Search our library of homework questions

Top answers

All subjects

All levels

An object of mass 3kg is held at rest on a rough plane. The plane is inclined at 30º to the horizontal and has a coefficient of friction of 0.2. The object is released, what acceleration does the object move with?

We need to use Newtons law F=ma going down the slope.
We can see that the only forces acting in this direction are the component of the weight and friction, so we have that: F = Wsin30 - μR = 3a

Answered by Asha D. • Maths tutor

3536 Views

Describe how a stationary wave is formed at a boundary?

A stationary wave is a wave formed by the superposition of two progressive waves. These waves must have equal amplitude frequency and speed. They must also be travelling in opposite directions. When a wav...

Answered by Oliver E. • Physics tutor

5863 Views

Describe how action potentials are initiated and transmitted within a neurone, mentioning the appropriate ions and types of ion channels

A stimulus causes a small influx of sodium ions into the cell, leading the cell to become more depolarised or more positive. If this reaches the threshold potential, of about -55 mV, then it will initiate...

Answered by Roxanne M. • Biology tutor

2937 Views

Compare the use of setting by Attwood in The Handmaid's Tale and Orwell in 1984.

Both "The Handmaid's Tale" and "1984" are dystopian novels set in the near-future. The characters in each novel are subject to extreme supervision and control by the governments in pow...

Answered by Bronte C. • English Literature tutor

5939 Views

How do I prepare for an Imperial College London Medical School Interview?

The interview is a 15 minute panel interview with 4 or 5 interviewers.They will ask the generic questions of why you want to study medicine and why you want to come to this specific university - so make s...

Answered by William W. • Medical School Preparation tutor

3461 Views