An object 9.0 m off the ground has 310 J of gravitational potential energy. How much gravitational potential energy does it have relative to the bottom of a hole 2.0 m deep? Group of answer choices

310 J

3.5 J

240 J

380 J

250 J

Determine the maximum r-value of the polar equation r =3+3 cos 0

Which of the following is the result of the nuclear weak force? the instability of large nuclei the repelling force between positively charged protons the structure of the atom certain types of nuclear decay

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.