The string of a simple pendulum is held in horizontal position and the bob is released. Find the acceleration of the bob when the string makes an angle theta with downward vertical. How to solve this?​

However, had it been a real sound, the sound's pitch would have been increased by the doppler effect, since the falcon was moving the source of the sound. perpendicular to away from towards at the same speed as

Automobile fuel efficiency is often measured in miles that the car can be driven per gallon of fuel (mpg). heavier cars tend to have lower fuel efficiencies (lower mpg ratings). which variable (weight or fuel efficiency) is most naturally considered the explanatory (predictor) variable in this context?

Which planet do you think would be easiest for humans to colonize some day?