Pls help A spacecraft leaves the solar system at a velocity of 1,500 m/s. The net force on

this spacecraft is zero. What can we say about the spacecraft's acceleration?

A. It must be zero

B. It has to be slightly positive or the spacecraft will slow down and stop.

C. It has to be slightly negative or the spacecraft will slow down and stop.

D. We don't know the acceleration without more data.

In which situation has the independent variable for the experiment been changed? check all that apply. changed from counting the number of duckweed at day 0 and day 14 to counting them every day changed from testing duckweed growth in beakers to testing duckweed growth in large outdoor tanks changed from testing the effect of ph on duckweed growth to testing the effect of light levels on duckweed growth changed from testing the effect of acid ph on duckweed growth to testing the effect of basic ph on duckweed growth

An automobile steering wheel is shown. what is the ideal mechanical advantage? if the ama is 8, what is the efficiency of the steering wheel?

Avector of magnitude 2 cannot be added to a vector of magnitude 3 so that the magnitude of the resultant is a. zero b. 1 c. 3 d. 5 e. 7