Bundle: Foundations of Astronomy, Enhanced, Loose-Leaf Version, 13th + MindTap Astronomy, 2 terms (12 months) Printed Access Card
13th Edition
ISBN: 9781337214353
Author: Seeds, Michael A., Backman, Dana
Publisher: Cengage Learning
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Chapter 4, Problem 1DQ
To determine
Why length, money and temperature are not measured in the scale of base 2.
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A picture window has dimensions of 1.25 m by 2.6 m and is made of glass 7.5 mm thick. On a winter day, the outside temperature is 22° C while the inside temperature is a comfortable at 19° C. (k of glass =0.075W/m.K) Calculate the following:a) the area of the window in square metres
A window has dimensions of 1.65 m by 2.4 m and is
made of glass 5.25 mm thick. On a winter day, the
outside temperature is 22° C while the inside
temperature is a comfortable at 17° C. (k of glass
=0.085W/m.K) (1.5+1.5+2 = 5marks)
Calculate the following:
a) the area of the window in square metres
b) the temperature gradient (AT/Ax)in
kelvin/metre
c) the rate of heat lost through the window by
conduction in watts
A thermometer is taken from a room where the temperature is 18°C to the outdoors, where the temperature is 2°C. After one
minute the thermometer reads 13°C.
(a) What will the reading on the thermometer be after 4 more minutes?
3.83
(b) When will the thermometer read 3°C?
5.01
minutes after it was taken to the outdoors.
Chapter 4 Solutions
Bundle: Foundations of Astronomy, Enhanced, Loose-Leaf Version, 13th + MindTap Astronomy, 2 terms (12 months) Printed Access Card
Ch. 4 - Prob. 1RQCh. 4 - Why did early human cultures observe astronomical...Ch. 4 - Prob. 3RQCh. 4 - Name one example each of a famous politician,...Ch. 4 - Why did Plato propose that all heavenly motion was...Ch. 4 - On what did Plato base his knowledge? Was it...Ch. 4 - Which two-dimensional (2D) and three-dimensional...Ch. 4 - Are the spheres of Eudoxus a scientific model? If...Ch. 4 - In Ptolemys model, how do the epicycles of Mercury...Ch. 4 - Prob. 10RQ
Ch. 4 - In Ptolemys model, which of the followingepicycle,...Ch. 4 - Why did Copernicus have to keep small epicycles in...Ch. 4 - Was the belief held by ancient astronomers that...Ch. 4 - When Tycho observed the new star of 1572, he could...Ch. 4 - Prob. 15RQCh. 4 - Does Tychos model of the Universe explain the...Ch. 4 - Name an empirical law. Why is it considered...Ch. 4 - How does Keplers first law of planetary motion...Ch. 4 - When Mercury is at aphelion (farthest from the...Ch. 4 - Prob. 20RQCh. 4 - What is P for Earth? What is a for Earth? Do these...Ch. 4 - Based Figure 4-13c, do planets with larger a take...Ch. 4 - How did the Alfonsine Tables, the Prutenic Tables,...Ch. 4 - Explain how each of Galileos telescopic...Ch. 4 - How did discovery of the Galilean moons disprove...Ch. 4 - Prob. 26RQCh. 4 - How Do We Know? Describe the differences between a...Ch. 4 - Prob. 1DQCh. 4 - Prob. 2DQCh. 4 - Prob. 3DQCh. 4 - Prob. 4DQCh. 4 - Prob. 5DQCh. 4 - Draw and label a diagram of the western horizon...Ch. 4 - If you lived on Mars, which planets would exhibit...Ch. 4 - How long does it take for one retrograde cycle of...Ch. 4 - If a planet has an average distance from the Sun...Ch. 4 - If a space probe is sent into an orbit around the...Ch. 4 - Uranus orbits the Sun with a period of 84.0 years....Ch. 4 - Prob. 7PCh. 4 - One planet is three times farther from the Sun...Ch. 4 - Galileos telescope showed him that Venus has a...Ch. 4 - Which is the phase of Venus when it is closest?...Ch. 4 - Galileos telescopes were not of high quality by...Ch. 4 - Prob. 1LTLCh. 4 - Study Figures 4-11 and 4-16 and describe the...Ch. 4 - What three astronomical objects are represented...Ch. 4 - Use the figure below to explain how the Ptolemaic...
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- A roast turkey is taken from an oven when its temperature has reached 185°F and is placed on a table in a room where the temperature is 75°F. (Round your answers to the nearest whole number.) (a) If the temperature of the turkey is 150°F after half an hour, what is the temperature after 50 minutes? T(50) = °F (b) When will the turkey have cooled to 100°? t = minarrow_forwardA metal cube is dropped into a tank of water, the temperature of which is held at 17°. The initial temperature of the cube is 70°, and after 10 minutes the temperature of the cube has dropped to 35°. Assume that Newton's law of cooling applies. (i) Write down the differential equation for the temperature of the cube, T(t). (ii) What will the temperature of the cube be after 55 minutes? (iii) Will the temperature of the cube ever reach 9°? Justify your answer. (iv) What is the initial rate of change of the temperature of the cube?arrow_forwardAccording to the Ideal Gas Law, PV = kT, where P is pressure, V is volume, T is temperature (in kelvins), and k is a constant of proportionality. A tank contains 400 cubic inches of nitrogen at a pressure of 130 pounds per square inch and a temperature of 300 K. (a) Determine k.k = (b) Write P as a function of V and T and describe the level curves.P = (c) Setting P = c, the level curves are of the form V =arrow_forward
- This exercise uses Newton's Law of Cooling. A roasted turkey is taken from an oven when its temperature has reached 185°F and is placed on a table in a room where the temperature is 71°F. (a) If the temperature of the turkey is 150°F after half an hour, what is its temperature after 45 min? (Round your answer to the nearest whole number.) oF (b) After how many hours will the turkey cool to 100°F? (Round your answer to one decimal place.) hr thneted be 0.0it 心)arrow_forwardThe ideal gas law describes the state of a hypothetical ideal gas, i.e., PV = nRT where P is the pressure in Pascal, V is the volume in liters L, R is the ideal gas constant, T is the temperature in kelvin K, and n is the amount of substance. Suppose a researcher has n = 0.654 moles of neon gas. He observed that T and V are increasing at rates of 3 K/min and 2 L/min, respectively, using the fixed gas constant R= 8.31 J/K.mol, find the rate at which the pressure is changing when V = 12.3 L and T = 447K.arrow_forwardProblem 5: Any ideal gas at standard temperature and pressure (STP) has a number density (atoms per unit volume) of p = N/V = 2.68 × 1025 m²3. How many atoms are there in 11 cubic micrometers, at STP? N =| atomsarrow_forward
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