Please solve all the questions below correctly and promise for thumbs up and good rating on everything

Part A: Knowledge and Understanding Identify the choice that best completes the statement or answers the question. _1. An object moves to the right 10.0 m from the starting point in a time of 1.0 s, then to the left 20.0 m in a time of 3.0 s, and then to the right 5.0 m in a time of 1.0 s. What is the average speed of the object over the whole time interval? a. 0.8 m/s b. -1.2 m/s c. 7.0 m/s d. 1.2 m/s 2. Which statement is true about the type of motion represented by this position-time graph? 50 E 40 30 Position ( : 20 10 Time (s) a. The velocity of the object is decreasing as it moves in an eastward direction. b. The velocity of the object is increasing as it moves in an eastward direction. c. The object is moving in an eastward direction at a constant velocity. d. The velocity of the object is increasing as it moves in a westward direction. 3. What is the average acceleration for the skateboard shown on this velocity-time graph for the period of 2 s to 5 s? 20 Velocity (m/s) Time ( s ) a. 4 m/s2 b. 25 m/s2 c. 3 m/s2 d. 15 m/s2 An ATV has an average acceleration of 1.9 m/s'. If the vehicle accelerates for 4 s and has an initial velocity of 13 m/s [E], what is the final velocity of the ATV? a. 26 m/s [E] b. 21 m/s [E] c. 11 m/s [E] d. 17 m/s [E] w A picture frame is knocked off a wall and accelerates uniformly to the floor. If the picture was hung 2.5 m above the floor and there is no air resistance, which equation would you use to determine how long it takes the picture frame to reach the floor? a. Ad = - b. V1 = V+dN C. Ad - V,At+ - d At d. v? = vi + 2a, Ad _6. A squirrel runs 10.0 m [N] and then turns and runs 8.0 m [W]. What is the squirrel's displacement? a. 12 m [W 280 N] b. 23 m [W 280 N] c. 23 m [W 620 N] d. 12 m [W 380 N] -7. Which of the following will experience the largest amount of air resistance? a. a piece of paper rolled into a tube b. the broad side of a flat piece of paper c. a piece of paper folded into a thin sliver d. a crumpled piece of paper _8. If you launch a ball horizontally out of a window at the same time you drop a ball, which of the following things will happen? a. The ball launched horizontally will slow down. b. The ball that was dropped will hit the ground first. c. Both balls will fall at the same rate. d. The ball that was launched horizontally will hit the ground first. _9 What is the approximate cost of operating a 80 W light bulb for 3.0 h per day for 2 weeks, if theprice of electrical energy is 6c/kWh? a. $20.00 b. $5.00 c. 20c d. 5e 10. Two forces are acting on a 5 kg mass. One of the forces is 10 N south and the other is 15 N east. The magnitude of the acceleration of the mass is a. 25 m/s2 b. 5 m/s c. 3.6 m/s d. 18 m/s 11. As the object moves from point A to point D across the surface, the sum of its gravitational potential and kinetic energies a. increases and then decreases b. remains the same c. decreases and then increases d. decreases only12. A 5 kg mass is placed in an elevator that is accelerating upwards at 4 m/s. The apparent weight of this mass is a. 69 N b. 29 N c. 20 N d. 49 N 13. A wave travels at a speed of 10 cm/s in shallow water. The wavelength of the wave in the shallow water is 2 cm. The speed of the wave in the deep water is 12 cm/s. The wavelength of the wave in deep water is a. 0.6 cm b. 2.4 cm c. 1.7 cm d. 0.42 cm How many changes of state are shown in this heating graph? Temperature . Thermal energy a. 4 c. d 3 15. A string is plucked producing four loops (antinodes). The length of the string is 12 m. The wavelength of the wave must be a. 6 m b. 3 m c. 48 m d. 24 m 16. A scientist is performing an extended experiment and has a sample of 25.0 g of Cobalt-60, which has a half-life of 5.27 years. How much of the sample is left after 2.00 years? a. 18.2 g b. 19.2 g c. 20.8 g d. 19.9 g 17. A pulse on a spring is moving from the right to the left. There is a circle on the right edge of the pulse. As the pulse moves to the left, the circle on the right edge of the pulse will move direction of motion of pulse a. to the left b. to the right . upwards d. downwards 5 18. A student has three resistors and trying to design a circuit that will maximize the amount of current going through it. Which of the following circuit diagrams should he choose for his set up? R2 b. R2 R. MM R3 M Vacurce C. R, R2 d. none of the above 19. If light moves from left to right along the x-axis, then the electric field line vibrates along a. the y-axis and the magnetic field line vibrates along the z-axis b. the x-axis and the magnetic field vibrates along the y-axis c. the y-axis and the magnetic field vibrates along the x-axis d. the x-axis and the magnetic field also vibrates along the x-axis 20. Which of the following accurately describes the Doppler effect? . As an object emitting a sound approaches an observer, the sound waves expand, so that the observer hears a higher frequency b. As an object emitting a sound approaches an observer, the sound waves expand, which reduces their energy and dampens the noise. C. As an object emitting a sound approaches an observer, the sound waves become compressed, so that the observer hears a lower frequency. d. As an object emitting a sound approaches an observer, the sound waves become compressed, so that the observer hears a higher frequency