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Give an account of a recent holiday. Give details and your opinion of the holiday.

Pendant mes vacances, je suis allée en Espagne avec ma famille. L’hôtel était magnifique, tout au bord de la mer, et chaque jour j’ai nagé avec mon frère avant de faire la sieste. J'ai adoré la vacance et j’...
KR
Answered by Katie R. • French tutor
2818 Views

What is meant by cognitive dissonace?

A good example is smoking. Most people know that smoking is bad for their health, however, they still smoke. This separation between beliefs and behaviour is cognitive dissonance. It is often described as me...
HN
Answered by Hannah N. • Psychology tutor
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A ball, dropped vertically, falls d metres in t seconds. d is directly proportional to the square of t. The ball drops 45 metres in the first 3 seconds. How far does the ball drop in the next 7 seconds?

If d is directly proportional to the square of t, we write this as d= kt 2 , where k = the proportionality constant which we must find. Substitute in the values given in the question into our equation to get...
KL
Answered by Katie L. • Maths tutor
22865 Views

The rectangular hyperbola H has parametric equations: x = 4t, y = 4/t where t is not = 0. The points P and Q on this hyperbola have parameters t = 1/4 and t = 2 respectively. The line l passes through the origin O and is perpendicular to the line PQ.

This question asks us to find the cartesian equation of l. First we must find the points P and Q. To do this we substitute t with 1/4 to find P and substitute t with 2 to find Q.Doing this we get the coordin...
LB
4112 Views

A curve has parametric equations x= 2sin(t) , y= cos(2t) + 2sin(t) for -1/2 π≤t≤ 1/2π , show that dy/dx = - 2sin(t)+ 1

A parametric equation is where both x and y are expressed separately, in terms of a parameter (t). In order to differentiate them we must use the chain rule, which here would be dy/dx= dy/dt ÷ dx/dt. The dif...
KL
Answered by Katie L. • Maths tutor
15795 Views