A fisherman casts his bait toward the river at an angle of 25° above the horizontal
As the line unravels, he notices that the bait and hook reach a maximum height of What was the initial velocity he launched the bait with? Assume that the line exerts no appreciable drag force on the bait and hook and that air resistance is negligible. A) 18 m/s
B) 7.9 m/s
C) 7.6 m/s
D) 6.3 m/s
A
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Nanoscience has shown that
A) a chemical occurs with the use of a scanning probe microscope. B) the properties of a material can be different on the level of atoms then its properties when the material is analyzed in bulk. C) a physical change can occur when using a scanning probe microscope. D) DNA is the smallest molecule.
What distinguishes a huge block of ice from a glacier?
What will be an ideal response?
What is the most important reason why an icy moon is more likely to be geologically active than a rocky moon of the same size?
A) Ice is less rigid and has a lower melting point than rock. B) Ice is colder than rock. C) Ice contains more radioactive elements than rock. D) Ice is affected by tidal forces to a greater extent than rock. E) Ice is less dense than rock.
Radioactive Decay: Rutherfordium-261 has a half-life of 1.08 min. What is the decay constant of rutherfordium-261 in terms of seconds?
A. 0.0107 s-1 B. 0.0154 s-1 C. 1.87 s-1 D. 2.91 s-1 E. 0.344 s-1