A magnetic field is a force field, invisibly pushing electrically charged objects just as a gravitational field pulls objects with mass. Whereas all objects with mass exert a gravitational field, however, not all objects have a magnetic field. Magnetic fields are created by electrical charges. Thanks to their structure at the atomic level, some substances -- like the iron in magnets -- have a permanent magnetic field.
Answer:
B.
Explanation:
Causes mutations in DNA.
The signature mutation caused by ultraviolet light is a CC to TT mutation, caused when a CC dimer is mispaired with two adenine bases during replication. Because of these mutations, the connection between ultraviolet damage to DNA and cancer is quite clear.
Answer:
Good nutritional habits are important to live a long and healthy life. Unhealthy eating habits like having too much sugar, salt, or fat in your diet can raise your risk for certain diseases. Not eating enough or eating too much both have different effects. Healthy eating can lower your risk for heart disease, stroke, diabetes, and other health conditions. A well balanced diet that satisfies your needs is sure to improve your way of life.
Explanation:
kinda just re-worded the stuff I saw on google
They are feeling weightless because there is no external contact force pushing nor pulling upon their body, in each case gravity is the only force acting upon their body.