Asked by Roger
1. A typical virus is a packet of protein and DNA or RNA and can be spherical in shape. The influenza A virus is a spherical virus that has a diameter of 85nm. If the volume of saliva coughed on to you by a friend with the flu is .010cm^3 and 10^-9 of that volume consists of viral particles, how many influenza viruses have just landed on you?
2. Keplar's Law of planetary motion says that the square of the period of a planet(T^2) is proportional to the cube of the distance of the planet from the sun (r^3). Mars is about twice as far from the sun as venus. How does the period of mars compare with the period of venus?
2. Keplar's Law of planetary motion says that the square of the period of a planet(T^2) is proportional to the cube of the distance of the planet from the sun (r^3). Mars is about twice as far from the sun as venus. How does the period of mars compare with the period of venus?
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