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).
All types of electromagnetic radiation: are transverse waves; travel at the same speed in a vacuum - empty space. The speed of electromagnetic radiation in a vacuum is 299,792,458 m/s. This is approximately three hundred million metres per second - nearly nine hundred thousand times faster than sound, which is why you see a flash of lightning before you hear the thunder.