By a direct knowledge of mass and radius of a star it is straightforward to compute also the gravity, but unfortunately this is possible only in a few cases. For most stars, the only chance we have to infer the surface gravity is based on the analysis of spectral features: lines and ...
Usinggravimeters,highlyaccuraterelativemeasurementscanbemadeatagivensite,knownasagravitystation,inhalf-an-hourorless.利用重力仪，可以在半小时或更短时间内，在给定点，如重力测站，进行高精度的相对测量。Sincerelativegravitysurveyscandetermineonlydifferencesingravityfrompointtopoint,everyrelativegravitysurveymustinclude...
The device most often use to determine the specific gravity of a fluid when its value is unknown is called a hydrometer. These come in a number of forms, but the basic construct is a tube weighted at the bottom so that it will sink to a certain point in the test fluid, which...
1. The Density of liquid water is 0.997, so if we weigh a glass of water and then weigh the glass of water after adding a substance, we can determine the Density of water by the following formula: Water weight - water weight + substance 2. The specific gravity of solids and liquids ...
C has a density of 0.9982 g/ml. Water at 30 C has a density of 0.9956 g/ml. These differences of tenths of a percent may seem trivial on the surface, but when you want to determine the density of a substance with great precision, you really have to resort to using specific gravity...
To determine the acceleration you experience in a corner, all we need is the radius of the corner and your speed. I measured the radius of a normal right turn at an intersection of two four-lane roads and found it to be about 17 metres. This means that if it went through this corner...
The CYPRES computer takes a measurement of air pressure on the ground and uses this to determine the skydiver's altitude throughout the day. Whenever the skydiver is on the ground, the unit recalibrates every 30 seconds to handle weather-based changes in atmospheric pressure. Getting Into Sky...
Rather than a moon, Venus has a quasi-satellite or quasi-moon. While a traditional moon orbits a planet, a quasi-satellite stays close to a planet while orbiting the Sun. In this case, it has a more oblong orbit than Venus, which doesn't exert enough gravity to hold the asteroid in ...
For proper operation, drones usually use accelerometers to determine the direction of gravity. In a new study published in Nature on October 19, 2022, a team of scientists from Delft University of Technology, the CNRS and ...
The Redwood Genome Project led scientists to determine that coast redwoods did not originate as a hybrid of other tree species, but rather evolved linearly from a single ancestor far in the past, with the coast redwood containing hundreds of unique genes not found in any other conifer. These ...