Answer:
the telephone was an exciting invention as it revolutionised communication and people across the country were connected for the first time, however people were concerned there would be negative consequences.
Answer:
insulator's also known as non metals
Explanation:
plastic , wood , rubber are insulator's and they don't let electricity flow thru them.
1. Valid. The statement shows that if rock comes from Venus, it doesn't contain silicon. Rocks came either Mars or Venus. SO when rock contains silicon, it came from Mars not Venus.
(If Venus, then NOT silicon)
(Venus OR Mars)
(Silicon)
(Mars; Valid)
2. Invalid. It is not true that people with happiness must have a lot of money. The first premise is a false premise. Secondly, it is not true that people earn a lot of money with hard working. The second premise is also a false premise. Therefore this is an invalid statement.
Hope this help you
teens drive to jobs and contribute to the national economy
