The fluid that fills the joint cavity in a diarthrosis is produced by the

Synovial membrane

Explanation:

The joint cavity is filled with synovial fluid, secreted by the synovial membrane (synovium) which lines the inside of the articular capsule. The synovial fluid is the fluid that lubricate the lining of joints and the sheaths of the tendons.

the transfer for conduction is the heat transfering from the liquid to the spoon

the transfer for convection is the heat rising from the liquid to the air

the transfer for radiation is the heat going through the sides of the cup and to the air

at least that is what i would do

acceleration= v2-v1/t so 8m/s-3m/s / 3s =to 8/3 or

2.67 m/s^2

hope i

-lavira: )