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Two trains are heading in opposite directions on the same track. Train X has a mass of 16000kg and a speed of 2.8m/s. Train Y has a mass of 12000kg and a speed of 3.1m/s. At what speed do the joined trains move off together immediately after the collison?

Remembering that if the velocities are in different directions they have different signs:Total momentum before=Total momentum afterMomentum=mass x velocityTotal momentum before= (16000x2.8)+(12000x(-3.1))...

Answered by Carys J. • Physics tutor

1640 Views

Suggest how a wood mouse maintains a constant body temperature when in a cold environment?

Thermoreceptors in the skin and hypothalamus detect low temperature and send impulses to the heat gain centre inthe thermoregulatory center in the hypothalamus. This heat gain centre sends out impulses to...

Answered by Akshi S. • Biology tutor

3160 Views

z = 5 - 3i Find z^2 in a form of a + bi, where a and b are real constants

z^2 = (5-3i) = 25 - 30i + 9i^2Since i^2 = -1 => z^2 = 16-30i

Answered by Adam M. • Maths tutor

2977 Views

Sustainable approaches to coastal management will become more important than traditional approaches in dealing with the impacts of climate change.

The key to the question is coastal management in the future in response to impacts of climate change (highlighting the possible future impacts: sea level rise and changing weather events). AQA defines “ha...

Answered by Rebecca S. • Geography tutor

10893 Views

How successful was Edward IV’s management of finance?

Edward IV was ultimately successful in his management of finances, as he died solvent. However, this essay must consider Edward’s failure in consolidating power during his first reign as he was deposed in...

Answered by Miranda C. • History tutor

10920 Views