Questions
11- A standard V belt is used to connect two sheaves with pitch diameters of 8,4...

11- A standard V belt is used to connect two sheaves with pitch diameters of 8,4 in. and 27.7 in. with a center distance of no more than 60.0 in.

a-Specify an acceptable belt.

b-If the small sheave is rotating at 1160 rpm, compute the linear speed of the belt.

c-Determine the contact angle for each sheave if this is an open belt drive.

d-Find the rated horsepower.

e-What is the actual center distance?

In: Mechanical Engineering

A car and the suspension system are a damped spring, mass system, with a natural frequency...

A car and the suspension system are a damped spring, mass system, with a natural frequency 2 Hz and a damping coefficient 0.2. The car drives at speed V over a road with sinusoidal roughness. The roughness wavelength is 20 m, with a amplitude of 50 cm. What speed does the maximum amplitude of vibration occur? What is the corresponding vibration amplitude?

Please do not use an older solution.

In: Mechanical Engineering

) A wet multiple-disc clutch with sintered linings is required to transmit 120 Nm of torque...

) A wet multiple-disc clutch with sintered linings is required to transmit 120 Nm of torque at 1000 rev/min. The axial force is created when 6 helical compression springs deflect 5 mm. Each spring has a spring constant k = 142 N/mm. Assuming uniform wear, determine :- (i) the outside and inside diameters if ri = 0.577 ro . (ii) the number of discs required. (iii) the maximum power that can be transmitted

In: Mechanical Engineering

Compare the ranges of applications of thermistors, thermocouples, and cold wires. Give examples of temperature measurements...

Compare the ranges of applications of thermistors, thermocouples, and cold wires.
Give examples of temperature measurements for which each of the three methods would be suitable, but the other two would not.

please, computer typing

In: Mechanical Engineering

For H2O, determine the specific volume at the indicated state, in m3/kg. (a) T = 400°C,...

For H2O, determine the specific volume at the indicated state, in m3/kg. (a) T = 400°C, p = 20 MPa. (b) T = 120°C, p = 20 MPa. (c) T = 40°C, p = 2 MPa.

I have figured out how to do A, but can't get the correct answer for B or C. All the examples I am finding are with numbers that are listed already on the charts, and mine are not so I need to approach the problem from a different angle. I tried interpolating between two points on the Properties of Compressed Liquid Water and got v=1.05 but this is not the correct answer. I'm fairly confident that my interpolation is right and had a friend double check it for me, so I must be approaching the problem wrong in some other way.

Please do not post the solution using different numbers. I have had issues in the past with someone copy and pasting the solution from another, easier, number set and essentially wasting one of my questions. I always look at similar questions that have been posted before posting my own and know that they are not helping me with this particular problem. I only get 20 a month so I have to make them count! Thanks in advance :)

In: Mechanical Engineering

An axial flow fan has a hub diameter of 1.50 m and a tip diameter of...

An axial flow fan has a hub diameter of 1.50 m and a tip diameter of 2.0 m. It rotates at 18 rad/s and when handling 5.0?^(3)s^(-1) of air, develops a theoretical head equivalent to 17mm of water. Determine the blade outlet and inlet angles at the hub and the tip. Assume that the velocity of flow is independent of radius and that the energy transfer per unit length of blade is constant. Assume density of air is1.2 kg/m^3

In: Mechanical Engineering

Please explain the step by step concept of XPS ,auger and chemical shift in the graph...

Please explain the step by step concept of XPS ,auger and chemical shift in the graph as simply as possible.

In: Mechanical Engineering

Given a point P = (2, 1, 2) and using the homogenous representation: Calculate the coordinates...

Given a point P = (2, 1, 2) and using the homogenous representation:

Calculate the coordinates of the transformed point P* if P is rotated about the X, Y, and Z axes by angles 60°, 30°, and 60° respectively.

If the point P* obtained in part (a) is to be rotated back to its original position, find the corresponding rotation matrix. Verify your answer.

Calculate P* if P is translated by d = 2i – 3j + k and then scaled uniformly by s=3.0.

In: Mechanical Engineering

0.5 kg of a gas at temperature t1=20?C and pressure p1=0.1 MPa was contained in a...

0.5 kg of a gas at temperature t1=20?C and pressure p1=0.1 MPa was contained in a cylinder with a piston. The gas was compressed (polytropic process) and a ratio of heat exchanged during the process to the work of compression was ¼. Find the final temperature and pressure of the gas if 15 KJ of heat was transferred to the surroundings. Specific heats at constant volume and pressure were 654.67 J/Kg/K and 897.64 J/kg/K, respectively.

In: Mechanical Engineering

The Tools Company uses a lathe to machine an aluminum block. The operation time is 5...

The Tools Company uses a lathe to machine an aluminum block. The operation time is 5 minutes. On average, the lathe requires maintenance after 200 parts. The average maintenance time is about 2 hours. (For the purpose of these calculations, maintenance is the same as failure.

A.) What is the production rate of the machine in parts per minute? (Round to 3 decimal places)

B.) Continuing from Part 1, the next operation after turning (lathe operation), is a milling operation. The operation time at the milling machine is 4 minutes. Its mean time to fail is 30 hours and its mean time to repair is 5 hours. Any amount of parts can be stored in between the lathe and the mill. At what rate material on average will accumulate in the storage area in terms of parts per minute? (Round to 3 decimal places)

C).Continuing from Part 2. What is the production rate of this two-machine line in terms of parts per minute? (Round to 3 decimal places)

D.) Continuing from Part 3. Now a third and final operation is added to the line. This is a manual polishing operation that removes the burrs generated from the machining processes. The operation time is 10 minutes, and the worker takes a break on average every 18 parts. The breaks typically last 15 minutes on average. What is the production rate of this line assuming the buffers in between the machines are infinite in parts per minute (Round to 3 decimal places)?

E) What is the rate of material accumulation in the line in parts per minute? (Round to 3 decimal places)

In: Mechanical Engineering

Refrigerant 134a enters the evaporator of a refrigeration system operating at steady state at -4oC and...

Refrigerant 134a enters the evaporator of a refrigeration system operating at steady state at -4oC and a quality of 20% at a velocity of 6 m/s. At the exit, the refrigerant is a saturated vapor at -4oC. The evaporator flow channel has constant diameter of 1.7 cm. Determine the mass flow rate of the refrigerant, in kg/s, and the velocity at the exit, in m/s.

In: Mechanical Engineering

A hot dog can be considered to be a 12 centimeter long cylinder, whose diameter is...

A hot dog can be considered to be a 12 centimeter long cylinder, whose diameter is 2 cm and whose properties are ? = 980 kg/m3 , cp = 3.9 kJ/kg · K, k = 1.2 W/m · K, and ? = 2 × 10?7 m2 /s. A hot dog initially at 5?C is dropped into boiling water at 100?C. The heat transfer coefficient at the surface of the hot dog is estimated to be 600 W/m2 · K and the hot dog can be considered cooked when its center temperature reaches 80?C (a) Determine how long it will take to cook considering the hot dog as a long cylinder. (b) Determine the cooking time assuming lumped capacitance.

In: Mechanical Engineering

Any 10 examples of dot product and any 10 examples of cross product for physics

Any 10 examples of dot product and any 10 examples of cross product for physics

In: Mechanical Engineering

A spherical thermocouple junction 1.0 mm in diameter is inserted in a combustion chamber to measure...

A spherical thermocouple junction 1.0 mm in diameter is inserted in a combustion chamber to measure the temperature ?T? of the products of combustion. The hot gases have a velocity of V= 5 m/s. (a) If the thermocouple is at room temperature, Ti,when it is inserted in the chamber, estimate the time required for the temperature difference, ?T?-T, to reach 2% of the initial temperature difference, ?T?-Ti. Neglect radiation and conduction through the leads. Properties of the thermocouple junction are approximated as k= 100 W/m·K, c=385 J/kg·K, and ?=8920 kg/m3, while those of the combustion gases may be approximated as k=0.05 W/m·K, ?=50 x 10-6 m2/s, and Pr=0.69.

(b) If the thermocouple junction has an emissivity of 0.1 and the cooled walls of the combustor are at Tc=400 K, what is the steady-state temperature of the thermocouple junction if the combustion gases are at 1000 K? Conduction through the lead wires may be neglected.

Assuming that the gas properties are constant, what is the value of the Nusselt number?

What is the average convection heat transfer coefficient for the gas flowing over the thermocouple, in W/m2·K?

What is the Biot number for this problem?

How long does it take for the temperature difference (?T?-T) to get within 2% of the initial temperature difference (?T?-Ti), in s?

What is the final steady state temperature of the thermocouple, in K, if the combustion gases are at 1000 K?

In: Mechanical Engineering

In a porter governor, the upper and lower arms are each 220m long, and aare each...

In a porter governor, the upper and lower arms are each 220m long, and aare each inclined at 30degrees to the vertical when the sleeve is in its lowest position. the points of suspension are each 40 mm from the axis of the spindle. The mass of each of the three rotating balls is 3kg and that of the central load on the sleeve is 30kg. if the movement of the sleeve is 36 mm, find the range of speed of the governor. Neglect friction.

In: Mechanical Engineering