Question

2 Multiple Choice Questions..
I will give a medall !!!

Answer 1

1) One way that astronomers detect planets around distant stars is by observing to see if there is a _________ in the light that reaches us from a particular star. The reason that the star moves away or toward us is a ________ due to the gravitational effects of the planet.

A. signal, perturbation
B. Doppler shift, perturbation


2) Since Earth is attracted to the sun, why doesn't it fall into the sun?

A. Because it has sufficient tangential velocity
B. Because there is an equal force holding it away from the sun
C. Because it has too much inertia to move toward the sun

Answer 2

1. B :))

Answer 3

and numer 2 i think C :)

Answer 4

thank you ..

Answer 5

yw erin :))

Answer 6

Wait erin, number one is signal :))

Answer 7

first one is B and the second one is also B