Web$\begingroup$ @explorest: The confusion here comes from the language rather than the mathematics. When you say "the square root of $49$", you don't really mean what you say: $49$ has two square roots, namely $7$ and $-7$. You could say "the square roots of $49$ are $\pm 7$" and that would be fine; but otherwise saying "the square root of $49$" … WebHere’s a possible explanation. “30+” implies a range of values between 30 and 40. This is the convention for the idea being expressed here. In essence, it’s saying “more than 30 and less than 40.”. ”+30” implies a comparison to a number that …
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WebMay 24, 2024 · $\begingroup$ @Hawkingo, If you're bringing a positive test charge from vicinity towards a positive charge at the origin, then $\vec{F}$ (the force due to the electric field) points away from the origin, in the opposite direction of your motion. So $\vec{F}\cdot d\vec{s}$ is negative, and you need the negative sign in front of the integral to get the … WebSep 25, 2024 · This makes $\sqrt{x^2} = \sqrt{(-x)^2}$ because before you can take the root, you need to simplify the inside, deleting its "past". If we wanted to keep the "past", it would need to come from $\Bbb{R}^n, n > 1$. To do so, it takes only one branch, and mathematicians decided for a variety of reaasons that it would be the positive branch. the smurfs 2 full movie online
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WebDec 6, 2024 · This has the nice property that our potential energy is positive, but the resulting force is negative and thus attracting. Increasing your height is supposed to increase your potential energy. If you define the potential with a negative sign, then an increase in height would lead to a decrease in potential energy. WebJun 13, 2024 · The only way around this is to use the (-) button provided so that the calculator knows the leading sign is being used to describe the nature of the seven. (i.e. … Web13 hours ago · Specifically, given the negative effect of rising interest rates on marketplace demand, LendingClub anticipates loan originations in the quarter will come in between … the smurfs 2 music