During an adiabatic compression, a volume of air decreases to 1/4 its original size. Calculate its final pressure if its original pressure was 1 atm. (Assume the air behaves like an ideal gas with g = 1.4.)
a. 7.0 atm
b. 5.6 atm
c. 3.5 atm
d. 2.2 atm
e. 0.14 atm
A
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Six trillion miles is equivalent in distance to one ______________
Fill in the blank(s) with correct word
Democritus believed that everything that is real is made of atoms. Are electromagnetic fields physically real, and are they made of atoms?
A) Electromagnetic fields are made of atoms, but atoms themselves are not physically real and thus electromagnetic fields are not physically real. B) Electromagnetic fields are made of atoms, but are not physically real because they are nothing but the motions of these atoms. C) Electromagnetic fields are physically real, although they are not made of atoms. D) Yes, electromagnetic are physically real, and they are made of atoms. E) No, electromagnetic fields are not physically real, and they are not made of atoms.
You have a machine which can accelerate pucks on frictionless ice. Starting from rest, the puck travels a distance x in time t when force F is applied. If force 3F is applied, the distance the puck travels in time t is
A. x. B. (3/2)x. C. 3x. D. (9/2)x. E. 9x.
A proton having a speed of 3.0 × 106 m/s in a direction perpendicular to a uniform magnetic field moves in a circle of radius 0.20 m within the field. What is the magnitude of the magnetic field? (e = 1.60 × 10-19 C, mproton = 1.67 × 10-27 kg)
A) 0.080 T B) 0.16 T C) 0.24 T D) 0.32 T E) 0.36 T