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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 that t...
MT
Answered by Mai T. • Maths tutor
4595 Views

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 (divide ...
OR
Answered by Oliver R. • Maths tutor
3456 Views

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
NG
Answered by Nayan G. • Maths tutor
3133 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 we can find...
AH
Answered by Alister H. • Maths tutor
5767 Views

calculate the volume and surface area of a beach ball with a 30cm diameter.

surface area 1.13m^2volume 0.11 m^3
OM
Answered by Olivia M. • Maths tutor
3005 Views