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  1. You have used all of the allotted 110 characters in the first section and not completed the question. Try again putting the sentence beginning with 'Suppose' in the box marked Now add a little more detail...

    2 Answers · Science & Mathematics · 09/03/2010

  2. From your problem statement it sounds like you're only interested in the vertical dimension, and you also need to neglect the effect of aerodynamic drag. With these assumptions, right before the ball hits the ground it has converted...

    2 Answers · Science & Mathematics · 15/07/2012

  3. we are going to work this out by using momentum mass of fisherman = 126kg mass of package=15m speed of boat =0m/s speed of package= 4.6m/s momentum before = momentum after (126 x 0) ( 15 x 4.6) = (126v) ( 15 x 0) [ the package will eventually come to rest afterwards] 69= 126v 69/126= v v=0.55m/s...

    2 Answers · Science & Mathematics · 02/05/2017

  4. The answer is C, because in the spectators frame the sprinter is going .99c and light is traveling @ 1.00c: However in the frame of the runner, the light it STILL traveling @ 1c, the runner will say that the light beat him by...

    2 Answers · Science & Mathematics · 20/05/2011

  5. a) The work done by the horizontal force = F*d*cos(theta) Here: F = 80 N, d = 4.8 m (displacement), theta = 39 degree (angle between the force and the direction of motion). Therefore W = (80)(4.8)(cos39) = 298 J b) To find the final kinetic energy we will find the...

    2 Answers · Science & Mathematics · 01/11/2012

  6. v^2=u^2 + 2as (3rd equation of motion) where v=final velocity (0); u = initial velocity; a=acceleration (-10 m/s^2) and s=distance (320m). So u^2 = 2as = 2 x 320 x 10 = 6400. This gives u = 80 m/s

    3 Answers · Science & Mathematics · 12/09/2006

  7. first calculate the time it took for sound to travel 45m v = d/t so t = d/v t = 45/330 t = .13636 secs subtract this time from the total time t = 1.45989 - .13636 t = 1.32353 secs last, using the remaining time, find the average velocity of the thrown ball v = d/t v = 45/1.32353 v = 34 m...

    3 Answers · Science & Mathematics · 22/12/2012

  8. For a solid sphere, I = (2/5)mr² and rotational KE = ½Iω² = ½ * (2/5)mr² * (v/r)² = (1/5)mv² So: translational KE = ½ * 7.1kg * (4.6m/s)² = 75 J rotational KE = (1/5...

    2 Answers · Science & Mathematics · 09/11/2013

  9. Helium is monoatomic. While Hydrogen is diatomic. Therefore, Since the molecular weight Helium is 2 and a diatomic Hydrogen is 2. I believe the speeds should be exactly the same. EDIT...

    2 Answers · Science & Mathematics · 12/11/2012

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