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Andreas93 [3]
4 years ago
5

Which scientist was the first to propose the heliocentric model of the universe

Physics
2 answers:
Marianna [84]4 years ago
6 0
The answer would be Nicholas Coperniucus
pav-90 [236]4 years ago
6 0
Nicholas Copernicus
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An arrow is shot at a target 20 m away. The arrow is shot with a horizontal velocity of 80 m/s.
Verdich [7]

(1) The time of motion of the arrow is 0.25 s.

(2) The vertical height dropped by the arrow as it approaches the target is 0.31 m.

The given parameters:

  • <em>Horizontal distance of the arrow, X = 20 m</em>
  • <em>Horizontal speed of the arrow, v = 80 m/s</em>

<em />

The time of motion of the arrow is calculated as follows;

t = \frac{X}{v} \\\\t = \frac{20 }{80} \\\\t  = 0.25 \ s

The vertical height dropped by the arrow as it approaches the target is calculated as follows;

h = v_0_y t + \frac{1}{2} gt^2\\\\h = 0 \ + \ \frac{1}{2} \times 9.8 \times 0.25^2\\\\h =0.31 \ m

Learn more about time of motion of projectile here:  brainly.com/question/1912408

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2 years ago
Which statement best describes a similarity between presidential and
zlopas [31]

The statement 'both allow citizens to vote for members of the legislature' describes a similarity between presidential and parliamentary democracies. They are different forms of government.

<h3>Presidential and parliamentary democracies</h3>

Democracy refers to a form of government where people vote to choose authorities designed to decide legislation.

A presidential democracy is when the presented is voted to be the head of government (president) separately from the legislative system.

Parliamentary democracy is a form of government where the political party having the greatest representation in the legislature forms the government.

Learn more about presidential and parliamentary democracies here:

brainly.com/question/3069300

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3 years ago
A scientist records the motion of an object. She writes down that the
Phantasy [73]
The answer is Velocity
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3 years ago
Which of the following can break solid rock
sergeinik [125]

I would think the answer would be c

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Can someone please help me come up with a hypothesis?. The question that I have is "How many sugars are in your smoothies?"
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'I believe that there is 20 grams of sugar in the smoothies.'

I don't know, just an idea.
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4 years ago
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