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Reil [10]
3 years ago
14

The radiator of a steam heating system has a volume of 35 L and is filled with superheated water vapor at 200 kPa and 200°C. At

this moment, both the inlet and the exit valves to the radiator are closed. After a while it is observed that the temperature of steam drops to 80°C as a result of heat transfer to the room air, which is at 21°C. Assume the surroundings to be at 0°C.
Determine the entropy change of the steam during this process.
Engineering
1 answer:
STatiana [176]3 years ago
7 0
The radiator of a steam heating system has a volume of 20 L and is filled with superheated water vapor at 200 kPa and 200°C. At this moment both the inlet and ...
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What term specifically describes small chunks of rocks and debris in space that burn up in Earth’s atmosphere?
inessss [21]

Term specifically describes small chunks of rocks and debris in space that burn up in Earth’s atmosphere is :

Meteors

Explanation:

  • A meteor is a meteoroid or a particle broken off an asteroid or comet orbiting the Sun – that burns up as it enters the Earth's atmosphere, creating the effect of a "shooting star".
  • Meteoroids that reach the Earth's surface without disintegrating are called meteorites.
  • Due to Earth's escape velocity, the minimum impact velocity is 11 km/s with asteroid impacts averaging around 17 km/s on the Earth. The most probable impact angle is 45 degrees.
  • Meteoroids have a pretty big size range. They include any space debris bigger than a molecule and smaller than about 330 feet space debris bigger than this is considered an asteroid.
  • But most of the debris the Earth comes in contact with is "dust" shed by comets traveling through the solar system.
  • The surface of a meteorite is generally very smooth and featureless, but often has shallow depressions and deep cavities resembling clearly visible thumbprints
  • Most iron meteorites, like the example at right, have well-developed regmaglypts all over their surface.
6 0
4 years ago
50POINTS
maxonik [38]

Answer:

Ensure that all material and energy inputs and outputs are as inherently safe and benign as possible. Minimize the depletion of natural resources. Prevent waste. Develop and apply engineering solutions while being cognizant of local geography, aspirations, and cultures.Green engineering is the design, commercialization, and use of processes and products that minimize pollution, promote sustainability, and protect human health without sacrificing economic viability and efficiency.The goal of environmental engineering is to ensure that societal development and the use of water, land and air resources are sustainable. This goal is achieved by managing these resources so that environmental pollution and degradation is minimized.

Explanation:i helped

7 0
3 years ago
Read 2 more answers
If the contact surface between the 20-kg block and the ground is smooth, determine the power of force F when t = 4 s. Initially,
grigory [225]

Answer:

The power of force F is 115.2 W

Explanation:

Use following formula

Power  = F x V

F_{H} = F cos0

F_{H} = (30) x 4/5

F_{H} = 24N

Now Calculate V using following formula

V = V_{0} + at

V_{0} = 0

a = F_{H} / m

a = 24N / 20 kg

a = 1.2m / S^{2}

no place value in the formula of V

V = 0 + (1.2)(4)

V = 4.8 m/s

So,

Power = F_{H} x V

Power = 24 x 4.8

Power = 115.2 W

3 0
3 years ago
Government actions can have positive or negative effects on business. true or false
Papessa [141]

This is true. Anything the government does has a positive or negative effect on anything including businesses.

5 0
3 years ago
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A pipe leads from a storage tank on the roof of a building to the ground floor. The absolute pressure of the water in the storag
Fudgin [204]

Answer:

6.4 m/s

Explanation:

From the equation of continuity

A1V1=A2V2 where A1 and V1 are area and velocity of inlet respectively while A2 and V2 are the area and velocity of outlet respectively

A1=\pi (r1)^{2}

A2=\pi (r2)^{2}

where r1 and r2 are radius of inlet and outlet respectively

v1 is given as 1.6 m/s

Therefore

\pi (0.01)^{2}\times 1.6 = \pi (0.005)^{2}v2

V2=\frac {\pi (0.01)^{2}\times 1.6}{\pi (0.005)^{2}}=6.4 m/s

3 0
4 years ago
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