Straighterline PHY250 General Physics I Graded Exam 4 (New Version June 2024)

Question 1 Correct 6.00 points out of 6.00 What is the internal energy of 7.91 x 1022 gas molecules at a temperature of 300 K? Select one: a. 164 J b. 109 J c. 44.2 J d. 492 J Question 2 Correct 6.00 points out of 6.00 Because the energy in SHM alternates between kinetic and potential, at some position x, the kinetic energy must be equal to the potential energy. For the general case, an object undergoing SHM with an amplitude A, which of the following is this position? Select one: a. A 2 b. A A c. √2 d. √2A Straighterline PHY250 General Physics I Graded Exam 4 (New Version June 2024) We are a team of experts offering class attendance for all Straighterline, Online ATI, HESI, NCLEX, Portage Learning, Sophia etc courses (including final proctored exams!!). We also write essays, discussion posts, research papers and school assignments. Should you need any of these services, Contact us via email: or : +1 (540) 753-5914. Guaranteed Passing! PHY250_TW | Chapter 13: Kinetic Theory and Thermodynamics Started on State Finished Completed on Time taken 45 mins 11 secs Grade 144.00 out of 150.00 (96%)Question 4 Correct 6.00 points out of 6.00 Suppose that 10 moles of an ideal gas have a gauge pressure of 2 atm and a temperature of 200 K. If the volume of the gas is doubled and the pressure dropped to a gauge pressure of 1 atm, what is the new temperature? Select one: a. 267 K b. 300 K c. 400 K d. 200 K The filament of a light bulb has a temperature of 2580oC and radiates 60 W of power at a room temperature of 20oC. The emissivity of the filament is 0.36. What is the surface area of the filament? Select one: a. 0.44 cm2 b. 0.62 cm2 c. 0.74 cm2 d. 0.91 cm2 e. 0.144 cm2 Question 3 Correct 6.00 points out of 6.00Question 6 Correct 6.00 points out of 6.00 An ideal gas is maintained at a constant pressure of 70,000 Pa during an isobaric process and its volume decreases by 0.2 m3. What work is done by the system on its environment? Select one: a. 14,000 J b. 350,000 J c. -14,000 J d. -35,000 J Two waves are traveling side by side on two parallel ropes. Both waves are described by the function y (x, t) = 1.52 cos(0.38x + 1.41t). If the mass densities of the two ropes are 0.036 kg /m and 0.120 kg /m, what is the difference in their tensions? Select one: a. 0.0061 N b. 0.31 N c. 0.34 N d. 1.2 N Question 5 Correct 6.00 points out of 6.00Two speakers emit sinusoidal sound waves with equal amplitudes and slightly different frequencies, resulting in beats. This graph illustrates the resulting sound’s slowly-varying envelope of oscillation. Suppose the volume on one of the speakers is turned down slightly. Which of the following graphs illustrates the new envelope? The scale in all of the graphs is the same. Select one: a. b. Question 7 Correct 6.00 points out of 6.00Question 8 Correct 6.00 points out of 6.00 Which of the following best describes the relationship between two systems in thermal equilibrium? Select one: a. Both have the same amount of heat. b. The volumes are equal. c. The masses are equal. d. Both systems have zero velocity. e. None of these c. d.Question 10 Correct 6.00 points out of 6.00 If the pressure of gas is doubled and its absolute temperature is quadrupled, the volume is what factor times the original? Select one: a. 2 b. 1/2 c. 1/4 d. 4 Question 11 Correct 6.00 points out of 6.00 When rod 1 is heated by an amount ΔT, its length increases by ΔL. If rod 2, which is twice as long as rod 1, is heated by the same amount, its length increases by how much? Select one: a. ΔL b. 2ΔL c. ΔL/2 A 0.400 kg iron horseshoe that is initially at 500oC is dropped into a bucket containing 20 kg of water at 22oC. What is the final equilibrium temperature? Neglect any heat transfer to or from the surroundings. The specific heat of iron is 452 J/(kg Co). Select one: a. 23.0oC b. 24.5oC c. 21.5oC d. 26.0oC Question 9 Correct 6.00 points out of 6.00Question 13 Correct 6.00 points out of 6.00 If A is the amplitude of a mass on an oscillating spring, then in one period the mass travels a distance of . Select one: a. 0 b. A c. 2A d. 4A Question 14 Correct 6.00 points out of 6.00 What is the outside temperature if 16 x 106 J of heat is lost through a 2.00 m2 pane of 0.250 cm thick glass (kglass = 0.840 W/(m K) ) in 45 min from a house kept at 21.8oC? Select one: a. 0oC b. 4oC c. 13oC d. 24oC e. 28oC What happens to a given mass of water when it is cooled from 8oC to 4oC? Select one: a. It contracts. b. It expands. c. It vaporizes. d. It does not expand, vaporize, or contract. Question 12 Correct 6.00 points out of 6.00Question 16 Correct 6.00 points out of 6.00 Suppose a damping force Fd = −bv, where v is the velocity, is applied to an oscillatory system. Which of the following is the unit of the coefficient b? Select one: a. N (newton) b. kg /s c. m /s d. kg /m Question 17 Correct 6.00 points out of 6.00 Two sinusoidal waves of amplitude 5.71 m and frequency 2.5 Hz are traveling in the same direction on the same rope. If they are 17∘out of phase, what is the amplitude of the resting wave? Select one: a. 11 m b. 5.5 m c. 6.9 m d. 9.2 m A heat engine operates in a Carnot cycle between 80oC and 350oC. It receives 21,000 J of energy per cycle from the hot reservoir. The duration of each cycle is 1.00 s. What is the mechanical power of this engine? Select one: a. 21 kW b. 910 kW c. 9.10 kW d. 120 kW Question 15 Correct 6.00 points out of 6.00Question 19 Correct 6.00 points out of 6.00 The pressure in a tank of nitrogen is 1.75 x 107 Pa at 20oC. If the nitrogen occupies 30 m3 at 1 atm and 20oC, find the volume of the tank. Select one: a. 0.174 m3 b. 0.287 m3 c. 0.304 m3 d. 0.356 m3 Question 20 Correct 6.00 points out of 6.00 What is the efficiency of a Carnot engine operating between 100oC and 0oC? Select one: a. 7% b. 15% c. 27% d. 51% The Ideal Gas law is given by which equation? (n is the number of moles of the gas) Select one: a. P = nRT b. PV = nRT c. PT = nRV d. PV=RT Question 18 Incorrect 0.00 points out of 6.00Question 22 Correct 6.00 points out of 6.00 An oscillating mass is connected to a horizontal spring with a spring constant k. The force that the spring exerts on the mass is described by . Select one: a. −kx b. +kx c. 1 kx2 2 d. kx + mg Question 23 Correct 6.00 points out of 6.00 The natural direction of the net heat flow between two reservoirs depends on . Select one: a. their temperatures b. their internal energy contents c. their pressures d. whether they are in the solid, liquid, or gaseous state The exhaust temperature of a Carnot heat engine is 573 K. What is the intake temperature if the efficiency of the engine is 30%? Select one: a. 756 K b. 819 K c. 711 K d. 923 K Question 21 Correct 6.00 points out of 6.00Question 25 Correct 6.00 points out of 6.00 A large circular loop of a rope of radius R and linear mass density μ is rotating in deep space at a constant angular velocity. The linear speed of any piece of the rope is v. If a wave is created on this rope, what speed does it travel at, relative to the rope? Select one: a. v b.√v2 R c.√ √ v2 Rμ d. v2 2R Quiz navigation 1 2 3 4 5 6 7 8 9 10 Show one page at a time Finish review Of the following substances, the one that requires the greatest amount of heat per kilogram for a given increase in temperature is . Select one: a. ice b. water c. steam d. copper Question 24 Correct 6.00 points out of 6.00© 2023 StraighterLine. All rights reserved