Arock with a mass of 0.3 kg falls from the top of a cliff. if it takes the rock 2.5 s to reach the ground, what was the impulse on the rock during the fall?

What’s #16 asking me and how do i solve it?

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

Why is a noble gas different from other elements