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Usimov [2.4K]
3 years ago
6

Need some help with these plz

Engineering
1 answer:
pashok25 [27]3 years ago
5 0

100: D, third law of motion

101: D, second law of motion

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How meny people live in new york
nydimaria [60]

Answer:

8.419 million (2019) at 2019

4 0
3 years ago
A piston–cylinder device contains 15 kg of saturated refrigerant-134a vapor at 280kPa. A resistance heater inside the cylinder w
attashe74 [19]

Answer:

18.77 A

Explanation:

To solve this we use the energy balance equation, that is:

E_{in}-E_{out}=\Delta E_{sys}\\\\Q_{in}+W_{in}+W_{out}=\Delta U\\\\Q_{in}+W_{in}=\Delta U\\\\But\ W_{in}=Voltage(V)*Current(I)*change\ in\ time(\Delta t)=VI\Delta t,\Delta U=m(h_2-h_1)\\\\Given\ that\ m=15kg,V=110\ V,\Delta t=6\ min = (6*60\ s)=360\ s,Q_{in}=20.67\ kJ/kg*15\ kg=310.05\ kJ=310050\ J\\\\From\ table: At\ P_1=280kPa, h_1=249.71\ kJ/kg=249710\ J/kg;At\ P_2=280kPa \ and\  T_1=75^oC,P_2=319.95\ kJ/kg=319950\ J/kg\\\\Substituting:\\\\310500+(110*360*I)=15(319950-249710)\\\\

39600I=1053600-310500\\\\39600I=743100\\\\I=18.77\ A

3 0
3 years ago
When using an alternative method of sizing with two vent connectors for draft hood-equipped water heaters, the effective area of
amid [387]

Answer:

Fifty (50) percent.<em> [50%] </em>

Explanation:

Water heater is a home appliance that comprises of an electric or gas heating unit as well as a water-tank where water is heated and stored for use.

When using an alternative method of sizing with two vent connectors for draft hood-equipped water heaters, the effective area of the common vent connector or vent manifold and all junction fittings shall not be less than the area of the larger vent connector plus fifty (50) percent of the areas of smaller flue collar outlets.

A water heater is primarily vented with an approved and standardized plastic or metallic pipe such as flue or chimney, which allows gas to flow out of the water heater into the surrounding environment.

For a draft hood-equipped water heater, both the water heater and the barometric draft regulators must be installed in the same room. Also, the technician should ensure that the vent is through a concealed space such as conduit and should be labeled as Type L or Type B.

The minimum capacity of a water heater should be calculated based on the number of bathrooms, bedrooms and its first hour rating.

8 0
3 years ago
Compression is maintained during combustion because on top of the motor is a _____
stealth61 [152]

Answer:

fan

Explanation:

7 0
3 years ago
A developer is having a single-lane raceway constructed with a 100 mph design speed. A curveon the raceway has a radius of 1000-
Hoochie [10]

Answer:

(a) 36+45.00

(b) 24+65.00  

(c) 6+517.500

(d) 12+324.800

3 0
3 years ago
Read 2 more answers
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