Which of the following is most useful to scientists in measuring the size of asteroids?

the speed at which the asteroid is traveling.
the location of the asteroid in the solar system.
the gravitational effect when spacecraft flies close to the asteroid.
the composition of the asteroid.

In a citizens elect the president as head of government separately from the legislature. question 1 options: parliamentary democracy communist state presidential democracy autocratic state

Chen's research team randomly assigned some newborns and their mothers either to a breastfeeding promotion group (where breastfeeding was encouraged, but not required) or to a normal pediatric care group (where breastfeeding was neither encouraged nor discouraged). which research method did they use?

Which supreme court dressed the second a. presser v. illinois b. quilici v. the village of morton grove c. united states v. cruikshank d. united states v. miller