the barometric height at sea level is 76cm of Mercury while at a point of Mercury on a highland it is 74 cm of mercury .what is the altitude of the ?(take g 10m/s² density of mercury 13600kg/m³ and density of air is 1.25kg/m³​

Name three different units of energy used to measure heat and describe what type of situations each is usually used.

Aperson walks first at a constant speed of 4.89 m/s along a straight line from point a to point b and then back along the line from b to a at a constant speed of 2.95 m/s. what is the average speed over the entire trip?

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