Physics Force & Laws Of Motion Level: Misc Level
On the basis of conservation of angular momentum, discuss why a helicopter have more then one rotor ( or propeller). Discuss two or more ways in which the second rotor (or propeller) can operate in order to keep the body of the helicopter stable.
Physics Gravitation Level: Misc Level
Stars originate as large bodies of slowly rotating gas. Because of gravity, these clumps of gas slowly decrease in size. What happens to the angular velocity of a star as it shrinks?Explain.
Physics Circular Motion Level: Misc Level
A bug slowly moves radically outward on a spinning 45 rpm record. How do its angular speed and tangential speed change as it moves to larger radii?
Physics Force & Laws Of Motion Level: Misc Level
In a collusion between two cars, which would you expect to be more dangerous to the occupants: if the cars collide and remain together or if the two cars rebound backwards from each other elastically?
Physics Force & Laws Of Motion Level: Misc Level
A box slides across the frictionless surface of a frozen lake. What happes to the speed of the box as water collects in it from the rain shower?
Physics Work,Power & Energy Level: Misc Level
In common speech, we often use the words energy and power interchangeably as if they were synonyms. However, in physics, they have distinctly different definitions and are not synonymous. Explain the difference between these terms as they are used in physics.
Physics Work,Power & Energy Level: Misc Level
If you push vigorously against a brick wall, how much work do you do on the wall? Explain.
Physics Force & Laws Of Motion Level: Misc Level
A certain horse says, There s no use in trying to pull that cart. No matter how hard I pull on the cart, it will always pull back on me with exactly the same force. So I can never make it go Explain what is wrong with the horse s reasoning. ( Use free freebody diagrams, showing all the forces involved)I
Physics Force & Laws Of Motion Level: Misc Level
If an object is at rest, can we conclude that there are no external forces acting on it? Explain.
Physics Vectors Level: Misc Level
Vector A has a magnitude of 25 units and vector B has a magnitude of 15 units. What is the minimum and maximum magnitude of a vector A +B ?
Physics Force & Laws Of Motion Level: Misc Level
Does a negative acceleration necessarily imply that a body is slowing down? What (or who ) determines the sign of the acceleration in a particular problem?
Physics Measurements Level: Misc Level
By definition, I inch precisely equals 2.5400 centimeters. A length is measured to be 3.2 feet, and after conversion to centimeters this length is reported to be 97.54 centimeters.Explain what is wrong with this conclusion.
Mathematics Algebra Level: Misc Level
solve the problem ( x ^ 4 - 64 )divided by ( x^2 -8 )
Mathematics Algebra Level: Misc Level
use synthetic division to determine the quotient and remainder,
(- 4 x^ 3 - 24 x^ 2 - 19 x + 5 ) divided by ( x + 5 )
Physics Misc Topic Level: Misc Level
An ideal gas occupies a volume of 1.0 cm cubed at 20 degrees c and atmospheric pressure. Determin the number of molecules of gas in the container (b) if the pressure of the 1 cm cubed volume is reduced to 1.0 x10 to the -11 Pa, while the tempurature remains constant, how many moles of gas remain in the container?
