Equilibrium: A 10-m uniform beam weighing 100 N is supported horizontally by two vertical ropes at its ends. If a 400-N person sits at a point 2.0 m from the left end of the beam, what is the tension in each rope?
What will be an ideal response?
370 N (left rope), 130 N (right rope)
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Early human culture, involving villages and a sense of history, could best be described as a(n)
A) industrial culture. B) migratory culture. C) hunting culture. D) scientific culture. E) agri-culture.
A bobsled makes a run down an ice track starting at 250 m vertical distance up the hill. If there is no friction, what is the velocity at the bottom of the hill?
a. 35.0 m/s b. 49.5 m/s c. 46.7 m/s d. 70.0 m/s e. 58.3 m/s
The strong nuclear force is how many times as strong as the gravitation force?
A) 1038 B) 1 (They are the same.) C) 2 D) 100 E) 106
Rutherford's experiments involving the use of alpha particle beams directed onto thin metal foils demonstrated the existence of which of the following?
a. proton c. nucleus b. neutron d. positron