Ahelicopter flies 250 km on a straight path in a direction 60° south of east. the east component of the helicopter’s displacement is km.

125km

Explanation:

the east component is given by the cosine function of the given angle.

because of the triangle that is formed between the east component end the south-east component

in this case the angle is:

the adyacent Leg is the east component

and the hypotenuse:

so:

we clear for the east component:

you can see the the triangle in the attached image, where the blue line is the east component

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.

where’s the list ? the question is incomplete