An ideal heat-engine is to be used in an environment where the ambient temperature is 25.0 °C. What should be the minimum temperature of the hot heat reservoir in order to reach at least 36.6 percent efficiency with the heat-engine? (Give your answer in Celsius.) 541.4
Q: Find the total change in the internal energy of a gas that is subjected to the following two-step…
A: Given:- A gas is subjected to the following two-step process. The first step of the gas is made to…
Q: 1. Suppose you have two infinite straight-line charges λ, a distance d apart, moving along at a…
A: 1. The magnetic force between two parallel carrying conductors is Fl=μoI1I22πd FA…
Q: 8. A machine gun is attached to a railroad flatcar, at rest, that can roll with negligible friction.…
A:
Q: Two long parallel wires are 12 cm apart. If one carries a current of +3.2 A, and the other +1.8 A,…
A:
Q: A vertical spring stretches 4.4 cm when a 16-g object is hung from it. The object is replaced with a…
A: Given: The stretching in the spring due to a mass of 16 g is 4.4 cm. The replaced mass is 30 g.
Q: A man can see no farther than 55.8 cm without corrective eyeglasses. (a) Is the man nearsighted or…
A: Given data The image distance is given as v = - 55.8 cm. a) As it is given in the question that…
Q: If the distance between the Earth and the Moon were 5 times farther apart, the gravitational force…
A: Consider the initial distance between the Earth and the Moon is r.
Q: a small piece of putty of mass m₁ is Inc fired with velocity v₁; at a stationary wooden block of…
A:
Q: A beam of light is incident from air on the surface of a liquid. If the angle of incidence is 41.5°…
A: Given data The angle of incidence is given as θi=41.5°. The angle of reflection is given as θr=25°.…
Q: Let's assume a perfectly elastic collision between a golf club (mass of 250 gr) and a golf ball…
A:
Q: Three capacitors, with capacitances C1 = 4.0 micro-Farad, C2 = 3.0 micro-Farad, and C3 = 2.0…
A:
Q: A point charge q₁ = +3.50 nC is located on the y-axis at y₁ = +3.00 cm (x₁ = 0) and a second point…
A: Given:point charge at x1, y1 =0 , 0.03 is, q1 = +3.50 nCpoint charge at x2, y2 = 0,−0.03 is, q2 =…
Q: A particle is subject to the following velocity: Ux 122.0t 0.2t³ over a time period of t = [0,10]…
A: “Since you have posted a question with multiple sub parts, we will provide the solution only to the…
Q: Danielle is pushing her twin Daniel on a swing that hangs from a tree branch by 2.0 m long ropes.…
A: The length of the rope is given as L=2 m
Q: Speed lang. A certain material has a dielectric permittivity and magnetic permeability 7μo. 3 2 An…
A:
Q: b. Estimate the value for the instantaneous rate of change of s(t) at t = 10 s c. What physical…
A:
Q: A block on a spring obeys simple harmonic motion according to the equation: y(t) = (6.0cm) cos…
A:
Q: What is the speed of a cheetah if it travels 300 meters in 50 seconds? Be sure to show your work and…
A: Given data: Distance (d) = 300 m Time (t) = 50 s Required: The speed (v)
Q: The ammonia molecule can be treated as a symmetric rigid rotator, with its 3 hydrogen atoms lying in…
A: The ammonia molecule can be treated as a symmetric rigid rotator, with its 3 hydrogen atoms lying in…
Q: The vertical cross-section of a pipe with flowing water is shown in the diagram. The gauge pressure…
A:
Q: Charges 5 µC and 10 μC are placed 1 m apart. Work done to bring these charges at a distance 0.5 m…
A: Given:- Two charges are:- q1 = 5μC q2 = 10 μC The separation distance between them is r = 1 m.…
Q: 10) What is the resistance of a copper bus-bar as used in the power distribution panel of a…
A:
Q: A galaxy like the ones we examined in lab has an inherent size of 22 kpc. If it's apparent angular…
A: Given that A galaxy like the ones we examined in lab has an inherent size of (s) =22 kpc We know…
Q: As shown above, two beams of laser light are shown onto two different pieces of plastic. The two…
A: Given data- wavelength λ=600 nm out the phase=2.5 m piece 1, index of refraction μ1=1.4 thickness…
Q: An incompressible ideal fluid flows steadily through a pipe that has a change in diameter. The fluid…
A: Here D1 = 12.8 cm V1 = 1.09 m/s Also , D2 = 5 cm
Q: A sphere moves in simple harmonic motion with a frequency of 1.20 Hz and an amplitude of 5.20 cm.…
A:
Q: The emf frequency in the figure (Figure 1)is 7.00 kHz. You may want to review (Pages 911 - 913).…
A:
Q: Suppose one of the Global Positioning System satellites has a speed of 4.26 km/s at perigee and a…
A: Given Data Speed of the satellite at perigee vp=4.26 km/s Speed of the satellite at apogee va=3.48…
Q: A car moves along a straight road according to the equation a = 18t, where a is in m/s² and t is in…
A: Given value--- a = 18t . v = 1 m/s and x = 2 m at t = 0 . We have to find--- find position of…
Q: d. The resolving power is reduced to 1/4 of its original value. The resolving power does not change…
A: Given value--- refractive index of diamond = 2.41 . incidence angle = 75 degree. We have to…
Q: A 1.10 kg block is attached to a horizontal spring with spring constant 2200 N/m. The block is at…
A: Given,Mass of the block, M = 1.1 kgThe spring constant, k = 2200 N/mMass of the bullet, m = 0.011…
Q: A series AC circuit has resistance R = 3.50 x 102 Q2, inductance L = 0.600H, capacitance C = 3.50…
A: Since you have posted a question with multiple sub-parts, we will solve first three subparts for…
Q: A horozontial force of 125.0 N is applied to move a 46.0-kg cart across a 7.0 m level surface. What…
A:
Q: How does something that operates in milliseconds compare to something that operates in nanoseconds?…
A:
Q: (a) Two perfectly flat glass plates are separated at one end by a piece of paper 0.065 mm thick. A…
A: (a.) Given, Thickness, t=0.065 mm =0.065×10-3m Wavelength is λ=550 nm=550×10-9m We know,…
Q: Sound at 65 dB in a fluid with impedance 615 Rayls is incident on a region of another fluid such…
A: It is given that the acoustic impedance, ZA=615 Raylsthe pressure reflection coefficient R=-0.23 It…
Q: [Q7] Which one of the following sentences is an accurate statement about light? a. b. C. d. f. When…
A: to identify : the accurate statement about light
Q: What is the torque that the person is applying around the minute hand's pivot point? Sub Tries 0/8…
A:
Q: . Look at the circuit to the right. The EMF=25V, L=150mH, R₁=1000, and R₂=500. a. What is the…
A:
Q: (Hint: You might want to use the trigonometric identity sin (20) = 2 sin(0) cos(0).)
A: Given value--- refractive index of polystyrene = 1.49. We have to find--- Find the angle of…
Q: Red light is incident in air on a 30° -60°-90° prism as shown. The incident beam is directed at an…
A: It is required to compare the exit distance for violet light to the exit distance of the red light,…
Q: 3. A parallel-plate, air-gap capacitor has a capacitance of 0.14 UE. The plates are 0.5 apart. a.…
A: Given value--- capacitance = 0.14 micro F. separation between plates = 0.5 mm. We have to find---…
Q: The 40kg and 30kg blocks are attached as shown in the figure below. The length of the rope is…
A: Introduction: By Newton's second law of motion, if an external force is applied on an object then…
Q: A man stands with a weight on his back. If the weight is 400 pounds and he holds it stationary for…
A:
Q: a block of mass m₁ is sliding along a near frictionless surface with initial velocity of V₁; and has…
A: Given:- The block of mass m1 and it elastic collision with the stationary block of mass m2 The…
Q: Photons with a wavelength of 549 nm in air enter a plate of flint glass with index of refraction n =…
A: Given Wavelength of the photons in air is given as λ=549 nm=549×10-9 m Index of refraction of flint…
Q: 7. A 100 kg cannon, at rest, contains a 10 kg cannon ball. When fired, the cannonball leaves the…
A:
Q: Given a Kelvin temperature reading of 235.7 K, the reading on the Fahrenheit scale is
A: Given data, Temperature in Kelvin K=235.7 K
Q: The graph shown is for a dilute gas that follows the clockwise path of quasi-static steps: isobaric…
A: The work done in pV diagram is the area under the pV curve. The vertical axis is shown in multiples…
Q: A 0.72 mm diameter hole is illuminated by infrared light of wavelength 2.5 μm. What is the angle of…
A: Given, Diameter = 0.72 mm Wavelength = 2.5 micrometers We need to find, Angle of the dark fringe =?
Step by step
Solved in 2 steps with 2 images
- Please answer the following question(s): 1. (a) What is the best coefficient of performance for a refrigerator that cools an environment at -28° C and has heat transfer to another environment at 47 ° C? COP ref (b) How much work must be done for a heat transfer of 4186 kJ from the cold environment? W = kj (c) What is the cost of doing this if the work costs 10.0 cents per 3.6 × 106 J (a kilowatt-hour)? Cost in cents = ✓ (d) How many kJ of heat transfer, Qh occurs into the warm environment? Qh= kj Think about what type of refrigerator might operate between these temperatures. Hint: Use the appropriate formula for a refrigerator which is different from a heat pump.Consider a heat engine that uses reservoirs at 800.°C and 0.00 °C. Calculate the maximum possible efficiency (in %).Answer in 3 SigfigsAn electrical power station uses 1.33 1014 J of heat input with an efficiency of 34.7%. (a) How much work is done? (b) How much waste heat is produced by the station? (c) What is the ratio of waste heat to work output?
- 1. (a) What is the best coefficient of performance for a refrigerator that cools an environment at -26° C and has heat transfer to another environment at 49 ° C? COP ref (b) How much work must be done for a heat transfer of 4186 kJ from the cold environment? W = (c) What is the cost of doing this if the work costs 10.0 cents per 3.6 x 106 J (a kilowatt-hour)? Cost in cents = (d) How many kJ of heat transfer, Qh occurs into the warm environment? Qn kj = Think about what type of refrigerator might operate between these temperatures. Hint: Use the appropriate formula for a refrigerator which is different from a heat pump.A 361-W heat pump operates between the ground, whose temperature is 6.2, and the interior of a house at 20.1. What is the theoretical maximum amount of heat per hour that the heat pump can supply to the house? Express your answer in MJ, to at least one digit after the decimal point.A proposed ocean thermal-energy conversion (OTEC) system is a heat engine that would operate between warm water (16°C) at the ocean's surface and cooler water (4°C) 1,247 m below the surface. What is the maximum possible efficiency of the system? 0.75 % Need Help? Read It Watch It
- The input power to operate a boiler comes from an electrical circuit with a voltage of 110 volts [ V ] and a resistance of 3 ohms [ Ω ]. The boiler produces 70 kilojoules of heat per minute [ k J m i n ] . What is the efficiency of the boiler, expressed as a percentage [ % ] ?To produce 96 hp of mechanical power, an automobile engine requires a supply of heat of 4.91 105 J per second from combustion of the fuel. What is the efficiency of this engine?A power plant burns coal and generates an average of 615.0 MW of electrical power while discharging 1020.90 MW as waste heat. Find the total electrical energy generated by the plant in a 30-day period. Submit Answer Tries 0/5 This discussion is closed. Send Feedback
- A large electrical power station generates 1000 MW of electricity with an efficiency of 35.0%. (a) Calculate the heat transfer to the power station, Qh , in one day. (b) How much heat transfer Qc occurs to the environment in one day? (c) If the heat transfer in the cooling towers is from 35.0º C water into the local air mass, which increases in temperature from 18.0º C to 20.0º C , what is the total increase in entropy due to this heat transfer? (d) How much energy becomes unavailable to do work because of this increase in entropy, assuming an 18.0º C lowest temperature? (Part of Qccould be utilized to operate heat engines or for simply heating the surroundings, but it rarely is.)If a heat engine pulls 8330.0 J of heat from the hot reservoir and exhausts 6938.9 J of heat to the cold reservoir, what was the work done by the engine? What is the efficiency of this engine in percent?100 g of water at 0 C (degrees Celsius) is heated to 100 C. Compute its change in entropy.