A 16,000-ft³ hydrogen balloon’s cargo and structure have a mass of 650 lbm. What must be the initial sand mass to prevent lift-off? Assume 14.7 psia and 55°F.

Q: How do crumple zones on cars reduce forces on occupants in a collision?

A: Crumple zones are also known as crush zones used in automobiles, as a structural safety feature to…

Q: 400 lb 30° Hk = 0.5 2017 1250 Ib 20' В

A:

Q: In falling objects experiment, air friction is usually considered in calculation. Select one: a.…

A: True

Q: In a news article, it is stated that a recently developed geared turbofan engine produces 15,000…

A: As we know thrust is a force and lbf is the force unit in the English system so that it represent…

Q: tarting friction is low in: A.   Hydrostatic lubrication B.   Hydrodynamic lubrication C.   Mixed…

A:

Q: Part C: Balancing: Four masses A, B, C and D as shown below, are to be completely balanced. C D Mass…

A: mA=10mB=4mD=5

Q: mic system

A: given: name two property of thermodynamic system?

Q: team at 0.029 MPa has a dryness of 60%. Find its Entropy in kJ/kg-k choose the correct final answ

A: Given:Pressure ,P=0.029 MPadryness fraction, x=60 % or 0.6

Q: . Given the barometric pressure of 14.7 psia (29.9 in. Hg abs), make these conversions: a. 8() psig…

A: Given Data The gauge pressure is: Pg=80 psi The barometric pressure is: Pb=14.7 psi For the second…

Q: A hydraulic cylinder has a 750 mm diameter. How much force (kN) can be developed with 275 kPa oil…

A: Given    Pressure, P = 1275 kPa  Diameter, d = 750 mm                     = 0.75 m Find   Force…

Q: e lift slope for a straight wing is

A: Given: Aspect ratio= 5 Lift slope for airfoil section = 0.1/degree To find Lift slope for straight…

Q: The military jet aircraft

A: ANSWER=10.64ft/s2 EXPLANATION-

Q: The degree of hotness or coldness pertains to what terminology? Select one: a. heat b. Enthalpy c.…

A:

Q: Quastions about renewable energy system

A: Small wind power plants are installed at the location where power requirement is less and initial…

Q: Define the site for a wind farm?

A: A suitable site for wind farms is the one where airflow at a constant high speed and less turbulence…

Q: In a single cylinder reciprocating engine, the primary unbalanced force is maximum

A: In a single cylinder reciprocating engine, there is one primary and one secondary unbalanced force.

Q: Small explanation. Aerodynamic lift results from ________ Principle.

A:

Q: Discuss Uniform temperature loads (TU)

A: Temperature loads over a structure can be uniform in nature which is base upon specific field of…

Q: A receiver must supply air to a pneumatic system consuming 30 scfm for 15 min between 140 psi and…

A: As per given question  We have to determine the size is required if the compressor is running and…

Q: 4.5 ft 1.5 ft 1.5 ft 2.5 ft 3.5 ft The crate weight is 270 lb. The minimum force p for tipping is_…

A:

Q: PROBLEM 8. The total weight of space shuttle including its payload mass and the empty external tank,…

A: Given data The total weight of space  mo = 428,100 lb. The external tank and the two solid rocket…

Q: Fg= 900 N A Fc= 600 N 6 m 3 m 45 B 45m 6m

A:

Q: a) Define the "force exerted by air pressure" in a pneumatic cylinder? b) Differentiate double…

A: “Since you have asked multiple question, we will solve the first question for you. If you want any…

Q: Can mass and weight be used interchangeably? Explain.

A:

Q: parts is 40 kg and 30 kg respective y, then mass to be balanced at the crank pin will be equal to?

A: given:Mreciprocating=40kgmrev=30kgbalanced percentage 60%

Q: Given: Q=14,361.60gpm L=1000ft D=2ft hf=12.58ft. Determine the friction

A: Given     Discharge, Q = 14361.60 gpm = 0.91 m3/s         Length, L = 1000 ft = 304.8 m…

Q: Atruk has an engine power of 50 kN, what the power that makes the truck speed ?80 km 2.11 Mw 1.21 Mw…

A:

Q: Calculate car engine effeciency based on fuel input? Data: Fuel volume= 10% of total Volume CC= 1991…

A: Total Volume VT=1991 cm3Number of cylinder k=4Fuel Volume =10%VTFuel Volume=.10×1991Fuel…

Q: Determine the minimum power required for a hoist crane that will lift a 20metric tons of load at the…

A: Given data: m = 20 metric ton = 20,000 kg V = 0.6 m/s Need to determine the minimum power required…

Q: Give me an example of a space mission that used the MR-107T 110N (25 lbf) Rocket Engine Assembly

A: The MR-107T 110N(25lbf) rocket engine will be used by Nasa. The thruster used will be MR-107T 110N…

Q: ‘Hydraulic lift’ works on the basis of

A:

Q: What If? For parts (b) through (e) that follow, assume the two engines are Carnot engines. Engine 1…

A: C) Does an improvement in net efficiency result from the use of two engines instead of one, This…

Q: A cylindrical container with a diameter of 11.5 m. It has an outlet almost to the bottom, rounded…

A: Given: Diameter : 11.5 m Diameter of hole : 1.2 m h = 12 m

Q: In dead weight tester, the applied load is 0.017 N, theoretical pressure is 15 kPa. Then the area of…

A: Given: Applied load F = 0.017N Theoretical pressure P = 15KPa

Q: required for a fan to deliver 200ft/sec of air through a 2ft x 4ft duct under a total pressure of…

A:

Q: Q3/Answer by true or false :  1) All water systems using fan coil units are suitable in buildings…

A: 1)In all water system water is used to heat or cool the conditioned space. In this system a fan coil…

Q: What mechanical forces are generated in a reciprocating compressor? b) Briefly explain them

A: A downward-moving piston in a reciprocating compressor lowers pressure in its cylinder by…

Q: A hydraulic lift system utilizes two 5 in diameter cylinders. Workers must determine how much the…

A: The capability of the lift can be calculated easily using the formula given below as- F=PA where, F…

Q: 20. What is the most probable value of universal gas constant? c. 1545lb-ft/lb-°R a. 8.3142kJ/kmol-K…

A: Option a is correct.

Q: 3. A 3" diameter pneumatic piston is used to lift a load of 100 lb. A. What air pressure is required…

A: Given        Load, F = 100 lb = 445 N  Diameter, d = 3 in = 0.076 m Find   Pressure, P   Volume, V

Q: Which of the following are correct and valid for the Kelvin-Plank statement?

A: (a) (b) (d) (f). (g) are correct the options.

Q: A combine 9.3' of water, 6.5' of oil (SG = 0.71), and 5.0' of air at 26 psig and 70 deg F. What is…

A: Height of water, hw=9.3 ftHeight of oil, ho=6.5 ftHeight of air, hair=5.0 ftSpecific gravity of oil,…

Q: D 30° A 10 kg

A: Let TAB is Tension in AB chord  TAC is Tension in AC chord  TAD is Tension in AD chord  g=10m/s2 For…

Q: maximum seating capacity of 25 occupants : Recirculated air (2) Outside air Room tor =34°C tm = 28°C…

A: td1-34°Ctd2=24°Ctw1=28°CRH=50%

Q: A vertical sliding gate 20 ft wide and 30 ft high is submerged in 40 ft of water, has coefficient of…

A:

Q: The coefficient of friction depends on a. area of contact

A: Related to coefficient of friction various laws have been given by great researchers such as:…

Q: State true or false for the given statements with valid justifications: a) Isothermal compression is…

A: (a) The compression take place at temperature constant is most efficient as the efficiency of gas…

Q: The effect of    _____  wind speeds generally

A: Given data  To fill the blank.