Whay is difference between ac and dc

What are the forces acting on an airplain?

In the early 1980s, scientists found that the amount of heat energy produced by the sun decreased by 0.1 percent over a period of 18 months.

4. Heat is added to an ideal gas and the gas expands. In such a process the temperature

Properties of light that define light as a wave? Are the properties: Wavelength Amplitude Period Frequency Speed OR Reflection Refraction Dispersion Diffraction Interference

If air has dry bulb temperature of 2 and the wet bulb temperature of - 2. what is the relative humidity

Which of the following is true A) land heats less rapidly than water B) land heats more rapidly than water C) land reaches higher temperatures than water D) both b and c

What is the upper limit to the mass of a neutron star beyond which neutron degeneracy pressure is unable to withstand the force of gravity and the neutron star is crushed out of existence into a black hole?

What happened to the test charge when brought near another positive charge, and how did you use this fact to score a goal only using positive charges? Explain for both the practice charge and more difficult levels.

You get up in the morning, get dressed, eat breakfast, walk to the bus stop, and ride to school. List three different energy transformations that have taken place.

If you lived by the sea, what effect of the moon would you see? Describe the effect.