A nanometer is
a. one thousandth of a meter.
b. one millionth of a meter.
c. one billionth of a meter.
d. one trillionth of a meter.
e. none of the above.
c
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A plane stress element on a bar in uniaxial stress has a tensile stress of ?? 5 78 MPa (see fig.). The maximum shear stress in the bar is approximately:
(A) 29 MPa
(B) 37 MPa
(C) 50 MPa
(D) 59 MPa
At t = 0, a particle is located at x = 25 m and has a velocity of 15 m/s in the positive x direction. The acceleration of the particle varies with time as shown in the diagram. What is the velocity of the particle at t = 5.0 s?
?
?
A. +15 m/s B. ?15 m/s C. +30 m/s D. 0 E. ?1.2 m/s
If the momentum of a ball is doubled, then the kinetic energy is
A. 0.5 times larger. B. 2 times larger. C. 3 times larger. D. 4 times larger. E. 5 times larger.
A wire loop of radius 0.250 m is placed in a uniform magnetic field of magnitude 0.740 T. The field is directed perpendicular to the plane of the loop. If the area of the loop increases at a rate of area 1.50 × 10^–3 m2/s, what is the magnitude of the emf induced in the coil?
a. 1.11 mV b. 3.00 mV c. 0.218 mV d. 0.589 mV