Which of the following lab safety guidelines is relevent to this experiment?
Question 1 options:
Use wet paper towels or a fire extinguisher to put out small fires.
Ensure that you have a clean working space to minimize errors.
Wear goggles when heating substances to boiling.
If you spill chemicals on your skin, flush with water and tell an adult.
Question
2 (2.5 points)
Identify the dependent and independent variables for Part 1 of this experiment.
Question 2 options:
Independent - shoe, Dependent - friction
Independent - friction, Dependent - shoe
Independent - shoe, Dependent - weight
Independent - weight, Dependent - shoe
Question 3 (2.5 points)
Which of these had the LARGEST frictional force?
Question 3 options:
The athletic shoe without added mass
The athletic shoe with added mass
The dress/dance shoe without added mass
The dress/dance shoe with added mass
Question 4 (2.5 points)
Which of these had the SMALLEST frictional force?
Question 4 options:
The athletic shoe without added mass
The athletic shoe with added mass
The dress/dance shoe without added mass
The dress/dance shoe with added mass
Question 5 (2.5 points)
Would changing the floor change the amount of friction that the shoes experience?
Question 5 options:
No, friction does not depend on the floor just the shoe.
No, all floors have a fixed amount of friction.
Yes, the rougher the surface, the more friction it has.
Yes, the smoother the surface, the more friction it has.
Question 6 (2.5 points)
Which forces are acting on the shoe as you drag it across the floor?
Question 6 options:
friction and applied
friction, applied, and gravity
friction and gravity
friction, applied, gravity, and normal
Question 7 (2.5 points)
What units are the correct units for measuring force?
Question 7 options:
Newtons
meters
kilograms
Newton meters
Question 8 (2.5 points)
What is the difference between kinetic and static friction?
Question 8 options:
kinetic friction is when the object moves, static is when it is still
kinetic friction is when the object is still, static is when the object is moving
both kinetic and static friction happen only when the object is moving
both kinetic and static friction happen only when the object is still
Question 9 (2.5 points)
Which shoe was able to be raised to a greater angle?
Question 9 options:
The athletic shoe could be lifted to a higher angle.
The dance/dress shoe could be lifted to a higher angle.
Both shoes could be lifted to the exact same angle.
Both shoes slid immediately.
Question 10 (2.5 points)
Why do we repeat the trial to make sure that the shoe slides down the board?
Question 10 options:
To eliminate or minimize human error due to bumping the board.
To eliminate or minimize human error from stacking the board on books.
To make sure we have the best possible measurements.
All of the other answers are correct.
Answers: 2
Physics, 21.06.2019 23:00
Follow these directions and answer the questions. 1. set up the ripple tank as in previous investigations. 2. bend the rubber tube to form a "concave mirror" and place in the ripple tank. the water level must be below the top of the hose. 3. generate a few straight pulses with the dowel and observe the reflected waves. do the waves focus (come together) upon reflection? can you locate the place where the waves meet? 4. touch the water surface where the waves converged. what happens to the reflected wave? 5. move your finger twice that distance from the hose (2f = c of c, center of the curvature) and touch the water again. does the image (the reflected wave) appear in the same location (c of c)? you may have to experiment before you find the exact location. sometimes it is hard to visualize with the ripple tank because the waves move so quickly. likewise, it is impossible to "see" light waves because they have such small wavelengths and move at the speed of light. however, both are examples of transverse waves and behave in the same way when a parallel wave fronts hit a curved surface.
Answers: 1
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If forces acting on an object are unbalanced. true or false
Answers: 1
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If you put a helium-filled balloon in the refrigerator, what will happen?
Answers: 1
Physics, 22.06.2019 18:00
Consider an ideal gas at 27.0 degrees celsius and 1.00 atmosphere pressure. imagine the molecules to be uniformly spaced, with each molecule at the center of a small cube. what is the length l of an edge of each small cube if adjacent cubes touch but don't overlap?
Answers: 2
Which of the following lab safety guidelines is relevent to this experiment?
Question 1 options:
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