifies that you should expand and simplify. This means expanding the equations is a good idea. To expand the equation, we will start by expanding each brackets. 3(x-2)-2(x+2) =3x...
PP
Answered by Phrances P. • Maths tutor
8341 Views