The star rho1 cancri is 57 light-years from the earth and has a mass 0.85 times that of our sun. a planet has been detected in a circular orbit around rho1 cancri with an orbital radius equal to 0.11 times the radius of the earth's orbit around the sun. what are
(a) the orbital speed
(b) the orbital period of the planet of rho' cancri?

Atriangle with equal sides of length 10 cm has -2.5-nc charged objects at each corner. part a determine the direction of the electrical force exerted on the object at the top corner due to the two objects at the horizontal base of the triangle. determine the direction of the electrical force exerted on the object at the top corner due to the two objects at the horizontal base of the triangle. horizontally rightward vertically downward vertically upward horizontally leftward