Hello I need help on question 1, question 14, question 9 (part a) and question 4 (part a and b). Thank you!

14. [1/4 Points] DETAILS PREVIOUS ANSWERS SERPSE10 8.4.OP.014.MI. 3/6 Submissions Used MY NOTES ASK YOUR TEACHER A 4.00-kg block is set into motion up an inclined plane with an initial speed of v; = 7.60 m/s (see figure below). The block comes to rest after traveling d = 3.00 m along the plane, which is inclined at an angle of 0 = 30.0 to the horizontal. (a) For this motion, determine the change in the block's kinetic energy. J (b) For this motion, determine the change in potential energy of the block-Earth system. (c) Determine the friction force exerted on the block (assumed to be constant). N (d) What is the coefficient of kinetic friction? Need Help? Read It Master It 15. [1/2 Points] DETAILS PREVIOUS ANSWERS SERPSE10 8.5.OP.016. 1/6 Submissions Used MY NOTES ASK YOUR TEACHER At a bottled water plant, water with a density of 1.00 g/ml passes through a pumping station where it is raised vertically by 5.77 m at the rate of 1,860,000 liters per day. The liquid enters and leaves the pumping station at the same speed and through pipes of equal diameter. (a) Determine the output mechanical power (in W) of the lift station. Ignore any energy loss due to friction. 1217.31 W (b) Assume an electric motor continuously operating with average power 3.70 KW runs the pump. Find its efficiency. 32.9 X Check the definition of efficiency. What is the difference between efficiency and percent efficiency? You may have determined the percent efficiency. Need Help? Read It9. [112 Points] PREVIOUS ANSWERS SERPSE10 8.3.0P.007. 2/6 Submissions Used A box is given a push across a horizontal surface. The box has a mass m, the push gives it an initial speed of vi, and the coefcient of kinetic friction between the box and the surface is \"k' ASK YOURTEACHER (a) Use energy considerations to nd an expression for the distance the box moves before it stops. (Use any variable or symbol stated above along with the following as necessary: g.) 2 d = vi 2m: From conservation of energy we have AE system = Z T. The change in energy of the system is the change in kinetic energy of the box, and the only energy transfer is the work done by friction. Remember to express the work done by friction as a scalar product. (b) What If? If the initial speed of the oox is increased by a factor of 4, determine an expression for the new distance dnew the box slides in terms of the old distance d. 16 yd Need Help? _ 10. [-/2 Points] SERPSE10 8.3.0P.008. 0/6 Submissions Used ASK YOURTEACHER A block of mass m = 2.00 kg is attached to a spring of force constant k = 440 N/m as shown in the figure below. The block is pulled to a position xi = 4.55 cm to the right of equilibrium and released from rest. (a) Find the speed the block has as it passes through equilibrium if the horizontal surface is frictionless. iii We (in) Find the speed the block has as it passes through equilibrium (for the first time) if the coefcient of friction between block and surface 15 \"K = 0.350. i m/s Need Help? 4. [2/4 Points] PREVIOUS ANSWERS SERPSE1O 8.2.0P.003.M|. 1/6 Submissions Used ASK YOUR TEACHER A head with a hole through it slides on a wire track. The wire is threaded through the hole in the bead, and the bead slides without friction around a loop-the-Ioop (see gure below). The bead is released from rest at a height h = 3.30R. O l A I: O L R >i , G) (a) What is its speed at point A? (Use the following as necessary: the acceleration due to gravity 9, and R.) v = \\/ 4.60gR X (b) How large is the normal force on the bead at point A if its mass is 4.90 grams? magnitude l0,173 ix N direction l downward v \\/ (c) What If? What is the minimum height h from which the bead can be released if it is to make it around the loop? (Use any variable or symbol stated above as necessary') h= 2R J Need Help7 MY NOTES ASK YOUR TEACHER 1. [-/4 Points] DETAILS SERPSE10 8.1.OP.001. 0/6 Submissions Used Consider the following systems and time intervals and then select the appropriate version of the conservation of energy equation shown below. AK + AU + Ent = W+ Q+ TMW+TMT+TET + TER' (a) the heating coils in your toaster during the first five seconds after you turn the toaster on O AEint = Q + TET + TER O AK + AU + AEint = W + Q + TMW + TMT O AU = Q + TMT Oo = Q+ TMT + TET + TER O AK = W + Q O AE int = W + Q + TET O AU = W + Q+ TMW+TMT (b) your automobile from just before you fill it with gas until you pull away from the gas station at speed v O AEint = Q + TET + TER O AK + AU + AEint = W + Q + TMW + TMT O AU = Q + TMT O 0 = Q+ TMT + TET + TER O AK = W + Q O AE int = W + Q + TET O AU = W + Q+TMW+TMT (c) your body while you sit quietly and eat a peanut butter and jelly sandwich for lunch O AEint = Q + TET + TER OAK + AU + AEint = W + Q+ TMW+ TMT O AU = Q + TMT O 0 = Q+ TMT + TET + TER O AK = W + Q O AEint = W + Q + TET O AU = W + Q+ TMW+TMT (d) your home during five minutes of a sunny afternoon while the temperature in the home remains fixed (Assume that the house uses both electricity and natural gas.) O AEint = Q + TET + TER O AK + AU + AEint = W+ Q+TMW+TMT O AU = Q + TMT O 0 = Q + TMT + TET + TER O AK = W + Q O AE int = W + Q + TET O AU = W + Q+TMW+TMT Need Help? Read It