Why is an umbrella in danger of being turned inside out on a windy day?
What will be an ideal response?
Answer: Because of the umbrella's curvature, air passes faster over its top than across its bottom. This produces a difference in forces, and like an airplane wing, experiences lift. This is in accord with Bernoulli's principle. The lift can turn or flip the umbrella inside out.
You might also like to view...
About how hot was the Big Bang when matter and energy "decoupled"?
A) 900 million K B) 15 million K C) 3,000 K D) 300 K E) 2.73 K
The age dating of the solar system is done by radioactive dating of ________
Fill in the blank(s) with correct word
A hydrogen atom initially in the n = 6 state decays to the n = 2 state. The emitted photon is detected in a photographic plate. What is the wavelength of the detected photon?
The lowest level energy state of hydrogen is -13.6 eV. (h = 6.626 × 10-34 J ? s, 1 eV = 1.60 × 10-19 J, c = 3.00 × 108 m/s) A) 1090 nm B) 93.1 nm C) 410 nm D) 93.8 nm
The name of the transuranium element commonly used in smoke detectors is ______________
Fill in the blank(s) with correct word