United States or Maldives ? Vote for the TOP Country of the Week !
Passing the earth on their return they will increase the amount of dust-clouds careering round it; and these will be further increased by the action of the ultra-violet rays of the sunlight causing particles to shoot radially away from the earth when the negative charge of the upper atmosphere has reached a certain amount, which particles, although starting sunward, will be swept back to the earth with the oncoming streams.
When the speed reaches a predetermined limit, the plunger A, having its center of gravity slightly displaced from the center of rotation of the shaft, is thrown radially outward and strikes the lever B. It will easily be understood that when the plunger starts outward, the resistance of spring C is rapidly overcome, since the centrifugal force increases as the square of the radius, or in this case the eccentricity of the center of gravity relative to the center of rotation.
Two or three young men displayed what looked like lapis lazuli around their necks, but what turned out at closer quarters to be pieces of a blue china dinner-plate. They had cut out the white interior and then divided the rim radially, the jewels thus formed being all of the same size and shape, with perfectly smooth edges.
To these outer threads, which the spiders strengthened so as to bear a considerable strain by doubling and trebling them, other thinner single threads were then carried radially at irregular distances, like the spokes of a wheel, from a point in the centre, where they were all made fast and connected together.
Since the corpuscles must be supposed to be propelled radially from the sun, few will reach the earth when the latter is over the solar equator in June and December, but when it is over, or nearly over, the spot belts, in March and September, it will be in the line of fire of the more active parts of the solar surface, and relatively rich streams of particles will reach it.
Perhaps the cast net is most commonly used. This is a net which, when fully extended in the water, covers a circular patch about six yards in diameter, while its central part rises in a steep cone, to the peak of which a strong cord is tied. The main strands run radially from this central point, increasing in number towards the periphery. They are crossed by concentric strands.
A pontoon attached to a cylinder may be fitted with an ordinary wet dock; and then the pontoon, before or after the vessel is upon it, can be slewed round to suit the slips up which the vessel has to be moved, supposing the slips are arranged radially. In this case, the pivot end of the pontoon would be a fixture, so to speak, to the cylinder.
If the iron be bent edgewise the breadth of the bar must be added to the diameter, for it is the thickness of the bar measured radially that is to be taken into consideration.
On this table boiler ends up to 8 ft. in diameter can be turned up, the turning tool being carried by a slide rest, which is mounted on the main baseplate, as shown, and which is adjustable vertically and radially. For cutting out flue holes a steel boring head is employed, this head having a round end which fits into the center of the table.
Knowing the force of gravity on a planet, it is easy to calculate the velocity with which a body, or a particle, would have to start radially from the planet in order to escape from its gravitational control. For the earth this critical velocity is about seven miles per second; for Mars about three miles per second.
Word Of The Day