What does a waxing gibbous moon mean?
a. The changing Moon between full moon and third quarter
b. The changing Moon between third quarter and new moon
c. The changing Moon between first quarter and full moon
d. The changing Moon between new moon and first quarter
e. The changing Moon between first and third quarters
c
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A potter's wheel, with rotational inertia 46 kg ? m2, is spinning freely at 40 rpm. The potter drops a lump of clay onto the wheel, where it sticks a distance 1.2 m from the rotational axis
If the subsequent angular speed of the wheel and clay is 32 rpm what is the mass of the clay? A) 8.0 kg B) 5.4 kg C) 7.0 kg D) 8.8 kg
A wheel (radius = 12 cm) is mounted on a frictionless, horizontal axle that is perpendicular to the wheel and passes through the center of mass of the wheel. A light cord wrapped around the wheel supports a 0.40-kg object. If released from rest with the string taut, the object is observed to fall with a downward acceleration of 3.0 m/s2. What is the rotational inertia (of the wheel) about the given axle?
A. 0.023 kg?m2 B. 0.013 kg?m2 C. 0.020 kg?m2 D. 0.016 kg?m2 E. 0.035 kg?m2
Radioactive by-products mostly occur when atomic nuclei
1) break apart, 2) combine together, and radioactive by-products are a chief result of atomic nuclei 3) breaking apart. 4) combining together. 5) doing neither.
A Carnot heat engine could have an efficiency of 100% only if the temperature of the exhaust were at ________.
What will be an ideal response?