A pulley is used to raise a heavy crate. With the pulley it only takes an effort force of 223 N to provide a resistance force of 1784 N. What is the mechanical advantage of this pulley?

Suppose that recording station n is located 200 km north of the epicenter of an earthquake, and recording station s is located 100 km south of the epicenter of the same earthquake. which of the following statements would be true?

Wavelength,frequency,and energy are related.what happens to a wave as it’s wavelength gets shorter?

Iwill give 30 points to whoever answers ! what is the formula for actual mechanical advantage and ideal mechanical advantage?