Top answers

Why does ionisation energy increase across a period?

As you go across the period, the nuclear charge (or number of protons increase) but the shielding (or the number of shells) stays the same as all of the elements are on the same period. This causes the nucle...
AP
Answered by Anjali P. • Chemistry tutor
2613 Views

Solve the quadratic equation 4x^2 - 5x -6 = 0

First factorise the equation : you need to find two value which multiply to give (4 x -6) = -24 and add to equal -5,these two numbers are -8 and 3. Then write the equation as follows:4x 2 - 8x +3x - 6 =0 We ...
KS
Answered by Katie S. • Maths tutor
8993 Views

What is the difference between these two sentences, and which one is correct: 1) La gente quiere que haya más agua. 2) La gente quieren que hay más agua.

This question tests the student's knowledge of the use of singular and plural pronouns, as well as the subjunctive. La gente (the people) is singular, so should be followed by a singular verb, as seen in sen...
DD
Answered by David D. • Spanish tutor
4526 Views

Integrate ln(x) with respect to x.

Here we can use integration by parts. Notice that ln(x) can be written as ln(x) 1, so we can integrate 1 and differentiate ln(x). Then using the formula int(u v') dx = uv - int(u' v) dx, we find that the int...
TW
4538 Views

What is an enzyme?

Protein.Catalyst.Not used up in the process.An enzyme is a protein which acts as a catalyst to speeds up a reaction but is not used up in the process.
AL
Answered by Alexander L. • Biology tutor
3087 Views