A body at a temperature of 50°F is placed outdoors where the temperature is 100°F. If after 5 minutes the temperature of the body is 60°F, find (a) how long it will take the body temperature to reach a temperature of 75°F and (b) the temperature of the body after 20 minutes.

A body at a temperature of 50°F is placed outdoors where the temperature is 100°F. If after 5 minutes the temperature of the body is 60°F, find (a) how long it will take the body temperature to reach a temperature of 75°F and (b) the temperature of the body after 20 minutes.

Refrigeration and Air Conditioning Technology (MindTap Course List)

8th Edition

ISBN:9781305578296

Author:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Publisher:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Chapter2: Matter And Energy

Section: Chapter Questions

Problem 17RQ: At a constant pressure, how does a volume of gas vary with respect to the absolute temperature?

See similar textbooks

Related questions

Q: A system of coplanar and non concurrent forces are acting on a beam. If the sum of the forces acting…

A: Given, A system of coplanar , non-concurrent force acts on the beam The sum of the supports…

Q: 2. In a two dimensional incompressible fluid flow, the velocity components are given by: u=(x-4y)…

Q: 6. Find the reaction forces at point A and B 20 lb 30 lb/ft A B 10' 10'

Q: Bar AB has an angular velocity AB = 9 rad/s. (Figure 1) Figure AB 200 mm 0=45° 500 mm 30⁰ 4 < 1 of 1…

Q: A 1450 N sphere is resting in a trough as shown in Figure. Determine the reactions developed at…

Q: The hydraulic cylinder shown in the figure below, with a 3.2-in.-diameter piston, is advertised as…

Q: Locate centroid axis for the given shaded area. * 6 in.- 6 in. 3 in. 6 in. 6 in. Add file

A: Centroid, also called as center of area of any body is the point at which the whole area of the…

Q: The wood beam in (Figure 1) is subjected to a load of P = 15 kN. Grains of wood in the beam at point…

Q: A hollow steel shaft, 500 mm outside diameter and 300 mm inside diameter, has a coupling 80 mm thick…

A: Given data: Outside diameter of hollow shaft = 500 mm Inside diameter of hollow…

Q: A block of mass 1kg is placed on turntable rotating with constant angular velocity o about O. The…

A: SOL : → On rotation , free body diagram of block∴ w = v r ; r - string length = 1m .⇒ Eqn . of…

Q: Find the magnitude and direction of the resultant force for the system of forces shown in the…

Q: Find the magnitude and direction of the resultant for system of forces shown in the figure. Take F1=…

Q: C2 (ii). A sinusoidal waveform is displayed on a C.R.O. screen, the time/cm switch is on 20 µs/cm…

Q: Calculate the centroid for the shaded portion of the figure as shown. Take a = 115 mm, b=55 mm, c =…

Q: 4. Consider steady flow of water through an axisymmetric garden hose nozzle (see Fig). Along the…

A: Given is Flow is a steady flow Flow is an axisymmetric flow Fluid is incompressible Centreline…

Q: Calculate the blade length of a wind turbine rotor which produces a maximum power of 4 MW at a wind…

Q: In a lathe machine tool, when the cutting tool moves perpendicular to the axis of rotation of the…

A: True

Q: 2-Water flows from A, where the diameter D= 30 cm, to B, Where diameter D= 60 cm at the rate Q=0.375…

Q: +In case of CNC machine with high dynamics such as feed rate what type most appropriate? A.…

A: Given: In the case of a CNC machine with high dynamics such as feed rate what type of control is…

Q: The following data are obtained from a tensile test of a copper specimen. - The load at the yield…

A: Stress: When a component or a part is subjected to any external force, the resisting force will be…

Q: 15. A bead slides without friction on a wire which is rotating with angular velocity, o in the force…

A: Data given-

Q: In a power plant, water (density = 1000 kg, is pumped from 80 kPa to 3 MPa. The pump has an…

A: Given data; The density of water is ρ = 1000 kg/m3. The initial pressure is P1 = 80 kPa. The final…

Q: A member is loaded with force system as shown in figure. Find the Moment about A, B,C.D and E Where…

A: Given Data: The given forces are F1=80 N, F2=40 N, F3=10 N, F4=20 N and F5=40 N The value of CD=45…

Q: Determine the total compression of a bar made up of three circular cross-sections as shown in Fig.…

Q: A 3-m internal diameter spherical tank made of 2-cm-thick stainless steel (k = 15 W/m °C) is used to…

A: The emissivity of the black surface is 1. The value of the Stefan-Boltzmann constant is 5.67×10-8…

Q: Find the magnitude and direction of the resultant force for the system of forces shown in the…

A: Consider the given diagram for the system. Resolve the forces along horizontal and vertical…

Q: The figure consists of four forces. a. If F3 = 20 kN and 0 = 15°, determine the magnitude and…

A: As per given question F1=50 KN F2=30KN F3=20KN F4=25 KN WE have to determine magnitude and…

Q: ergoes a process in whicl same time interval, 220 J ot it

Q: Identify the wrong statement in the following options.

A: option-A this statement is correct because standard helps the consumer to mantain the quality as…

Q: An oil flows through a 45 m long, and 15 cm diameter pipe at a velocity of 1.0 m/s. FIND head loss…

A: To find: The value of head loss due to friction. Given: The value of length of pipe, L=45 m. The…

Q: Q.4. A) Draw cooling curve for water during solidification B) Draw cooling curve for copper during…

A: Cooling curve for water during solidification:

Q: A mild steel specimen of Diameter 9 mm, Length 16 cm is subjected to tensile load and it is found…

Q: Example A 5-hp fan is used in a large room to provide for air circulation. Assuming a…

Q: Work on the following problems to familiarize yourself with the general properties of fluids. To…

A: Given data: Diameter f the tube, d = 1.6 mm d =…

Q: 120 kN 50 kN/m 4 m 1m 8 m 2 m

A: Calculate the support reaction as follows, RA+RB=120+50×5RA+RB=370 kN .......... (1)Taking…

Q: The 46-lb load is hoisted by the pulley system and motor M. The motor exerts a constant force of 32…

A: As per given question W=46lb F=32lb S=10ft Efficiency =0.71 We have to find determine power…

Concept explainers

Thermodynamic Relations

Thermodynamics is the division of physics that deals with the transfer of any kind of energy, whether it be heat, temperature, or work, from one object to another.

Question

Please solve fast.

A body at a temperature of 50°F is placed outdoors where the temperature is 100°F.
If after 5 minutes the temperature of the body is 60°F, find (a) how long it will take the
body temperature to reach a temperature of 75°F and (b) the temperature of the
body after 20 minutes.

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

SEE SOLUTION Check out a sample Q&A here

Step 1

VIEW

Step 2

VIEW

Step by step

Solved in 2 steps with 2 images

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, mechanical-engineering and related others by exploring similar questions and additional content below.

Similar questions

A temperature of a body is measured to be 26°C. Determine the temperature in °R.
If the temperature of a cake is 300°F when it leaves the oven and is 200°F 10 minutes later, when will it be practically equal to the room temperature of 61°F. See Newton's Law of Colling in Lesson 3.
applications of DE a body at a temperature of 200F is placed in room at a constant temperature of 10F. If after 20 min the temperature of the body is 50F, A. Determine the temperature of the body at any time t and its temperature at t = 0.75hr. B. Find the time it will take for the body to reach a temperature of 25F.
A glass is cleaned in hot water and reaches a temperature of 50°C. The glass is placed on a table bottom up. The room temperature air trapped in the glass heats up to 46°C, and some of the air escapes, so that the resulting pressure in the glass is 2kPa higher than the ambient pressure of 100kPa. The weight of the glass now seals the volume. The glass and air are let to cool to 20°C. What is the pressure inside the glass?
A 10m³ rigid closed cylinder contains a gas with temperature of 100 deg.C and pressure of 300kPa. 50 Joules of heat is added to the system. Determine the change of internal energy of the gas in the system.
The temperature of the lubricating oil in an automobile engine is measured as 150°F. What is the temperature of this oil in °C?
Please solve this carefully
2. 3 mol of air are contained in a piston-cylinder system with a surface of S = 5 m², loaded with a spring. The piston-cylinder system lies in a vertical plane, such that gravity acts on the piston. The initial pressure and temperature of the system are 25 kPa and 750 K, respectively. In the initial condition, the spring is unstretched. Heat is transferred from the air in the cylinder, which is cooled down to 200 K. In this quasi-static process, the volume is reduced to a third of the original one, stretching the spring. At the end of the cooling process, the spring snaps and the piston falls down, compressing the gas. This transformation happens fast, so that no heat is exchanged, but the transformation is non-quasi static. The end state of this compression is an equilibrium, with a volume equal to 85% of its value at the end of the quasi-static cooling process. Find: i) the heat that is transferred from the air within the cylinder during the quasi-static cooling, before the snapping…
2-: Consider a house with a floor space of 200 m2 and an average height of 3 m at sea level, where the standard atmospheric pressure is 101.3 kPa. Initially the house is at a uniform temperature of 10°C. Now the electric heater is turned on, and the heater runs until the air temperature in the house rises to an average value of 22°C. Determine how much heat is absorbed by the air assuming some air escapes through the cracks as the heated air in the house expands at constant pressure.
Newton's Law of Cooling says that the rate at which a body cools is proportional to the differnce C in temperature between the body and the environment around it. The temperature f(t) of the body at time t in hours after being introduced into an environment having constant temperature T0 is f(t)=T0+Ce-kt, where C and k are constants.A pot of coffee with initial tempature of 100°C is set down in a room with a tempature of 20°C.The coffee cools to 60°C after 1 hour. A)Write an equation to model the data. B)Find the tempature after half an hour. C)How long will it take for the coffee to cool at 50°C
The volume and temperature of a gas at the beginning of expansion are 0.0056m3 and 183°C, respectively; at the end of expansion the values are 0.0238 m3 and 22°C, respectively. find the value of n.
A mass of 10 g of oxygen fill a weighted piston-cylinder device at 20 kPa and 94.0°C. The device is now cooled until the temperature is 0°C. Determine the change of the volume of the device during this cooling. The gas constant of oxygen is R = 0.2598 kPa.m³/kg-K. (Round the final answer to three decimal places.) The change of volume is m³.