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Chapter 10 Measuring the Stars

Chapter 10 Measuring the Stars

Chapter 10 Measuring the Stars. Chapter 10 Measuring the Stars. Units of Chapter 10. The Solar Neighborhood Luminosity and Apparent Brightness Stellar Temperatures Stellar Sizes The Hertzsprung–Russell Diagram Extending the Cosmic Distance Scale Stellar Masses. Question 1.

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Apparent Weight

Apparent Weight

Apparent Weight. Drag Force and Terminal Velocity. Apparent Weight. Our perception of weightlessness is really the absence or reduction of normal (contact) forces acting upon our body. . Conversely, we can feel heavier if the normal (contact) forces acting on us are larger than normal . .

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Apparent Weight

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Apparent Weight. apparent weight - weight force that we actually sense not the downward force of gravity, but the normal (upward) force exerted by the surface we stand on - opposes gravity and prevents us falling to the center of the Earth - what is measured by a weighing scale.

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Apparent Motion

Apparent Motion

Apparent Motion. What is apparent motion?. Important to understand what we see and what is actually happening. Apparent motion is what we see from Earth Actual motion is what is really happening

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Apparent Weight

Apparent Weight

Apparent Weight. General Physics. Apparent Weight. Definition: The force exerted by the scale (F N ) Free-body Diagram: Equations: F net = F N + F g ( free-body diagram) F net =ma (Newton’s 2 nd Law) So, ma = F N + F g F g = mg (weight). F N. F g.

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Apparent Weight

Apparent Weight

Apparent Weight. Acceleration of Gravity. Objects that fall to the Earth all experience an acceleration. The acceleration due to gravity is g = 9.8 m/s 2 . This acceleration must be due to a force. The acceleration of a falling mass m is - g.

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Apparent Weight

Apparent Weight

Apparent Weight. Acceleration of Gravity. Objects that fall to the Earth all experience an acceleration. The acceleration due to gravity is g = 9.8 m/s 2 . This acceleration must be due to a force. . The acceleration of a falling mass m is - g .

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Apparent weight

Apparent weight

Apparent weight. If an object subject to gravity is not in free fall, then there must be a reaction force to act in opposition to gravity. We sometimes refer to this reaction force as apparent weight. Elevator rides. When you are in an elevator, your actual weight (mg) never changes .

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Apparent Weight

Apparent Weight

How can NASA provide a sensation of weightlessness without the expense and high risk of sending astronauts into space? https://www.youtube.com/watch?v=6NvBGb5lf78.

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Apparent Weight

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Apparent Celestial Movements

Apparent Celestial Movements

Apparent Celestial Movements. What are Celestial objects?. The things seen in our sky that are outside of the Earth’s atmosphere. Sun Moon Stars Planets. What is a Celestial Sphere?. The dome of night sky above your location extending from strait up to the horizon 360 degrees around.

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