Comments

• well P = W/t and W = F d so P = (F d)/t and d/t = v so P = F v and here F = m g where m = 2L*1kg/L = 2kg then P = m g v 78w = 2kg * 9.81N/kg * v(m/s) v = 3.9755 or about 4m/s

  in Physics power problem? Comment by old-science-guy June 2021
• 799 km N / 2.34 h = 341.45 km/h N this is the resultant draw this vector (up on y axis) to scale then draw 441 at 19.6 deg right of y axis connect the ends of these two vectors make the resultant the diagonal of a parallelogram by drawing the pa…

  in Physics Problem, Grade 12? Comment by old-science-guy June 2021
• although a pendulum is only approximately harmonic it is close enough for small swings in harmonic motion the restoring force and acceleration are proportional to the displacement so the speed is proportional to the distance traveled in a swin…

  in Why does a pendulum keep a same frequency? Comment by old-science-guy June 2021
• although a pendulum is only approximately harmonic it is close enough for small swings in harmonic motion the restoring force and acceleration are proportional to the displacement so the speed is proportional to the distance traveled in a swin…

  in Why does a pendulum keep a same frequency? Comment by old-science-guy June 2021
• you are looking for a ratio of new P to old P P1 / Po = (nRT/V)_1 / (nRT/V)_o n and R do not change so they cancel T1 = 313 K and To = 253 K P1/Po = (313/0.50) / (253/1.0) = 2.47/1 or about 2 1/2 times

  in Ideal gas problem - Chemistry problem? Comment by old-science-guy May 2021
• you are looking for a ratio of new P to old P P1 / Po = (nRT/V)_1 / (nRT/V)_o n and R do not change so they cancel T1 = 313 K and To = 253 K P1/Po = (313/0.50) / (253/1.0) = 2.47/1 or about 2 1/2 times

  in Ideal gas problem - Chemistry problem? Comment by old-science-guy May 2021
• you are looking for a ratio of new P to old P P1 / Po = (nRT/V)_1 / (nRT/V)_o n and R do not change so they cancel T1 = 313 K and To = 253 K P1/Po = (313/0.50) / (253/1.0) = 2.47/1 or about 2 1/2 times

  in Ideal gas problem - Chemistry problem? Comment by old-science-guy May 2021
• although a pendulum is only approximately harmonic it is close enough for small swings in harmonic motion the restoring force and acceleration are proportional to the displacement so the speed is proportional to the distance traveled in a swin…

  in Why does a pendulum keep a same frequency? Comment by old-science-guy May 2021
• well P = W/t and W = F d so P = (F d)/t and d/t = v so P = F v and here F = m g where m = 2L*1kg/L = 2kg then P = m g v 78w = 2kg * 9.81N/kg * v(m/s) v = 3.9755 or about 4m/s

  in Physics power problem? Comment by old-science-guy May 2021