5.00 kg of liquid water is heated to 100.0 °c in a closed system. at this temperature, the density of liquid water is 958 kg/m3. the pressure is maintained at atmospheric pressure of 1.01 × 105 pa. a moveable piston of negligible weight rests on the surface of the water. the water is then converted to steam by adding an additional amount of heat to the system. when all of the water is converted, the final volume of the steam is 8.50 m3. the latent heat of vaporization of water is 2.26 × 106 j/kg. how much heat is added to the system in the isothermal process of converting all of the water into steam?

Suppose you use a machine that gives you a mechanical advantage of 2 to achieve an output force of 30newtons what must the input force be

Agroup of students is studying convection currents. they fill two identical balloons with the same amount of helium. one balloon is placed in a freezer and the other in an area with warm air. after 10 minutes, the balloons are released from a height of 1 meter. which of the following do the students most likely observe? question 2 options: the balloons rise at the same rate. both balloons are the same size. the ballons both rise. the cold ballon is larger than the warm balloon. the cold balloon expands and rises. the warm balloon shrinks and sinks. the warm balloon expands and rises. the cold balloon shrinks and sinks.

Which accurately compares concave and convex lenses?