1.The resistance of a thermistor over a limited range of temperature is given
the equation R=(T-203 C ) where c is a constant and T is the absolute
by
temperature. What will be the temperature on the Celsius scale of the thermistor at absolute
temperature of T = 300K?
2. A woman finds a front windshield of a car covered with ice at -12°C. The ice has a thickness of 4.5 x 10 mm and the windshield area is 125mm². The
density of the ice is 917kg/m³. How much heat is required to melt the ice? [S. H.C of ice = 2200J/kg/K, Li -3.3x10 J/kg].
3. An electric heater of power 2kW is used to heat 0.8kg of water in a container
of heat capacity 300J/K. If the water is initially at 18°C, how long will it take to
heat it to the boiling point of 100°C? What mass of water will have boiled awa
in 4 minutes?
[S. H.C of water = 4200J/kg/K, Lv = 2.3X10 J/kg]
4. Explain anomalous expansion of water.
5. Steel railway tracks are laid at 8°C. What size of expansion gap are needed 10m long rail sections if the ambient temperature varies from-10°C to 50°C?
[Linear expansivity of steel = 12 x 10 K¹]
Answers: 3
Physics, 21.06.2019 16:30, ineedhelpireallydo
In which scenario is the least amount of work done on a crate? a force of 120 n moves it 25 m. a force of 115 n moves it 26 m. a force of 130 n moves it 22 m. a force of 125 n moves it 27 m.
Answers: 1
Physics, 22.06.2019 04:30, MadisonUpky9652
Which of the following are not typically included in the periodic table? a. atomic mass b. element symbol c. isotopes d. number of electrons
Answers: 2
Physics, 22.06.2019 06:30, jumpman2344
The coulomb's law explains which of the following? select all the force between two charged objects is inversely proportional to the charge on each object. the force between two charged objects is directly proportional to the charge on each object. the force between two charged objects is directly proportional to the distance separating them. the force between two charged objects is inversely proportional to the square of the distance separat coulomb's law is similar to newton's 2nd law. if the force between two objects is f and the charge on both objects is doubled, the new force between the would now be 2f. if the force between two objects is 2f and the distance separating them is doubled, the new force between the objects would now o the be zf.
Answers: 3
1.The resistance of a thermistor over a limited range of temperature is given
the equation R=(T-203...
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