Let us assume that the power output of the kettle is 2298 Watts. If this kettle...
Let us assume that the power output of the kettle is 2298 Watts. If this kettle is filled with 2.1 Litres of water (Cp = 4.2 kJ/(kg.K), Density = 1000 kg/m3) taken from the tap at 10°C, what is the minimum time required to boil the water (at 100ºC)? Provide your answer to the nearest second (ie. no decimal places).
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Let us assume that the power output of the kettle is 2298 Watts.
If this kettle...
Question 10 - M1 (18 marks) Many people use electric kettles in their houses to boil...
Question 10 - M1 (18 marks) Many people use electric kettles in their houses to boil water (for example to make a cup of tea or coffee) These devices work by passing an electric current through a metal wire. As the electricity passes through the wire, it gets hot and this is the source of heat to boil the water. Consider the Kettle shown in the figure below. The electricity passes through a coiled 'resistance wire' which is housed within...
6. A shell is fired from a gun with a muzzle velocity of 20.0 m's, at...
6. A shell is fired from a gun with a muzzle velocity of 20.0 m's, at an angle of 60.0 with the horizontal. At the top of the trajectory, the shell explodes into two fragments of equal mass. One fragment, whose speed immediately after the explosion is zero, falls vertically. How far from the gun does the other fragment land, assuming that the terrain is level and that the air drag is negligible? (You may use R-(v/g) sin(20) 7. In...
Question 10 - M1 (18 marks) Many people use electric kettles in their houses to boil water (for example to make a cup of tea or coffee) These devices work by passing an electric current through a metal wire. As the electricity passes through the wire, it gets hot and this is the source of heat to boil the water. Consider the Kettle shown in the figure below. The electricity passes through a coiled 'resistance wire' which is housed within...
6. A shell is fired from a gun with a muzzle velocity of 20.0 m's, at an angle of 60.0 with the horizontal. At the top of the trajectory, the shell explodes into two fragments of equal mass. One fragment, whose speed immediately after the explosion is zero, falls vertically. How far from the gun does the other fragment land, assuming that the terrain is level and that the air drag is negligible? (You may use R-(v/g) sin(20) 7. In...
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