What was gunpowder initially used for in china during the middle ages?
a) measuring time
b) creating fireworks
c) conducting trade
d) recording texts
e) traveling overseas

After the success of the sputnik launch, the united states feared that they would never be able to launch their own satellite, the ussr had used technology developed by the united states, the soviets had superior nuclear capabilities, that any future us satellites would not be as successful.