 when bodies interact, the total momentum in any specified direction remains the same.
A collision in which kinetic energy is conserved (momentum and total energy always conserved).
A collision in which kinetic energy is not conserved (momentum and total energy are conserved).
The angle subtended at the centre of a circle when the arc length is equal to the radius. Pi radians equals 180 degrees.
The gravitational force per unit mass.
Any two point masses attract each other with a force that is directly proportional to the product of their masses and inversely proportional to the square of their separation.
The time taken by an object to complete one orbit or for one complete oscillation by a vibrating object.
The orbit of a satellite which has a period of one day and is in the equatorial plane.
Motion of an oscillator where acceleration is directly proportional to the displacement and is directed towards the equilibrium position.
Distance from the equilibrium position, can be positive or negative.
Magnitude of the maximum displacement from the equilibrium position.
The number of oscillations per unit time.
The rate of change of an angle expressed in radians per second.
The fraction of an oscillation between the vibrations of two oscillating particles, expressed in degrees or radians.
The sum of the random distribution of kinetic and potential energies of all the atoms/molecules in a system.
The energy required per unit mass of a substance to raise its temperature by 1K.
The pressure exerted by a fixed mass of gas is inversely proportional to its volume, provided the temperature of the gas remains constant.
The period of a planet orbiting the Sun squared is proportional to the mean radius cubed.
A gas consists of a large number of particles in rapid, random motion.
There are no gravitational forces.
No intermolecular forces exist except during collisions.
The volume of the particles is negligible compared to the volume of the container.Ok so funny thing is, I'm in the exact same place you are. XC just started, and I'm also training for a half marathon on the side.
DO NOT, I repeat DO. NOT. do anything outside of XC. Just focus on your training there. I went through the first week of practice, continued to do training during the weekend, and quickly got injured. I honestly didn't see this coming either. I have terrible runner's knee and now during practice I get to sit out and do nothing. I can't even walk right and my knee/calf hurts like hell. Its so boring and depressing. XC is a tough sport, so just focus on that. I wish I could have gone back to last week and told myself not to do anything extra... :(WFN #20: Claire’s Dreams
I often wonder what kids dream about, but I’ve never had such a young child share their dreams with me quite like Claire did today! She presumed that since I was IN her dream, that I had experienced her dream too!! The way her mind thinks is so amazing to me! She is just….captivating!
She came up to me and said, just randomly, “Mom, do you remember our dream last night? When it was night
night time and the moon was big and he had a bright face and we were in a big space ship that was going around the moon and we went outside and you smashed the moon’s face and then he actually ate you and then he ate me! Do you remember our dream last night? “
PRECIOUS!!
I started laughing, of course, because that’s so nonsensical! Only Claire would imagine that since I was in HER dream that I must know what she’s talking about! Typical Walston….thinking the world revolves around them….
LOL!
AND THAT’S RIGHT BABY!!! The WALSTON FAMILY NONSENSE POSTS ARE BACK!!! I have 10 more to go to complete my original goal and then of course, you know, I’ll keep the tradition going. Why stop a good thing? You know you love ‘em!I just wanted to share what I heard regarding returns in Manor, Switzerland's biggest department store.
Basically, they take EVERYTHING back, similiarly what John Lewis used to do in the 1990s, because their highest rule is customer satisfaction ("Zufriedenheit oder Geld zurück").
My friend works for Manor, and the stories she tells are sometimes just unbelievable.
case 1: a woman takes her bedsheets which she used for a year there every year (they know her by now in the whole home department...) and exchanges it for a new one.
case 2: a woman brings back a dress with holes which she used for 6 months and gets her money back.
case 3: a woman returns a jeans she wore for 6 months and gets a new pair for it.
case 4: they accept the return of underwear and give you the money back!
Also, apparently lots of people wear their clothes for an occasion (like their own wedding!) and then return it worn and smelly and the staff still take it back with the blessing of the managers.
So, if you keep the receipt and become unhappy after a while (this 30 day rule doesn't mean anything), you can get your money back or exchange it for a new product.
Personally, I have never heard of such a store policy, and I have found returns in other stores to be quite difficult. And imagine that every item you'd like to buy a product it could be a used one? especially underwear, this puts me off shopping there...
I can't believe Manor are making money with this policy?
Clear case of revenue vs profit.
Could have given similar examples about Marks and Spencers in the UK- although they now have tightened up procedures as too many were just taking the ***s.
It's become a new cult in the UK of buying an item of clothing, wearing it then taking it back to the shop. It's even got its own term - "wardrobing".
Looks like it will catch on here if places like Manor allow it so easily.
The prices for those returned and unsellable items will have to be recovered somehow, and will probably be spread over the rest of the stock.
Customer service is pointless when the customer is just taking the piss.
[...] especially underwear, this puts me off shopping there...
I would hope that underwear does not get back on the shelf.
Has anyone actually experienced this? I find it very hard to believe, maybe the friend of the OP was teasing her? Maybe even a rumour spread by Manor to increase sales?
Soiled underwear, how squalid! Surely this cannot be true?
But some people would pay even more for it that way!
Wow, I find that so surprising because it's been my experience that a lot of the stores here in CH have really strict return policies. In particular, they often allow only a very short time period in which something can be returned. I was a MMM Migros a few months ago and asked how long I'd be able to return something, and the cashier said (translation): "Oh, a few days, if you have the receipt."
As though that should be more than enough time.
Even in the UK, there is no obligation for any store to take back and refund anything, if you have just changed your mind- only if it is faulty. Even M&S have cut the 90 day return to 36- which is still hugely generous- but they now examine the items VERY VERY carefully, looking for any sign of wear, labels to ahve been cut off and re-attached, etc.
Les retours et échanges sont possibles dans un délai de 30 jours après réception des articles commandés. Seuls des articles non utilisés, propres, en parfait état, étiquetés et dans leur emballage d’origine peuvent être retournés ou échangés. Les sous-vêtements, les maillots de bain, les collants et chaussettes ne peuvent être ni repris ni échangés. Le remboursement est effectué par le même moyen de paiement que le paiement original, en règle générale dans un délai de 5 jours ouvrés. Aucun remboursement en espèces n’aura lieu sur place.
non-used, clean, as new, with original label/s and packaging.... Underwear, swimwear, tights and socks cannot be returned or exchanged. Credit card purchased must be refunded on the card, not in cash.
I find this very hard to believe too. I think the OP's friend is pulling his leg.
I have returned things to Manor but with a valid reason and never had any issue getting and exchange or a refund but you do have to explain very clearly what the problem is.
Taking bed sheets back a year later because you don'tlike them anymore is not really a valid reasin IMO and I'd be very surprised if they really did exchange them every time.
I bought a suitcase from Manor (own brand) - the wheel broke on the first trip - returned with no questions asked.

I think it depends on the shop but the legal minimum, apparently, is 14 days, product intact, with the receipt.
Can't find the linky right now but I think it's appeared on another thread.
package days

import org.junit.jupiter.api.Assertions.assertEquals
import org.junit.jupiter.api.Test

class Day4Test {
    @Test
    fun testPart1() {
        assertEquals(71708, Day4().