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  1. (3.3 m)*(100 cm /1 m) = (3.3 * 100) cm = 330 cm Yes, you are correct.

    3 Answers · Science & Mathematics · 23/08/2010

  2. Let's take the reference level to be the ground. Since the book is initially on the ground it has 0 potential energy. After being raised 38.5cm or .385m, it's potential energy is given as: (5.5kg)(9.81m/s^2)(.385m) = 20...

    1 Answers · Science & Mathematics · 19/06/2012

  3. PE (J) = mgh = Force(5kg x 9.81m/s²) x Distance(0.026m) = Work (J). = 1.28Joules. = answer to both (a) and (b). (Force = m x g = 5kg x 9.81m/s² = 49.05 N) (Work = Force x Distance = 49...

    2 Answers · Science & Mathematics · 21/10/2007

  4. (a) Potential Energy = mass*gravity*height Height = .211 m PE = 5.1 kg * 9.8 m/s² * .211 m = 10.5 J (b) The work the student did on the book is the same amount of energy the book gains. 10.5 J

    1 Answers · Science & Mathematics · 06/04/2010

  5. a) the increase in the potential energy of the book due to its being moved farther from the center of the Earth is = 5.5 * 9.81 * 0.305 = 14.456 J answer b) work the student did on the book 14.456 J answer

    1 Answers · Science & Mathematics · 03/11/2012

  6. Density = Mass/ Volume = 77.5 / 5.8 = 13.4 g/cc Probably a gold alloy material

    1 Answers · Science & Mathematics · 15/10/2012

  7. Not that hard. E.g. string fastened to and wrapped around an axle; other end of string attached to spring. When spring closes, string is pulled and turns the axle/wheel.

    1 Answers · Science & Mathematics · 22/11/2012

  8. ...positive it is upright. 10 cm from the lens is 10 cm from its vertex where the principal axis meets the...technique is SUV i still remember it from high school . Principle axis is an imaginary line that...

    2 Answers · Science & Mathematics · 31/03/2013

  9. 1400 cm /sec = 14m/sec. a) Time = sqrt.(2h/g) = sqrt.(180/9.8) = 4.286 secs. b) (4.286 x 14) = 60 metres.

    2 Answers · Science & Mathematics · 16/09/2016

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