Pregnancy lasts approximately 9 weeks (63 days) in the cat. However, it is not possible to detect pregnancy during the first 3 weeks. An experienced veterinarian may be able to palpate or feel the fetuses in the uterus of a relaxed cat, as the optimal time for pregnancy palpation is about 28-32 days of pregnancy.
Answers. Relevance. Rating Newest Oldest. The speed of electromagnetic waves in vacuum is the speed of light in vacuum because light is an electromagnetic wave: c = 299,792,458 meters per second, exactly (0.670617 billion mph).
The speed of light, like the speed of any wave, is dependent upon the properties of the medium through which it is moving. For the problems in this problem set, the light waves are always moving through air or a vacuum. Unless told otherwise, a value of 2.998x108 m/s should be used for the speed of light.