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Vadim26 [7]
2 years ago
8

Explain how you can improve the accuracy of a measurement. ​

Physics
2 answers:
yKpoI14uk [10]2 years ago
8 0
You use more significant figures. 5 sigfigs (1.0985) is more accurate than 2 sigfigs (1.0)
Naddik [55]2 years ago
4 0

Answer:

1)By using a measuring ruler

2)By measuring from 0cm

Explanation:

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An airplane flying at a speed of 130 mi/h (58.1 m/s) and at an altitude of 4.9 km drops a food package. Without a parachute, at
telo118 [61]

The food package will strike the ground at 11 degrees below the horizontal.

<h3>Time for the food package to hit the ground</h3>

The time for the food package to hit the ground is calculated as follows;

h = vt + ¹/₂gt²

<em>let the initial velocity be horizontal</em>

4900 = 0(t) + (0.5 x 9.8)t²

4900 = 4.9t²

t² = 4900/4.9

t² = 1,000

t = √1,000

t = 31.62 s

<h3> Final speed of the food package when it hits ground</h3>

vf(y) = vo + gt

vf(y) = 0 + (31.62 x 9.8)

vf(y) = 309.88 m/s

<h3>Angle of projection</h3>

The horizontal component of the speed will be constant, while vertical component will change

tan(\theta ) = \frac{V_y}{V_x} \\\\\theta = tan^{-1} (\frac{V_y}{V_x})\\\\\theta = tan^{-1} (\frac{309.88}{58.1} )\\\\\theta = 79^0

Angle below the horizontal = 90 - 79 = 11⁰

Thus, the food package will strike the ground at 11 degrees below the horizontal.

Learn more about angle of projection here: brainly.com/question/10671136

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2 years ago
Question in picture.
Ber [7]

The answers are to small to see.

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3 years ago
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A copper atom has an atomic number of 29 and an atomic mass of 64. What
Elina [12.6K]

Explanation:

Answer is B.

B. It has a central nucleus composed of 29 protons and 35 neutrons,surrounded by an electron cloud containing 29 electrons.

I hope it's helpful!

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In which of the following is positive work done by a person on a suitcase
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pendajo sMh so stupid

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two horses pull against a rope with forces of 100 newtons in opposite directions. this is an example of
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It is an example of balanced force.


hope this helps. good luck 
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3 years ago
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