Engineering

Mechanical EngineeringQ&A LibraryThe drinking water needs of an office are met by cooling tap water in a refrigerated water fountain from 23 to 6°C at an average rate of 18 kg/h. If the COP of this refrigerator is 3.1, the required power input to this refrigerator is (a) 1100 W (b) 355 W (c) 195 W (d) 115 W (e) 35 WStart your trial now! First week only $4.99!*arrow_forward*

Question

The drinking water needs of an office are met by cooling tap water in a refrigerated water fountain from 23 to 6°C at an average rate of 18 kg/h. If the COP of this refrigerator is 3.1, the required power input to this refrigerator is (a) 1100 W (b) 355 W (c) 195 W (d) 115 W (e) 35 W

Tagged in

Engineering

Mechanical Engineering

Find answers to questions asked by students like you.

Q: An 8-cm-diameter horizontal water jet having a velocity of 35 m/s strikes a vertical stationary flat...

A: Given data as per the question The diameter of the pipe = 8 cm Velocity of water = 35 m/s

Q: A vertical 1.5-m-high, 2.8-m-wide double-pane window consists of two layers of glass separated by a ...

A: Determined the film temperature Here surface temperature is Ts and room temperature is T0

Q: Milk with a density of 1020 kg/m3 is transported on a level road in a 9-m-long, 3-m-diameter cylindr...

A: Given that,

Q: Consider the following steady, three-dimensional veloc ity field in Cartesian coordinates: V-› = (u,...

A: Any given flow is incompressible if the divergence of its velocity field is zero.

Q: F3-4. Determine the moment of the force about point O. 50 N -100 mm- 60° 200 mm 45° -100 mm-

A: Draw the vector resolution of the force.

Q: Consider the magnesium oxide-aluminum oxide phase diagram; ss indicates a solid solution. The radii ...

A: Hello. Since your question has multiple sub-parts, we will solve the first three sub-parts for you. ...

Q: A house is maintained at 1 atm and 24°C, and warm air inside a house is forced to leave the house at...

A: Given data: Pressure, P = 1 atm Air Temperature, Tin = 24°C Rate of flow of warm gas from inside of ...

Q: Can you please do P7.41 Thx

A: The loading diagram of the beam is shown as follows, Let's draw the free body diagram of the beam,

Q: 10-99 A composite body is constructed by attaching a steel (w = 490 lb/ft) hemisphere to an aluminum...

A: Given Data: The height of the cone is: h=25 in The base radius of the cone is: r= 5 in The radius o...

Q: For the inverted manometer of Fig, all fluids areat 20 ° C. If p B -p A = 97 kPa, what must the heig...

A: Given Fluids temperature = 20o Difference in pressure head PB – PA = 97 kpa = 97000 pa Specific grav...

Q: 13–43. A parachutist having a mass m opens his parachute from an at-rest position at a very high alt...

A: Draw the free-body diagram of the parachute.

Q: Q1: The masthead fitting supports the two forces. Determine the magnitude of T which will cause no b...

A: Click to see the answer

Q: Please answer print reading for industry 15-1 # 9, 12, and #15

A: 1) Yes, It is the detailed drawing of one part. This drawing do not have bill of material table. 2) ...

Q: An adiabatic pump is to be used to compress saturated liquid water at 10 kPa to a pressure of 15 MPa...

A: Write the values of enthalpy and entropy for saturated liquid water from the steam table correspondi...

Q: Determine the state of stress at point A on the cross section of the shaft at section a–a. Show the ...

A: The free-body diagram of point A is written as, On using the force equilibrium in the z-direction, ...

Q: The 8-mm-diameter bolt is made of an aluminum alloy. It fits through a magnesium sleeve that has an ...

A: Given data: Bolt diameter, db = 8 mm Inner diameter, di = 12 mm Outer diameter, do = 20 mm Original ...

Q: A piston-cylinder device initially contain 0.4 m3 of 1.8-kg saturated liquid water and steam mixture...

A: Hello. Since your question has multiple sub-parts, we will solve first three sub-parts for you. If y...

Q: The drag force exerted on a car by air depends on a dimensionless drag coefficient, the density of a...

A: The expression for FD is written as, Now write the drag force in the desired variable,

Q: 2-63. Express each of the forces in Cartesian vector form and then determine the magnitude and coord...

A: writing the position vector of points A, B and C as a , b and c respectively: After getting the pos...

Q: A 900-mm rod rests on a horizontal table. A force P applied as shown produces the following accelera...

A: The free body diagram which explains how the system works

Q: The cable shown in Fig. weighs 35 N/m. Determine the maximum tension in the cable and the sag ha in ...

A: Draw the free-body diagram of the cable.

Q: The screw of the clamp exerts a compressive force of 500 lb on the wood blocks. Determine the maximu...

A: Area at section (a-a) Moment of inertia at section (a-a)

Q: i want full answer with the all steps

A: Click to see the answer

Q: In Fig. P3.41 the vane turns the water jet completelyaround. Find an expression for the maximum jet ...

A: The force in a direction by the fluid can be expressed as the change in momentum of the fluid in tha...

Q: What is the product solution method? How is it used to determine the transient temperature distribut...

A: Product solution method is a super position method which is used in one dimensional heat conduction ...

Q: Use prefix multipliers to express each measurement without any exponents. 55.2 x 10-10 s

A: Click to see the answer

Q: F3-3. Determine the moment of the force about point O. - 1.5 m 1m 45°. 0.3 m 6 kN

A: The free body diagram explains the problem Let x be the distance between AC

Q: Two friction disks A and B are brought into contact when the angular velocity of disk A is 240 rpm c...

A: Given Diameter of disc A is 150 mm = 0.15 m RPM disc A = 240 rpm Counter clockwise Diameter of disc ...

Q: A man weighing 400N climbs up a ladder 5 meters long. The ladder initially rests against a frictionl...

A: Assumptions 1) Weight of the ladder is neglected 2) coefficient of friction of wall is neglected Gi...

Q: Oil is being cooled from 180°F to 120°F in a 1-shell and 2-tube heat exchanger with an overall heat ...

A: Given data: Specific heat of water, Cpc = 1 Btu/lbm·°F Mass flow rate of water, mc = 20000 lbm/hr ov...

Q: A pitot tube is used to measure the mean velocity in a pipe where water is flowing. A manometer cont...

A: Click to see the answer

Q: F3-12. If F = {500i – 600j + 375k} N and F, = {-1000i + 1250j + 500k} N, determine the resultant mom...

A: Given data *The given force is, F1 = [500i - 600j +375k] N *The another force is, F2 = [-1000i + 125...

Q: 24. Locate the centroid ( x , y ) of the composite area in figure below 100 mm

A: Consider the given section as shown below – The area and centroid of every section is given below –...

Q: 8-48 A beam is loaded and supported as shown in Fig. Using the coordinate axes shown, write equation...

A: Click to see the answer

Q: For low-speed (laminar) steady flow through a circular pipe, as shown in Fig. P1.12, the velocity u ...

A: Using boundary conditions we know that at r=0 , u is maximum So dimensions of all other quantities

Q: Q 2 For the equilibrium system determine the reactions Ra and Rb ? 20ON looN GON.m 2m 100 N.m Rb Ra

A: Click to see the answer

Q: Q.1. In a creep test, a material with E = 600 MPa is initially loaded with a stress o, = 297 MPa. 1....

A: Click to see the answer

Q: Consider a 20-cm-diameter spherical ball at 800 K suspended in air. Assuming the ball closely approx...

A: Given data as per question Diameter of sphere = 20 cm Sphere temperature = 800 k wavelength = 3um

Q: A plate (0.5 m * 0.5 m) is inclined at an angle of 30°. The top surface of the plate is well insulat...

A: Given data Area of the plate A = 0.25 m2 Inclination angle of the plate = 300 Surrounding temperatur...

Q: Convert between energy units. 534 kWh to J

A: There are basically two units for energy conversion one is Joules and other is calories For conversi...

Q: The door to an airplane hangar consists of two uniform sections, which are hinged at the middle as s...

A: Drawing FBD of door AB:

Q: The collar is released from rest in the position shown and slides down the fixed rod. Calculate (a) ...

A: Click to see the answer

Q: Nanotechnology, the field of building ultrasmall structures one atom at a time, has progressed in re...

A: Write the given data:

Q: The box is at rest at point 1 when it is sliding down the incline. If the 1 1 H, = 0.40 HA = 0.30 %3...

A: Let mass of box be M After beginning of motion kinetic friction comes into action So from 1 to 2 FBD...