Article: Enter your crush’s first and last name, along with a few identifying details to narrow the search -- for instance, their hometown, school, or workplace. If you don’t know their full name or don’t have any identifying details, you may have to sort through several pages of search results. Try switching to Google Images to see if any pictures of your crush come up. If you have access to a picture of them, like a Facebook profile pic, you can  do a screen capture and search for their picture online. Click the camera icon on the Google Images home page and upload your screen capture, and Google will look for matches online. If your Google search comes up short, or if you’re still looking for additional information, you might want to try a search engine designed specifically for looking up people. Pipl, 123People and PeekYou are some specialized search engines that may be useful. Be aware that you can’t believe everything these search engines pull up. If you find any information that seems unlikely or doesn’t add up, keep in mind that it could be inaccurate. It’s easiest to find someone on Facebook if you know their first and last name, or if you have mutual friends on Facebook. How much you can see of their profile will vary depending on what their privacy settings are. However, you can also search for “[their name] + photos,” which will show you other people’s photos that they are tagged in. Instagram is a little harder to find people on, unless you happen to know their Instagram handle. If you have mutual friends, try looking at your friends’ followers to see if you can spot them. If you found their Facebook profile, you can look for Instagram photos in their Photos section, which should link to their Instagram account. You won’t necessarily find a lot of personal information on Twitter, but reading your crush’s tweets may give you an idea of what they care about and what their sense of humor is like. This is also easier if you happen to know their handle, as many people don’t use their real names on Twitter. Try looking at mutual friends’ followers again, or search for their Instagram handle if you know it, as it may be the same as their Twitter handle. You can learn a lot about someone from what kind of music they like, and you may be able to see what they’ve listened to most recently or what playlists they have. it will also give you a chance to see if you like any of the same bands, which could be a great conversation starter. If you do decide to talk to them about bands you both like, don’t let on that you already know what they listen to. Find a natural way to bring it up in conversation, like, “I can’t stop listening to this new album by the National. Have you heard of them?” While whatever information you might find online about your crush is technically public, they may not appreciate having details about their life shared with people they don’t know very well. Keeping these things to yourself can also save you the embarrassment of having to admit to your crush that you were looking them up!
Question: What is a summary of what this article is about?
Start with a simple Google search. Try a search engine that’s just for people. Look up their Facebook profile. Find their Instagram account. Search for them on Twitter. Check out their Spotify profile. Keep what you learn about your crush to yourself.

To get an object's instantaneous velocity, first we have to have an equation that tells us its position (in terms of displacement) at a certain point in time. This means the equation must have the variable s on one side by itself and t on the other (but not necessarily by itself), like this:s = -1.5t2 + 10t + 4 In this equation, the variables are:   Displacement = s . The distance the object has traveled from its starting position. For example, if an object goes 10 meters forward and 7 meters backward, its total displacement is 10 - 7 = 3 meters (not 10 + 7 = 17 meters).  Time = t . Self explanatory. Typically measured in seconds. The derivative of an equation is just a different equation that tells you its slope at any given point in time. To find the derivative of your displacement formula, differentiate the function with this general rule for finding derivatives: If y = a*xn, Derivative = a*n*xn-1.This rule is applied to every term on the "t" side of the equation. In other words, start by going through the "t" side of your equation from left to right. Every time you reach a "t", subtract 1 from the exponent and multiply the entire term by the original exponent. Any constant terms (terms which don't contain "t") will disappear because they be multiplied by 0. This process isn't actually as hard as it sounds — let's derive the equation in the step above as an example:s = -1.5t2 + 10t + 4(2)-1.5t(2-1) + (1)10t1 - 1 + (0)4t0-3t1 + 10t0-3t + 10 " To show that our new equation is a derivative of the first one, we replace "s" with the notation "ds/dt". Technically, this notation means "the derivative of s with respect to t." A simpler way to think of this is just that ds/dt is just the slope of any given point in the first equation. For example, to find the slope of the line made by s = -1.5t2 + 10t + 4 at t = 5, we would just plug "5" into t in its derivative. In our running example, our finished equation should now look like this:ds/dt = -3t + 10 Now that you have your derivative equation, finding the instantaneous velocity at any point in time is easy. All you need to do is pick a value for t and plug it into your derivative equation. For example, if we want to find the instantaneous velocity at t = 5, we would just substitute "5" for t in the derivative ds/dt = -3 + 10. Then, we'd just solve the equation like this:ds/dt = -3t + 10ds/dt = -3(5) + 10ds/dt = -15 + 10 = -5 meters/second Note that we use the label "meters/second" above. Since we're dealing with displacement in terms of meters and time in terms of seconds and velocity in general is just displacement over time, this label is appropriate.
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One-sentence summary --
Start with an equation for velocity in terms of displacement. Take the equation's derivative. Replace "s" with "ds/dt. Plug in a t value for your new equation to find instantaneous velocity.