If you are using a double braid rope that has a breaking strength of 8,600 pounds, how much can safety be liftedonce a knot is tied in the rope?

a. 860

b. 2,000

c. 1,500

d. 650

1) From the data table given, compute the population standard deviation, ?.
2) From the data table given, compute the Upper Control Limit for s (UCLs)
3) From the data table given, compute the centerline, Xbar-bar.
4) From the data table given, compute the Average of s values, sbar.
5)Calculate the Upper Control Limit, UCLXbar
6) From the data table given, compute the Lower Control Limit, LCLXbar

This table was all the information given. I was wondering if I was missing some information. Are any of these questions answerable with just the information given?

List five methods you can enhance heat transfer in a duct

A student conducts an experiment boiling water in a 3.96L pot. The Diameter of the base of the pot is 7-3/4” and the height is 5-1/8”.

2 Liters of water @ 23°C takes 17 minutes before it reaches a boil. It has a height in the pot of 2-3/4”. The process took 1 hour and 13 minutes to boil dry. How much energy was required to do this?

#1 A mass measurement system behaves as a second-order system (consisting of a mass = 50g, a spring, and a viscous damping element). To determine the damping the ratio, the system was exposed to a step input and decaying oscillating amplitude of the system output was measured. Results of these measurements showed that the damping ratio = 0.7 and the ringing frequency f_d =389 Hz. Calculate the following and report results using 3 significant digits minimum:

The natural frequency, in Hz

The spring constant, in kN/m

Logarithmic decrement ln(x₁/x_n)

The period of oscillation when the system is exposed to a step input, in milliseconds

The dynamic error, ?, at 450 Hz in % (include the sign of the error)

The phase and time delay between input and output for sinusoidal inputs of 450 Hz in rad and milliseconds, respectively

Can we use this system to measure mass in outer space? How? Use a diagram to explain.

Consider an airfoil in a high-­?speed wind tunnel. At the minimum-­?pressure point on the wing, the velocity is 900 ft/s. If the test section flow velocity is 750 ft/s at standard sea-­? level conditions:

a) Calculate the pressure coefficient at this point on the wing.

b) Calculate the critical pressure coefficient corresponding to this flight condition.

c) Comparing your answers from parts (a) and (b), what conclusion can you make as to the nature of the flow over the wing? What is the significance of this conclusion with respect to the drag on the airfoil?

a) Briefly discuss how plastic deformation occurs in crystalline materials. Discuss the important methods of strengthening used in (i) cold rolled 1018 steel, (ii) 2024Al alloy in T6 heat treated condition, (iii) brasses, and (iv) quenched and tempered 1045 steel.

refrigerant 134a enters the evaporator of a refrigeration system operating at steady state at -12°C and a quality of 20% at a velocity of 7 m/s. At the exit, the refrigerant is a saturated vapor at -12°C. The evaporator flow channel has constant diameter of 1.7cm.

Determine the mass flow rate of the refrigerant in kg/s

Determine the velocity at the exit in m/s

Air enters a turbine operating at steady state at 6 bar, 1600 K and expands to 0.8 bar. The turbine is well insulated, and kinetic and potential energy effects can be neglected. Assuming ideal gas behavior for the air, what is the maximum theoretical work that could be developed by the turbine in kJ per kg of air flow?

thermo II question

A jet engine does not produce shaftwork; how is power produced?

Gd and T
Circle T if the statement is true. Circle F if the statement is false.
1.      The MMB and LMB symbols are only used if the datum feature has size RMB is implied if the datum feature has size and no boundary symbol is used. No material boundary symbol can be used if a feature does not have size.
2.      Unit straightness can be used if the part must be controlled per unit of measure as well as over the total length.
3.      Specific area flatness should be avoided on very large parts
4.      Circularity is a profile tolerance.
5.      Cylindricity is identified by a radius tolerance zone that establishes two perfect concentric cylinders.
6.      A parallelism tolerance zone must be smaller than the size tolerance of feature.
7.      The perpendicularity of a shaft, such as a stud or pin, to a datum feature establishes a cylindrical tolerance zone.
8.      The note EACH ELEMENT must be applied to a perpendicularity feature control frame.
9.      An angularity tolerance must have a basic angular relationship to a datum.
10. The tolerance zone descriptor of a concentricity tolerance is R.
11. Concentricity is used to establish the relationship between the axis of or more cylindrical features of an object.
12. Surface straightness can violate perfect form at MMC.
13. Geometric tolerances imply RFS unless otherwise specified.
14. A concentricity tolerance should be used if there is a need to control the axis, as in a dynamically balanced shaft. Otherwise, it is recommended that a runout or positional tolerance be used.
15. 69. A coaxial relationship can be controlled by a positional tolerance at M with the datum reference at MMB, LMB, or RMB.
16. LMC is often used to control minimum edge distance or wall thickness.
17. True position is the theoretically exact location of a feature.
18. The datum reference frame exists in theory. The theoretical reference frame is simulated by positioning the part on datum features to adequately relate the part to the datum reference frame and to restrict motion of the part relative to the reference frame.
19. When reference is made to the datum reference frame, the primary datum should be given first, followed by the secondary and tertiary datums. This is referred to as datum precedence.

Refrigerant 134a enters an insulated compressor operating at steady state as saturated vapor at -26^oC with a volumetric flow rate of 0.18 m³/s. Refrigerant exits at 8 bar, 70^oC. Changes in kinetic and potential energy from inlet to exit can be ignored.

Determine the volumetric flow rate at the exit, in m³/s, and the compressor power, in kW.

Consider a vertical plate of dimension 0.25 m × 0.3 m that is at Ts= 90°C in a quiescent environment at ?T?= 20°C. In the interest of minimizing heat transfer from the plate, which orientation, (A) or (B), is preferred? What is the convection heat transfer from the front surface of the plate when it is in the preferred orientation? Evaluate the properties of air at the film temperature.

Determine the convection heat transfer from the front surface of the plate when it is in the preferred orientation, in W.