A wheel rotates about a fixed axis with a constant angular acceleration of 4.0 rad/s2 . The diameter of the wheel is 40 cm. What is the linear speed of a point on the rim of this wheel at an instant when that point has a total linear acceleration with a magnitude of 1.2 m/s2?
a. 39 cm/s
b. 42 cm/s
c. 45 cm/s
d. 35 cm/s
e. 53 cm/s
b
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In which of the following ways are Pluto and Eris more like comets than like any of the terrestrial or jovian planets?
A) They are made mostly of rock and ice. B) They sometimes enter the inner solar system. C) They have long tails. D) They have thick atmospheres.
When a certain constant-volume gas thermometer is in thermal contact with water at its triple point (273.16 K) the pressure is 6.30 × 104 Pa. For this thermometer a kelvin corresponds to a change in pressure of about:
A. 4.34 × 102 Pa B. 2.31 × 102 Pa C. 1.72 × 103 Pa D. 2.31 × 103 Pa E. 1.72 × 107 Pa
Where do mountains like the Himalayas come from?
A. The Earth is made of molten rock and metals, and regions with opposite electrical charges attract each other and form peaks. B. The Earth formed by an irregular processes and that is just the way that it was shaped when the molten rock cooled into place. C. The Moon's gravity pulls some layers up into mountain ranges. D. In some locations, plates of rock on the planet's surface press together and the plates rise together. E. Rain of debris from meteorites and comets falls in some places more than others, and builds up into mountains.
Drag within the solar nebula is responsible for hot Jupiters
Indicate whether the statement is true or false