Why are plate tectonics a theory?

Rewrite with only sin x and cos x. sin 3x a) 2 sin x cos2x + cos x b) 2 sin x cos2x + sin3x c) sin x cos2x - sin3x + cos3x d) 2 cos2x sin x + sin x - 2 sin3x

Under what condition is the instantaneous acceleration of a moving body equal to its average acceleration over time? A. only at positive accelerations B. only at negative accelerations C. only at zero acceleration D. only at constant accelerations

Radiation transfers thermal energy through -

A guitar string vibrates with a frequency of 320 Hz. If the wavelength of the vibration is 0.13 meters what is the speed of the wave

How many types of electrical charges exists

A database that is flexible and easy to use was recently installed. the data is stored in rows and columns much like a spreadsheet. what type of database must have been installed?

What did johannes kepler contribute to the study of planets

Baseboard heaters are basically electric resistance heaters and are frequently used in space heating. A homeowner claims that her 5-year-old baseboard heaters have a conversion efficiency of 100%.

Explain why the brakes of a car get much hotter than the brakes of a bicycle?

If 10,000 J of work was done to raise a 225 kg box, how high was the box raised?