A 10-kg object is hanging by a very light wire in an elevator that is traveling upward. The force that the wire exerts on the object is measured to be 75 N. What are the magnitude and direction of the acceleration of the elevator?
What will be an ideal response?
2.3m/s2, downward
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A skier leaves a ski jump with a horizontal velocity of 29.4 m/s. The instant before she lands three seconds later, the magnitudes of the horizontal and vertical components of her velocity are:
a. 0; 29.4 m/s. b. 29.4 m/s; 0. c. 29.4 m/s; 29.4 m/s. d. 29.4 m/s; 41.6 m/s. e. 41.6 m/s; 41.6 m/s.
Determine the stability criterion for an explicit solution of three-dimensional transient conduction in a rectangular geometry.
GIVEN - Three-dimensional transient conduction in a rectangular geometry FIND (a) The stability criterion for an explicit situation
Ideal Gas Law: How many molecules are in (a) 1.0 cm3 of air at STP and (b) 1.0 cm3 of helium at STP? (R = 8.31 J/mol . K, NA = 6.022 × 1023 molecules/mol)
What will be an ideal response?
A double-convex thin lens has radii of curvature of magnitude 46 cm, and it is made of glass of index of refraction 1.60. What is the focal length of this lens?
A) infinite B) -30 cm C) 18 cm D) 38 cm E) -19 cm