Thermo
This statement of the Second Law says: “It is impossible to convert all heat from a single reservoir into work without any other effect.”
What is the Kelvin–Planck statement?
This dimensionless number compares inertial forces to viscous forces in a fluid and determines the onset of turbulence.
What is the Reynolds number?
This term describes the maximum concentration of a combustible gas or vapor in air above which flame propagation will not occur.
What is the Upper Flammability Limit (UFL)?
This is the nearest star to the Sun.
What is Proxima Centauri?
The derivative of sinx with respect to x.
What is cosx?
A hypothetical machine that violates the Second Law by spontaneously transferring heat from a cold body to a hot body without external work is called this.
What is a Perpetual Motion Machine of the Second Kind (PMM2)?
For laminar flow in a circular pipe, the ratio of maximum velocity to average velocity is this value.
What is 2?
This hazard analysis method gets its name from a piece of clothing and visually links causes to consequences through preventive and mitigative barriers.
What is Bow Tie Analysis?
This theoretical boundary around a black hole marks the point beyond which nothing, not even light, can escape.
What is the event horizon?
This element has the highest electronegativity value on the Pauling scale.
What is fluorine?
This dimensionless number compares the actual coefficient of performance of a refrigerator to the theoretical maximum.(DD)
What is the coefficient of performance ratio (or efficiency ratio)?
In unsteady flow, this type of line represents the locus of all fluid particles that have passed through a given spatial point, often visualized by continuously injecting dye at that point.(DD)
What is a streakline?
This type of fire extinguisher is designed for burning metals like magnesium or titanium, often containing a dry powder agent such as sodium chloride.
What is a Class D fire extinguisher?
This theoretical remnant of the Big Bang is a faint glow of radiation still detectable today.
What is the Cosmic Microwave Background?
The effect that causes spectral lines to shift toward longer wavelengths when a light source moves away from the observer.
What is the Doppler redshift?
This thermodynamic property is defined as the negative partial derivative of Gibbs free energy with respect to pressure at constant temperature.
What is volume?
When the head loss in a pipeline becomes independent of Reynolds number, the flow is in this specific turbulent regime shown on the Moody chart.
What is the fully-rough turbulent (hydraulically rough) regime?
Under GHS, this signal word is used for the most severe hazard categories.
What is “Danger”?
This paradox points out that in an infinite, static universe, the night sky should be completely bright due to the light from infinite stars.
What is Olbers’ Paradox?
This type of bridge, like the Golden Gate, uses cables under tension to support the deck.
What is a suspension bridge?
The locus of points on a P-V diagram where (∂P/∂V)T=0 is called this.
What is the critical isotherm?
In turbulent boundary layers, this “law” relates the dimensionless velocity profile to the logarithm of the dimensionless distance from the wall.
What is the (von Kármán) log law of the wall?
Represented by KG or KSt, this index quantifies the severity explosion in terms of pressure rise rate inside a vessel.
What is the Deflagration-Detonation Index?
This term describes the hypothetical point in the distant future when the universe has expanded so much that no new stars can form, leaving only remnants like white dwarfs, neutron stars, and black holes.
What is the heat death of the universe?
This unit, equal to about 3.26 light years, measures distances to stars beyond the Solar System.
What is a parsec?