Recent content by slingboi

Homework Statement A coffee machine in a café passes steam at 100°C into 0.18kg of cold coffee (s.h.c. the same as that of water(4200j/kg/K)) to warm it. If the initial temperature of the coffee is 14°C, what mass of steam must be supplied to raise the temperature of the coffee to 85°C Homework...

I've been studying waves and diffraction has come up, I'd just like to know, why is it that diffraction is most significant when the size of a gap a wave passes through is similar to the wave length?

I have a physics exam soon and i would just like to know, which method would be best for me to use to estimate the area under a curve to estimate work done when the force-extension graph is not linear. I know you could draw bars to estimate the area of the curve and you could draw a line so...

Ohhh, thanks! i get it now!

I have tried it and the units end up being Nm^-2 (the unit of stress) however the unit for joules is Nm.

30 degrees, oh I see now so would the force N 30(degrees) E be 20cos(30)?

north = 20Cos(60) = 10 east = 20Sin(60) = 17.3 What could (c) be, does N 30(degrees) E become the hypotenuse?

A force P is 20N in a direction N 60(degrees) E. What is the resolved part of the force (a) north (b) east (c) N 30(degrees) E I have an idea of what to do for a and b but can you please show me your working aswell, thanks