An aluminium sphere with a mass of 4.2 kg and an initial temperature of 250°C is placed in a closed, thermally Isolated container with 30 kg water water - 4 185kg 1.c '). Determine the final/equilibrium temperature if the initial temperature of the water is 14 C.
A. 20.9°C
B. 132.0°C
C. 6.7°C
D. 26.3°C

What happens when a rubber rod is rubbed with a piece of fur?

A1500 w electric heater is plugged into the outlet of a 120 v circuit that has a 20 a circuit breaker. you plug an electric hair dryer into the same outlet. the hair dryer has power settings of 600 w, 900 w , 1200 w, and 1500 w. you start with the hair dryer on the 600 w setting and increase the power setting until the circuit breaker trips. under what setting does the circuit breaker trip.

Why should the wavelength scale of spectroscope be calibrated