The diagram shows the field lines near the poles, x and y
of two magnets
based on the field lines, what are the poles of the
magnets?
x: north
y: south
x: south
y: north
x: north
y: north
x: south
y: south

Asystem containing an ideal gas at a constant pressure of 1.22×10^5 pa gains 2140 j of heat. during the process, the internal energy of the system increases by 2320 j. what is the change in volume of the gas?

For which pair of objects would adding the same a

The sun’s mass is 2.0×10^ 30 kg, its radius is 7.0×10 5 km, and it has a rotational period of approximately 28 days. if the sun should collapse into a white dwarf of radius 3.5×10 3 km, what would its period be if no mass were ejected and a sphere of uniform density can model the sun both before and after?