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A glass thermometer has a mass of 38 g and reads 18°C. It is then fully immersed in 140 g of hot water and allowed to come to thermal equilibrium. Its temperature now reads 38°C.
(a) Find the amount of energy Qg absorbed by the glass thermometer during this temperature increase. [Treat the thermometer as entirely made of glass with a specific heat cg= 840 J/kg/K.]
(b) Assuming no energy is lost to the environment, use conservation of energy to write down a number for the energy lost by the water Qw. Then use the usual equation to show that the initial temperature of the water must have been about 39.1°C or 312.1 K. Assume that the specific heat of water is 4186 J/kg/K.
Between 1911 and 1990, the top of the leaning bell tower at Pisa, Italy, moved toward the south at an average rate of 1.2 mm/y. The tower is 55 m tall. In radians per second, what is the average angular speed of the tower's top about its base?
A boat whose speed in still water is 8 m/s, is directed across a river with a current of 6.0m/s. What is the speed of the boat as it crosses the river?
Imagine you are the marketing manager for a professional sport team and you get a phone call from a company that wants to produce versions of its electronic.
a frictionless pulley has the shape of a uniform solid disk of mass 5.00kg and radius 25.0cm . a 2.20kg stone is
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The same pendulum takes 3.64s to complete one full oscillation on lo, one of Jupiter's moons. Calculate the gravitational acceleration on lo.
a pipe open at both ends has a fundamental frequency of 380 hz when the temperature is 0degc.a what is the length of
bernoullis equation only yields perfect predictions if the following conditions existi- the liquid is inviscid that is
Consider the record throws for the javelin, men 98.48 m (Zelezny, 1996, 0.800 kg) and women 72.28 m (Spotakova, 2008, 0.600 kg); discus, men 74.08 m (Schult, 1986, 2.00 kg) and women 76.80 m (Rensch, 1989, 1.00 kg); and shotput, men 23.12 m (Barne..
Suppose that the dipole moment associated with an iron atom of an iron bar is 2.4 x 10-23 J/T. What is the dipole moment of the bar
When an object is 15.5cm from a lens, an image is formed 14cm. from the lens on the same side as the object. Is it erect or inverted
The website didn't mention anything about the charge or capacitance of the defibrillator. Let me know what those values are.
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