An aluminum electric tea kettle has a mass of 500 g. It has a 500-W heating coil. How long will it take to heat up 1.0 kg of water from 18°C to 98°C in the tea kettle? The specific heat of aluminum is 900 J/(kg•K)
A) 5 minutes
B) 7 minutes
C) 12 minutes
D) 15 minutes
E) 18 minutes
C
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Total internal reflection
A. Accounts for the brilliance of cut diamonds. B. Allows light to travel in a curved path inside an optic fiber. C. All of these are true. D. Occurs when light strikes an interface at greater than the critical angle.
In a certain region, the electric potential due to a charge distribution is given by the equation V(x,y) = 2xy - x2 - y, where x and y are measured in meters and V is in volts
At which point is the electric field equal to zero? A) x = 0.5 m, y = 0.5 m B) x = 0 m, y = 0 m C) x = 1 m, y = 0.5 m D) x = 1 m, y = 1 m E) x = 0.5 m, y = 1 m
Two long parallel wires separated by 4.0 mm each carry a current of 24 A. These two currents are in the same direction. What is the magnitude of the magnetic field at a point that is between the two wires and 1.0 mm from one of the two wires?
A. 4.8 mT B. 6.4 mT C. 3.2 mT D. 9.6 mT E. 5.3 mT
On Venus, the Coronae are volcanic features
Indicate whether the statement is true or false