It increases confidence because the more times you conduct the same experiment over and over should either prove your hypothesis right and wrong and eliminate any random occurrences that might affect your results.
Answer:
materials: solid dissolved in a liquid
independent variable: temperature
Explanation:
I got it right
Answer:
27
Explanation:
X axis says any of its values should be multiplied by 9sec. So you would multiply 3 and 9 which gets you 27. Pretty Easy.
D.
Electromagnets are easier to control due to this feature.
Answer:

Explanation:
When the object fall from the top floor it moves with parabolic motion.
This particular case is a horizontal motion of a projectile, so the equation that relates the distance and the time in the y-axes is:

Here: y is the final height, it will be 0, because the object touch the ground.
y₀ is the initial height, it will be h and v₀ in y-axis is zero, because it has a horizontal initial velocity.
So we have:
(1)
We know that the velocity at the x-axes remains constant, then we have:

x is the distance from the base of the building
we can solve it for t and put on (1).

Solving it for x we will have:

But ![v_{0x}=\omega R[\tex]R is the distance from the center of the earth to the top of the building.ω is the angular speed of the earth.Finally:[tex]x=\frac{2h(\omega R)^{2}}{g}](https://tex.z-dn.net/?f=v_%7B0x%7D%3D%5Comega%20R%5B%5Ctex%5D%3C%2Fp%3E%3Cp%3ER%20is%20the%20distance%20from%20the%20center%20of%20the%20earth%20to%20the%20top%20of%20the%20building.%3C%2Fp%3E%3Cp%3E%CF%89%20is%20the%20angular%20speed%20of%20the%20earth.%3C%2Fp%3E%3Cp%3E%3C%2Fp%3E%3Cp%3EFinally%3A%3C%2Fp%3E%3Cp%3E%5Btex%5Dx%3D%5Cfrac%7B2h%28%5Comega%20R%29%5E%7B2%7D%7D%7Bg%7D)
I hope it helps you!