Unfortunately, these holograms — which exist to make forgery more difficult— aren't very impressive. You can see changes in colors and shapes when you move them back and forth, but they usually just look like sparkly pictures or smears of color. Even the mass-produced holograms that fea...
So, after the weighted tags are attached to the bubbles, each differs very slightly in density (the ratio of mass to volume) from the other bubbles, and the density of all of them is very close to the density of the surrounding water. If you have read this question, then you know ...
This is determined by two factors: how much mass the object has and how far that mass is from the object's axis of rotation. Increasing mass makes an object harder to rotate, as does increasing the distance between the mass and the axis of rotation (a rolled out slab of clay, for ...
consult them each morning before you start your day. Try to figure out where you can combine tasks in order to reduce the amount of energy it takes to get them done. See if you can put some items off until the weekend, when you'll have larger blocks of time available for running erra...
They're still trying to figure out how geologic activity works on modern Mars. The Red Planet doesn't seem to have an Earth-style plate tectonics system. Yet the InSight Mars Lander (a technical marvel made possible by an international spacefaring effort) has recorded more than 1,300 seismic...
We may be looking at teaching from a distance for the indefinite future. I had to figure out how to teach students I'd never meet.
ayou use a translator program which does not give good English 您使用不给好英语的一个译者节目[translate] aCognitive Styles 认知样式[translate] aHow did Magellan and his sailors figure out thedirection to sail 怎么做Magellan和他的水手推测thedirection航行[translate]...
Since it is obviously convenient to have as high a Nuj as possible, a good design choice is to control the slenderness λj = dj/Lj of the channels in such a way that the flow in all of the j branches is within the respective Graetz entry lengths (Figure 5): in other words, Lj =...
All we have to do is figure out how to not move ourselves — since special relativity would ensure we'd be long destroyed before we reached high enough speed — but instead, move the space around us. Easy, right? One proposed idea involves a spaceship that could fold a space-time bubble...
But before we start sending children on an intergalactic school bus ride, we must figure out new ways to accomplish everyday tasks in space, like growing food. International organizations are devoting time and resources to the development of sustaining human life beyond Earth. Some of the space ...