Un cubo de Al de 2cm de longitud por lado tiene una masa de 21 g cual es su densidad y cual sera la masa de 5.5cm/3 ​

The key to stability is feedback between the reservoir and the fluxes into and/or out of the reservoir. assume that the rate of outflow from a reservoir depends on the size of the reservoir according to the following relationship: outflow rate= k x (size of reservoir), where k is a constant. a reservoir of water has a volume of 5000 liters, and the rate of outflow at steady state is 25 liters per minute. what is k? (give both the numerical value and its units.) what is the residence time? what is the relationship between k and the residence time?

Blank liquids and gases exert a buoyant force on objects placed in them

For the car in the picture ,in which direction is the normal force? -into the screen -down -out of the screen -up