The First Crusade was highly successful, while the Second was not is correct .
Answer:
a=v/t
Explanation:
Acceleration (a) is the change in velocity (Δv) over the change in time (Δt), represented by the equation a = Δv/Δt. This allows you to measure how fast velocity changes in meters per second squared (m/s^2).
Answer: Unions in the 1920s were harmed by rising wages which made it harder to attract new members.
Explanation: Give me the brainiest