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.

View More On Wikipedia.org
  1. S

    Why Does the Endolymph Move Opposite to Head Movement in Vestibular Function?

    Vestibular function is hard for me. Please help! Hello everyone, [PLAIN]http://thalamus.wustl.edu/course/aud9.gif First of all I don't understand the pic. Why is the endolymph moving in opposite direction to the movement of head, shouldn't it move the same way. How is inertia involved in...
  2. N

    Why has it been so hard to cominbe Gravitational Forces with

    Why has it been so hard to combine gravitational forces with that of electrical forces? I'm curious. What are the major underlying problems?
  3. A

    Atom composition (simple question but hard for me)

    Homework Statement Fe3(Co)x, Fe is 33.26% by mass. Find the value of x. The Attempt at a Solution 167.5425 g / 0.3326 = x ( 58.9326 g) / 0.6628 x = 5.6... but the right answer given was x=12. question...
  4. mugaliens

    Have you seen the hilarious show '99' on IMDb?

    Just sharing. Oh, http://www.imdb.com/title/tt0425061/" . My goodness! Watch it with your folks.
  5. K

    Any advice on taking Calculus III when Calculus II was hard?

    I barely passed Calculus II, I got 50 in the whole course after finals and I had 56 before finals. The class avg was around a high D but I can't remember exactly now but that's besides the point. Calculus II at my college was integral calculus with some application of integrals(volume, surface...
  6. R

    Hard Physics Problem - Centripetal Force

    Homework Statement A popular amusement ride operates as follows: Riders enter the cylindrical structure when its stationary with the floor. They then stand against the wall as the cylinder then begins to rotate. When it is up to speed, the floor is lowered, leaving the riders suspended against...
  7. F

    This makes no sense, is my textbook dumb or I am trying too hard?

    Homework Statement Consider this matrix as the augmented matrix of a linear system. State in words the next two elementary row operations that should be performed in the process of solving the system \begin{bmatrix} 1 & -4 & 5 & 0 & 7 \\ 0 & 1 & -3 & 0 & 6 \\ 0 & 0 & 1 & 0 & 2 \\...
  8. B

    What level of math is needed to truly understand 20th century physics?

    I'm a reasonably smart person. I have knowledge of 11 languages and I'm a proud studyaholic, meaning I've been studying voluntarily for about 30 hours a week since 2007, and 50 hours a week for the last 4 months. I'm tired of reading popular science physics books which report what scientists...
  9. E

    Hard time starting analysis, want to start fast

    Back in the end of october, I picked up math as a hobby (although it will also help me career-wise, but in the end I probably won't go into a math related career, unfortunately. Currently my major has nothing to do with math). I had only completed up to calc II for the AP test, and hadn't done...
  10. Useful nucleus

    How hard is it to be an engineer and pure mathematician?

    I was wondering whether it is possible for an engineer with a PhD to learn pure mathematcis in depth to a level that enables him/her to use some ideas or line of thinking from pure mathematics into engineering and vice versa (if the vice versa is actually possible). Or is it completely...
  11. C

    What is a Hard Science and Which Undergraduate Degrees Fall Under This Category?

    Definition of a "Hard Science" I was reading through some master's program admissions guides and came across this statement twice under the requirements: "An undergraduate degree in engineering, math or hard science from a regionally-accredited university". The first two parts are...
  12. M

    Divergence and surfaces integral, very hard

    Homework Statement A vector field h is described in cylindrical polar coordinates by ( h equation attached ) where i, j, and k are the unit vectors along the Cartesian axes and (er) is the unit vector (x/r) i+(y/r) j Calculate (1) by surface integral h through the closed surface...
  13. I

    What is the Solution to the Equation 2x = x^2?

    Homework Statement solve 2x = x2 Homework Equations The Attempt at a Solution i have no clue
  14. A

    Solve Hard Sequence Problem: Find √1+√1+2√1+3√1+...

    Find \sqrt{1+\sqrt{1+2\sqrt{1+3\sqrt{1+...}}}}
  15. D

    Physics is too hard for physicists

    "Physics is too hard for physicists" What does this quote from Hilbert mean? My Math professor said he can't stand how vectors are used in Physics. Being a first year student, I have no clue what this means yet. All of my friends at school are Math majors and have a certain distaste for...
  16. I

    Where Should Charge C Be Placed to Achieve Zero Net Force?

    Homework Statement There are two questions, one being a communicational question while the other an application: 1.Charge A of +2.0 muC is put at the origin of an cartisian plane. Charge B of -4.0 muC is put 40 cm to the right of charge A. Where should charge C be placed (between the two...
  17. G

    Hard time with school, need guidence.

    I am just finishing up my sophomore year in a Junior College and am getting ready to transfer to a UC. The last few math courses have been very difficult for me. I am usually an A student but am starting to lose motivation because of the difficulty. My Physics courses are very easy, but I am...
  18. K

    How Does a Leaking Tank-Wagon Move and What Is Its Final Velocity?

    This problem sounds like a homework problem but its not and it is really hard. Consider a rail tank wagon filled with liquid, say water. Suppose that at some moment t=0 there opens a nozzle at left side of the tank at the bottom. The water jet from the nozzle is directed vertikally down...
  19. Q

    A REDICULOUSLY hard questions about building a temperature model

    Please help. I need this answered by tomorrow morning. The question is: Compute the average temperature over the Earth's surface given the fact that the Earth is a sphere with radius a=p. The temperature model is given by the linear transformation T=2(deg)+85sin(φ), with a 90deg rotation...
  20. J

    I'm having a hard time visualising how the units of torque are

    I'm having a hard time visualising how the units of torque are measured. I can picture how quick m/s or RPM is. But when it comes to torque, I cannot picture what 'x' amount of N/m does. Example, for a motor with 3.3 Lb-Inch or 7N/cm. Does it move 3.3lb of weight per inch? Does that mean...
  21. P

    How hard is string theory exactly?

    I often hear people talk about string theory being the hardest branch of theoretical physics, and require a PhD to even understand the basics. I've even heard of people saying it's getting too hard for humans, much like quantum mechanics is too hard for cats. So to put things into perspective...
  22. T

    Having a hard time grasping the concept with momentum

    So I'm struggling trying to grasp the concept of momentum..due to my physics teacher going WAAAAAAAY too fast && i asked for help he didn't help much at all :\..so i asked my previous physics teacher i had before transferring classes because the school " said so " but it was a bit still...
  23. L

    Hard Drive Troubles: Is It Time to Worry?

    I turned on my computer this morning and it said my computer couldn't start and it began a startup repair thing. The startup repair thing didn't find any problems and it shut down my computer. I turned my computer back on and it started up normally. Is this an indication my hard drive is...
  24. B

    Solving Hard Quantum Q Homework - Get Tips & Solutions

    Homework Statement see attached :) Homework Equations The Attempt at a Solution Not sure how to start..! Any hints? Thanks!
  25. A

    Word problem Derivative of Distance formula Super hard. Please help.

    Word problem Derivative of Distance formula... Super hard. Please help. Homework Statement A point P is moving along the cruve whose equation is y=√x. Suppose that x is increasing at the rate of 40 units/s when x=3. How fast is the distance between p and the point (2,0) changing\ at that...
  26. K

    2 hard angular momentum problems

    Homework Statement the easier one Atwood's Machine. The masses are M and 2M, and the pulley is a uniform disk of mass M and radius R. the string is massless and does not slip with respect to the pulley. Find the acceleration of the masses. Use force and Torque. answer should be something...
  27. S

    Fake hard aggrevation, and an appeal for advice.

    "Fake hard" aggrevation, and an appeal for advice. I love math. And logic. And modeling things. Outside of class, I even love physics. Inside of class, I feel like someone playing Street Fighter for the first time against someone who has owned the game for a year. Every time I get a...
  28. P

    How hard is it to be accepted for the Cambridge part 3 math tripos?

    Once i finish my undergrad in Australia, how hard would it be to take the masters course at cambridge, the mathematics part 3 tripos? Furthermore, how hard would it be to graduate with distinction? This is of course assuming i am good enough at math and physics to graduate first at my...
  29. J

    Is the Original Figure Considered a Shape in This Puzzle?

    Draw a picture showing four identical shapes where each shape has at least one border with the other three. Your picture should be a single two-dimensional shape containing no gaps or holes. Tried many shape combinations irregular and regular. We got given a hint of not to think or draw...
  30. I

    What is Energy? - Unpacking Hard Definitions

    What is Energy? - Hard energy definitions Explain this definition: energy is the ability to impart vis viva (mv2) Is it a well definition? Here's a more complex definition: energy is that measure of the physical change of a system that is conserved as a result of temporal displacement...
  31. H

    Detail for Hard Water and Soft Help

    pls give me the detail notes for what is Hard water and softwater, Method to remove of Hardness,,,,,,,Hlep me
  32. C

    Calculus - Hard Volume Problem :\

    Homework Statement A pool in the shape of a rectangle is ten (10) m wide and twenty five (25) m long. The depth of the pool water x meters from the shallow part/end of the pool is 1 + (x^2)/175 meters. Write a definite integral that yields the volume of water in the rectangular pool...
  33. N

    Courses How hard are grad. courses and what to expect?

    I am planning to take my first grad course next semester in statistics (analysis of variance) and am debating if I should take grad combinatorial optimization as well. I handled 4 upper div. courses this semester pretty well (ODE, real analysis, probability theory, advanced linear algebra) but...
  34. B

    Solving Hard Viscosity Q Homework: Find Couple on Disk

    Homework Statement Two plane disks, each of radius 5cm, are mounted coaxially with their adjacent surfaces 1mm apart. They are in a chamber containing gas at STP (viscostiy of gas = 2.1 x 10^-5 Ns/m^2) and are free to rotate about the common acis. One of them rotates with angular velocity of...
  35. C

    Please help. Very hard probability question with unusual wording

    Homework Statement Suppose that each day I either catch the bus to work or drive my car to work. Suppose that the probability I catch the bus on any particular day only depends on the mode of transport I used on the previous day, and is 0.7 if I caught the bus on the previous day and 0.25...
  36. S

    Hard logarithmic/implicit differentiation question.

    QUESTION HAS BEEN SOLVED ! :) THANKS MARK! Homework Statement Shark Inc. has determined that demand for its newest netbook model is given by https://webwork.elearning.ubc.ca/webwork2_files/tmp/equations/80/fa9842dd3479ee1baaab655e02a1c41.png, where q is the number of netbooks Shark can sell...
  37. S

    Hard centripital force problem

    Homework Statement A person drives a car (without negative lift) over the top of a hill, the corss section of which can be approximated by a circle of radius 250m. What is the greatest speed at which he can drive without the car leaving the road at the top of the hill? Homework Equations...
  38. D

    How can the density, area, and velocity be related in a cyclic fluid flow?

    [PLAIN]http://img811.imageshack.us/img811/4882/stumped.png So from the above question I presume that the relation (Density)x(Area1)x(Velocity1)=(Density)x(Area2)x(Velocity2), cannot be applied due to the flow being unsteady and thus the control volume changing with time. I've read up about...
  39. I

    Mastering Hard Thinking Questions: Solving for a, p, and q with Given Equations

    Homework Statement a) given, a + 5 and 2a-1, one is 40% greater than the other one, solve for a. b) given, 5x^{4} + 4x^{3} + 3x^{2} + Px + Q. When divided by x^{2} - 1, you get a remainder of 0, solve for p and q. c) given csc(6b + \frac{pi}{8}) = sec(2b - \frac{pi}{8}), solve for b...
  40. O

    How Does Green's Identity Prove Solutions in Poisson's Equation?

    I think this is Poisson's Equation (and inhomogenous). I think I need to use Green's Identity. Let \mathcal{R} be a bounded region in \mathbb{R}^3, and suppose p(x) > 0 on \mathcal{R}. (i) If u is a solution of \bigtriangledown^2 u = p(x) u \ \ x \in \mathcal{R} \ \...
  41. O

    4 very hard thermodynamics problems

    1. Suppose a piece of solid bismuth weighing 27.7 g at a temperature of 253 °C is placed in 277 g of liquid bismuth at a temperature of 333 °C. Calculate the temperature after thermal equilibrium is reached, assuming no heat loss to the surroundings. The enthalpy of fusion of solid bismuth is...
  42. P

    Mastering the Hard Integration Problem: A Comprehensive Guide

    integrate zdz/sqrt{z^3-1} I have been doing it for 1week. please help me
  43. S

    Why Does DNA Replication Require a Lagging Strand?

    1 hard(?!) Biology Question!HELP! :/ Homework Statement If life had been "intelligently" design, and if an important design principle is conservation of material and efficiency of process, we would not expect DNA replication to involve the crazy, complex, intricate, Byzantine mechanism for...
  44. kandelabr

    Sealing with two hard, flat surfaces

    Imagine the following scenario: There is a hollow steel cube. I cut the top facet off so that I get a box with a lid and then polish both cut surfaces so that geometry fits almost perfectly (no gaps are larger than 1/100 of a milimeter or so - or even smaller). Then I close the box and...
  45. T

    Calculating Heat of Reaction in Thermochemistry Problems

    I am a high school senior having a problem with a problem in my thermochem class. Could someone please help me understand the following: if 16.8 kJ are released when 1.20 g of F sub 2 (F2) reacts with SiHsub4 (SiH4), what is the heat of reaction when 1.90 moles of Fsub2 react?
  46. P

    What I consider to be a very hard spring-potential energy problem

    Homework Statement A horizontal slingshot consists of two light, identical springs (with spring constants of 57 N/m) and a light cup that holds a 1-kg stone. Each spring has an equilibrium length l0 = 47 cm. When the springs are in equilibrium, they line up vertically. Suppose that the cup...
  47. M

    How Can We Mathematically Justify the Limit in a Hard Limit Problem?

    [PLAIN]http://img839.imageshack.us/img839/2670/hardlimitproblem.jpg I am having trouble showing this. I figured I would divide both sides by a, and show that lim n-> infinity [(a1/a)*b1+...+(an-1/a)*bn-1+(an/a)*bn]/(b1+...+bn) = 1. I can explain in words why I believe this to be true; as n...
  48. N

    Why is Physics So Hard? Advice to Improve

    I am not sure where to post this thread but i guess here. So not to brag but I have gotten straight A's most of my entire life, I found school pretty easy aside from some spots (like Spanish). My GPA is very high and I am ranked in the top 2 percent of my class. So once I completed spanish 3 i...
  49. S

    Probability question, Very hard

    12 persons sit around a round table for a game. 1st person gives the ball in his hands to the person in either his left or right randomly. in the same token the person who holds the ball gives it the person in either his left or right randomly. game continues so until the last person holds...
Back
Top