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ELEN [110]
3 years ago
9

Which event took place during the Copernican revolution, when most people started to believe in a heliocentric model of the sola

r system?
A. Aristotle developed his model of the solar system.
B. Copernicus rediscovered Aristarchus’s heliocentric model.
C. laws of planetary motion.
D. Newton’s theories of gravity were dismissed and considered invalid.
Physics
2 answers:
dem82 [27]3 years ago
7 0

Answer:

B

Explanation:

Just cuz.... b

guajiro [1.7K]3 years ago
4 0
Answer:


B

Explanation:


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The velocity selector in in a mass spectrometer consists of a uniform magnetic field oriented at 90 degrees to a uniform electri
NeTakaya

Answer:

50k/h is the answer to iy

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3 years ago
True or False: If the part you are designing is completely symmetric, you can complete the part by designing just half of the pa
Lana71 [14]

Given what we know, the statement that "if the part you are designing is completely symmetric, you can complete the part by designing just half of the part and using one mirror feature" is true.

<h3>Why is this statement true?</h3>

Symmetry is when something is exactly the same on either side.

This line can be drawn anywhere but is most commonly a vertical line splitting the object in question down the middle.

Since the object is identical on both sides, using a mirror to flip the completed half to the other side, will effectively give you the finished product.

Therefore, given that when something is entirely and perfectly symmetric it will be exactly the same on either side, it is true to say that by designing half of the end product and using a mirror effect to flip it to the other side, you can complete it.

To learn more about symmetry visit:

brainly.com/question/1597409?referrer=searchResults

5 0
3 years ago
If a bird were to start out from the origin (where the student starts) and fly directly (in a straight line) to the school, what
REY [17]

The question is incomplete! The complete question along with answer and explanation is provided below.

Question:

A student bikes to school by traveling first 1.00 miles north, then 0.500 miles west and finally 0.200 miles south.

If a bird were to start out from the origin (where the student starts) and fly directly (in a straight line) to the school, what distance db would the bird cover

Given Information:  

distance towards north = dn =  1.00 mi

distance towards west = dw =  0.500 mi

distance towards south = ds =  0.200 mi

Required Information:  

distance covered by bird = db = ?

Answer:

distance covered by bird = 0.94 miles

Explanation:

As you can see in the attached image, by applying the Pythagoras theorem,

db = √(dn - ds)² + dw²

db = √ (1.0 - 0.20)² + 0.50²

db = √ 0.80² + 0.50²

db = 0.94 miles

Therefore, the bird would cover a distance of 0.94 miles

5 0
3 years ago
Read 2 more answers
A transformer primary has 100 V and 2 A. What is the voltage if the secondary has a current of 1 A?
Nat2105 [25]
50 V. I don't know if this is correct, mainly because I'm in 7th grade.
4 0
3 years ago
A 2.5 kg , 20-cm-diameter turntable rotates at 70 rpm on frictionless bearings. Two 480 g blocks fall from above, hit the turnta
zhuklara [117]

Answer:

Question: What is the turntable's angular velocity, in rpm, just after this event?

A: 39.6 rpm

Explanation:

Assuming that no external torques act on the system (turntable + blocks) during the collision, total angular momentum must be conserved.

Just before that the two blocks fell down on the turntable, the angular momentum is as follows:

L = I * ω

For a solid disk, the moment of inertia is mr²/2, so we can write I as follows:

I = (2.5*((0.2)²/4)) kg.m² = 0.0125 kg.m²

Taking ω as 70 rpm, we get the value of the initial L as follows:

L = 0.0125 kg.m² * 70 rpm = 0.875 kg.m²*rpm

After the collision, the system has a new moment of inertia, that can be expressed as follows:

If = 0.0125 kg.m² + (2*0.48 kg * ((0.2)² / 4)) = 0.0221 kg.m²

As the total angular momentum must be conserved, we can write the following equation:

L = If * ωf

Solving for ωf:

⇒ ωf = L/If = 0.875 kg.m².rpm / 0.0221 kg.m² = 39.6 rpm

5 0
3 years ago
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