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How can you distinguish between an endothermic reaction and an exothermic reaction based on temperature change of the surroundings.

In an exothermic reaction, energy is released from the system and into the surroundings, the system loses energy so the surroundings gain energy. The surroundings gain energy as heat and therefore there is a...
KS
Answered by Kuba S. • Chemistry tutor
13895 Views

Evaluate the use of laboratory research in psychology, providing examples from core studies (4).

One strength of using laboratories is that they are highly controlled environments. For example, in Milgram's study into obedience to authority, the behaviour of the experimenter can be controlled, by having...
CS
Answered by Clea S. • Psychology tutor
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Draw the following inequality on a graph: x^2+4x+1<-2

First we must ensure the equation is in a form that is easy for us to plot!This means we equate the quadratic to 0 by shifting the -2 to the other side. We do this by adding +2 to both sides.Now, we draw the...
SA
Answered by Saad A. • Maths tutor
3779 Views

two connected triangles in an overall shape ABCD, find length AD

Use cosine rule to find the length of BD then use this with the sine rule to find length AD, will be more obvious with the diagram on the whiteboard.
JK
Answered by Jack K. • Maths tutor
3412 Views

A cuboid has edge 7 centimetres, 5 centimetres and a total surface area of 142 centimetres squared. A larger, similar cuboid has a shortest edge of 12 centimetres. Find the third edge of the smaller cuboid and the volume of the larger cuboid.

Let's call the length of the third edge &quot;Y&quot; so we have edges of 7cm, 5cm and Ycm.There are 6 faces but opposite faces are the same, so there are 3 pairs of faces which are 5cm by 7cm, 5cm by Ycm an...
OR
Answered by Ollie R. • Maths tutor
5826 Views