Why do scientists describe the theory of gravity as incomplete quizlet?
Why do scientists describe the theory of gravity as incomplete quizlet?
Why do scientists describe the theory of gravity as “incomplete”? It does not incorporate a description of matter on a very small scale. where the current understanding of gravity is incomplete. the unseen companion in the system must have a sufficiently high mass.
What is the evidence for dark matter in our galaxy quizlet?
The primary evidence for dark matter is that calculations show that many galaxies would fly apart instead of rotating, or would not have formed or move as they do, if they did not contain a large amount of matter beyond what can be observed.
What is the evidence of dark matter?
Primary evidence for dark matter comes from calculations showing that many galaxies would fly apart, or that they would not have formed or would not move as they do, if they did not contain a large amount of unseen matter.
Why do we believe there is dark matter?
Scientists believe that dark matter may account for the unexplained motions of stars within galaxies. Computers play an important role in the search for dark matter information. They allow scientists to create models which predict galaxy behavior. Satellites are also being used to gather dark matterinformation.
What is the fastest particle?
tachyon
Can neutrinos kill you?
If you observed a supernova from 1 AU away—and you somehow avoided being being incinerated, vaporized, and converted to some type of exotic plasma—even the flood of ghostly neutrinos would be dense enough to kill you. If it’s going fast enough, a feather can absolutely knock you over.
Is there a cobalt bomb?
A cobalt bomb is a type of “salted bomb”: a nuclear weapon designed to produce enhanced amounts of radioactive fallout, intended to contaminate a large area with radioactive material. Such “salted” weapons were requested by the U.S. Air Force and seriously investigated, but not deployed.
What can block neutron radiation?
Lastly, Neutron radiation consists of a free neutron, usually emitted as a result of spontaneous or induced nuclear fission. Able to travel hundreds or even thousands of meters in air, they are however able to be effectively stopped if blocked by a hydrogen-rich material, such as concrete or water.
What material can block radiation?
Despite their ability to penetrate other materials, in general, neither gamma rays nor x-rays have the ability to make anything radioactive. Several feet of concrete or a few inches of dense material (such as lead) are able to block these types of radiation.
What is the most dangerous type of ionizing radiation?
Gamma rays are the most harmful external hazard. Beta particles can partially penetrate skin, causing “beta burns”. Alpha particles cannot penetrate intact skin. Gamma and x-rays can pass through a person damaging cells in their path.
What are the 7 types of radiation?
The EM spectrum is generally divided into seven regions, in order of decreasing wavelength and increasing energy and frequency. The common designations are: radio waves, microwaves, infrared (IR), visible light, ultraviolet (UV), X-rays and gamma rays.
What are the three major types of ionizing radiation?
There are three main kinds of ionising radiation:
- alpha particles, which include two protons and two neutrons.
- beta particles, which are essentially electrons.
- gamma rays and x-rays, which are pure energy (photons).