Final Exam Review solved PDF

Preview

Summary

Download Final Exam Review solved PDF

Description

Name:___________________________________________________ Physics 101 Final Exam Study Guide 1) When a dish falls, will the impulse be less if it lands on a carpet than if it lands on a hard floor? A. No, both are the same. B. Yes, less if it lands on the carpet. C. No, less if it lands on a hard floor. 2) True or False: I can create energy under the right circumstances. False

3) A shiny sports car at the top of a vertical cliff has a potential energy of 100 MJ relative to the ground below. Unfortunately, a mishap occurs and it falls over the edge. When it is three quarters of the way to the ground, its kinetic energy is A. 25 MJ. B. 50 MJ. C. 100 MJ. D. 75 MJ 4) Which object has greater inertia? A. 12-kg bowling ball B. 5-kg bottle of soda C. They have the same amount of inertia D. Not enough information. 5) Suppose the circumference of a bicycle wheel is 2 meters. If it rotates at 3 revolution in 3 seconds when you are riding the bicycle, then your speed will be: A. 2 m/s. B. 1.02 m/s. C. 3 m/s. D. 3.14 m/s. 6) Glass in a florist's greenhouse acts as a one-way valve in that it A. lets light energy flow only in one direction. B. is transparent only to lower-frequency waves. C. cuts off unwanted radiation. D. allows high-frequency waves in and blocks low-frequency waves exiting. 7) What condition is necessary for a process to be adiabatic? A. No work is done by the system B. The first law of thermodynamics must be obeyed C. No heat enters or leaves the system D. The internal energy of the system does not change 8) Name two of Newton’s Laws. 1) Law of inertia: An object in motion will stay in motion, an object is rest will stay at rest unless acted on by an outside force. 2) Force: mass* acceleration

3)equal and opposite forces

9) A 10-cm-long spring extends to 16 cm when a 1-kg load is suspended from it. What would be its length if a 3-kg load were suspended from it? A. 30 cm B. 28 cm C. 25 cm 10) When Sanjay pushes a refrigerator across a kitchen floor at a constant speed, the amount of friction between the refrigerator and the floor is A. less than Sanjay's push. B. equal to Sanjay's push. In can be both in the exam it will either B or C both going to be correct C. equal and opposite to Sanjay's push. D. more than Sanjay's push. 11) What are the two laws of thermodynamics? First law:  energy is conserved (cannot be created or destroyed)  Heat added to the system= increase in internal energy + work done by the system. Second law  Heat does not spontaneously go from cold to hot  Order tends to disorder  Net entropy is always increasing

12) A cannonball shot from a cannon with a long barrel will emerge with greater speed because the cannonball receives a greater A. average force. B. impulse. C. Both of the above. D. None of the above. 13) The direction of natural processes is from states of A) disorder to equilibrium B) disorganization to organization C) organized states to disorganized states 14) Temperature is most closely related to molecular A. Mechanical energy in general. B. Electrical energy C. Kinetic energy D. Potential energy

15) If a red-hot thumbtack is immersed in warm water, the direction of heat flow will be from the A. warm water to the red-hot thumbtack. B. red-hot thumbtack to the warm water. C. There will be no heat flow. D. Not enough information. 16) When you stand with only one of your feet on a weighing scale, the pressure on the scale is A. half. B. the same as with both feet. C. doubled. D. none of the above 17) Does energy need to be added or removed when going from a solid to a liquid? A. Added B. Removed 18) Which of these vary for satellites in circular orbits? A. speed. B. momentum. C. kinetic energy. D. all of the above E. none of the above Explanation:

(In circular orbit nothing changed If it elliptical orbits then all would change.) 19) An object covers a distance of 12 meters in the first second of travel, another 12 meters during the next second, and 12 meters again during the third second. Its acceleration is A. 12 m/s2 B. 0 m/s2 C. 36 m/s2 D. 4 m/s2 20) When a gas in a container is squeezed to half its volume with no change in temperature, the gas pressure A) halves. B) doubles. C) quadruples. D) remains the same. 21) When work is done on a system—for example, compressing air in a tire pump—the temperature of the system A. increases. B. decreases. C. remains unchanged. D. is no longer evident. 22) Ice is put in a picnic cooler. To speed up the cooling of cans of beverage, it is important that the ice A. melts. B. is prevented from melting.

C. be in large chunks. D. None of the above. 23) Compared to the density of a kilogram of feathers, the density of a kilogram of lead is A. less. B. more. C. the same. Remember mass / volume 24) An automobile is accelerating when it is A. slowing down to a stop. B. rounding a curve at a steady speed. C. Both of the above. D. Neither of the above.

25) The net force acting on an insect falling downward at constant velocity is A. zero. B. the weight of the insect. C. upward air resistance. D. none of the above

So there is a way to the insect there is upward air resistance, but if it's falling at a constant velocity those cancel each other out to the net force is zero...