A cart of weight 15.0 N is accelerated across a level surface at 0.15 m/s2 . What net force acts on the wagon? (g = 9.8 m/s2)
a. 22 N
b. 0.23 N
c. 2.3 N
d. 10 N
e. 100 N
b
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0.0001776 can also be expressed as
A) 1.776 × 10-3. B) 1.776 × 10-4. C) 17.72 × 104. D) 1772 × 105. E) 177.2 × 107.
The net force that acts on a 100-N freely falling body is
1) zero, 2) 9.8 N, 3) 100 N, and its acceleration is 4) zero. 5) 9.8 m/s2. 6) 100 m/s2.
Following a series of experiments in which you are flung against walls to test the resiliency of the human body, you are ejected from the ship and find yourself in a maelstrom
Whipped by winds gusting at 10,000 km/hr, rising and falling in convective currents, you are not having a good time. On the rare occasions when you can assess your surroundings, you notice a horizon that seems to go on "forever" (or, at least, much farther than the horizon on Earth), and no solid surface anywhere. You get a glimpse of several large moons. The Sun races through your sky, requiring only about 5 hours to rise nearly due east, cross the meridian at an altitude of about 55° in the north, and then set due west.
Rising air expands and cools. The rate of cooling depends on
A) the air's moisture content. B) the dry adiabatic lapse rate. C) the energy of the water-vapor molecules. D) temperature inversions.