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 (or sometimes you might see it called velocity) of a wave, v, is how far the wave travels in a certain time. Wave speed is measured in metres per second (m/s). All the electromagnetic waves travel at 300,000,000 metres per second (3 x 10 8 m/s).requency, wavelength, amplitude and wave speed. You need to know about these quantities used in waves-what they mean, the symbols used for them and the units used to measure them. The amplitude, a, of a wave is the distance from the centre line (or the still position) to the top of a crest or to the bottom of a trough.