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A 2 kW electric fire is switched on for 30 minutes. How many Units of electricity does it use?

Units of electricity are measured in kWh (kilowatt-hours). We have our power in kW (2 kW) We have our time in minutes (30 minutes) Looking at the units, we can see that: kW x minutes = kWminutes (kWm) and kW...
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Answered by Andrew W. • Physics tutor
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How do bacteria acquire resistance to antibiotics?

Spread of mutations via vertical and horizontal transmission Once a bacterium has a mutation that provides resistance to an antibiotic, it can spread through replication or through direct transmission to oth...
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Answered by Hannah L. • Biology tutor
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Given that 346 × 27 = 9342 , work out 34.6 × 2.7

Lets compare the numbers in the question: 34.6 x 2.7 is the same as 346/10 x 27/10 (decimal to fraction) therefore... 34.6 x 2.7 is the same as ( 346 x 27 ) /100 (multiplying top & bottom) so if 346 × 27...
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Answered by Andrew W. • Maths tutor
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Factorise x² + 10x + 16

This is a quadratic equation. When we are asked to facorise a quadratic equation, we should label the 3 parts of it a, b and c. x² + 10x + 16 a b c so a = 1 , b = 10 , c = 16 Now, we need to find two numbers...
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Answered by Andrew W. • Maths tutor
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How do distinguish myself from the rest when applying to medical school?

When it comes to medicine, everyone has done everything. Everyone has the hospital work experience, endless hours of volunteering, perfect grades and all the knowledge about the healthcare system. So why sho...
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