Author Question: An object is dropped from a vertical distance of 25.5 m above the ground, and it takes 2.28 sec to ... (Read 140 times)

jrubin · **on:** Jul 28, 2018

An object is dropped from a vertical distance of 25.5 m above the ground, and it takes 2.28 sec to fall that distance. A second identical object to launched from the same height, with a horizontal velocity of 45.9 m/s. How long does the second object take to fall the 25.5 m?
a. More than 2.28 sec
b. Almost 2.28 sec.
c. Less than 2.28 sec
d. Exactly 2.28 sec
e. Much less than 2.28 sec

Question 2

Which type of reaction is 2Cu(NO3)2 2CuO + 4NO2 + O2?
a. Single-replacement
b. Double-replacement
c. Combination
d. Decomposition