An object moves with a constant speed of 30 m/s on a circular track of radius 150 m. What is the acceleration of the object?
A) 0 m/s2
B) 0.17 m/s2
C) 5.0 m/s2
D) 6.0 m/s2
D
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If the answer to your calculation has units of kg ? m2/s, what type of quantity could it be? (There could be more than one correct choice)
A) angular momentum B) power C) work D) force E) linear momentum F) torque G) rotational kinetic energy H) moment of inertia
In the color wheel shown below, which colors are the secondary colors?
A. red, yellow, blue B. orange, green, purple C. green, blue, purple D. yellow, orange, red
The ground state of the Li++ ion is at (Li has atomic number 3)
A) -40.8 eV. B) -122 eV. C) Li++ does not have a ground state. D) -61 eV. E) -1.51 eV.
One of two identical twins becomes an astronaut, while the other becomes a real estate broker. The astronaut embarks on high-speed space travel and is gone for several years. Upon the astronaut's return, the two twins reunite and compare their physical appearances. The result will be that
A. both have aged the same. B. the real estate broker has aged less. C. the astronaut has aged less.