If you are in an airplane. you look out the window and the clouds appear to be moving. what is your frame of reference? a.) airplane b.) clouds c.)ground d.)window

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If steel is more dense that lake water, why can a boat float

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