In a lab, the mass of object A is 52 kg. Object A weighs: 0.19 N 5.3 N 509.6 N cannot be determined

The volume of a gas is halved during an adiabatic compression that increases the pressure by a factor of 2.5. what is the specific heat ratio? show the math steps .

When you push downward on a book at rest on a table, you feel an upward force. does this force depend on friction? defend your answer.

The seven sisters, seven stars located more than 400 light-years away in the taurus constellation can be seen here with venus and another constellation, orion. the seven stars stay grouped together but seem to move, like the planet venus. why do stars seem to move like planets in the night sky?