Consider a point on a bicycle wheel as the wheel turns about a fixed axis, neither speeding up nor slowing down. Compare the linear and angular velocities of the point
a. Both are constant.
c. Only the linear velocity is constant.
b. Only the angular velocity is constant.
d. Neither is constant.
B
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In the context of the Sun's surface, which of the following is the source of most of the sunlight received by Earth?
A) The corona B) The chromosphere C) The convection zone D) The photosphere
If I1 goes to the right through R1, I2 goes to the right through R2, and I3 goes to the right through R3, what is the resulting equation resulting from applying Kirchhoff's junction rule at point b?
Perigee is the point in ____
a. the Moon's orbit when the Moon is farthest from Earth b. an object's orbit around Earth when the object is closest to Earth c. an object's orbit around Earth when the object is closest to the Sun d. a planet's orbit when the planet is closest to its sun e. a planet's orbit when the planet is farthest from its sun
In another solar system, a planet has an airless moon Zygo that is 4.0 × 105 m in diameter
Experiments reveal that a freely falling object at the surface of Zygo accelerates at 0.20 m/s2. What is the mass of Zygo? (G = 6.67 × 10-11 N ? m2/kg2) A) 2.4 × 1019 kg B) 4.8 × 1019 kg C) 1.2 × 1020 kg D) 2.4 × 1020 kg E) 4.8 × 1020 kg