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).
(a). 6.626 x 1026 (b). 4186 (c). 3.00 x 108 (d).It depends on wavelength Explanation: The speed of light (electromagnetic radiation) through vacuum has a constant value of 3.00 x 108 m/s and is independent of the wavelength in vacuum.