Question Details

General Academic Homework Help

• 1. (TCO 1) Convert 9.60 L to mL. Round to three significant digits. (Points : 10)

1. 2 (TCO 1) What are some advantages of using scientific notation to express very large or very small numbers? (Points : 10)
2. 3  While driving at 85 km/h, how far can you travel in 1.15 h? (Points : 10)
3. Question 4.4. (TCO 2) A sports car accelerates from a standing start to 65 mi/h in 4.51 seconds. What is the car’s acceleration in ft/s²? How far can the car travel in that time? (Points : 10)
4. 5. (TCO 3) A large truck collides head-on with a cyclist. During the collision, the truck exerts a force on the cyclist. Does the cyclist exert a force on the truck? If so, is the force exerted by the cyclist on the truck greater than, less than, or equal to the force exerted by the truck on the cyclist?(Points : 10)
5. 6. (TCO 3) Which object has a greater momentum: a stationary tractor-trailer or a tossed tennis ball? Explain your answer. (Points : 10)
6. 7. (TCO 3) Newton's Third Law suggests that a book sitting on a flat table experiences an upward force because of the table. If this is true, why doesn't the book start moving upward? (Points : 10)
7. 8. (TCO 3) A cyclist and her bicycle have a combined mass of 75.0 kg. If the frictional force acting against the motion of the bicycle is -25.3 N, what force must the cyclist apply to maintain a constant velocity? (Points : 10)
8. 9. (TCO 4) A 65.0 g bullet is fired vertically with an initial velocity of 123 m/s. What is its velocity at its highest point of travel? What maximum height does it reach? At what velocity does it hit the ground? (Points : 10)
9. 10. (TCO 4) Two cyclists who weigh the same and have identical bicycles ride up the same mountain, both starting at the same time. Joe rides straight up the mountain, and Bob rides up the longer road that has a lower grade. Joe gets to the top before Bob. Ignoring friction and wind resistance, compare the amount of work done by the two cyclists. Compare the power exerted by the two cyclists. (Points : 10)
10. Question 1.1. (TCO 5) A motorcycle wheel turns 100 pie rad during 35.0 s. What is the angular velocity of the wheel? (Points : 10)
11. 2. (TCO 5) A wheel accelerates from rest to 59 rad/s at a rate of 29 rad/s². Through what angle (in radians) did the wheel turn while accelerating? (Points : 10)
12. 3. (TCO 6) Find the mechanical advantage of a ramp 18.0 m long and 6.00 m high. Find the force required to pull a box of mass 985 kg up the ramp. Disregard friction. (Points : 10)
13. 4. (TCO 6) A system consisting of two fixed and two movable pulleys has a mechanical advantage of 8.00. If a force of 124 N is exerted, what weight can be raised? (Points : 10)
14. 5. (TCO 7) Convert 34.0 °C to Kelvin. (Points : 10)
15. 6. (TCO 7) Heat is added to a 5.0 kg piece of ice at a rate of 454.0 kW. How long will it take for the ice at 0.0 °C to melt? (For water, L_f
    
16. 7. (TCO 8) Find the index of refraction of a medium for which the angle on incidence of a light beam is 35.3° and the angle of refraction is 22.9°. (Points : 10)
17. 8. (TCO 8) What is a photon? (Points : 10)
18. 9. (TCO 8) How long does it take a radar signal to go and return to the originating radar unit from an airplane 40,000 m away? (Points : 10)
19. 10. (TCO 8) A light source's intensity is doubled. What will happen to the illumination E on the screen? (Points : 10)