a boy is about to cross over a rail way but unfortunately a 300m long train arrived and passed by him. how long does he need to wait to cross?​

Explain the consequences of this addiction to the brain tissue

Isla’s change in velocity is 30 m/s, and hazel has the same change in velocity. which best explains why they would have different accelerations? isla had negative acceleration, and hazel had positive. isla had a different time than hazel. isla had positive acceleration, and hazel had negative. isla went a farther distance than hazel.

Science and technology are interdependent. advances in one lead to advances in the other. give an example of this phenomenon.