Which of the following best describes Anton van Leeuwenhoek?
A: The inventor of bacteria
B: Discovered bacteria on the body
C: First person to see a virus under a microscope
D: First person to see bacteria under a microscope

How is the gravitational force related to the distance between two objects?

Which word expression describes how much to calculate pressure

Two kilograms of air within a piston–cylinder assembly executes a carnot power cycle with maximum and minimum temperatures of 800 k and 300 k, respectively. the heat transfer to the air during the isothermal expansion is 60 kj. at the end of the isothermal expansion the volume is 0.4 m3. assume the ideal gas model for the air. determine the thermal efficiency, the volume at the beginning of the isothermal expansion, in m3, and the work during the adiabatic expansion, in kj.