The Han Dynasty is best described as a:

City-state

Nation

Territory

Empire

In the water cycle, water vapor evaporates into the atmosphere and forms clouds through condensation. What happens in the atmosphere to the water in order for the clouds to form? A) Water drops mix with air pollution to form clouds.

Why don't we see solar and lunar eclipse every month?

A hot water heater is operated by using solar power. if the solar collector has an area of 5.3 m2, and the power delivered by sunlight is 995 w/m2, how long will it take to increase the temperature of 1 m3 of water from 20 ◦c to 65 ◦c?

How can an electron in an atom lose energy to go from a higher energy level to a lower energy level? select one: a. it exchanges gravitational potential energy for kinetic energy. b. it loses gravitational potential energy. c.

Carbon-14 has a half-life of 5730 years after how many half lives will 120 g of carbon-14 decay to 15 g A. One B. Two C. Three D. Four

Most volcanoes are located at? A. Convergent and Divergent Boundaries B. Midocean Ridges C. Transform Boundaries D. Hot Spots

For a copper-silver alloy of composition 51 wt% Ag-49 wt% Cu and at 775˚C (1425˚F) (see Animated Figure 9.7) do the following: (a) Determine the mass fractions of and phases. Mass fraction = [The tolerance is + / - 5.0%.

Discuss how gravity impacts how galaxies behave when they get close to one another

Taking the direction west to be positive, and east to be negative, what is the average acceleration of a jet ski that goes from rest to 10 m/s west in 4 seconds? A. 2.5 m/s2 B. 0.4 m/s2 C. - 0.4 m/s2 D. - 2.5 m/s2

One consequence of turbulence is mixing. Different layers of fluid flow cross over one another very easily, and get blended together.