Negative-g force is the downward acceleration that produces weight force in the upward direction. For example on a roller coaster, when the acceleration of our body increases more than the free-fall acceleration, we experience an upward force and get a sense of weightlessness due to this negative-g force. This negative-g force is also experienced by pilots while high speed dives. In simple terms, the positive-g force pushes you downwards into the seat while the negative-g force pulls you upwards out of the seat.
Clouds look flat on the bottom because of the process of cloud formation. The condensation of rising moist hot air occurs only above a certain height or altitude called lifted condensation level (LCL). This level defines the flat base of the cloud. As more hot air rises from below, the base of the cloud remains the same while the existing clouds are forced upwards. Thus, this process causes clouds to have a flat bottom and a fluffy top.
According to scientists from Ohio State University, the ice sheets are likely to disappear even if the world’s emission is cut to zero. As per their research, Arctic glaciers are getting warmer at twice rate as compared to the rest of the world for over 30 years. The complete meltdown of these Arctic glaciers will lead to the rise in sea level by approximately 6 meters. This is an alarming situation however, researchers believe that cutting down emissions will slow down the rate of ice loss and delay the damage.
The Source of the world’s longest river Nile was discovered by John Hanning Speke along with James Grant in 1860. John Hanning Speke joined the expedition to Africa in 1854 led by Richard Burton to make a real attempt to discover the origin of the river Nile. At the end of the trip, Speke reached Lake Victoria and thought this might be the source of Nile but Burton strongly disagreed but this expedition failed. In 1860, Speke made another attempt along with James Grant and successfully discovered the source of Nile that is Ripon Falls.
Waves mainly transport energy instead of moving water as they pass through water. Waves cause water to move in a circular path due to which the position of water particles almost remains the same. As the energy of wave passes, the water in the crest of the wave moves in the same direction as the wave, but the water in the trough moves in the opposite direction of the wave. Due to this, water particles move in a circle in the same direction as wave movement. Therefore, water does not move as the wave passes
Things that are faster than sound (343 m/s) are Light (299,792,458 m/s), Muzzle velocity of a bullet (550-1250 m/s), Shock waves (370 m/s), North American X-15 fighter jet (2000 m/s), Space shuttle (8000 m/s), Meteorites (11000-72000 m/s), Satellites (3130 m/s), The surface of the earth at the equator (460 m/s), Speed of earth around the sun (30,000 m/s), And of course the superhero flash (1132 m/s).
A cup has approximately 4,731.76 drops of water. The volume of the drop will depend on the dimensions of the needle or glassware and thus the number of drops will also vary. For example, IV drips used in medicine can deliver 10, 15, 20, or 60 drops per ml. In pharmacy, 0.05 ml is considered as the volume of a drop for usage. Considering 0.05 ml as water drop volume, a cup (236.59 ml) will have approximately 4,731.8 drops of water.
Approximately 5,082 standard 11 inches helium balloons will be required to lift an adult human having a weight of 137 pounds (62 kg). To calculate, we know that helium gas has a lifting force of 1.0715 gram per liter and a standard 11″ balloon has approximately 11.4 liters of volume. Thus, an 11″ helium balloon can lift an object of 12.2 gram (1.0715*11.4). In order to lift a person of 62 kg (62000 gram), 5082 (62000/12.2) 11″ helium gas balloons will be required. The number of helium balloons needs to lift a person = weight (kg) x 82.
The substances that have a pH of 14 are Lithium hydroxide (LiOH), Sodium hydroxide (NaOH), Potassium hydroxide (KOH), Rubidium hydroxide (RbOH), Cesium hydroxide (CsOH), Calcium hydroxide, Strontium hydroxide, Barium hydroxide, Tetramethylammonium hydroxide, and Guanidine. There are few superbases such as Butyl lithium, Lithium diisopropylamide, Lithium diethylamide, Sodium amide, and Sodium hydride which are even stronger bases. The common examples of substances with pH 14 around us are liquid drain cleaner, caustic soda, and lye hair relaxers.
In astrophysics and quantum physics, a jiffy is defined as the time taken for light to travel a distance of one fermi (10^-15 m). Therefore, a jiffy is about 3 × 10^−24 seconds. Also, jiffy is used in electronics in which it is the period of an alternating current power cycle. In UK power supplies, a jiffy is 1/50 of a second while it is 1/60 of a second in North America. Gilbert Newton Lewis (1875–1946) was the earliest person to define technical usage for jiffy.