must all be handwritten please show all work and steps i got this question my wrong my tutor said (you must include the value for Power in Watts and answer in horsepower. ) 63. (II) A driver notices that her 1080-kg car, when in neutral, slows down from 95 km/h to 65 km/h in about 7.0 s on a flat horizontal road. Approximately what power (watts and hp) is needed to keep the car traveling at a constant 80 km/h? i got this question my wrong my tutor said (This problem cannot be solved using Hooke's law, because when the spring is stretched at the point we are looking at, it is not in equilibrium, it is accelerating itself back upwards and changing direction. Therefore, energy needs to be used. 35. (II) A spring with k = 83 N/m hangs vertically next to a ruler. The end of the spring is next to the 15-cm mark on the ruler. If a 2.5-kg mass is now attached to the end of the spring, and the mass is allowed to fall, where will the end of the spring line up with the ruler marks when the mass is at its lowest position? got this question my wrong my tutor said (In the setup of the energy equation, you have to take into account the energy of spring and gravitational energy on one side, and then the kinetic energy of the ball on the other. Both parts of the problem are incorrect due to this, since your initial setup left out gravitational potential energy as well. ) 39. (II) A vertical spring (ignore its mass), whose spring constant is 875 N/m, is attached to a table and is compressed down by 0.160 m. (a) What upward speed can it give to a 0.380-kg ball when released? (b) How high above its original position (spring compressed) will the ball fly? i got this question my wrong my tutor said (For this problem, we want to total work to fill all of the shelves. Add up the values you found, making sure to also include the work done to lift the book from laying flat to standing up. ) 7. (II) In a certain library the first shelf is 15.0 cm off the ground, and the remaining four shelves are each spaced 38.0 cm above the previous one. If the average book has a mass of 1.40 kg with a height of 22.0 cm, and an average shelf holds 28 books (standing vertically), how much work is required to fill all the shelves, assuming the books are all laying flat on the floor to start? i got this question my wrong my tutor said (You went too far. The 5.5 x 10*-19 is the answer. Why did you divide by the charge of an electron? ) 17. (1) How much work is required to stop an electron (m =9.11x10 * kg) which is moving with a speed of 1.10x10 m/s? i got this question my wrong my tutor said (This question is asking what a spring scale will read, which means in Newtons, not kg. Please retry these. ) 51. (II) What will a spring scale read for the weight of a 58.0-kg woman in an elevator that moves (a) upward with constant speed 5.0 m/s, (b) downward with constant speed 5.0 m/s, (c) with an upward acceleration 0.23 g, (d) with a downward acceleration 0.23 g, and (e) in free fall? i got this question my wrong my tutor said (The answer should just be 164.32 years. Since T earth = 1, multiplying by 1*2 = the same value. ) 57. (1) Neptune is an average distance of 4.5 x 109 km from the Sun. Estimate the length of the Neptunian year using the fact that the Earth is 1.50 x 108 km from the Sun on average. i got this question my wrong my tutor said (Incomplete) 59. (1) Use Kepler's laws and the period of the Moon (27.4 d) to determine the period of an artificial satellite orbiting very near the Earth's surface. i got this question my wrong my tutor said (Missing the last steps. First, look at the figure. What do you need to do with your value that you found to get the greatest distance between the sun and comet? Then, find if this is within in the solar system or not.) 65. (11) Halley's comet orbits the Sun roughly once every 76 years. It comes very close to the surface of the Sun on its closest approach (Fig. 5-45). Estimate the greatest distance of the comet from the Sun. Is it still "in" the solar system? What planet's orbit is nearest when it is out there? Halley's comet Sun FIGURE 5-45 Problem 65. i got this question my wrong my tutor said (m2 is incorrect, m1 is correct) 31. (II) Two objects attract each other gravitationally with a force of 2.5 x 10-10 N when they are 0.25 m apart. Their total mass is 4.00 kg. Find their individual masses. i got this question my wrong my tutor said (incorrect, perhaps you forgot to square the parentheses?) 39. (II) Calculate the effective value of g, the acceleration of gravity, at (a) 6400 m, and (b) 6400 km, above the Earth's surface