An applied force of 210 N pulls a 30-kg object to the right. The object also is affected by a 180 N frictional force. What is the object's rate of acceleration

the only real purpose of sputnik 1 was to beat the us into space. we were getting close to launching a useful satellite, explorer 1 - which launched on january 31, 1958. the ussr had to beat that, so they launched sputnik 1 on october 4, 19

causes

fossil fuels burn

cities become more industrialized

human population grows worldwide

blue light is scattered in different directions by the tiny molecules of air. blue is scattered more than other colours because it has a shorter distance to travel which results in smaller waves. this is why we see a blue sky most of the time.