Top answers

Explain how vaccination makes a person immune to a disease

Answer: A dead or inactive or weak form of pathogen is introduced. (Don't say Germ)This stimulates white cells / lymphocytes / leucocytes - B and T cells (not phagocytes)to produce antibodies. Antibodies are...
BJ
Answered by Bethan J. • Biology tutor
5152 Views

Explain why Hitler and the Nazi Party rose to power in 1933

Hitler’s rise to power at the beginning of the 1930’s can be attributed to the Nazi party’s ability to manipulate the German social, economic and political conditions of the previous decade. The Nazis were a...
JS
Answered by Jordan S. • History tutor
4143 Views

Solve the simultaneous equations 5x + y = 21, x - 3y = 9

To solve, begin by multiplying both sides of the first equation by 3. This will make the coefficients of y in each equation an equal value of 3. With 15x + 3y = 63 and x -3y = 9, we can now simply add the eq...
EB
Answered by Ellie B. • Maths tutor
4899 Views

The equation of the line L1 is y = 3x – 2 The equation of the line L2 is 3y – 9x + 5 = 0 Show that these two lines are parallel.

Two lines are parallel if they have the same gradient. This can be found by looking at the coefficient of x. When the equation is written in the form y=ax+b, with b a constant, the gradient of the line would...
JS
2436 Views

Calculate the charge that flows past a point in a circuit with a 5.0A current for five minutes.

A coulomb the amount of charge that passes in 1 second when the current is 1 ampere.Q = It t = 5 x 60 = 300 (s) we must use Si units in physics hence the conversion to seconds here. Q = 5 x 300 Q = 1500 (C)
ST
Answered by Steffan T. • Physics tutor
6307 Views