Answer question 4,5,6,10

4. [-/2 Points] DETAILS OBINPHYS8 5.P.005. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER machinist wishes to insert a copper rod with a diameter of 9 mm into a hole with a diameter of 8.996 mm. By how much would the machinist have to lower the temperature (in .C) of the rod to make it fit the hole? Need Help? Read It Submit Answer 5. [-/2 Points] DETAILS OBINPHYS8 5.P.029. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER As a gasoline engine is running, an amount of gasoline containing 10,800 ] of chemical potential energy is burned in 1 s. During that second, the engine does 3,600 J of work. (a) What is the engine's efficiency (in percent)? (b) The burning gasoline has a temperature of about 4,300F (2,600 K). The waste heat from the engine flows into air at about 90 F (305 K). What is the Carnot efficiency (in percent) of a heat engine operating between these two temperatures? Need Help? Read It Submit Answer 6. [-/2 Points] DETAILS OBINPHYS8 5.P.031. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER An irreversible process takes place by which the entropy of the universe increases by 1.73 J/K. If the temperature of the environment in which the process occurred is 245 K, how much energy (in ]) was made unavailable for useful work as a result? Need Help? Read it Submit Answer 7. [2/2 Points] DETAILS PREVIOUS ANSWERS OBINPHYS8 5.Q.005. MY NOTES ASK YOUR TEACHER Air molecules in a warm room (27'C = 300 K) typically have speeds of about 500 m/s (1,100 mph). Why is it that we are unaware of these fast-moving particles continuously colliding with our bodies? O The mass of an air molecule is so miniscule that its momentum and kinetic energy are too small to be evident in the collision with a human body. Because the air molecules are everywhere around us they constantly collide with our bodies from all directions. The effect of these collisions tend to cancel out. The density of the warm air is so low that the air molecules tend to miss our bodies. The size of an air molecule is extremely small, so its momentum and kinetic energy are not efficiently transferred to our bodies when the collisions with a human body occur. Need Help? Read It Submit Answer 8. [2/2 Points] DETAILS PREVIOUS ANSWERS OBINPHYS8 5.Q.010. MY NOTES ASK YOUR TEACHER What is unusual about the behavior of water below the temperature of 40C? within the range of OC to 4"C the specific heat of water doubles when the temperature decreases, whereas the specific heat of most substances is halved Within the range of OC to 4"C the specific heat of water is halved when the temperature decreases, whereas the specific heat of most substances is d . Within the range of OC to 40C water expands t substances contract. Within the range of OC to 4"C water contracts when the as most substances expand. Need Help? Read It Submit Answer 9. [2/2 Points] DETAILS PREVIOUS ANSWERS OBINPHYS8 5.Q.017. MY NOTES ASK YOUR TEACHER According to the first law of thermodynamics, under what conditions would it be possible for a system to absorb heat from its surroundings yet suffer no change in its internal energy? The system must do a greater amount of work. The system must do no work. The system must do a lesser amount of work. The system must do an equivalent amount of work. Need Help? Read It Submit Answer 10. [0/2 Points] DETAILS PREVIOUS ANSWERS OBINPHYS8 5.Q.020. MY NOTES ASK YOUR TEACHER Double-paned thermal insulating windows consist of two glass panels separated by a narrow gap from which most of the air has been removed to create a near vacuum in the space between the panes. Explain how this design helps to better insulate a home than a window that is made from a single sheet of glass. (Select all that apply.) The vacuum between the two panes of gl as a very efficient insulator. The double-paned window allows for less heat loss through convection The double-paned window allows for less ss through conduction. The vacuum between the two panes of glass acts as a very efficient conductor