B) 1950-1959
Sputnik I was launched on October 4, 1957
I don’t see a picture but unbalanced forces could be two boys pushing with a combined force of 400 Newton’s but the surface of what the box is laying on being 600 meaning since the ground is creating a higher force in the form of friction it will slow the boys down. When forces are unbalanced it means that the object can not be still or moving at a constant speed when one force is greater by a significant amount the object either slows quickly or accelerates fast depending on which factor is greater.
Molecular formula of water molecule is H₂O.
The answer is A) Electricity in homes spread extremely .....
