A computer in a closed room of volume 200 m³ dissipates energy at a rate of 5 kW. The room has 500 kg of wood, 45 kg of steel, and air, with all material at 300 K and 100 kPa. Assuming all the mass heats up uniformly, how long will it take to increase the temperature 10°C?

A computer in a closed room of volume 200 m³ dissipates energy at a rate of 5 kW. The room has 500 kg of wood, 45 kg of steel, and air, with all material at 300 K and 100 kPa. Assuming all the mass heats up uniformly, how long will it take to increase the temperature 10°C?

Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)

8th Edition

ISBN:9781305387102

Author:Kreith, Frank; Manglik, Raj M.

Publisher:Kreith, Frank; Manglik, Raj M.

Chapter2: Steady Heat Conduction

Section: Chapter Questions

Problem 2.39P: The tip of a soldering iron consists of a 0.6-cm- diameter copper rod, 7.6 cm long. If the tip must...

See similar textbooks

Related questions

Q: PROBLEM 4: The basic barometer can be used to measure the height of a building. If the barometric re...

Q: Figure shows the schematic representation for the measurement of velocity of air (density= 1.2 kg/m³...

A: Given data: ρair=1.2 kg/m3ρw=1000 kg/m3g=9.8 m/s2x=10 cm Need to determine the velocity.

Q: Moist air at 35degree C and 100% relative humidity is entering a psychometric device and leaving at ...

Q: A jet of water strikes a stationary curved plate at one end at an angle of 30°. The jet of 75 mm dia...

Q: The force Frequired to hold the plug in its position is (a) 2pR gL 1- 1 (b) 2pR gL 1+ 4 (c) TR?p gL ...

Q: Figure shows the schematic representation for the measurement of velocity of air (density= 1.2 kg/m³...

Q: Locate the centroid of the plane area shown. y 60 mm 60 mm

A: As per given question Centroid of plan area of given figure

Q: steam 8.0 mpa and 485 degrees celsius enter the turbine and expand at condenser pressure of 0.006 mp...

A: Given data: At turbine entry: Pressure = P1 = 8 MPa Temperature = T1 = 485 oC At condenser Pressu...

Q: clearance ratio of the compressor.

A: Given; Clearance volume of a reciprocating compressor, Vc=120 mlVolume of the cylinder at bottom de...

Q: The truck carries an open rectangular container that is 3.9m wide, 3.0m deep and 5.0m long, contains...

A: Givenwidth of the tank w=3.9mdepth of the tank d=3mlength of the tank L=5mdensity of oil ρ=811kg/m3d...

Q: 2.4-23 A trimetallic bar is uniformly compressed by an axial force P = 9 kips applied through a rigi...

Q: Between 300K and 600K is the operating temperature of a pair of heat pumps connected in series. The ...

Q: Calculate the discharge through the 140-mm diameter orifice shown. Assume C = 0.62.

A: Need to find the discharge through orifice.

Q: Compute for the forces in all members of the truss shown below using method of joints. -6 ft+6 ft+6 ...

A: GIVEN DATA - A PLANE TRUSS GIVEN WE HAVE TO FIND FORCES IN ALL MEMBER

Q: Determine the equivalent torsional spring constant of a spring that will represent the system such t...

A: Given data: k=5 N/ml=1.5 m Need to determine the equivalent spring constant.

Q: An automobile engine develops 33.5 hp at 1,000 rpm. The clutch used to transmit this power in a sing...

Q: 4) Figure below shows a spring-mass- damper system. The mass is subjected to a steady force of P 2 N...

Q: A Triangular gate having a horizontal base of 1.30 m and an altitude of 2 m is inclined 45o from the...

A: Givenbase of the triangular gate, b=1.30mAltitude of the triangular gate, a=2mspecific gravity of th...

Q: A jet of water strikes a stationary curved plate at one end at an angle of 30°. The jet of 75 mm dia...

A: It is asymmetrical curved plate and water jet strikes at the one end of the plate. Write the given d...

Q: QUESTION The following data were obtained during a tension test of a low carbon steel specimen havin...

Q: Oil flows through a 200 mm diameter horizontal cast iron pipe (friction factor f=0.0225) of length 5...

Q: Two vertical tanks are connected near the bottom by a short tube having a cross sectional area of 0....

A: following is the solution to the above problem

Q: If the ratio of the diameter of the rivet hole to the pitch of rivets is 0.38, then the tearing effe...

A: Calculated the tearing efficiency of the joint.

Q: A solar energy based HE which recieves 60KJ of heat at 900C and rejects 50kJ of heat to the ambient ...

A: Given data, Q1= 60 kJ ,T1= 90°C Q2= 50 kJ ,T2= 30°C

Q: Determine the maximum torque of the tube shown if the allowable shearing stress is 46 Mpa. Given: t ...

A: Given data:allowable shear stress = 46 MPat = 2.73 mma= 33 mm

Q: The tank shown has one curved surface restraining a body of static fluid, with the following dimensi...

A: Find the value of depth of centre of gravity of curved surface from free surface(X-bar) Given data:-...

Q: A column of length 1 m is hinged at both ends has cross-section (10 x20) mm2. Young's modulus of ela...

A: Given Length, L = 1 m Young's modulus, E = 200 GPa Find Axial load, P

Q: What average force is necessary to bring a 45.0-kg sled from rest to a speed of 3.00 m/s in a period...

A: First we calculated the value of acceleration using equation of motion and then put values in, Force...

Q: Thanks sir

A: Given data : The value of force =F The value of displacement=D Required : Work done

Q: 1. The block shown in Figure 04 weighs 35000 lbs. Find the value of x. 12' x 12' 3 ft 0.8 16. Figure...

Q: 500 lb./ft. 200 lb. 300 lb./ft. 150 lb./ft. 8 ft. 4 ft. 4 ft. 2 ft.

Q: the degree of freedom

A: Given

Q: Consider a frictionless, massless and leak-proof plug blocking a rectangular hole of dimensions 2Rx ...

Q: Compute the resultant of the three forces acting on the plate shown. Locate its intersection with AB...

Q: The heat removal rate from a refrigerated space and the power input to the compressor are 8.5 kW and...

Q: Object A of mass M has an original velocity of 6.50 m/s in the +x-direction toward a stationary obje...

Q: The heat removal rate from the refrigerated space and the power input to the compressor are 9.0KW an...

A: Given Data QL=9 kW W= 1.8 kW

Q: A rigid steel tank contains a mixture of vapor and liquid water at a temperature of 65°C. The tank h...

Q: Helium expands polytropically through a turbine according to the process pv15=C. The inlet temperatu...

A: As per given question Inlet temperature =1000k Inlet pressure =1000k Exit pressure =150kpa Work pro...

Q: Figure 2.1 shows a double-pipe heat exchanger is constructed of a stainless steel (k =15.1 W/m.°C) i...

Q: A steel billet of 1800kg mass is to be cooled from 1100K to 450K. The heat released during this proc...

Q: A 40 kg-mass hangs from the end of a uniform beam. The beam is 6.0 m long and has a mass of 60 kg. T...

Q: wn gas has a mess of 1.5 kg and occupies 2.5 m while at a temperature of 300 K and a pressure of 200...

A: Given:m=1.5 kgV=2.5 m3T=300 KP=200 kPa

Q: final velocity of the block is to value.

A: Need to find final velocity of block.

Q: 2. The homogeneous bar AB weighs 25 lb. Determine the forces acting on the bar at A and B. Neglect f...

Q: 5 kips/ft 1 kip/ft. 6 ft. 6 ft. 3 ft.

Q: Question: Starting from rest, the cable can be wound onto the drum of the motor at a rate of VA=(3t2...

A: Given: Va=3t2 m/sLeft distance=9 m

Q: 本 Pia A jct f water, haung a lrelocity of 3om/s im pinges on a series of ranes with a velocity of Is...

Q: At t = 0 bullet A is fired vertically with an initial velocity of 450 m/s. When t = 3 s, bullet B is...

Q: The velocity components for a three dimensional incornpressible flow is given by : u=x°-y -zx, v= y'...

A: Given: Velocity component for a three dimensional incompressible flow u=x3-y3-z2x ; v=y3-z3w=...

Concept explainers

Conduction and Convection

When energy travels from one object to another it is said to have undergone heat transfer. Heat transfer is nothing but the transfer of thermal energy or internal energy from one thing to another, like e.g., when a vessel with water, kept on top of a burner, heats up because of the flame underneath it.

Question

A computer in a closed room of volume 200 m³
dissipates energy at a rate of 5 kW. The room has
500 kg of wood, 45 kg of steel, and air, with all
material at 300 K and 100 kPa. Assuming all the
mass heats up uniformly, how long will it take to
increase the temperature 10°C?

Expert Solution

This question has been solved!

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

This is a popular solution!

SEE SOLUTION Check out a sample Q&A here

Step 1

VIEW

Step 2

VIEW

Step 3

VIEW

Trending now

This is a popular solution!

Step by step

Solved in 3 steps with 3 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

One kg of air is heated in a closed rigid vessel such that its temperature changes from 270C to 4270C. Find the heat transferredand change in internal energy. Assume R=0.287kJ/kg K and Cv = 0.786KJ/kg K
Air enters a compressor with a pressure of 14.5 psia, a temperature of 80°F, and a volumetric flow rate of 20 ft3/s, and exits the compressor at 50 psia. Heat transfer from the compressor to its surrounding is 20 Btu/lbm of the air. If the compressor power input is 105 hp, what is the exit temperature of air?
A steam turbine receives 70 pounds of steam per minute with an enthalpy of 1,600 Btu per pound and a velocity of 100 ft/sec. Itleaves the turbine at 900 ft/sec and 1,320 Btu/lb enthalpy. The horsepower output is 373 kW. The radiation heat loss in BTU/hr will be?
An insulated tank contains 10 litres of water at 100 kPa and 20°C A 2 kW electric resistance heater is immersed in water Considering all the electrical energy is used to raise the temperature of water, find the time required to raise the water temperature to 70°C Water can be considered as a constant density flund with density 1000 kg/m³ and the specific heat is constant as 4.2 kJ/kg C in the given range of temperature
A car is driven by an engine power 10kW and running at a constant speed 77km/h. How much is the driving force?
The water vapor that is 3.00 MPa and 540°C goes through a pipe with a 0.40 m^2 cross sectional area and a 8.20 kg/s mass flow rate. At what speed does the vapor flow through the pipe in m/s?
A 0.50-kg chuck of ice at -10⁰C is placed in 3.0 kg of “iced” tea at 20⁰C. The tea can be considered as water. Ignore any heat flow to the surroundings, including the container. The energy needed to bring the water from 20⁰C to 0⁰C is
A large punch bowl holds 3.99 kg of lemonade (which is essentially water) at 20.5 °C. A 0.0550-kg ice cube at -10.2 °C is placed inthe lemonade. What are the final temperature of the system, andthe amount of ice (if any) remaining? Ignore any heat exchangewith the bowl or the surroundings.
I am given a problem about a booster fan in a circular duct with a diameter of 30cm. The work done on the system by the fan is 80 W, causing an increase of pressure on the outlet side of the fan of 70 Pa. All other work and energy is negligible. How do I find the maximum velocity of the air in the duct?
1.A piston-cylinder containing air expands at a constant pressure of 150 KPa from a temperature of 285 K to a temperature of 550K.The mass of air in the cylinder is .05 Kg. Determine the system heat and work for the process
Air is contained in a piston cylinder arrangement shown in the figure. Initially the air is200 kPa and 20 oC while the piston rests on the lower stops. The air is heated, and thepiston starts to rise freely when the pressure reaches 250 kPa until the piston start toencounter a linear spring when the volume is doubled. Heat is further added until the airtemperature reaches 1000 oC when the volume is triple the initial volume. Considering airas ideal gas:a- What is the final pressure?b- Find the specific work done during the whole process.c- Draw the process on a p-v diagram indicating the properties at all states
A refrigerator is connected to a generator powered by a fuel with a calorific value of 35000 kJ/kg and a density of 0.85 g/cm3 . The inside temperature of the refrigerator is 0°C, and the outside temperature is 20°C. a. How much work is required to freeze 500 g of water? ΔfreezingH° = 6.02 kJ mol– 1 ) b. How much internal energy change occurs during the process? c. Since the generator consumes 5 L of fuel per hour, calculate the thermal efficiency of this engine.