The element rubidium (Rb, atomic number 37) is in Group IA of the periodic table, thus the chemical bonding should be ______________.
Fill in the blank(s) with the appropriate word(s).
metallic
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A uniform rod (length = 2.0 m) is mounted to rotate freely about a horizontal axis that is perpendicular to the rod and that passes through the rod at a point 0.50 m from one end of the rod. If the rod is released from rest in a horizontal position, what is the angular speed of the rod as it rotates through its lowest position?
a. 3.5 rad/s b. 3.8 rad/s c. 4.1 rad/s d. 2.0 rad/s e. 5.6 rad/s
In lifting an object, work is done against ______________
Fill in the blank(s) with correct word
A child on a sled starts from rest at the top of a 15° slope. If the trip to the bottom takes how long is the slope? Assume that frictional forces may be neglected
A) 293 m B) 586 m C) 1130 m D) 147 m
The density of a _________ is greater than the density of a _________
a. white dwarf; neutron star b. neutron star; black hole c. pulsar; neutron star d. pulsar; white dwarf e. white dwarf; black hole