Last minute study uwu

Question 1

When talking about forces what is Sin used for

Answer 1

Any Y direction forces all data

Question 2

When talking about forces what is cos used for

Answer 2

Any X direction forces

Question 3

What are the requirements for equillibrium?

Answer 3

i) Net forces acting on the body must be 0

ii) Net torque acting on the body about the point of pivot must be zero

Question 4

Equilibrium of torque

Answer 4

tbc

Question 5

Carnot Engine

Answer 5

Theoretical thermodynamic cycle. The perfect energy machine
uses 4 stages of different temperatures to move a piston providing an output of work. It uses both cold and warmer temperatures to do this with no gain in entropy (entropy is loss of energy or useless energy)

Question 6

Carnot energy efficiency is in what si unit

Answer 6

no units. HAH trick question

Question 7

nC to C

Answer 7

1x10^-9C=1nC

Question 8

um to metres

Answer 8

1um = 1x10^-6m

Question 8

um to metres

Answer 8

1um = 1x10^-6m

Question 9

Direction of electrical field lines

Answer 9

positive goes to negative. positive out negative in

Question 10

uC to C

Answer 10

1uc = 1x 10^-6C

Question 11

Torque formula

Answer 11

Tsin0xdsin0=mgxd/2cos0+tcos20*dcos0