During which decade were satellites first sent into orbit? 1940s 1950s 1960s 1970s

The second alternative is correct (B).

Satellites are equipment that, after being launched into space, remains in orbit around the Earth. These equipments have become fundamental to use technologies on Earth, such as mapping, communication and tracking.

The first satellite was put into orbit by the former Soviet Union in 1957. The Sputnik I had mass of approximately 83 kg and had no specific function, only transmitted a signal from a radio. The technology evolved, was launched by other countries and today there are specific satellites for television, meteorology, communication, etc.

answer; andrew jackson approved nullification by signing it into law,and john calhoun opposed it saying it was unconstitutional;

the correct answer is d

a conference committee is a group of congress representatives appointed by the senate and the house to reach an agreement over a bill that had different versions in each chamber. this is due to the fact that, to pass a law. both the house and the senate must agree on the exact same content and wording of the bill to present it to the president.