A catapult is tested by Roman legionnaires. They tabulate the results in a papyrus and 2000 years later, the archaeological team reads (distances translated into modern units): range= 0.20km, angle of launch = π/4. What is the initial velocity of launch of the boulders?

An old-fashioned single-player vinyl record on a turntable at 45 rpm? What are (a) the angular velocity in rad/s and (b) the period of the motion?

A rescue plane sports a survivor 182m directly below and releases an emergency kit with a parachute. If the package descends at a constant vertical acceleration of 5.82 m/s2 and the initial plane horizontal speed was 72.6 m/s. How far away from the survivor will it hit the waves?

The problem states that a record player rotates at 45 rpm and I would need to find the angular speed of it in rad/s. What would be the formula be for this? Any help and clarification would be greatly appreciated, I am studying for my final and I can not seem to find the formula/steps to this. *I am in Pre-Calculus too*. Thank you!

1) If your doctor gave you three pills and said to take one every half hour, how long untill you have taken all the pills?
2) A house is built so that each side has a southern exposure. If a bear were to wander by the house, most likely the color of the bear would be?
3) How far can a dog run into a forrest?
4) What is the minimum number of active baseball players on the fieal during any part of an inning?
5) How many outs in an inning
6) If it takes Anne 2 hours to dig a hole and it takes Dave 3.5 hours to dig a hole how long would it take both Anne and Dave to dig 1/2 of a hole?
7) How many three cent stamps are in a dozen?
How long will an 'Eight Day Clock' run without winding?
9) What is the third hand on a clock called?
10) Does the Roman Catholic church allow a man to marry his widow's sister?
11) How many grooves are there on each side of a 45 rpm record if side A is 2.5 minutes and side B is 4.5 minutes?
12) In an ordinary deck of cards the king of diamonds has onr eye, all the rest have two eyes. How many eyes are on the four king cards?
13) From what animal do we get catgut?
14) Two babies were born on the same day, same month, same year, to the same mother but they are not twins. How is that possible?
-Any answers are great, THANKS.

My mother wants to rip her old vinyls (33 1/3, 45, and 78 RPM) into MP3s that she can play on an MP3 Player. Can anyone recommend a good USB Turntable that I can get her for Christmas? She has a laptop so recording them through a sound card isn't an option.

If I turn on a turntable (record player) so that it is at a standard USA playing speed at 1:05 am on any given day (in Pennsylvania), and stop it from spinning at precisely 1:05 am on the next day (in Pennsylvania), how many revolutions (total spins) did the record player complete?

The turntable sustains a consistent speed (rpm) the entire time.

Do you know the answer(s)?
If there is more than one answer, how many answers are there?

For the younger folks, I only know of three standard rpm for USA records ( 33 1/3, 45, and 78). If you can give examples of other speeds, I will take it in consideration for best answer.
If there is more than one answer, how many answers are there?

The total number of possible answers are sufficient to get the best answer, but please explain your reasoning.
* I was not taking the revolution of the earth into account. The question is strictly about time and number of revolutions of the turntable platter.

rpm = revolutions per minute. So, you would multiply (33 1/3 or 45 or 78) by the number minutes in the time between 1:05 am on any given day. It is easy to find three answers that are correct, but there are other possible answers to the question.

Hello i am looking to purchase my fiancé a record player for Christmas to play vinyl records on.
I have purchased a few records to go with player, and i am now looking to purchase the player itself.
However i am slightly confused. I purchased the below record.

http://www.amazon.co.uk/Back-Black-VINYL-Amy-Winehouse/dp/B000P5FG1I/ref=sr_1_1?ie=UTF8&qid=1291806509&sr=8-1

I was looking to purchase the below player

http://www.argos.co.uk/static/Product/partNumber/5139316/Trail/searchtext>TURNTABEL.htm

I was wondering if the record would play ok. It states 33 and 45 rpm speed turntable, what does this mean? There have been some i have seen that have stated 78 rpm to. What is the difference? Would the above record i purchased work ok on this player.

Sorry if i sound dumb. The oldies dont know much about modern tech, i not know much about old tech lol.

Many thanks

I recently decided to collect vinyl records as a hobby. I don't have a record player yet but eventually I will get my hands on one. Does one (record player) work for all the different size and speed of vinyls? (Ex: 7'',10'',12'' and 33 RPM, 45 RPM) Also, can anyone recommend a good record player that can be bought on Ebay or more ideally in stores?

Im clueless in these matters so every bit of information will be appreciated greatly! Thank you

a coin falls onto an old fashioned record player, rotating at 45 rpm. the coin lands 6 cm from center. assuming the motion of the record is unaffected by the coins prescence, find a)the coins angular speed in rad/sec and b)its tangential speed in m/s

I just got one today and no matter how many times I press Open it does not open ( except twice )
I set it to CD mode, its plugged in, it's on, it's all set.
But it only opens when it wants to open which is rare and annoying too.
the Record player on top plays well but there is something fishy about it, i think 331/2 rpm is a bit too fast.. maybe playing at 36rpm. ( not 45).

Any idea's why the CD player wont open or anyway to fix it? or do i have to cart it back to the store.

Those of us old enough to remember the days before cassette tapes and CD's will know what this is referring to right away. FOr the younger folks, back in the days when it was mainly records most record players had 4 speeds - 16, 33, 45 and 78 - based on the rpm's of the turntable. By the time I was around they only made records in 33 - mainly for albums and 45 - usually for singles. To get to the point, when you were bored it was a great source of entertainment to see what your albums sounded like at the wrong speed - often quite funny, too. With all the advantages CD's and such have, it is not possible to do this with them. Anyway, with the advent of mp3's / computer music there has to be a way for the non-expert to do this again. So, the question is, does anyone know a place you can download something that will do this or a feature on itunes/ windows music I haven't been able to find?
Audacity doesn't work. Tried it and it just plays like a 1 second squeak instead of playing the song.

I recently scored a great deal on a full stereo set, it included a 5 cd changed, a dual cassette player (with high speed dubbing), AM/FM tuner, the amplified for it all, and of course, to put the cherry on the top; a very nice Sony Turn table with 2 speeds; the common 33 1/3 and then the other common, 45. Sadly, I ran a test (after noticing bad sound quality) on it and realized it spun at approximately 29 /12 RPM, causing bad distortion in the record. I checked the motor and belt and neither of them looked damage - not that I know for sure since I am not completely familiar with Record Players.
I just assumed the Motor was not functioning right, and I was told getting my turn table fixed would cost as much as buying a new one, so, I have been on the search for a somewhat cheap turntable.
It needs to have RCA cables to connect into my amplifier, and needs to be thin to be able to fit in stereo case that all the equipment came in. (not like laptop-thin, but you know, nothing humongous). Aside from that, I only use 12" vinyls, and don't plan on owning and 45s, so so long as it can play 12" vinyls - at the correct speed - I am fine with that.

My boyfriend bought me a turntable so i can play my records. I'm sort of a n00b at this..but what does size selection mean? I tried on both 17 and 30 but didn't notice any difference. This doesn't have anything to do with the 33.5 and 45 RPM does it? Thanks in advance.
Ohh. that makes sense. I always knew that 33.5rpm's are 12 inches and 45's are 7 inches, but it didnt occur to me the sizes are in cm...12 in = 30 cm, and 7in=17cm. Thanks a bunch!

What was the first 45 rpm record you ever bought?
Remember playing your 45's on one of those little portable suitcase type record players and you lost the thingy to hold your record in place and you would try to place it just right to play without it sounding all distorted?
Oh, and let's not forget putting on your 45's and setting the speed on 78rpm so you could laugh at your favorite artists sounding like the chipmunks
I always lose my thingys
WOW. SO MANY GREAT ANSWERS I DON'T KNOW WHO TO CHOSE.
I noticed some answers got thumbs down.
What's with that? How can you thumbs down somebody's fond memories of things that made them happy?

This is a bit embarrassing, please bear with me because I know nothing about this stuff. I want to buy an old vintage record player and a bunch of records, but I'm looking on ebay and it states whether the records are 33 or 45 or 78 RPM. I have no idea what this means, and how do I know which are compatible with a record player? Are they all compatible? Is one of the RPM better than another? Please help me out, thanks!!

The following are practice problems to prepare for a physics exam. Any help would be most appreciated.

2. The rate of rotation for popular music records on a record player was 45 RPM.
a. Express this rotational velocity in rev/s. I
b. Through how many revolutions does the record turn in a time of 5 s? The record turns 3.75 revolutions in 5 seconds.
5*.75=3.75
6. The rotational velocity of a spinning disk decreases from 6 rev/s to 3 rev/s in a time of 12 s. What is the rotational acceleration of the disk?
8. A force of 50 N is applied at the end of a wrench handle that is 24 cm long. The force is applied in a direction perpendicular to the handle as in the diagram.
a. What is the torque applied to the nut by the wrench?
b. What would the torque be if the force were applied half way up the handle instead of at the end?
12. A net torque of 60 N*m is applied to a disk with a rotational inertia of 12.0 kg*m2. What is the rotational acceleration of the disk?

I'm looking into buying a record player. The one I'm looking at has 33 1/3 and 45 RPM.
It doesn't have 78 RPM, would this be needed?
I have looked at my vinyl and most say 33 1/3 or 45, however some don't mention their RPM.

Thanks.

a 33 1/3 rpm record on a turn table uniformly reaches its operating speed in 2.45 sec once the record player is turned on.

A)what is the angular distance traveled during this time

B)what is the corresponding arc length in ft. in the circumference of a 12-inch diameter record?

i need to know how to do this for a test tomorrow, would appreciate ur help very ,much so i don't fail

Bobby socks, black suede penny loafers or Ivy League black & white oxfords? Sock hops, duck tail haircuts or ponytails, starched collars worn up to look cool, tiny little plastic colored clothespin worn on the collars? And Rock & roll music on a 45 RPM record played on a small record player? (sigh, the good times todays teens missed out on.) What memory stands out in your mind?
Ivy League oxford had the buckle on the back of the heel. If you wore the buckle open it meant you weren't going steady with anyone.

thanks just making sure.
its a crosley
it says i have an option of 33, 45, and 78 rpm.
will the big records still play and fit on my player? will i just have to put it on 45rpm and it will work?

i got this great 3-speed record player it can play 33-45-78 rpm and i was wondering where some one could find cheap records

when the author was a teenager, the rate of rotation for popular music records on a record player was 45 RPM

a) express the rotational velocity in rev/s
b) through how many revolutions doesw the record turn in a time of 5s?

please explain in an easily understandable way

big hub hole for 45-RPM discs (even though small-shaft players can be adapted for those)?

Will you come back and see my responses to yours, please?

Thanks,
Mike Christensen
Whow, thanks, Kim! That's quite an article! It seems odd and shallow and selfishly lame that a company would change the hole size just to lock consumers in, but that article sounds like it's speaking the truth. That speed optimization info. sounds pretty interesting.

But then other manufacturers defeated that lock-in effect by making hole-size adapters. Hmm, imagine that!

Thanks!
Mike

in the 1940`s record players were made to spin at 78 revolution per minute (rpm). a more modern record player spins a record at a rate of 45 rpm.if both turn table spin for 9 minutes find the difference in the number if turns they make.ORGANZIE YOUR INFORMATION AND EXPLAIN HOW STEP BY STEP

Hi. I recently was given a second hand record player by a friend. I am ashamed to say that although i have listened to loads of vinyl records when i was a kid (my dad lost all his records and player during a move) i do not know anything about actually playing a record! i am 19 now. I have always loved the sound compared to cds and now i want to build up a vinyl collection from scratch. I still have one 7 inch record and another 12 inch one.My player Semi-automated turntable and has two speed knobes - 33and 45.and as far as i can see there is no needle on the edge of that handle thingy. its just a square like thing. Can someone explain what all this means very simply. I have spent hours online trying to read up on this but i have gotten even more confused with all the terms. what is EP and LP? what is 78 rpm, 45 rpm, 33⅓ rpm? what records should i buy? what player plays what kind of record? i can't ask my parents cause they are not around.Please please help me out. sorry if i sound stupid but this is a part of my childhood that i want back. thanks alot
My player is a semi-automated turntable Sherwood PD-701B
http://www.trademe.co.nz/Electronics-photography/Home-audio/Vintage/auction-225543631.htm
as for my budget..i don't really have one yet. as in I have to save to get what i want so preferably something reasonable and mid-priced.i cant tell you an exat price because i have no idea how much these things cause.as for music - I absolutely love the beatles, bob dylan and aerosmith.and some motown stuff- like smokey robinson. thanks alot for the help.

This is a bit embarrassing, please bear with me because I know nothing about this stuff. I want to buy an old vintage record player and a bunch of records, but I'm looking on ebay and it states whether the records are 33 or 45 or 78 RPM. I have no idea what this means, and how do I know which are compatible with a record player? Are they all compatible? Is one of the RPM better than another? Please help me out, thanks!!