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Do particles expand when heated?

When an object is solid, the particles have little energy and are closely packed together. When you heat an object, the particles gain energy and begin to move more frequently and randomly. This means tha...

Answered by Mai T. • Maths tutor

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3A + 4B =32 6A-2B=14 work out the values of A and B

First we need to get either an equal number of As, an opposite number of As. An equal number of Bs or an opposite number of Bs. 6A-2B= 14 (Multiply by 2) 12A-4B =28 and 3A +4B =32 add together15A=60 (divi...

Answered by Oliver R. • Maths tutor

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There are 12 counters in a bag. 1/2 are red, 1/3 of the remaining counters are blue. The rest are green. How many counters are green?

1/2 of 12 is 6 - 6 red counters. 6 remaining counters. 1/3 of 6 is 2 - 2 blue counters. 4 remaining counters - 4 green counters

Answered by Nayan G. • Maths tutor

1881 Views

A race across America is 3096.25 miles. Juan knows from a previous race that his average speed is 15.12 miles per hour. If he cycles for 8 hours per day, how many days will it take him to finish the race?

Firstly we should get the answer distance Juan can cover per day. We know Distance = Speed * Time so the distance per day = 15.12 miles per hour * 8 hours = 120.96 miles per day.Once we know this...

Answered by Alister H. • Maths tutor

3933 Views