Figure 5 shows an electric urm used to boil water 5
3 600 W
The urn contains water at a temperature of 21°C. It is switched on for 50 minutes
(a
Calculate the energy supplied to the kettle by the electricity supply​

How do we measure or think of speed in the united states?

At a certain instant after jumping from the airplane a, a skydiver b is in the position shown and has reached a terminal (constant) speed vb = 52 m/s. the airplane has the same constant speed va = 52 m/s, and after a period of level flight is just beginning to follow the circular path shown of radius ρa = 2330 m. (a) determine the velocity and acceleration of the airplane relative to the skydiver. (b) determine the time rate of change of the speed vr of the airplane and the radius of curvature ρr of its path, both as observed by the nonrotating skydiver.

In general what determines whether atoms will form chemical bonds?