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# The temperature of an object is raised by 90 o C . This is equivalent to what increase in its absolute temperature?

1. The temperature of an object is raised by 90oC. This is equivalent to what increase in its absolute temperature?
2. A supersonic aircraft produces a shock wave that describes a 30o angle. What happens to the angle of the cone as the aircraft travels faster?
3. A 2.0-ohm resistor is connected in a series with a 20.0 -V battery and a three-branch parallel network with branches whose resistance are 8.0 ohms each. Ignoring the battery's internal resistance, what is the current in the batter? Show your work.
4. Gas A is composed of diatomic molecules (two atoms to a molecule) of a pure element. Gas B is composed of monoatomic molecules (one atom to a molecule) of another pure element. Gas A has three times the mass of an equal volume of gas B at the same temperature and pressure. How do the atomic masses of elements A and B compare?
5. Consider a model steel bridge that is 1/100 the exact scale of the real bridge that is to be built.
6. If the model bridge weighs 50 N, what will the real bridge weigh?
7. If the model bridge does not appear to sag under its own weight, is this evidence the real bridge, built exactly to scale, will not appear to sag either?

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