Imagine you've been walking outside on a cold winter's day. When you arrive home at your studio apartment, you realize that you left a window open and your 5.0 m × 5.0 m × 3.0 m room is only slightly warmer than the outside. You turn on your 1.0-kW space heater right away and wait impatiently for the room to warm up. Part A How long will it be before the heater warms the air in the room by 10 °C? Express your answer in minutes to two significant figures. In this problem, make the following assumptions: • View Available Hint(s) • The entire 1.0 kW = 1.0 × 10³ J/s output of the space heater goes into warming the air in the room. • The air in the room is an ideal gas with five degrees of freedom per particle (three translational degrees of freedom and two rotational degrees of freedom-about right for nitrogen and охудen). • The air in the room is at a constant pressure of 1.00 atm. • At room temperature (22 °C= 295 K) and atmospheric pressure, 1.00 mole of air fills a volume of 24.2 L. time = minutes Submit Request Answer Provide Feedback This is slightly larger than the volume of air at standard temperature and pressure, because room temperature is hotter than 0 °C.

Imagine you've been walking outside on a cold winter's day. When you arrive home at your studio apartment, you realize that you left a window open and your 5.0 m × 5.0 m × 3.0 m room is only slightly warmer than the outside. You turn on your 1.0-kW space heater right away and wait impatiently for the room to warm up. Part A How long will it be before the heater warms the air in the room by 10 °C? Express your answer in minutes to two significant figures. In this problem, make the following assumptions: • View Available Hint(s) • The entire 1.0 kW = 1.0 × 10³ J/s output of the space heater goes into warming the air in the room. • The air in the room is an ideal gas with five degrees of freedom per particle (three translational degrees of freedom and two rotational degrees of freedom-about right for nitrogen and охудen). • The air in the room is at a constant pressure of 1.00 atm. • At room temperature (22 °C= 295 K) and atmospheric pressure, 1.00 mole of air fills a volume of 24.2 L. time = minutes Submit Request Answer Provide Feedback This is slightly larger than the volume of air at standard temperature and pressure, because room temperature is hotter than 0 °C.

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

See similar textbooks

Similar questions

Party Planning You are expecting to serve 34 cups of soft drinks to your guests tonight. Each cup will hold 276 g of a soft drink that has a specific heat of 4186 J/(kg · K) and an initial temperature of 24°C. Part A If each guest would like to enjoy the drink at 3.0 °C, how much ice (in kg) should you buy? Assume the initial temperature of the ice is 0°C, and ignore the heat exchange with the plastic cups and the surroundings. Express your answer to two significant figures and include appropriate units. Templates Symbols undo redo reset keyboard shortcuts help 24.6 kg Submit Previous Answers Request Answer X Incorrect; Try Again; 2 attempts remaining Provide Feedback
A 0.0545 kg chunk of an unknown metal that has been in boiling water for several minutes is quickly dropped into an insulating Styrofoam beaker that contains 0.462 kg of water at room temperature (20.0° C). After waiting for a few minutes, you observe that the water's temperature has reached a constant value of 22.0° C. Part A Assuming that the Styrofoam absorbs a negligibly small amount of heat and that no heat was lost to the surroundings, what is the specific heat of the metal? Express your answer in joules per kilogram-kelvin to three significant figures. ΑΣφ J/(kg · K) C = Submit Request Answer Part B Use the table below to identify the metal. Specific heat (c) Material J/(kg K) cal/(g K) Solids Lead 0.13 x 103 0.031 Mercury 0.14 × 103 0.033 Silver 0.23 × 103 0.056 Copper 0.39 × 10³ 0.093 Iron 0.47 x 103 0.112 Marble (CACO3) 0.88 × 10³ 0.21 Salt 0.88 × 103 0.21 Aluminum 0.91 × 103 0.217 Beryllium 1 97 x 103 0.471
Part A A gas is compressed from 600 cm to 200 cm³ at a constant pressure of 500 kPa. At the same time, 100 J of heat energy is transferred out of the gas. What is the change in thermal energy of the gas during this process? For general problem-solving tips and strategies for this topic, you may want to view a Video Tutor Solution of Fire piston. Express your answer with the appropriate units. μΑ AEth Value J
Electronics and inhabitants of the International Space Station generate a significant amount of thermal energy that the station must get rid of. The only way that the station can exhaust thermal energy is by radiation, which it does using thin, 1.8-m-by-3.6-m panels that have a working temperature of about 6 °C and an emissivity of 0.85. Part A How much power is radiated from each panel? Assume that the panels are in the shade so that the absorbed radiation will be negligible. The temperature of deep space, which the panels face, is close to 0 K. Hint: Don't forget that the panels have two sides! Express your answer with the appropriate units. ► View Available Hint(s) P = Submit μA Value Previous Answers W .... ?
In a container of negligible mass, 0.300 kg of ice at an initial temperature of -25.0°C is mixed with a mass m of water that has an initial temperature of 80.0°C. No heat is lost to the surroundings. Part A If the final temperature of the system is 19.0°C, what is the mass m of the water that was initially at 80.0°C? Express your answer with the appropriate units. m = Submit μA Value Request Answer Units ? Review
5.0 g of nitrogen gas at 20°C and an initial pressure of 2.8 atm undergo a constant-pressure expansion until the volume has tripled. Part C How much heat is transferred to the gas to cause this expansion? Express your answer with the appropriate units. ► View Available Hint(s) Qexp 3000 J Submit Previous Answers ✓ Correct The gas pressure is then decreased at constant volume until the original temperature is reached. Part D What is the gas pressure after the decrease? Express your answer with the appropriate units. View Available Hint(s)
An insulated beaker with negligible mass contains liquid water with a mass of 0.330 kg and a temperature of 60.5 °C. Part A How much ice at a temperature of -18.5 °C must be dropped into the water so that the final temperature of the system will be 40.0 °C? Take the specific heat of liquid water to be 4190 J/kg K, the specific heat of ice to be 2100 J/kg K, and the heat of fusion for water to be 3.34x105 J/kg.
part c
An insulated beaker with negligible mass contains liquid water with a mass of 0.245 kg and a temperature of 66.4 °C. Part A How much ice at a temperature of -17.8 °C must be dropped into the water so that the final temperature of the system will be 34.0°C? Take the specific heat of liquid water to be 4190 J/kg K, the specific heat of ice to be 2100 J/kg-K, and the heat of fusion for water to be 3.34x105 J/kg. View Available Hint(s) mice = [ΨΕΙ ΑΣΦ 5 kg
One end of a 70-cm-long copper rod with a diameter of 2.0 cm is kept at 420 °C, and the other is immersed in water at 24 °C. Part A Calculate the heat conduction rate along the rod. Express your answer to two significant figures and include the appropriate units. t μA = Value Submit Units and Previous Answers Request Answer ?
Question 2
Have you ever chewed on a wintergreen mint in front of a mirror in the dark? If you have, you may have noticed some sparks of light coming out of your mouth as you chewed on the candy; and, without knowing it, you have experienced a physical phenomenon called triboluminescence. In this problem you will analyze some of the key elements of triboluminescence in wintergreen candies. Part C Image that the radiation emitted by the nitrogen at a frequency of 8.88×1014 Hz is absorbed by an electron in a molecule of methyl salicylate. As a result, the electron in the wintergreen oil molecule jumps to an excited state. Before returning to its ground state, the electron drops an intermediate energy level, releasing two-thirds of the energy previously absorbed and emitting a photon. What is the wavelength Xw of the photon emitted by the wintergreen oil molecule? Express your answer in nanometers to three significant figures. ► View Available Hint(s) Aw= Submit [-] ΑΣΦ ? nm