Question

In the freefall lab; given an equation ofy = 4ft./s +32x; where x is in seconds. What does the 32 mean? What is its units? If the water level is 49 cm for the 2nd harmonic when a 240HZ tuning fork is sounded; what is the speed of sound? For a current of 250 milliamps of current through a 6.8 k0 of resistor, and a 20V source; how much energy is generated in 20 minutes? If this energy goes into 20 grams of water; what is the change in Temperature (c4.186J/g°C)?

Answer 1

(1) y = 4 ft/s + 32x;

compare with equation of kinematics

v = u + ax; where x = time in sec

acceleration due to gravity a = 32 ft/s²