query: Why can we only add or subtract things of the same dimension (meters/second, newtons, etc)?
positive_passages.docid: 123621
positive_passages.text: What justifies dimensional analysis?
negative_passages.docid: 35331
negative_passages.text: How can an object's instantaneous speed be zero and it's instantaneous acceleration be nonzero?
negative_passages.docid: 30683
negative_passages.text: $F=ma$ calculation taking relativity into account?
negative_passages.docid: 61540
negative_passages.text: Why is current a scalar quantity?
negative_passages.docid: 115295
negative_passages.text: Why are the two dot product definitions equal?
negative_passages.docid: 8545
negative_passages.text: Calculating length contraction at speed $c$ (not near it)
negative_passages.docid: 115511
negative_passages.text: Why do we invert then multiply when dividing fractions?
negative_passages.docid: 67369
negative_passages.text: Why can't decimal numbers be represented exactly in binary?
negative_passages.docid: 55890
negative_passages.text: Why do we use cross products in physics?
negative_passages.docid: 125883
negative_passages.text: Moment of inertia: why $\mathrm{dI}=r^2\mathrm{dm}$ instead of $\mathrm{dI}=m\mathrm{dr^2}$?
negative_passages.docid: 135727
negative_passages.text: Error Measures, why is the sum halved? why not use the absolute value?
negative_passages.docid: 42045
negative_passages.text: Decimal vs Double Speed
negative_passages.docid: 104158
negative_passages.text: $\frac 00=$ ? Why It is un answerable?
negative_passages.docid: 75218
negative_passages.text: Unit of torque with radians?
negative_passages.docid: 67609
negative_passages.text: How is acceleration measured if there is change only in the direction of velocity & not magnitude?
negative_passages.docid: 10129
negative_passages.text: Place each foot on a scale: can you add the two to find your weight?
negative_passages.docid: 123418
negative_passages.text: Laws of addition of Vectors