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1. ### First order reaction - rate constant (k)?

...you're given Ea and two temps and asked to calc k .. .. . .whenever you read Ea, T and k (or rate) in the same equation...

2 Answers · Science & Mathematics · 01/06/2020

2. ### A spring with k=130.0 N/m on surface is mounted to a vertical wall . A 5.00-kg box on the surface is placed in front of the spring. The coef?

...86 N f = μN = μmg = (0.4)(5)(9.81) = 19.62 N Fs = kΔx = (130)(0.8) = 24 N 86 - 19.62 - 24 = (5)a a = 8.5 m/s²

1 Answers · Science & Mathematics · 31/05/2020

3. ### A motorcycle is moving at 32ms^1. The driver hit the brakes... The motorcycle comes to rest in 16seconds. Question:...?

a = -k√(16 - t) => -k(16 - t)^(1/2)  so, dv/dt = -k(16 - t)^(1/2) Then, v(t) = (2/3)k(16 - t)^(3/2) When t = 0 we...

1 Answers · Science & Mathematics · 28/05/2020

4. ### What’s your most favourite place in the U.K?

The English Riviera (Torbay in Devon).

7 Answers · Entertainment & Music · 27/05/2020

5. ### What’s your view on the U.K. Government relaxing social distancing ?

We let Cheltenham continue and a football match with an Italian team who were in lockdown back home , it was condemned as a a big mistake ,as the disease was spread among the crowds attending , at 300 deaths a day now it is lot more...

12 Answers · News & Events · 30/05/2020

6. ### Can you help me how to find the formula?

The "at least k" part is problematic. If i is the number of ...

2 Answers · Science & Mathematics · 29/05/2020

7. ### j.k rowling is not "transphobic" she is pro human rights why do people support killing people for wrong think?

bout time some one pointed out that a state and nation that chooses to need work for survival is commiting murder when they give their citizens the right to fire people for things other then shotty work. i don't support doing so and the only logical reason they say what they do about...

2 Answers · Society & Culture · 28/05/2020

8. ### Are you tired of winning with 100+k people dead, 40+ million people unemployed and our cities on fire?

That's not fair.  He's also alienated our allies, emboldened our enemies, encouraged racism and divisiveness, attacked the media, made facts optional, helped hasten the destruction...

8 Answers · Politics & Government · 02/06/2020

9. ### A scientist begins with 40 grams of a substance. After 6 days, the sample has decayed to 28 grams. Find the half-life of substance?

M = 40 e^(k t ).....26 = 40 e^(6 k) ==> e^k = (13/20)^(1/6)........1 = 2 (13/20)^(t / 6) .....(1/2)^6 = (13/20)^t ....t =  6 ln (1/2) / ln (13/20)........≈ 9.65 days

1 Answers · Science & Mathematics · 02/06/2020

10. ### physics question...?

f = √ g / k fe = √ ge / k fm = √ gm / k fm/fe = √ gm/ge = √ 1/6 or 1/√ 6 since ω = 2PI*f, then ωm/ωe = 1/√ 6 and ωm = ωe/√ 6 ( answer F )

1 Answers · Science & Mathematics · 02/06/2020

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