Calculate the planetary phase angle (counterclockwise from earth, a = 1.0 au) that a probe may correctly complete a hohmann transfer orbit to venus (a = 0.7 au).

60.85° counterclockwise

Explanation:

Data provided in the question:

a₁ = 1.0 AU

a₂ = 0.7 AU

Now,

The phase angle ( α ) is calculated using the formula

α =

on substituting the respective values, we get

α =

or

α = -1.062 radians

Here, the negative sign depicts the counterclockwise direction

Now,

1 radian = degrees

therefore,

-1.062 radians = -1.062 × degrees

or

-1.062 radians = -60.85°

Hence,

The planetary phase angle between them is 60.85° counterclockwise

b would be the answer

the box does not move because you need to use a force greater than 300 n. you are only using 50 n. it needs to at least be 301 n for the box to move because then it is an unbalanced force and it will move the way that the greater force is pushing it. if you use only 300 n it will be a balanced force and will not move because the force you are exerting on the   box is the same as its force.

hope this !

im sorry if i went too in depth, i am going to include a link to a video on khan academy that will explain this.   hope that you like the video and that it explains more in detail to you.

that is the link.