What two factors affect pressure? Area and force are the two factors on which pressure depend. What happens to the volume when the pressure doubles? For a fixed mass of gas at constant temperature, the volume is inversely proportional to the pressure. That means that, for example, if you double the pressure, you will halve […]
What percentage is 12 out of 24?
Why is selling moon rocks illegal?
Why is selling moon rocks illegal? A lunar meteorite is a piece of the Moon. This is why many people think that owning a Moon Rock is illegal – because the Apollo samples are illegal to own by private citizens. Apollo Moon Rocks are NASA and US government property which cannot be sold or exchanged […]
What are the natural causes of extinction?
What are the natural causes of extinction? Extinction occurs when species are diminished because of environmental forces (habitat fragmentation, global change, natural disaster, overexploitation of species for human use) or because of evolutionary changes in their members (genetic inbreeding, poor reproduction, decline in population numbers). What’s the difference between extinction and mass extinction? Background extinction […]
How do I calculate the coefficient of friction?
How do I calculate the coefficient of friction? The formula to calculate the coefficient of friction is μ = f÷N. The friction force, f, always acts in the opposite direction of the intended or actual motion, but only parallel to the surface. What is the coefficient of friction for steel? The coefficient of static friction […]
Why do trains blast their horns at night?
Why do trains blast their horns at night? A long signal is sounded when approaching stations, railroad crossings at grade, and movable bridges. These are to warn other personnel that a train is approaching. If an engineer sees inattentive people or livestock on or near the tracks, he will sound a series of short horn […]
What will happen to the Great Rift Valley in Africa eventually?
What will happen to the Great Rift Valley in Africa eventually? Eventually, it will rupture, leading to the formation of a rift valley. This process is accompanied by surface manifestations along the rift valley in the form of volcanism and seismic activity. Rifts are the initial stage of a continental break-up and, if successful, can […]
Why the optical mirrors are mounted externally from laser tube?
Why the optical mirrors are mounted externally from laser tube? A laser tube is mounted on an optical bench so that one of its end mirrors is mounted externally to the tube on an optical bench sliding holder. Careful alignment of the external mirror starts the lasing action, as long as the open part of […]
Is current Lorentz invariant?
Is current Lorentz invariant? In particular, the charge carried by a particle does not vary with the particle’s velocity. is called the proper density, and is obviously Lorentz invariant. is the current density 3-vector. Clearly, charge density and current density transform as the time-like and space-like components of the same 4-vector. What is the difference […]