What is Hard: Definition and 1000 Discussions

Hard rock or heavy rock is a loosely defined subgenre of rock music typified by a heavy use of aggressive vocals, distorted electric guitars, bass guitar, and drums, sometimes accompanied with keyboards. It began in the mid-1960s with the garage, psychedelic and blues rock movements. Some of the earliest hard rock music was produced by the Kinks, the Who, the Rolling Stones, the Yardbirds, Cream and the Jimi Hendrix Experience. In the late 1960s, bands such as the Jeff Beck Group, Iron Butterfly, the Beatles, Led Zeppelin, Golden Earring, Steppenwolf and Deep Purple also produced hard rock.
The genre developed into a major form of popular music in the 1970s, with the Who, Led Zeppelin and Deep Purple being joined by Aerosmith, Kiss, Queen, AC/DC and Van Halen. During the 1980s, some hard rock bands moved away from their hard rock roots and more towards pop rock. Established bands made a comeback in the mid-1980s and hard rock reached a commercial peak in the 1980s, with glam metal bands such as Bon Jovi and Def Leppard and the rawer sounds of Guns N' Roses which followed with great success in the later part of that decade.
Hard rock began losing popularity with the commercial success of R&B, hip-hop, urban pop, grunge and later Britpop in the 1990s. Despite this, many post-grunge bands adopted a hard rock sound and the 2000s saw a renewed interest in established bands, attempts at a revival, and new hard-rock bands that emerged from the garage rock and post-punk revival scenes. Out of this movement came garage rock bands like the White Stripes, the Strokes, Interpol and later the Black Keys. In the 2000s, only a few hard-rock bands from the 1970s and 1980s managed to sustain highly successful recording careers.

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  1. R

    Basis, kernal, image, transformation, etc (not a hard one)

    I hope everyone could understand my matrix notation! T: M22 -----> M22; T[a b; c d] = [a+b b+c; c+d d+a] I found the the basis for ker(T) to be [1 -1; 1 -1] im having problems finding a basis for im(T)? I know that it has to be dim3! so far i have: im(T) = {[a+b b+c; c+d d+a]/ [a b...
  2. I

    I have a hard time recognizing transformations of functions.

    hello everyone can anyone give me any tips on recognizing compressions and expansions of functions? ie. vertical expansion, horizontal compression
  3. -Job-

    What is the Computational Complexity of Rearranging a Crossword Puzzle Grid?

    Given an n*n crossword puzzle grid composed of n^2 boxes (black and white), consider the problem of determining the size of the biggest square composed entirely of black boxes that can be created by first rearranging the rows and then the columns. Determine the smallest k such that O(n^k) is...
  4. D

    Can You Solve These Challenging Partial Differentiation Problems?

    HI GUYS i just have some hard problems on partial differentiation... hope you guys can help out 1. find "day z / day y" its the funny backwards 6 symbols instead of the normal differntiation symbole if z=4y^3 * sqrt(x) - ln(4xy^3) + 2x i did this: i diffenriated 4y^3 * sqrt(x) with...
  5. M

    How to Use Implicit Differentiation to Solve for y' in xy^1/2 = 1 + x^2y

    How do I correctly differentiate this using implicit differentiation: xy^1/2 = 1 + x^2y I got to here before I started wondering how I would properly isolate y': ((1/2xy)^-1/2)y + y'x = 2xy + x^2y' How far off the beaten path...
  6. I

    Torque and Force Equilibrium in a Rotating Plank

    I have soluted these so but I need an explanation of what I've done. An even 2,23m long plank is turn-able around its one end. The plank is hold up in an horisontial way with a vertical upp-force on 268 N The force works at 1,52 from the turn-able point. Decide the planks mass. What I did...
  7. I

    How Do You Calculate Backward Power and Forces in Physics Problems?

    A competition-cyclist closing the goal. Towards the end-rush she raises her speed from 12m/s to 20m/s on 6.5s. The Cyclist and the cycles masses are together 70kg. Calculate acceleration The accleration is 1,23 no problem i calculated that but the next question is hard. The Cyclist pushes...
  8. B

    Mastering Kirchhoff's Law: Solving for 5 Currents in a Complex Circuit

    The point is to find currents i1,2,3,4, and 5 in the picture. R1 = 14 Ohms R2 = 6 Ohms This is my work so far. 5 Currents, 5 Loops, 5 Equations, that is the rule (or so I think) The way I am looking at it, there are 6 Loops, so if someone could reduce it to 5 that'd be of some help...
  9. T

    Hard word prob involving cars (HELP ME)

    Ok, here is the prob. You are arguing over a cell phone while trailing an unmarked police cruiser by 25m; both you and the cruiser are traveling at 110km/h. Your argument diverts your attention from the police cruiser for 2.0s (long enough to look at the phone and yell "I won't do that!"). At...
  10. Norman

    How to attract more women to hard sciences?

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  11. H

    Relativity question for Hard SciFi writing

    I'm working on writing some hard science fiction stuff, and I have a question I was hoping you guys could help me with. See, my training is primarily in math and chemistry, and it's been quite some time since I've really had any dealings with more than just the most basic concepts in general...
  12. M

    Projectile Motion Problem. Very HARD

    Well... for me. A Basketball Star covers 2.80m horizontally in a jump to dunk the ball. His motion through space can be modeled as that of a particle at a point called his center of mass. His center of mass is at elevation 1.02 m when he leaves the floor. It reaches a maximun height of 1.85...
  13. I

    Solve a Challenging Kinematics Question: Depth of a Shaft after 6.2 seconds

    I was wondering how u solve this kinematics question: a banana peel is dropped from rest down a shaft. 6.2 s later the sound of the banana hitting the ground is heard. how deep is the shaft i think: v1= 0m/s a=9.8m/s^2 i'm reallu stuck on this one.. don't know where to go from here.
  14. H

    Hard physics Relativity homework

    Two space ships (F and M) start at point x=x'=0 and t=t'=0. F stays put while M takes off in the x direction at 0.6c. After 350 min on F's clock, M turns around and heads back (assuming instantly). 350 more min on F's clock and M is back at start. T = 700 min. calculate time t' that has...
  15. K

    Can the Vector Sum OC Lie on, Inside, or Outside the Circle?

    Hard Vector Question Much Help Needed! Points A and B are any two points on a cirlce with a center O. The heads of Vectors OA and OB lie on the circle. Vector OC is the sum of OA and OB . In the Diagram, the head of OC lies outside the circle. Explain your answer to each question. a.)Is it...
  16. D

    How Can I Convert My Old Laptop Hard Drives into External Hard Drives?

    I have three laptops which no longer work. I want to take the hard drives out of them and make external hard drives for my new laptop. What do I need to do? I have no idea where to even start.
  17. V

    Defining Matter: Can You Help Me Generate Ideas?

    Care to venture ideas? i need some...
  18. B

    Is Punishment Justifiable Under Hard Determinism?

    *It is often held that punishment under pure (hard?) determinism is irrational as the criminal had "no free choice" NoT to commit a crime, and cannot thus be held responsible. Of course, I will have to cite my sources for this statement (no doubt about it!), but moving on... But, why must...
  19. Les Sleeth

    Is Archaeology More of a Hard Science than a Social Science?

    With the development of scientific techniques, archaeology has become more than digging for artifacts and buried communities. It seems to have become a broader field sometimes generalized as prehistory. An argument a historian friend of mine and I have had is over the importance of prehistory...
  20. D

    Projectory: Super Hard Apparently From The Military Gah Hard

    Projectory: Super Hard Apparently From The Military! Gah Hard hey all i got a very difficult question, apparently some guy from the military working with projectory wrote this and below is the questions and i could not do sections 7 & 8 at all below i have posted my answers not sure if theya...
  21. J

    State space system model derivation - hard and really fast - PLEASE

    State space system model derivation - hard and really need help fast - PLEASE! Hi, Just found this site (a little too late I fear!). I have an assignment due tomorrow and I can not solve the last part of it. We are able to source information from anywhere to complete the assignment and you...
  22. J

    State space system model - hard and really fast - PLEASE

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  23. D

    How to Find Vector Components and Parametric Equations for Plane Intersections?

    hi all got some problems with vectors so waswondering if anyone can check what I've done is correct thanks question1. find the vector component of 2i+j-k in the direction of i-3j+2k basically i use the rule a=(v*w^)*w^ w^= i-3j+2k / sqrt(14) thus v=2i+j-k therefore a=(2i+j-k)*(...
  24. Evo

    Why are parents putting so much pressure on their kids?

    My daughter is a bit distressed, she got a call yesterday from a friend to tell her that a girl they knew had just stabbed her mother to death. My daughter's best friend had been the girl's debate mentor last year. She was a nice, intelligent girl, but was known to do drugs and party hard...
  25. D

    Can Boolean Algebra Simplify Complex Logical Expressions?

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  26. U

    Troubleshooting Hard Disk Reformatting Issues

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  27. R

    What Is the Minimum Tension Needed to Move a Toaster on a Countertop?

    This one's not too hard...A 1.30kg toaster is not plugged in. The coeffficient of static friction b/t the toaster and horizontal countertop is .350. To make the toaster start moving, you carelessly pull on its electric cord. a) for the cord tension to be as small as possible, you should pull...
  28. J

    How can I uninstall Windows 2000 and keep Windows XP on my computer?

    I purchased my father a computer that had windows 2000 on it. He wanted me to upgrade it to xp, so I purchased a windows xp oem disk from new egg. I installed it on the computer. I thought that it would simple upgrade to xp, but now windows xp and 2000 are on his computer simultaniously! When...
  29. K

    Magnetising a hard magnetic material

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  30. R

    Hard Drive Problem: Troubleshooting a Quamtun Bigfoot 6.5 Gb

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  31. Astronuc

    Our Hard Drive Which art internal Volume C by name

    Our Morning Prayer :biggrin: Our Hard Drive Which art internal Volume C by name; Thy code be clean, Thy fonts be seen On screen as they are on paper. Give us this day our documents, And lead us not into fragmentation But deliver us our data. For thine is the SCSI, And the EISA...
  32. T

    VERY hard integral (atleast to me)

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  33. Z

    How to find properties of root hard disk?

    Start Windows Explorer, right-click the computer's root hard disk, and then click Properties how do I find the computer's root hard disk in order to righ click on it?
  34. C

    Windows XP Pro Hard Drive Space Limit: 250GB?

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  35. I

    Can This Hard Integral Problem Be Solved With Complex Numbers?

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  36. Ivan Seeking

    Music Greatests hard rock vocalists and musicians

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  37. D

    Solving a Hard Math Question: Volume of Concentrated Orange Juice

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  38. D

    Chemistry is so hard to understand when you're bored and tired

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  39. I

    What Does Solving Sqrt[7]^2 == r^2 + r^2 - 2 * r * r * Cos[2 * Pi / 3] Involve?

    I have no idea how to do this problem can you guys shed some light? Sqrt[7]^2 == r^2 + r^2 - 2 * r * r * Cos[2 * Pi / 3] Thanks.
  40. D

    Solving Thermal Physics Questions: Q1 Calorimeter & Q2 Ice & Water

    hi there guys I am doing a thermal physics question and its hard please help me and point me in the right directions please thanks. question 1 A 50g copper calorimeter contains 250g of water at 20degrees celsius how much steam must be condensed into water if the final temperature is to...
  41. D

    Solving Hard Chemistry Equations

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  42. S

    Solve Hard Logic: Who Knows Their Hat Color?

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  43. P

    Building External Hard Drive (Time Crunch)

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  44. A

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  45. B

    How Long Did It Take to Build Brightvale Castle?

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  46. R

    Having a hard time with a derivative

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  47. D

    I Find This Very Hard Can Somebody Check This Out

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  48. N

    Calculating Distance: 12 kg Object with 24 J Kinetic Energy and 6 N Force

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  49. T

    Hard Q to take a derivative of

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