Which of the following situations would cause the greatest decrease in the motion of molecules in a system
Answers
0 Kelvin = -273 Celsius
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Characteristics of climate?
Answers
Explanation:
- temperature, humidity, atmospheric pressure, wind, and precipitation.
Answers
Answer : Option D) Fixed-position pulleys are connected to a fixed point and do not move.
Explanation : As the name suggests the moving pulleys move freely whereas the fixed pulleys as per their name is attached to a fixed position and at a fixed point and they can not move freely.
Movable pulleys are ones which has one part of the rope attached to a fixed object, like a bar or a beam. Whereas when both the parts of a rope are attached to a fixed object, this is called as a fixed pulley.
It follows one prescribed sequence of steps.
B.
It begins and ends with an experiment.
C.
It is used only in Earth and space science.
D.
It can be cyclic.
I need an answer now please....
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Answer:
D. It can be Cyclic
Explanation:
Science has all different kinds of alike processes.
The scientific method is a generally and usually a Cyclical Process.
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Answer:
81.29 m/s
Explanation:
Given:
60°C = 333 K is cp = 1.007 kJ/kg·K.
at air inlet:
Pressure = 100 kPa
Temperature = 30°C
Velocity = 357 m/s
at air outlet:
Pressure = 200kPa
Temperature = 90°C
We can define the energy balance as:
-
= Δ
= 0
therefore, =
m + m
=m
+
(taking m common and cancelling it)
4 +
=
+
The velocity at the exit of a diffuser:
= [
+ 2
(
-
)
= [
+ 2 x 1000 x 1.007 x (30-90)
= 81.29 m/s
therefore, the velocity at the exit of a diffuser is 81.29 m/s
Answer:
Exit velocity = 498.3m/s
Explanation:
The energy balance for the system is given by:
Ein - Eout = ◇Esystem
Ein = Eout
Therefore
m' (h1 + V1^2/2) = m' (h2 + V2^2/2)
h1 + V1^2/2 = h2 + V2^2/2
The exit velocity will be:
V2 = [V1^2 + 2(h1 - h2)^0.5 = [V1^2 + 2(cp(T1 - T2)]^0.5
But cp = 1.007kJ/kg
V2 = [(357)^2 + 2(1.007)(90-30)(1000m^2/s^2)]^0.5
V2 = [127449 + 120840]^0.5
V2 = [248289]^0.5
V2 = 498.3m/s
Answers
H2SO4 sulfuric acid
inclined plane AND pulley
B)
lever AND wheel-and-axle
C)
pulley and lever
D)
wheel-and axle AND inclined plane