# Yahoo Web Search

1. ### QUANTUM PHYSICS QUESTION (Best answer gets many points)?

...u-hat) u-hat + (A ▪ v -hat) v -hat. This is what the equation...gt; . This tells you how long | ψ > is along | φi >. ...change basis, you need to project your state vector onto the basis to see how long it...

1 Answers · Science & Mathematics · 31/10/2016

2. ### Physics motion & falling object question?

...negative square root since by convention down is negative. c) Impossible to state without knowing the time duration of the impact. a = Δ v / Δt = (0 - -4.4)m/s / Δt so if Δt = 4.4 ms, then a = 4...

1 Answers · Science & Mathematics · 11/09/2016

3. ### Physics Kinematics Questions help?

...can do the rest you just have to use the three equations of uniform acceleration : v = u+at v ^2 = u^2 + 2as s = ut + 1/2*a*t^2

1 Answers · Science & Mathematics · 01/03/2016

4. ### Physics: Does anyone have an idea how long a juggling cube takes to be released.?

...hand: Equation: V² = u² + 2*a*s V = final velocity = 0m/s u = initial velocity - what we want a...9.81)*0.3 u² = 5.886 u = 2.43m/s You state that the hand moves 6cm in increasing the velocity...

2 Answers · Science & Mathematics · 14/01/2014

5. ### Free fall question???????

...want to do calculus every time you solve one of these) v _f = v _i + a t x_f = x_i + ( v _i) t + ½ a t² where "i" ad "f" denote initial and final states , respectively. Choose a coordinate system. I'll choose something quite conventional...

3 Answers · Science & Mathematics · 21/05/2013

6. ### Electrons accelerated by a potential difference of 13.02 V pass through a gas of hydrogen atoms at room temper?

... through a potential difference of 13.02 V , its kinetic energy is 13.02eV. ... = -13.6/1² = -13.6eV (ground state ) We need to find the highest energy level to...

3 Answers · Science & Mathematics · 22/03/2013

7. ### A child throws a apple from a tree (4m high) with velocity of 5m/s [35 degrees above horizontal]?

... is the answer found in part a. c) v (t) = at + v0 Decompose vx(t) = 0 * t + Vx0... found in part a. Assuming you need to state the final velocity in magnitude-direction form magnitude = sqrt(vx^2...

2 Answers · Science & Mathematics · 12/03/2013

8. ### PHYSICS QUESTION: A person on an apartment balcony holds a ball over the balcony and throws it directly upward?

...up. 1) how high does ball go above balcony: V / A = T, V /2 x T = distance (up) 2) how long to hit the ground: D = balcony + up, use: Down =AT^2/2...

1 Answers · Science & Mathematics · 25/02/2013

9. ### Physics Help PLZ!!!!!!!!!!!!!!!!!!?

...: what the gravity is doesn't matter, as long as there is gravity, since it affects all mass...mass needing support = 0.12 kg Then 0.12kg = V * (1.2 - 0.2)kg/m³ = V * 1kg/m³ V ...

1 Answers · Science & Mathematics · 13/01/2013

10. ### Force exerting on a wall? Physics Lab!?

... = ma so m = F/a and v = at so mv = (F/a)(at) thus mv... not matter what time you select as long as you have thought about and have.... It's always good to state that the time is an estimate if you...

1 Answers · Science & Mathematics · 26/12/2011