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4) Electrical current is passed through a resistor immersed in a liquid in an adiabatic container....
1.. An alternating current, when passed through a resistor immersed in water for 5 min, just...
1.. An alternating current, when passed through a resistor immersed in water for 5 min, just raised the temperature of the water to boiling point. When a direct current of 4 A was passed through the same resistor under identical conditions, it took 8 min to boil the water. Find the r.m.s. value of the alternating current. Neglect factors other than heat given to the water. If a rectifier type of ammeter connected in series with the resistor read 5.2...
A heavy-duty electrical resistor is 2cm in diameter by 16cm long. 5 amps of current through...
A heavy-duty electrical resistor is 2cm in diameter by 16cm long. 5 amps of current through it heats the resistor to 100°C, and produces 6 volts across its terminals. Assuming the room air is at 20°C and radiation is negligible, what is the convective heat transfer coefficient?
10 Amps of DC current is passed through a 10 OHM resistor in thermal contact with...
10 Amps of DC current is passed through a 10 OHM resistor in thermal contact with an 6 g block of Arbitrarium. The temperature of the block is raised by 6 K by this process. What is the specific heat of Arbitrarium? Units J/gK
A hot plate consists of a flat electrical resistor, which is adiabatically insulated on one side...
A hot plate consists of a flat electrical resistor, which is adiabatically insulated on one side and on the other side is in contact with a ceramic layer of 1 cm thickness and 30 W/mK thermal conductivity. The hot plate is operated inside a fume hood, where air at 20 C flows over producing convective cooling on the top surface of the heater with a heat transfer coefficient of 15 W/mK The plate generate a total heat transfer rate of...
A liquid (NOT WATER) is passed through a tube with a square cross section of 0.01m...
A liquid (NOT WATER) is passed through a tube with a square cross section of 0.01m x 0.01m at a Reynolds number of 2,000. The liquid has a Prandtl number of 1, a thermal conductivity of 0.2 W/mK, and a heat capacity of 4,000 J/kg*K. Simultaneously, air is blown at a speed of 20 m/s and a temperature of 25°C over the outside of the tube such that the flow is perpendicular to one of the square sides. The liquid...
4) A container has 7.0 kg of water in it. If 263.0 k] of heat is...
4) A container has 7.0 kg of water in it. If 263.0 k] of heat is added to the system and it does 94.0 kJ of 4) work on its surroundings, how much does its temperature change? (The specific heat of water is 4184 J/kg K.) A) 5.8 K B) 0.16 K C) 0.0058 K D) 170 K
Show you work. All answers should be given with two decimal places. 1. A current of...
Show you work. All answers should be given with two decimal places. 1. A current of 3.33 mA (IMA -0.001A) passes through a resistor which is at a temperature 22.3 °C. As a result, a voltage of 3.00 Volts is generated across the resistor. Calculate the resistance of the resistor in k 2. Rrom 2. Now the same resistor as in question 1 is immersed in liquid nitrogen (T--195.8 °C). The voltage across the resistor is still 3.00V but the...
(a) Thermal energy is supplied continuously to a material initially in the solid state till it...
(a) Thermal energy is supplied continuously to a material initially in the solid state till it reaches well into the gaseous state. With the help of a schematic diagram discuss the change in temperature with the addition of thermal energy in the form of heat. 9 marks) (b) For a thermodynamic system explain what is meant by isothermal process, adiabatic process, and cyclic process. If the system consists of an ideal gas, state the relationship between internal energy, heat and...
please answer all 3 questions 2) What is the connection between current through a resistor, Voltage...
please answer all 3 questions
2) What is the connection between current through a resistor, Voltage difference across a resistor, and the resistance of that resistor? 3) What does the symbolin the circuit diagrams mean? During lab, your group measures R measurement in the form X- 9.724556 Ω and δR-0.064322 Ω. Properly report this 6x following all rounding rules 4)
1) 150 g of a liquid at 45°C is filled in an insulated metal container at...
1) 150 g of a liquid at 45°C is filled in an insulated metal container at 35°C whose mass is 110 g. The system eventually reaches an equilibrium. Find: (a) the final equilibrium temperature, and (b) estimate total change in entropy of the system (i.e. metal container plus liquid). Specific heat of liquid is 4186 J/kg.Cº and specific heat of metal is 900 J/kg.C. 2) A Carnot engine working between a hot and cool reservoir, extracts 800 J from a...
A heavy-duty electrical resistor is 2cm in diameter by 16cm long. 5 amps of current through it heats the resistor to 100°C, and produces 6 volts across its terminals. Assuming the room air is at 20°C and radiation is negligible, what is the convective heat transfer coefficient?
A liquid (NOT WATER) is passed through a tube with a square cross section of 0.01m x 0.01m at a Reynolds number of 2,000. The liquid has a Prandtl number of 1, a thermal conductivity of 0.2 W/mK, and a heat capacity of 4,000 J/kg*K. Simultaneously, air is blown at a speed of 20 m/s and a temperature of 25°C over the outside of the tube such that the flow is perpendicular to one of the square sides. The liquid...
4) A container has 7.0 kg of water in it. If 263.0 k] of heat is added to the system and it does 94.0 kJ of 4) work on its surroundings, how much does its temperature change? (The specific heat of water is 4184 J/kg K.) A) 5.8 K B) 0.16 K C) 0.0058 K D) 170 K
Show you work. All answers should be given with two decimal places. 1. A current of 3.33 mA (IMA -0.001A) passes through a resistor which is at a temperature 22.3 °C. As a result, a voltage of 3.00 Volts is generated across the resistor. Calculate the resistance of the resistor in k 2. Rrom 2. Now the same resistor as in question 1 is immersed in liquid nitrogen (T--195.8 °C). The voltage across the resistor is still 3.00V but the...
(a) Thermal energy is supplied continuously to a material initially in the solid state till it reaches well into the gaseous state. With the help of a schematic diagram discuss the change in temperature with the addition of thermal energy in the form of heat. 9 marks) (b) For a thermodynamic system explain what is meant by isothermal process, adiabatic process, and cyclic process. If the system consists of an ideal gas, state the relationship between internal energy, heat and...
please answer all 3 questions
2) What is the connection between current through a resistor, Voltage difference across a resistor, and the resistance of that resistor? 3) What does the symbolin the circuit diagrams mean? During lab, your group measures R measurement in the form X- 9.724556 Ω and δR-0.064322 Ω. Properly report this 6x following all rounding rules 4)
1) 150 g of a liquid at 45°C is filled in an insulated metal container at 35°C whose mass is 110 g. The system eventually reaches an equilibrium. Find: (a) the final equilibrium temperature, and (b) estimate total change in entropy of the system (i.e. metal container plus liquid). Specific heat of liquid is 4186 J/kg.Cº and specific heat of metal is 900 J/kg.C. 2) A Carnot engine working between a hot and cool reservoir, extracts 800 J from a...
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