Please show work for 16-20. Work shown not required for 1-15

120 N 14. What is a FALSE statement about entropy? 4 POINTS The disorder of most systems tends to increase The disorder of the universe is increasing The disorder of the universe is decreasing if the disorder of a system is decreasing The disorder of a system can increase or decreases 15. How do the values of us compare to the values of uk for similar 4 POINTS materials in contact? The coefficients of friction are usually identical The coefficient of kinetic friction is almost always larger than the coefficient of static friction No conclusions can be reached The coefficient of static friction is almost always larger than the coefficient of kinetic friction Essay (5 Questions)t7ZiNY9h44jcB5 300J 12. What is the total change in internal energy of a system that does 400 J of work and gains 900 J of heat? 4 POINTS -1300J 1300J 500J -500J 13. How much would a 75 kg man weigh on the moon where the 4 POINTS gravitational field strength has a magnitude of (about) 1.60 m/s?? 740N 75N 860N 120 N 14. What is a FALSE statement about entropy? 4 POINTS31000 N 2. Is it possible for distance and displacement to be exactly the same? 4 POINTS Yes, only if they are in opposite directions. Yes, they are always the same. No, they are never the same Yes, if travel is linear in the positive direction only. 3. Convert a length of 11.0 cm to meters. 4 POINTS 1.1m 0.11m 0.011m 110mVt7ZiNY9n44jcB5 20. Explain how renewable energy technology demonstrates work-energy theorem. BIUS Normal X2 X2 fx Enter your response hereyTF6kVt7ZiNY9n44jcB5 19. If a roller coaster cart starts at rest from a height of 38 meters on its initial hill, 20 PC what velocity will it achieve halfway down this hill if friction is negligible? 38 m BIUS Normal X2 X2 fx Enter your response hereIN PROGRESS Physics I Semester 1 Final ril 160 total points Multiple Choice (15 Questions) 1. What is 3.1x10 4 N in standard notation? 4 POINTS 0.000031N 310000 N 0.00031 N 31000 N 2. Is it possible for distance and displacement to be exactly the same? 4 POINTSNegative because the displacement and force vectors both point downwards 8. The piston cycle system in a gasoline-fueled car is a heat engine that 4 POINTS uses heat to power the car. If 800J of is inputted to the system by the combustion, but 500 J of heat is lost, what is the thermal efficiency of this car? 38% 40% 62% 60% 9. A small 10.0 kg projectile falls off a 20.0 m tall cliff. What is the total 4 POINTS kinetic energy when the projectile is about to hit the ground? 460J 2120 J 980J 1960J6kVt7ZiNY9n44jcB5 1960J 10. You rub your hands together quickly to warm them up. What energy 4 POINTS transformation is happening? Thermal to mechanical energy Electrical to thermal energy Thermal to light energy Mechanical to thermal energy 11. A box is pushed 10 m with a force of 30 N. What is the magnitude of 4 POINTS work done on the box? 30ON 300 W 300 N/m 300J 12. What is the total change in internal energy of a system that does 400 J 4 POINTS/zyTF6kVt7ZiNY9n44jcB5 18. A 2000 kg car speeds up from 30 m/s to 60 m/s in 9 seconds. What must be 20 the average power of the car to accomplish this acceleration? BIUS Normal X2 X2 fx Enter your response hereEssay (5 Questions) Type your answer into the field below. 16. You push a car with a constant force of 25.0 N, making it move with a constant speed of 3.0 m/s. How much work do you apply if you push it for 5.0 s? BIUS Normal E X2 X2 fx Enter your response here6kVt7ZiNY944jcB5 17. A 3500 kg car suddenly hits the brakes and comes to rest by decelerating at a rate of -2 m/$2 on a flat road. 1. Draw a free body diagram of this scenario. 2. What must have been the kinetic friction coefficient between the wheels of the car and the road? BIUS Normal X2 X2 Enter your response here5kVt7ZiNY9n44jcB5 6. Find the resultant force acting on this box. 4 POINTS 3 N 20 N 6 N 18 N due southeast O 21 N due southeast O 11 N due southeast O 29 N due southeast 7. The work done by gravity as a projectile falls is . 4 POINTS Positive because the displacement and force vectors are parallel and in the same direction Negative because the displacement and force vectors are parallel and in opposite direction Zero Negative because the displacement and force vectors both point downwards4. What is a FALSE statement about absolute zero? 4 POINTS It is a theoretical lowest temperature possible, which is a temperature at which particles stop O moving. It is the zero temperature on the Kelvin temperature scale. O It is a temperature that is equivalent on all temperature scales. There cannot be a temperature measured below absolute zero. 5. The total energy captured in a renewable energy source cannot fully be 4 POINTS converted to useful energy. What is the main reason for this mechanical inefficiency? Energy is lost in the form of thermal energy anywhere friction occurs between material. Energy is used to move between objects. O Renewable energy technology are designed to not fully convert the useful energy in order to allow these resources to last longer. Energy is used to transfer one form of energy into another form of energy. 6. Find the resultant force acting on this box. 4 POINTS