Infrared radiation causes your skin to tan
Indicate whether the statement is true or false
F
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Climate models which ignore human activity
A) completely fail to match real climate data B) match real climate data quite well C) match real climate data perfectly D) match real climate data, but only poorly
A 3.0-kg block slides on a rough horizontal surface. A force of 8.0 N acting parallel to the surface is applied to the block. The coefficient of kinetic friction between the block and the surface is 0.15 . What is the magnitude of the block's acceleration?
a. 1.9 m/s2 b. 1.2 m/s2 c. 2.3 m/s2 d. 1.5 m/s2 e. 2.9 m/s2
Work: A 30-N box is pulled upward 6.0 m along the surface of a ramp that rises at 37° above the horizontal. How much work does gravity do on the box during this process?
A. -1100 J B. -110 J C. -140 J D. -180 J E. 120 J
In Kepler's model of the Universe, what was the purpose of the five regular solids?
a. To differentiate the six planets b. To define the shape of each of the orbits c. To describe the internal shape of each planet d. To be spacers for the orbits of the six planets e. To support the calculations of each orbital period