A) voltage available to each light remains constant regardless of the number of lights that are on
I took the test
Answer: repeatable
Explanation: Accurate repeatable is needed in a valid experiment. I think
Here easy answer from online
In scientific contexts, mass is the amount of "matter" in an object (though "matter" may be difficult to define), whereas weight is the force exerted on an object by gravity.
Answer:
B. 3.24 m/s²
Explanation:
We can only answer if we make some assumptions.
ASSUMING
1) The box is on a horizontal surface
2) The surface is frictionless (This will give the MAXIMUM acceleration possible)
F = ma
100cos30 = 25a
a = 100cos36 / 25 = 3.23606797...
a ≈ 3.24 m/s
If the average velocity of the duck is zero, it means that the duck's location at the end of the time interval was the same as at the beginning of the interval, but says nothing about the duck's motion during that time.
For instance, the duck could have waddled around in a circle 20 times; as long as it wound up at the starting point, the displacement and average velocity is zero.