A water heater with a maximum power output of 650W is used to increase the temperature of water for 15 minutes. What is the temperature increase in Celsius if the water has a mass of 5kg? Round-off your answer to the nearest whole number. Do not type the unit of your final answer. *
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- An object was left in a room of unknown surrounding temperature. The temperature of the object was summarized below with respect to the time t (in minutes) the object was initially observed. Predict and complete the information, i.e. determine the temperature in Celsius when t = 30 minutes. Put your answer accurate up to four decimal places. No need to put in the units of measurement. When t = 0, the temperature of the object is 30 degrees Celsius. When t = 10 minutes, the temperature of the object is 32 degrees Celsius. When t = 20 minutes, the temperature of the object is 33.6 degrees Celsius. When t = 30 minutes, the temperature of the object is unknown. Assume the system obeys Newton’s Law of Cooling and the surrounding temperature of the room did not change.QUESTION 8 This problem is concerned with the same situation as the previous problem. A piece of unknown material weighs 0.4 kg. It is heated to 70 °C, then transferred into a 2 kg bath of oil at 20 °C. The bath temperature eventually reaches 40 °C. Assuming that Cmaterial = 0.6 kJ/(kg-K), calculate the specific heat of the oil in kJ/(kg-K). Do not include units in your answer and write the numerical value in normal form. QUESTION 9 During the video on heat conduction, H through a single pane window was calculated. Now, consider a indow thet hoc twe nenos with a 6 mm airgan between iaem Each nane has an area of 19 m2 TheQUESTION 25 The temperature at state A is 20°C, that is 293 K. What is the heat (Q) for process A to D, in MJ (MegaJoules)? (Hint: What is the change in thermal energy and work done by the gas for this process?) Your answer needs to have 2 significant figures, including the negative sign in your answer if needed. Do not include the positive sign if the answer is positive. No unit is needed in your answer, it is already given in the question statement. p (atm) 5 4 3 2 1 O A D 1 1 2 3 4 B I 5 → V (m³)
- An arctic weather balloon is filled with 1.56L of helium gas inside a prep shed. The temperature inside the shed is 11.°C. The balloon is then taken outside, where the temperature is 2.°C. Calculate the new volume of the balloon.You may assume the pressure on the balloon stays constant at exactly 1atm. Round your answer to 3 significant digits.An unknown metal is heated and placed in a beaker of room temperature water. After a few seconds, the temperature of the water is raised from 20.0°C to 55.0°C. If 3.50 x 103 J of thermal energy is absorbed by the water, calculate the mass of water in grams. Record your rounded three-digit numeric response in the blank space below. Mass of water (g): A/ Note: Do not include units in your answer. conThe density of mercury is 13,600 kg/m³ at 0°C. What is the density of mercury at 200° C? Express your answer to three significant figures and include the appropriate units. HA p = Value Units Submit Request Answer Provide Feedback t
- Pump some air into the container and hold the volume constant.Heat the gas using the heater under the container. temperature(K) pressure(kPa) 400 800 500 1000 600 1200 700 1400 800 1600 900 1800 1)Plot a graph of Pressure vs temperature and attached the graph below (show the data points and label the axes) 2)find the “molar density” of the gas in the container. (unit of answer: mole/m3)(Hint: consider the ideal gas law , the graph should be ??=??? a straight line, you can use the slope of the graph to find the answer. Pay attention to the unit. R=ideal gas constant=8.314 JK-1mol-1=8.314 m3PaK-1mol-1) Include the appropriate units in the physical quantities.(with steps)A person consumes about 2700 Cal a day. 1 Cal = 4186 J, and 1 kWh = 860 Cal. Part A What is this energy in joules? (2 sig figs) Part B What is this energy in kilowatt-hours? (2 sig figs) Part C If a power company charges about 10 ¢ per kilowatt-hour, how much would this energy cost per day if the person bought it from the power company? (2 sig figs)The temperature at state A is 20°C, that is 293 K. What is the heat (Q) for process A to D, in MJ (MegaJoules)? (Hint: What is the change in thermal energy and work done by the gas for this process?) Your answer needs to have 2 significant figures, including the negative sign in your answer if needed. Do not include the positive sign if the answer is positive. No unit is needed in your answer, it is already given in the question statement. p (atm) 5 A D + V (m³) 1 2 3 4 5
- -80J of work are done on the gas in the process shown in (Figure 1). Figure p (kPa) P₁- 0 0 100 200 300 1 of 1 V (cm³) Part A What is p₁ in kPa? Express your answer in kilopascals. P1 = Submit IVE ΑΣΦ Provide Feedback Previous Answers Request Answer ? kPaIf 251.4 kJ of heat is needed to increase the absolute temperature of a 3-kg body of water by twice its initial temperature, what is the initial temperature of the water? * Your answer must be in Kelvin. Do not include the unit. Express the numerical value as a whole number. Use c = 4190 J/kg K Your answerThe temperature at state A is 20°C, that is 293 K. What is the heat (Q) for process D to B, in MJ (MegaJoules)? (Hint: What is the change in thermal energy and work done by the gas for this process?) Your answer needs to have 2 significant figures, including the negative sign in your answer if needed. Do not include the positive sign if the answer is positive. No unit is needed in your answer, it is already given in the question statement. p (atm) 4 3 2 -> +V (m) 5