The birds can glide in the air without moving their wings by maintaining the thrust of the air by their weight and move downward at a very slower rate.
Further Explanation:
The birds have a capability of flying high in the air without flapping their wings and still not falling down rather they glide downwards due to the up thrust of the air. This technique of the birds to keep them in the air without flapping their wings is termed as soaring.
The soaring birds make use of the air current and its thrust on their primary wings so that there is no turbulence experienced by them due to the pointed tips of their primary wings.
The birds should possess some mass in order to maintain a balance between the thrust and the weight of their body. That’s why the small birds are not able to maintain their flight but the bigger birds like vulture, eagle etc. experience sufficient air drag in order tio maintain their flight.
Thus, the birds can glide in the air without moving their wings by maintaining the thrust of the air by their weight and move downward at a very slower rate.
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Answer Details:
Grade: High School
Subject: Physics
Chapter: Up thrust
Keywords: Airborne, flapping wings, birds, soaring, vultures, weight, maintain flight, gliding, move downward, turbulence, primary wings.
Answer:
E.) None of the above
Explanation:
Draw a free body diagram. There are two forces acting on the car. Normal force perpendicular to the road, and weight downward.
Sum of the forces perpendicular to the road:
∑F = ma
N − mg cos θ = 0
N = mg cos θ
Sum of the forces towards the center of the circle:
∑F = ma
N sin θ = mv²/r
mg cos θ sin θ = mv²/r
g cos θ sin θ = v²/r
v = √(gr cos θ sin θ)
Given r = 50 m and θ = 5°:
v = √(9.8 m/s² × 50 m × cos 5° × sin 5°)
v = 6.52 m/s
v = 14.6 mph
when was slate found
a specific way of pursuing a scientific question that involves constructing a theory and then showing it is correct through experimentation
a specific way of pursuing a scientific question that involves the systematic formulation, observation, testing, and modification of a hypothesis
a specific way of pursuing a scientific question that involves performing an experiment and then constructing a hypothesis
The scientific method is a specific way of pursuing a scientific question that involves the systematic formulation, observation, testing, and modification of a hypothesis. Hence, option (C) is correct.
Since at least the 17th century, science has been developed using the scientific method, an empirical approach to information acquisition (with notable practitioners in previous centuries; see the article history of scientific method for additional detail.) Given that cognitive presumptions might skew how one understands the observation, it requires careful observation and the use of strong skepticism regarding what is observed.
It entails creating hypotheses through induction based on such observations, testing their testability through experimental analysis and measurement-based statistical testing of the conclusions drawn from the hypotheses, and then revising (or removing) the hypotheses in light of the experimental results. These are scientific method principles, as opposed to a predetermined set of processes that apply to all scientific endeavors.
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