Rock music is a broad genre of popular music that originated as "rock and roll" in the United States in the late 1940s and early 1950s, developing into a range of different styles in the mid-1960s and later, particularly in the United States and the United Kingdom. It has its roots in 1940s and 1950s rock and roll, a style that drew directly from the blues and rhythm and blues genres of African-American music and from country music. Rock music also drew strongly from a number of other genres such as electric blues and folk, and incorporated influences from jazz, classical, and other musical styles. For instrumentation, rock has centered on the electric guitar, usually as part of a rock group with electric bass, drums, and one or more singers. Usually, rock is song-based music with a 44 time signature using a verse–chorus form, but the genre has become extremely diverse. Like pop music, lyrics often stress romantic love but also address a wide variety of other themes that are frequently social or political.
Rock musicians in the mid-1960s began to advance the album ahead of the single as the dominant form of recorded music expression and consumption, with the Beatles at the forefront of this development. Their contributions lent the genre a cultural legitimacy in the mainstream and initiated a rock-informed album era in the music industry for the next several decades. By the late 1960s "classic rock" period, a number of distinct rock music subgenres had emerged, including hybrids like blues rock, folk rock, country rock, southern rock, raga rock, and jazz rock, many of which contributed to the development of psychedelic rock, which was influenced by the countercultural psychedelic and hippie scene. New genres that emerged included progressive rock, which extended the artistic elements, glam rock, which highlighted showmanship and visual style, and the diverse and enduring subgenre of heavy metal, which emphasized volume, power, and speed. In the second half of the 1970s, punk rock reacted by producing stripped-down, energetic social and political critiques. Punk was an influence in the 1980s on new wave, post-punk and eventually alternative rock.
From the 1990s, alternative rock began to dominate rock music and break into the mainstream in the form of grunge, Britpop, and indie rock. Further fusion subgenres have since emerged, including pop punk, electronic rock, rap rock, and rap metal, as well as conscious attempts to revisit rock's history, including the garage rock/post-punk and techno-pop revivals in the early 2000s. The late 2000s and 2010s saw a slow decline in rock music's mainstream popularity and cultural relevancy, with hip hop surpassing it as the most popular genre in the United States.
Rock music has also embodied and served as the vehicle for cultural and social movements, leading to major subcultures including mods and rockers in the United Kingdom and the hippie counterculture that spread out from San Francisco in the US in the 1960s. Similarly, 1970s punk culture spawned the goth, punk, and emo subcultures. Inheriting the folk tradition of the protest song, rock music has been associated with political activism as well as changes in social attitudes to race, sex, and drug use, and is often seen as an expression of youth revolt against adult consumerism and conformity. At the same time, it has been commercially highly successful, leading to charges of selling out.
To be underrated you have to
1) be really good
2) have had lots of exposure, playing on hit records and touring and such
3) nevertheless go unnoticed
I've been making a fancy video with Blue Oyster Cult's Don't Fear The Reaper. Hearing it many times I gradually focused on drummer Albert...
He founded the band with Gregg and Duane Allman in 1969.
One of my favorite tunes of theirs is the wonderful Blue Sky which he wrote for his girl friend at the time.
(i) A bulk density test gave an approximate value of 4.5kg/m3.
(ii) The rock is ferromagnetic. It measures 16cm x 14cm at widest points and weighs 4.5kg. The bulk density would appear to rule out either slag.
(iii) It would appear to have a fusion crack which stretches across one face and...
You already know about Crossroads and Red House, so skip those.
Etsushi Ogawa [ 小川悦司 ] I like the way this builds so gradually. You also get to see Senri Kawaguchi wearing a Peter Pan collar.
John McLaughlin -- Tokyo City Girl
I dunno that anyone else will like this but it's my fave...
For this problem,
The answer is ##6.28 m/s##, however, I got ##-314 m/s## and I am not sure what I have done wrong.
My working is,
##H'(t) = \lim_{t \rightarrow 1} \frac{H(t) - H(1)}{t - 1}##
##H'(t) = \lim_{t \rightarrow 1} \frac{-1.86t^2 + 10t -8.14}{t - 1}##
##H'(t) = \lim_{t \rightarrow 1}...
a) I can find the compressive strain on the aluminium column using the formula ##\sigma = E\epsilon## as we know ##\sigma = F/A##. The area of the column is ##A = \pi r^2 = 0.126m^2## and the force on the column is ##F = 300*(9.8)N = 2940N##. The stress therefore is ##\sigma =...
I understand how to measure specific gravity of a rock. One weighs the rock then tares a beaker of water and then suspends the rock on a string to observe the “weight” gain of displaced water. My brain however could never get how, without adding a drop more water or adding the mass of the rock...
For part(a) and (b),
The solution is,
Can someone please explain the solutions to (a) and (b) to me? I don't understand where they got 5.77 cm from.
Many thanks!
Jeff Beck, the British guitar virtuoso who rose to prominence in the 1960s as a member of the Yardbirds and later embarked on an acclaimed and prolific solo career, died Jan. 10. He was 78.
https://www.msn.com/en-us/entertainment/news/jeff-beck-virtuoso-rock-guitarist-dies-at-78/ar-AA16eqam...
I tried to write a trajectory equation of motion.$$x(t)=vcos\alpha t$$
$$y(t)=vsin\alpha t-\frac{1}{2}gt^{2}$$from these we get:$$y=xtan\alpha -\frac{x^{2}g(1+tan^{2}\alpha )}{2v^{2}}$$For this problem:$$h=xtan\alpha -\frac{x^{2}g(1+tan^{2}\alpha )}{2v^{2}}$$ $$2h=(x+r)tan\alpha...
Hi everyone
I have solutions to this problem, but I am not sure if the premise behind them is correct.
I think this is the reasoning behind the solution for question d.
- Work out how far the elevator travels in the 7s before the rock is thrown, so 7x2.5 = 17.5
- Work out how far the...
Hello! My friend found a rock on a beach near Ancona, in central Italy, and now he's convinced it's a meteorite. I have some doubts, however: it looks too cracky and porous. I'm attaching a few pictures of the rock: could someone give me an opinion?
Thank you very much for the kind attention...
Hi. I'm an amateur mason - I currently use drills and plugs to split granite boulders. I've used sledge hammers, chisels and levers. I've dropped rocks, used hydraulic presses and tended fires to crumble and split rock. It's hard work. It's long hour work.
I'm wondering if there's not a better...
I found a round smooth like rock with orange and black stripes and it's magnetic
Reference: https://www.physicsforums.com/forums/earth-sciences.84/post-thread...i don't know how to post picture
<Moderator's note: Thread split off. You guys take your fight outside (the jokes thread) :wink:>
A body language analysis gives an interesting breakdown of this.
Not a moral judgement, just whether it was staged or not in his opinion.
Hey Everyone,
I am working on making a simulation of a rock climber on a wall in 3D space. The end result is to help visualize the free body diagram of the climber and show how moving your limbs moves your center of mass and changes the forces on your hands and feet.
I've been struggling to...
A small fragment of rock found lying in a field in Gloucestershire in the UK may not have looked like much to the casual passerby ...
I'm curious how this was found, if not by a "casual passerby". Did there happen to be a meteorite expert wandering in the Gloucestershire field?
I have often been surprised to find music videos from the late 60s and early 70s, of people and groups like David Bowie, and The Guess Who. This surprises me because the first music videos I remember came along with MTV in the 80s. And I have often heard it discussed that MTV rushed in a new era...
https://phys.org/news/2020-10-carbon-creation-astrophysics.html
Back in 2016 - Recent results in nuclear astrophysics
https://arxiv.org/abs/1605.07810
From the abstract -
https://www.asi.edu.au/wp-content/uploads/2016/10/Physics_ASOE2015solutions.pdf
Q`12b)
Unable to understand how they deduct the relation between Ffall and N via the angles.
Unable to tell why this would act along the axle of the cam to the point of contact with the rod and be relatable to each...
I know the acceleration of the rock is equal to g, but why. If we neglect air resistance, what is actually making the rock fall? Wouldn't it be that g overcomes the acceleration of the y plane at some point so the rock starts coming down or in this case accelerate more by throwing below 0 degrees?
I just love space rocks :biggrin:
The latest addition to my meteorite collection
NAME (LOCALITY): Huckitta, Huckitta cattle station, NT, Australia
FALL DATE: Unknown, found 1924 (TKW 2300kg)
CLASS: Pallasite, PMG-an
WEIGHT g: 220.1g
METEORITICAL BULLETIN: Never published in the...
The age of the oldest rocks on Earth & Moon are about 4.5 Gy old. But doesn't the material that made the Earth come from the supernova that had occurred prior to the formation of the Solar System, and doesn't the radioactivity dating measure the age of the creation of that material in that...
Hello,
Could I please get assistance with a rock identification. I came across this one in the southwest part of the U.S. While I see a lot of slag from old mines, this rock appears to be something different than slag. Besides, it was the only dark colored rock I came across that day. It also...
Hello,
Thanks for providing a forum where people can share their education/passion and help others. Speaking of helping out, could I please get some feedback on this rock I came across in the southwestern part of the U.S.? I picked it up because it didn't match anything else in the area. It sat...
Firstly I apologise for the most basic of questions...
I want to know the odds for the game Paper Rock Scissors.
What are the odds of winning
What are the odds of drawing
Thanks in advance :)
I fly in a spaceship on a 2d plane (for simplicity sake) in zero G. I eject a rock 90 degrees right to my forward vector. What does the equation look like if I want the final vector of the rock?
I know the final speed of the rock is 100.
What variables need to be known about the ship and rock?
Homework Statement :[/B]
One swings a rock at the end of a string. We wish for the string to remain taut and for the rock to travel in a circulat path, in a vertical plane. What mathematical condition must the centripetal acceleration of the rock satisfy for the string to remain taut when the...
Homework Statement
a rock is dropped off a cliff and falls the first half of the distance to the ground in 2.0 seconds.
Homework Equations
How long will it take to fall the second half?
The Attempt at a Solution
i thought if i took the square root of two and then subtracted that from 1/2t...
Homework Statement
A catapult launches a rock with an initial velocity of 50m/s at 35 degrees above the horizontal. The rock must clear 3.5m at 10m away in order to make it over a castle wall to get to the enemy. Do the knights succeed? By how much do they clear the wall or miss clearing the...
i designed a cone drill bit with right hand thread to give friction and grab inside to give pulling force. my question is can this type of cone drill bit drill hard rock formations like normal tricone drill bits with teeth or the cone drill bit will be weak to penetrate hard rock formations .
Homework Statement
Homework Equations
U = (1/2)kx^2
T = 2 * π * (m/k)^ (1/2)
The Attempt at a Solution
[/B]
T = 2 * π * (m/k)^ (1/2)
T ^ 2 = 4 * π^2 * (m/k)
k = (4 * π^2 * m) / T^2
So I know the initial potential energy is:
U = (1/2)kx^2
U = (1/2)x^2 * ((4 * π^2 * m) / T^2)
However, I...
Hi, so I have a problem that I am working on and I think that I understand Archimedes principle but the density that I am calculating is just absurd. The problem is as follows:
"A geologist finds that a moon rock whose mass is 9.28 kg has an apparent mass of 6.18 kg when submerged in water...
A bird is located at the (50, 8 ) m coordinate. A boy shot a rock at it using a slingshot with the elevation angle 37^{\circ}. How much velocity is needed for the rock to be able to hit that bird?
I substituted all known variables (including the gravity acceleration 10m/s^2, with...
Homework Statement
A truck is moving at constant velocity. A rock is dropped from a storage compartment located at the midpoint of the ceiling of the truck. Where does the rock land on the floor.
2. Homework Equations
Ax=0
The Attempt at a Solution
[/B]
The given answer states that the...
I was thinking about this question:
So if a rock fell 20,000 meters to Earth assuming no air resistance and no other gravitational forces from anything but Earth, how long would it take the rock to hit Earth? Keep in mind acceleration is changing through the gravity equation as the rock gets...