In 2004 astronomers reported the discovery of a large jupiter-sized planet orbiting very close to the star hd 179949 (hence the term "hot jupiter"). the orbit was just 19 the distance of mercury from our sun, and it takes the planet only 3.09 days to make one orbit (assumed to be circular). what is the mass of the star? express your answer (a)in kilograms and (b)as a multiple of our sun's mass.

Which explanation describes the forces involved for a person to walk down the sidewalk? a. the person's feet push backward on the sidewalk; the sidewalk pushes backward on the person. b. the person's feet push forward on the sidewalk; the sidewalk does not push on the person. c. the person's feet push backward on the sidewalk; the sidewalk pushes forward on the person. d. the person's feet push forward on the sidewalk; the sidewalk pushes forward on the person.

Acapacitor is storing energy of 3 joules with a voltage of 50 volts across its terminals. a second identical capacitor of the same value is storing energy of 1 joule. what is the voltage across the terminals of the second capacitor?

Describe cytokinesis in plants and animals. in animals: in plants.