1point
a girl turns over a plastic cup so that the open end is facing down, and then
completely submerges it in a pool of water. in doing so, she traps air in the
cup so that both the air and the cup have a volume of 237 cm
approximately how much force must she use to keep the cup from popping
up out of the water, assuming that the weight of the cup and air can be
neglected? (recall that the density of water is 0.001 kg/cm and g = 9.81
m/s2)
o a. 7.5n
o b. 4.6 n
o c. 11.6 n
o d. 2.3 n

from 1609, galileo galilei used the recently invented telescope to observe the sun, moon and planets. he saw the mountains and craters of the moon, and for the first time revealed the planets to be worlds in their own right. galileo also provided strong observational evidence that planets orbited the sun.

his discoveries about the moon, jupiter's moons, venus, and sunspots supported the idea that the sun - not the earth - was the center of the universe, as was commonly believed at the time.galileo turned his gaze toward venus, the brightest celestial object in the sky - other than the sun and the moon.