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IrinaK [193]
3 years ago
7

Around the turn of the twentieth century, inventor Robert Shuman was engineering products that used energy directly from the Sun

to power motors and farms. He stated that coal and oil would eventually run out and that humans needed to learn how to use the more-abundant energy resource of the Sun. During which stage of technological design did Shuman identify that using oil and coal would be a problem? first second third fourth
Physics
1 answer:
MrRa [10]3 years ago
5 0

Answer: First stage

Explanation:

The four stages of technological design include:

• identifying a problem.

• Designing a solution.

• Implement, build, and test the design.

• Determine if solution met the need.

In this scenario, Robert Shuman identified the problem. This was depicted as he stated that coal and oil would eventually run out and that humans needed to learn how to use the more-abundant energy resource of the Sun,

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One of the primary goals of the Kepler space telescope is to search for Earth-like planets. Data gathered by the telescope indic
amid [387]

Answer:

85.62 m

168.75 years

101.04 years

Explanation:

L_0 = Length of ship = 143 m

v = Velocity of ship = 0.8c

c = Speed of light

s = Distance to Boralis orbit = 135 ly

Gamma value

\gamma=\dfrac{1}{\sqrt{1-\dfrac{v^2}{c^2}}}\\\Rightarrow \gamma=\dfrac{1}{\sqrt{1-\dfrac{0.8^2c^2}{c^2}}}\\\Rightarrow \gamma=1.67

Length contraction is given by

L=\dfrac{L_0}{\gamma}\\\Rightarrow L=\dfrac{143}{1.67}\\\Rightarrow L=85.62\ m

The length is 85.62 m

Time taken

t=\dfrac{s}{v}\\\Rightarrow t=\dfrac{135}{0.8}\\\Rightarrow t=168.75\ years

Time taken from the perspective one Earth is 168.75 years

Time dilation is given by

t'=\dfrac{t}{\gamma}\\\Rightarrow t'=\dfrac{168.75}{1.67}\\\Rightarrow t'=101.04\ years

The time taken from the perspective of the ship is 101.04 years

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3 years ago
A liquid thermometer can be used to test for fevers. When body temperature increases, the liquid inside the thermometer expands
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Answer:

A

Explanation:

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Built an atom of Krypton which has an atomic number of 36?
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Find the center of the galaxy with Shapley method
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Answer:

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Shapley correctly determined the galactic center of the Milky Way to be located in the constellation of Sagittarius. He did this by mapping out a three-dimensional distribution of the globular clusters.

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2 years ago
A camera lens with focal length f = 50 mm and maximum aperture f>2
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Answer:

The minimum distance between two points on the  object that are barely resolved is 0.26 mm

The corresponding distance between the  image points = 0.0015 m

Explanation:

Given  

focal length f = 50 mm and maximum aperture f>2

s =  9.0 m

aperture = 25 mm = 25 *10^-3 m

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Substituting the given values, we get –  

Sin a = 1.22 *600 *10^-9 m /25 *10^-3 m

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Now  

Y/9.0 m = 2.93 * 10 ^-5

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Y’/50 *10^-3 = 2.93 * 10 ^-5  

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