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If you don't know all the answers PLEASE DONT ANSWER! This is my semester exam! Please help me!
1. Scientists seek to acquire knowledge and understanding of the real world through the formulation, testing, and evaluation of what?
A. scientific hypothesis
B. technology
C. deductive reasoning
D. scientific method
2. A scale measures the weight of a light object to be 11.000 lbs ± 0.034 lbs. What is the uncertainty if this same scale is used to measure an object that weighs 78.000 lbs? Assume that the percent uncertainty of the scale remains constant.
A. 0.240 lbs
B. 0.044 lbs
C. 0.034 lbs
D. 0.310 lbs
3. What does the process of scientific inquiry start with?
A. It starts with a problem to solve or a question to answer.
B. It starts with finding supporting data.
C. It starts with a test performed by researchers in a laboratory.
D. It starts with a checklist of procedures used or materials needed.
4. A mouse in a maze scurries 41 cm south and then takes a 90-degree turn and scurries 64 cm west to get a piece of cheese. Find the mouse's displacement.
A. southwest
B. zero
C. 76 cm southwest
D. 105 cm
5. When might an object's average velocity be equal to its average speed in two dimensions?
A. The object's average velocity will never be equal to its average speed, in magnitude or direction, because average velocity will be negative and average speed will be positive
B. If the object moves in a straight line in one direction represented as positive, then the direction and magnitude of the average velocity will be equal to the average speed.
C. If the object does not loop back to its starting position, then the average velocity will be equal to the average speed.
D. If the object moves in a straight line in one direction represented as positive, then the magnitude of average velocity will be equal to the average speed.
6. Attached
7. What is the range of a bullet fired horizontally at a height of 1.5 m with an initial velocity of 120 m/s?
A. ≈ 0.55
B. There is not enough information to find the range of the bullet.
C. ≈ 66.4 m
D. −9.8 m/s2
8. What two vertical forces act on a falling leaf?
A. weight, pull
B. pull, friction
C. weight, friction
D. weight, push
9. What is equal and opposite to the applied force on a spring?
A. equilibrium
B. displacement
C. spring constant
D. spring force
10. Attached
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