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How does vaccination make a person immune to a disease?

An inactive or weak form of the pathogen is introduced to the patient. This stimulates the production of lymphocytes which then produce antibodies against the antigen. Memory cells are also generated. If the...
YA
3002 Views

A student runs an experiment to decompose hydrogen peroxide to produce oxygen and water. Increasing the temperature of hydrogen peroxide increases the rate of reaction. Explain why.

When the hydrogen peroxide is heated, the particles have more energy so move faster. This means that they will collide more often, increasing the likelihood of successful collisions. More successful collisio...
YA
9411 Views

∫ (ln(x)/(x*(1+ln(x))^2) dx

use u = 1+ln(x) as the substitution du/dx = 1/xdx = x du ∫ (ln(x)/(x*(1+ln(x))^2) dx = ∫ ((u-1) x/ x (u^2)) du = ∫ (u-1)/(u^2) du
JB
Answered by Jack B. • Maths tutor
8476 Views

What is the immediate future tense and why is it different to the future tense?

The immediate future tense translates as 'going to...'. It describes an action that is about to take place in the near future, so you can use it for events likely to happen soon/immediately. By contrast, the...
KW
Answered by Kate W. • Spanish tutor
4281 Views

Explain why an outsider perspective might give a different sense of place to an insider perspective.

A place can be defined in terms of a location, a locale, and a sense of place. Sense of place refers to the meanings we ascribe to a particular place. These meanings come from our own personal experience and...
TF
Answered by TJ F. • Geography tutor
17345 Views