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Describe why diamond is hard and graphite is soft?

Diamond and graphite both only have carbons and have covalent bonding involved.Diamond has a giant covalent lattaice and each carbon atom is bonded to 4 other carbon atoms.Graphite on the other hand...

Answered by Muhammad Saleem R. • Chemistry tutor

64367 Views

If a ball is dropped from 6m above the ground, how long does it take to hit the floor and what is its speed at impact (assuming air resistance is negligible)?

Distance, s = 6m ; initial speed, u = 0 m/s ; final speed, v = v m/s ; acceleration, a = 9.8 m/s (g) ; time, t = t sTime:s = ut + 0.5at² , 6 = 0 + (0.5 x 9.8)t² , 6 = 4.9t²

Answered by Rebecca R. • Maths tutor

4260 Views

Discuss the nature and impacts of one or more volcanic events that you have studied.

In 1991, Mount Pinatubo in the Philippines erupted with huge explosivity, due to a large build up of gas in the magma chamber in the lead up to the eruption. A main primary hazard was the ejection of a hu...

Answered by Rachel P. • Geography tutor

1904 Views

Given ∫4x^3+4e^2x+k intergrated between the bounds of 3 and 0 equals 2(46+e^6). Find k.

Sorry I couldn't write the question properly in the question box. The question should read:Given ∫³₀4x³+4e^2x+k dx = 2(46+e⁶)Find K.Step 1- Intergrate...

Answered by Charlie M. • Maths tutor

5813 Views

How do I compare two sources in an exam answer?

It may seem simple, but the first and most important thing to remember when comparing two sources is not to forget to include some kind of analysis on both of the sources in your answer. Just because one ...

Answered by Elizabeth M. • History tutor

22152 Views