2. What is the amount of heat released when 0.8 kg of water at 25°C cools until it becomes ice at -6°C? State the assumptions make in your calculations. [Specific heat capacity of water, Cwater = 4.2 x 103 J kg 1 °C-?, specific heat capacity of ice, Cice = 2.0 x 103 J kg-1 °C -1 and specific latent heat of fusion of ice, le = 3.34 x 105 J kg '] ​

When a resistor with resistance r is connected to a 1.50-v flashlight battery, the resistor consumes 0.0625 w of electrical power. (throughout, assume that each battery has negligible internal resistance.) what power does the resistor consume if it is connected to a 12.6-v car battery? assume that r remains constant when the power consumption changes.

The substances that are necessary for producing of certain hormones and that store and transport vitamins

You hang a book bag on a spring scale and place the bag on a platform scale so that the platform scale reads 23.7n and the spring scale reads 13.8n. what is the magnitude of the force that earth exerts on the bag?