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How do I solve a simple simultaneous equation?

Simultaneous equations pop up all the time in maths, science, and engineering, so being able to solve them is really useful. Although they can look a bit daunting at first, the same general rules apply to so...
JM
Answered by Joe M. • Maths tutor
5467 Views

Trolley A weighs 5kg and is moving at 15m/s to the right. It collides with a stationary Trolley B, weighing 10kg more than Trolley A. After the collision they move off together. Calulate the velocity that they move off with.

To start with, we should work out all of the quantities we need: Mass of Trolley A: M A = 5kg Mass of Trolley B: B weighs 10kg more than A --> Therefore M B = 10 + 5 = 15kg Mass of Both Trolleys together:...
JD
Answered by Joshua D. • Physics tutor
8309 Views

Describe the four moraine landforms found in glacial environments.

'Moraine' is a term given to pieces of rock transported by a glacier, and can my divided into four different categories. 'Ground Moraine' is a collection of rock dragged underneath a glacier as it moves down...
CB
Answered by Calum B. • Geography tutor
5604 Views

How do you form the imperfect tense in Spanish?

The imperfect tense is used in Spanish to describe something in the past or to talk about something that happened often or habitually, for example going to school every day. It has two different types of end...
DM
Answered by Danielle M. • Spanish tutor
4658 Views

When do you use avoir and when do you use être in the past tense?

Most verbs use avoir, but there are a specific group of verbs that take être as their auxiliary verb in not just the past tense, but in all of the compound tenses (such as the pluperfect tense). A nice way t...
DM
Answered by Danielle M. • French tutor
3929 Views