Some compounds, like carbon dioxide, are gaseous at room temperature, while others are solid at room temperature. why is this?
a) there are weak intermolecular forces at work in gases, strong in solids.
b) there are weak intermolecular forces at work in solids, strong in gases.
c) the intermolecular force of attraction between gaseous molecules is repulsive in nature.
d) the intermolecular forces of a gas to set up a three-dimensional network structure.

The graph describes the motion of an object. the object moves with from a to b. it from b to c. it moves with from c to d.

Two technicians are discussing a resistance measurement between the can-h and can-l wires. technician a says this measurement should be done with the ignition switch in the "run" position. technician b states that a measurement of 0 ohms indicates an open in the network. which technician is correct?

Arunner is jogging at a steady 3.6 km/hr. when the runner is 2.9 km from the finish line, a bird begins flying from the runner to the finish line at 14.4 km/hr (4 times as fast as the runner). when the bird reaches the finish line, it turns around and flies back to the runner. even though the bird is a dodo, we will assume that it occupies only one point in space, i. e., a zero-length bird. how far does the bird travel? (b) after this first encounter, the bird then turns around and flies from the runner back to the finish line, turns around again and flies back to the runner. the bird repeats the back and forth trips until the runner reaches the finish line. how far does the bird travel from the beginning? (i. e. include the distance traveled to the first encounter)