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    2 Answers · Science & Mathematics · 07/08/2020

  2. ...½mv² = ½ * 12kg * v² v = 9.8 m /s² 3) W = µmgd = 0.44 * 12kg * 9.8m... It's possible you'll have to give that a negative sign. I consider it understood. 4...

    1 Answers · Science & Mathematics · 07/08/2020

  3. ...by F(net) = F(applied) - F(friction) =>ma = F - μ k x N =>68 x a = 441 - 0.21 x (mg) =>68a = 441 - 0.21 x 68 x 9.8 => a = 4.43 m /s^2 Thus by v = u + at => v = 0 + 4.43 x 4 => v = 17.71 m /s NOTE: As there...

    1 Answers · Science & Mathematics · 06/08/2020

  4. ... the cross product for a proton (positive charge) experiencing F with direction "-j" and v with direction "i" it must be that B has direction " k " -- UP. Since v and...

    1 Answers · Science & Mathematics · 29/07/2020

  5. 1) Δx = mg / k = 2.7kg * 9.8m/s² / 306N/ m = 0.086 m or 8.6 cm 2) F = mg = 5.4kg * 9.8m...39;s Second, net F = ma = 8.1kg * (9.8 - 1.9) m /s² = 64 N All answers to...

    3 Answers · Science & Mathematics · 29/07/2020

  6. ...two of them are a closed system (there ...kinetic energy. Let's call v the final speed of the 2.0 g object... = EP2 + EK2 k q^2 / r = 0.5( 4m1 + m2 ) v ^2 v = 7.746 m /s or 7.7 m /s to 2 sig. ...

    2 Answers · Science & Mathematics · 23/07/2020

  7. ...this: U = 2*(1.602*10^-19 C)* V = 9.239*10^-28/sqrt( a ^2+y^2) J* m Now, equate the final energy U to the initial energy K and solve for y: 9.239*10^-28/sqrt( a ^2+y^2...

    1 Answers · Science & Mathematics · 22/07/2020

  8. ... when leaving the spring: 4.9 m = v * 0.589 s v = 8.323 m /s Now, use conservation of energy on the ball-spring...final state =  1/2 mv^2 1/2 kx^2 = 1/2 mv^2 => 1/2 k (0.21 m )^2 = 1/2(0.02 kg)(8.323 m /s)^2 0.02205 m ^2...

    2 Answers · Science & Mathematics · 22/07/2020

  9. v (rms) = √(3RT/ M ) v² = 3RT/ M M = 3RT/v² M = 3(8.314 J/ K mol)(34 + 273 K )/(214.7)² M = 0.166 kg/mol M = 166 g/mol  or 170 g/mol with 2 sig fig

    2 Answers · Science & Mathematics · 26/07/2020

  10. 1) V = nRT / P = (1.21 mol) × (8.3144626 L kPa/ K mol) × (302 K ) / (101 kPa) = 30.1 L 2) (4/3) × pi x ((2.5 × 10^-10 m ) / 2)^3) = 8.181 × 10^-30 m ^3 = 8.181 × 10...

    1 Answers · Science & Mathematics · 19/07/2020

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