Kikkerland Magnetic 1 Minute Hourglass

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An hourglass-shaped magnetic field is a natural outcome of gravitationally driven contraction of a plasma that is embedded in a large-scale magnetic field. Self-inductance and high conductivity of the plasma leads to a flux-freezing effect that drags the magnetic field lines inward in the dense contracted regions. Hourglass patterns are evident in theoretical calculations of magnetohydrostatic equilibria (Mouschovias 1976) and in dynamical calculations of collapsing magnetized molecular cloud cores (e.g., Kudoh & Basu 2008, 2011). The first unambiguous observed hourglass pattern in a star-forming region was in NGC 1333 IRAS 4A (Girart et al. 2006). This was measured by submillimeter dust emission that is polarized perpendicular to the direction of the ambient magnetic field. Subsequent dust polarization measurements also show an hourglass pattern in the high-mass star-forming region G31.41+0.31 (Girart et al. 2009). Also, watching the flow of fine sand or any other fine particle seems to have relaxing benefits for the mind and body. This makes it a simple solution to reduce stress and insomnia. Disadvantages Fitting polarization data requires a different approach. Polarization maps, such as the ones published by Girart et al. ( 2006, 2009), only convey the morphology of the field lines, but not the field strength. Thus, fitting can be performed by minimizing the angle between the model magnetic field vectors and the vectors obtained from the polarization data. The kind of white quartz sand found on sparkling, pristine beaches is attractive, but it’s not the best for making hourglasses, as it is too angular and doesn’t flow well. Then simply place the sand in the upper bubble upwards and let gravity take care of the rest. The sand will flow through the small opening left between the two containers until it runs out.

The final product should take the form of two superimposed globes connected by a narrow opening in their middle. The first step in making an hourglass—usually made of glass— is shaping it while it is extremely hot and malleable. This requires the very precise techniques of the glass industry. Figure 4. Plot of the r-component of the model magnetic field at z = 0.26 R. The fitting parameters are k 1 = 0.9549, k 2 = 0.4608, k 3 = 0.6320, R = 3.8918, h = 0.3257, and B 0 = 3.3118. Since the advent of useful timers(silent sand timer = bad idea), the traditional sand hourglass has served a purely ornamental function. The last step is to pour a sufficient amount of fine sand or other particles into the glass according to the desired time interval.

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Each turn of the hourglass has a slightly different result, so you’ll sit, completely mesmerised, as you watch the time run out and wait for the next turn! If only each passing minute could be that entertaining when you’re in a doctor’s waiting room…

But by replacing the sand with iron filings and introducing a magnet, the Magnetic Sand Hourglass has flipped how we view the hourglass on its head (pun city!). Instead of a boring pile of sand, the Magnetic Sand Hourglass creates spiky, craggy structures as the filings fall. Flip it over and place it atop the wooden base with the built-in magnet - Suddenly, something strange happens. The hourglass itself is freestanding, and can be used on it's own as a traditional sand timer as well as on the magnetic base. The rare-earth magnet contained in the base is powerful, and you'll be intrigued by how the ferrous material interacts with the magnetic field. Magnetic Sand Hourglass. A two piece set, featuring a hand blown petite hourglass and metal magnetic base. Comes in a colourful box. Note: actual time kept varies between timers, but is approximately 30 secs. TeachIn addition to their aesthetic appeal, hourglasses also offer a way to better manage time by dividing it into several periods according to the quantity of sand and the size of the piece. In this sense, it can be very useful for parents who want to instill better time management in their children. An awareness of the passage of time Answer: Well, it is made of glass, so we don't recommend juggling with it. But, it's definitely sturdy enough for life on a tabletop or desk. Currently, the most common materials are marble and sand dust. What Advantages and Disadvantages Do Hourglasses Have?

Watching the iron filings pile up like miniature spiky asteroids will certainly capture your attention. A mesmerizing tabletop distraction Originally, an hourglass consists of two superimposed bulbs that are more or less round at the base and take on a narrower shape as they get closer together. The Magnetic Sand Hourglass is a fun desktop diversion, and a great way to limit time. Because of its compact size it can easily be kept on small shelves, desks and tables without taking up too much room. Great for use in the classroom. Keep watching and pretty soon (after one minute to be precise) you're left with a fuzzy ball of iron filings holding the hourglass and the base together.Today, hourglasses are mostly a timeless decorative object to set somewhere on a piece of furniture. Advantages Next comes the design of the protective frame, which can be made up of one or more parts depending on the manufacturer.