How much heat is released when 3Kg of water freezes?



Find the coefficient of performance of a heat pump that keeps your home at 22C when it is 15C outside.



A 3Kg dead fish extends a spring scale by 4cm.  Find the "k" value of the spring.



I hear a deafening 110 decibel noise.  How many w/m² is that?


How much attraction is there between two oppositely charged .0008 Coulomb objects when placed 1cm apart?



There are two possible ways to wire a circuit with two 10 ohm resistors.  How are the resistances of these circuits different?



If the primary coil of a transformer (the one that gets plugged into the 110volt wall outlet has X turns, and the secondary (which goes to the appliance) has 2X turns, then what is the voltage of the appliance?



Light enters a glass prism at an angle of 30 degrees from normal.  At what angle does the light move in the glass?



How much energy could you get if you could turn a 16 pound bowling ball into pure energy?


If you start out with 10000 atoms of the element Mockium (half life = 4 days), how many atoms will be radioactive in 14 days?



How much energy is contained in a single photon of orange light?  ( wavelength = 605E^-9m)