How many electrons does sodium have?
O 23
O 12
O 13
O 11

Aferris wheel is a vertical, circular amusement ride with radius 9 m. riders sit on seats that swivel to remain horizontal. the ferris wheel rotates at a constant rate, going around once in 9 s. consider a rider whose mass is 56 kg. at the bottom of the ride, what is the perpendicular component of the rate of change of the rider's momentum? at the bottom of the ride, what is the vector force exerted by the seat on the rider?

Which feature indicates that mars resides in the inner region of the solar system

What is the orbital period of a spacecraft in a low orbit near the surface of mars? the radius of mars is 3.4×106m.