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densk [106]
2 years ago
12

Jasmine and her partner want to test to see if there is a relationship between how much of her solar panel is exposed to sunligh

t and how fast her solar car will move. She uses a piece of paper to cover the solar panel different amounts of her solar panel. The chart below shows the data she collected.
Which of the following is the best reason for Jasmine and her partner to take three (3) different trials for this experiment?
They had to fill out all of the lines on the chart.
They wanted at least 15 points to put on her graph.
Any one trial might have been done incorrectly.
The car didn’t work at first.

Physics
1 answer:
katen-ka-za [31]2 years ago
7 0
Any one trial might have been done incorrectly.
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Eduardwww [97]
What do you mean? I'm confused... You need to put the rest  of the question

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3 years ago
A spring is used to stop a 50-kg package which is moving down a 20º incline. The spring has a constant k = 30 kN/m and is held b
Elina [12.6K]

Answer:

0.3 m

Explanation:

Initially, the package has both gravitational potential energy and kinetic energy.  The spring has elastic energy.  After the package is brought to rest, all the energy is stored in the spring.

Initial energy = final energy

mgh + ½ mv² + ½ kx₁² = ½ kx₂²

Given:

m = 50 kg

g = 9.8 m/s²

h = 8 sin 20º m

v = 2 m/s

k = 30000 N/m

x₁ = 0.05 m

(50)(9.8)(8 sin 20) + ½ (50)(2)² + ½ (30000)(0.05)² = ½ (30000)x₂²

x₂ ≈ 0.314 m

So the spring is compressed 0.314 m from it's natural length.  However, we're asked to find the additional deformation from the original 50mm.

x₂ − x₁

0.314 m − 0.05 m

0.264 m

Rounding to 1 sig-fig, the spring is compressed an additional 0.3 meters.

8 0
3 years ago
In Young’s two slit experiment, the first dark fringe above the central bright fringe occurs at an angle of 0.44˚. What is the r
melomori [17]

Answer:

d / λ = 26.7

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   d siyn θ = (m + ½) λ

Let's clear

    d / λ = (m + ½) / sin θ

Let's calculate

   d / λ = (2+ ½) / sin 5.4

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8 0
2 years ago
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Anvisha [2.4K]

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A researcher may use a two-tailed test to evaluate a directional hypothesis.
katovenus [111]

Answer:

true

Explanation:

just took the test

7 0
2 years ago
Read 2 more answers
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