what happens if (ideally) there is zero demand for money?

Thread is clear and thanks to Professor Lecturer

Clear and thanks to God

how do changes in the rate of interest affect aggregate demand?

What is fiscal and monetary policy.

Monetary and Fiscal policies are ways the Government stabilize the economy.Monetary policy involves printing electronic money which causes the Government to buy debt and so the demand curve shifts to the right. Fiscal policy involves Government demanding more goods and services from the economy. It can either spend taxes or borrow money by selling treasury bonds.

It's a very clear and understanding course, thanks for that