what is the si unit of k so that the equation: velocity = k × density is dimensionally correct? give answers in base units

What is the scientific definition of energy that relates to work

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

Dao makes a table to identify the variables used in the equations for centripetal acceleration. what quantities belong in cells x and y?