2D refers to objects or images that show only two dimensions; 3D refers to those that show three dimensions. Because reality exists in three physical dimensions, 2D objects do not exist. However, they can be portrayed in images and art.Know More
2D and 3D generally refer to paintings, drawings and computer-generated images. While nothing real truly lacks a third dimensions, items can be depicted without showing a third dimension. The terms are sometimes used to determine whether a depiction of something is presented with clear signs of a third dimension. A drawing with a shadow, for example, might be said to be in 3D.
However, the term is sometimes used to refer to the medium of the depiction. Paintings, photographs and computer images are in 2D by this definition, regardless of what they depict. Sculptures, on the other hand, are in 3D. This distinction is common in the art world.
Further complicating matters are 3D films and drawings. By sending different images to each of the eyes of the viewer, images can simulate the third dimension. These depictions can be accurate, and the effect is enough to fool the brain. However, the depth dimension is only simulated, so some claim that these images are still 2D.Learn more about Particle Physics
Plutonium has 94 protons in its nucleus, compared to the 92 in uranium, and is typically produced in nuclear reactors as a byproduct. Although both plutonium and uranium are rare, naturally occurring elements, plutonium is no longer found in the earth's crust, but uranium is actively mined. There is enough uranium inside the Earth that its radioactive decay is believed to heat the Earth's core.Full Answer >
A sensor is a device that can read and measure input, such as heat, motion, pressure and moisture, from its physical environment and output the results as readable data. Transducers, such as antennas, stereo speakers and thermostats, convert one kind of energy to another. Some devices have both sensors and transducers.Full Answer >
The apical pulse is assessed through a stethoscope placed over the heart, while the radial pulse is typically taken by applying finger pressure to the inner wrist and counting the number of heartbeats. They are the most-common forms of checking a pulse.Full Answer >
The difference between 2-D and 3-D design is that 2-D is flat and has only two dimensions, while a 3-D design allows for depth and rotation. In general, these terms define the difference between a painting and a sculpture. Most of these shape designs are used in geometry.Full Answer >