Which property listed below is an intensive property?
(A) Internal energy
(B) Mass
(C) Density
(D) Enthalpy
(C) Density
Density does not depend on the amount of mass in a system.
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We know how fast a distant galaxy is moving away from us on the basis of its
A) mass. B) color. C) spectrum. D) age. E) luminosity.
The normal force that acts on a block of ice that slides on a ramp
A) is equal to mg at all angles. B) decreases as the slope of the ramp increases. C) becomes greatest when the ramp is vertical.
An alpha particle is another name for a(n)
a. electron. b. proton. c. neutron. d. helium nucleus. e. photon.
Which of the following conditions is never a boundary condition in fluid mechanics?
(A) The velocity is zero at a boundary (B) The normal component of velocity is zero in an inviscid flow at a boundary (C) The tangential component of velocity is zero in an inviscid flow at a boundary (D) The pressure is zero at a boundary