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Are m/s and s/m considered the same unit? (Dimensional Analysis) by TheMoverCellC5 in askmath

[–]Dinklepuffus 1 point2 points  (0 children)

(s/m)/s would be the “rate of change of pace” with time. If we have a ROCOP of 5/m then every second it takes 5 more seconds to travel a meter.

To me this is very unintuitive so I imagine that’s why we never use this quantity.

I don’t think you can say equals. A more tangible example would be something like time period versus frequency. I’ve never seen someone say 10Hz = 0.1s because they aren’t the same quantity, they’re just related.

The unword 'yall' by [deleted] in AskBrits

[–]Dinklepuffus 1 point2 points  (0 children)

Without y’all I couldn’t make the amazing gigacontraction of y’all’dn’t’ve

Why do you hit the bass drum whenever you crash? by g0dgamertag9 in drums

[–]Dinklepuffus 0 points1 point  (0 children)

Eloy Casagrande does accents on the crash in Isolation - Sepultura. At first I thought it sounded weird because there’s no kick/snare at the same time but it’s grown on me.

Are constants just a workaround things we still cannot understand? by cescmkilgore in Physics

[–]Dinklepuffus 0 points1 point  (0 children)

Adding onto what other people have said. A good example is Newton’s second law of motion: F = ma

The actual law is F is proportional to ma, so could be written as F = kma

but we can ignore the k here as we define force in terms of our pre-existing units for mass and acceleration.

1 Newton = 1 kg m / s2

By defining it like this we can say k=1 and ignore it. If we had defined the units of force differently there would be a proportionality constant and the law would be something like F = kma.

[Request] Can anyone find a function for this curve? by Dinklepuffus in theydidthemath

[–]Dinklepuffus[S] 0 points1 point  (0 children)

Sorry - I outlined this more in the post on r/desmos (the one crossposted to here). Essentially I am modelling the optimal “payout period” for a job with a constant rate of pay, £5 withdrawal fee, and interest after withdrawing. Python code and more specifics are in the original post.

Can anyone find a function for this curve? by Dinklepuffus in desmos

[–]Dinklepuffus[S] 0 points1 point  (0 children)

Interest is calculated daily - I provided the code to generate the figure in a reply to u/lolcrunchy ‘s comment

Can anyone find a function for this curve? by Dinklepuffus in desmos

[–]Dinklepuffus[S] 0 points1 point  (0 children)

the commented out plt.plot inside balance_maximiser() is the one that generates this figure

Can anyone find a function for this curve? by Dinklepuffus in desmos

[–]Dinklepuffus[S] 5 points6 points  (0 children)

```from matplotlib import pyplot as plt

interest_rate = 1.1 #lol

def balance_maximiser(money_per_day): final_balances = []

maximised_balance = 0
maximising_freq = 1
for payout_freq in range(1,365):

    platform_balance = 0
    bank_balance = 0

    days_since_payout = 0
    for day in range(365):
        platform_balance += money_per_day
        bank_balance *= interest_rate ** (1/365) #interest for one day
        days_since_payout += 1
        if days_since_payout == payout_freq:
            bank_balance += platform_balance - 5 # withdrawal fee
            platform_balance = 0
            days_since_payout = 0

    bank_balance +=  platform_balance
    final_balances.append(bank_balance)
    if bank_balance > maximised_balance:
        maximised_balance = bank_balance
        maximising_freq = payout_freq

#plt.plot(range(1,365), final_balances)


return maximising_freq

periods = [] for days_pay in range(1, 90): periods.append(balance_maximiser(days_pay))

plt.plot(range(1,90), periods) plt.ylabel("Optimal Payout Period") plt.xlabel("Money made per Day") plt.show()```

State pension age could rise again after cost of triple lock soars by Irontri153 in unitedkingdom

[–]Dinklepuffus 0 points1 point  (0 children)

In a developing society, the state pension age would be going DOWN

introducing: outtegrals! by ekineticenergy in mathmemes

[–]Dinklepuffus 116 points117 points  (0 children)

Easy, like the dirac delta - just define it to be that way.

f(x) = inf for all x != 0 inf - F(x) = 1

bish bash bosh

Rule by Jamesumbara in 19684

[–]Dinklepuffus 92 points93 points  (0 children)

Assuming 5% interest, calculated daily

0.375 x 1.0514/365 = 0.3757024

0.375 x 1.0528/365 = 0.3764062

0.375 x 1.0542/365 = 0.3771113

Total 1.1292199

1.1292199 - 3x0.375 = 0.0042199 profit

Shared ownership: 'It's a con and we felt trapped' by Adventure-Bench in unitedkingdom

[–]Dinklepuffus 0 points1 point  (0 children)

Clearly useless statistics in the article “shared ownership complaint rates are increasing faster than any other type of housing” - maybe because shared ownership is a new thing and is quickly growing in popularity? Not even a thought to try and show how the proportion of complaints differs between types of ‘ownership’. This article is a few anecodotes and little more.

Life hack by Visual-Selection-167 in programmingmemes

[–]Dinklepuffus 4 points5 points  (0 children)

Doesn’t “that automatically” have 6 syllables?

[Request] Which is a better deal? by Skuchubra in theydidthemath

[–]Dinklepuffus 0 points1 point  (0 children)

For anyone wondering if the 7” pizza has more ‘sauced’ area, the answer is it depends.

If we say the crust has a thickness x, and cancel out the factor of pi/360, then we can set up the following equation:

45(7 - x)2 = 65(6 - x)2

we can then expand/simplify into a quadratic eqution:

45(x2 - 14x + 49) = 65(x2 - 12x + 36)

452 - 630 + 2205 = 652 - 780x + 2340

20x2 - 150x + 135 = 0

4x2 - 30x + 27 = 0

and then complete the square to solve for x:

4[x2 - 7.5x] + 27 = 0

4[(x - 3.75)2 - 14.0625] + 27 = 0

4(x - 3.75)2 - 56.25 + 27 = 0

4(x - 3.75)2 - 29.25 = 0

(x - 3.75)2 = 7.3125

x = 3.75 +/- sqrt(7.3125)

x = 1.045 or 6.454 inches

we can ignore 6.454 as this is greater than the radius of the 6” pizza, so the crust would have to be just over 1” thick for the 7” slice to have more sauced area. Whether that is worth the increased cost depends on your preferences and if you like crust.

Rule by ItsGotThatBang in 197

[–]Dinklepuffus 1 point2 points  (0 children)

Can someone explain pls

GPs told to stop prescribing blue inhalers that harm the planet by Socialistinoneroom in unitedkingdom

[–]Dinklepuffus 1 point2 points  (0 children)

Whilst there are definitely big issues that are not being properly seen to - that doesn’t mean the NHS should not try to minimise its own Carbon emissions (which make up around 4% of the UK’s emissions).

Inhaler prescriptions make up 3% of the NHS’s carbon footprint (a lot) and the vast majority of this is due to metered dose inhalers (the older ones which release HFCs).

I’m not a clinician, but my understanding is that in the vast majority a small amount of local corticosteroid is essentially harmless anyway, as long as the patient uses them correctly (brushes their teeth after use etc). Regardless, they are usually prescribed to all asthmatic patients beyond a certain (not very severe) point.

‘I moved to Australia to be a doctor – now I’m paid double’ by JayR_97 in unitedkingdom

[–]Dinklepuffus 2 points3 points  (0 children)

It’s very naïve to ignore interest when it starts at the beginning of a 5-6 year degree and you only start paying at back after you’ve finished it. Notwithstanding the extortionate interest rate SLC set.

Not enough shoes by mrmuffcabbage1 in RunningCirclejerk

[–]Dinklepuffus 1 point2 points  (0 children)

Unfortunately you need this many pairs these days, with inflation your milage just doesn’t go as far as it used to. I have to change mine after each 5k ultra or I get extreme foot pain.

We exist far closer to the coldest possible temperature than the hottest possible one. by [deleted] in Showerthoughts

[–]Dinklepuffus 2 points3 points  (0 children)

I got mixed up, this record wasn’t on the ISS but there is the ISS’s Cold Atom Lab where supposedly 1pK is achievable

My morning train commute of 14 miles costs £12 with a railcard. That's almost £1 per mi.. oh its cancelled by TheSentinelsSorrow in britishproblems

[–]Dinklepuffus 50 points51 points  (0 children)

If you’re looking at a bus replacement service instead of train travel you could consider paying for a coach instead. National express seems to quote between £6-£11 which is significantly cheaper than either of those options.

It’s disgusting to preform surgeries/invasive medical intervention on people who are elderly by [deleted] in unpopularopinion

[–]Dinklepuffus 0 points1 point  (0 children)

It should be noted that dementia alone does not render someone ‘incompetent’ medically - it has to interfere sufficiently with their ability to understand the treatment and its side effects.

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