CAN ANYONE PLEASE HELP ME WITH THIS QUESTION

POINTS IF YOUR CORRECT

THANK YOU

Amira pulls a 3 pound wagon 4 feet. how much work has she done?

Assume you measured the mass of the cart to be (500 ± 1) g and the mass of the additional mass you put on the cart to be (500 ± 1) g as well. since the scale you are using in the lab cannot measure objects heavier than 600g you will have to sum up individual pieces and propagate the error. so what would be the mass and the standard error of the cart and the mass

Your science teacher brings in a speaker to talk to your class about climate change. during the session, students ask a few questions. which questions are related to the current evidence on climate change