What is the frequency of a wave that has a wavelength of 4 meters and a speed of 40 m/s?
a. 36 hz
b. 44 hz
c.10 hz
d.160 hz

What was the main aim of the northwest ordinance of 1787

Which of the following is not true about hydroelectricity a. use of gravitational force of flowing water b. its the most widely used renewable energy c. it has a high output of co2 that fossil fuels d. it has no direct waste asap

A) briefly explain why one of the following best supports the view that slavery largely ended during the civil war before the passage of the 13th amendment. - president lincoln - u. s. congress - enslaved african americans b) contrast your choice against one of the other options, demonstrating why that option in not as good as your choice. c) briefly describe what role, if any, slaves played in the war.