An airplane passenger has 100 cm3 of air in his stomach just before the plane takes off from a sea level airport. What volume (in cm3) will the air have at cruising altitude if cabin pressure is 7.50 ✕ 104 N/m2 , assuming that the temperature does not change?

Aprotein molecule in an electrophoresis gel has a negative charge. the exact charge depends on the ph of the solution, but 30 excess electrons is typical. what is the magnitude of the electric force on a protein with this charge in a 1600n/c electric field? write in two significant numbers, and also in newton