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1. ### A object launched straightup into the air with velocity of 40meters persec fromheight 30m above theground Howmany sec later will hit ground?

8.9 s.....................

3 Answers · Science & Mathematics · 25/11/2019

2. ### suppose the position of a particle is i+3j-2k at t=2pi/3 sec, and suppose the particles velocity at any time t is v(t)=2sin(t)i+2cos(t)j+tk?

Ooh, this is a little messy. a) position s(t) = ∫ v(t) dt s(t) = ∫ [2sin(t) i + 2cos(t) j + t k] dt = -2cos(t) i + 2sin(t) j + ½t² k + C We're told that s(2π/3) = i + 3 j - 2 k, and so i + 3 j - 2 k = -2cos(2π/3) i + 2sin(2π/3) j + ½(2π/3)² k + C...

1 Answers · Science & Mathematics · 29/06/2019

3. ### Why can't we see ALL, EVERY SINGLE ONE, of Hillary's emails since she was using the account for Sec of State business?

If the Russian government can see them all then Americans citizens should be allowed to have a look.

6 Answers · Politics & Government · 13/07/2019

4. ### If your landlord makes false reports of fraud to Social Sec as revenge what can you do?

In regards to social security - they can do nothing with an allegation.  In order to suspend or terminate your benefits they must develop EVIDENCE.  So if the report is false you don't need to do anything except tell them the truth when social security...

1 Answers · Politics & Government · 15/12/2019

5. ### necesito ayuda con unos ejercicios de demostracion de identidades, son: 1.(sec^2x- 1) csc^2x = sec^2x 2.cot^2x sec^2x - cos^2x - csc^2=1?

1. [sec²x - 1] csc²x = [(1/cos²x) - 1] (1/sin²x) …… ∵ secx = 1/cosx, cscx = 1/sinx = [(1/cos²x) - (cos²x/cos²x)] (1/sin²x) …… ∵ cos²x/cos²x = 1 = [(1 - cos²x)/cos²x] (1/sin²x...

4 Answers · Science & Mathematics · 05/06/2019

6. ### Assume a time traveller changed something in the past. This change will creep to the future at a speed n with units Sec/Sec?

I am a time traveller. Whenever I change anything in the past nothing change in the future. The instant change in future is a drama plot which has nothing to do with realty. Sadly the science of time travel is filled with tv shows non sense.

4 Answers · Science & Mathematics · 26/07/2019

7. ### 1. A particle moves along the x-axis according to the function x(t) = 2.00 + 3.00 t – 1.00 t2 meters.?

@ t = 3 sec V = 3-2*3 = -3 m/sec V' = 0 when t' = 1.5 sec ; infact 3-2*1.5 = 0

1 Answers · Science & Mathematics · 09/09/2019

8. ### help with this trig question!?

sec x=-sqrt 2, cos x= -1/sqrt 2= cos^2 x/2 -sin^2 x/2= 1-2 cos^2 x/2 2 cos^2 x/2=1+1/sqrt 2, cos x/2=+/-(1/2(sqrt2/(1+sqrt 2)))=

1 Answers · Science & Mathematics · 21/01/2020

From 0 sec to 2 sec he rose 3 feet when he should have risen only 1 foot...

2 Answers · Science & Mathematics · 18/06/2019

10. ### Flying Physics Class Question?

g = 32.17 ft/sec^2 V = 202*5280/3600 = 296.27 ft/sec acceleration a = g+V^2/r = 32.17+296.27^2 /790 = 143.3 ft/sec^2 143.3 / 32.17 = 4.45 g's or according to SI : speed V...

1 Answers · Science & Mathematics · 03/02/2020