Given that 1.00 in. = 2.54 cm and 1.00 yd = 36.0 in., how many meters are in 7.00 yd?
A) 6.40 m
B) 36.3 m
C) 640 m
D) 1.78 × 103 m
A
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A dispersion-strengthened cutting tool will be made of a 80 vol % commercial purity nickel matrix and 20 vol % synthetic diamond. Nickel has an elastic modulus, given in Table 6.1, of 200 GPa and a tensile fracture strength of 400 MPa, and synthetic diamond has an elastic modulus of 900 GPa and a tensile fracture strength of 1000 MPa. Estimate the tensile strength and elastic modulus of this alloy.
What will be an ideal response?
Radiation Activity: The half-life of radioactive iodine-137 is 8.0 days. How many iodine nuclei are necessary to produce an activity of 1.0 ?Ci? (1 Ci = 3.70 × 1010 Bq)
A. 2.9 × 109 B. 4.6 × 109 C. 3.7 × 1010 D. 7.6 × 1012
Light having a speed in vacuum of 3.0 × 108 m/s enters a liquid of refractive index 2.0. In this liquid, its speed will be
A) 6.0 × 108 m/s. B) 3.0 × 108 m/s. C) 1.5 × 108 m/s. D) 0.75 × 108 m/s. E) 0.67 × 108 m/s.
Two bodies, A and B, collide as shown in Figures I and II below
Which statement is true?
a.
They exert equal and opposite forces on each other in I but not in II.
b.
They exert equal and opposite force on each other in II but not in I.
c.
They exert equal and opposite force on each other in both I and II.
d.
The forces are equal and opposite to each other in I, but only the components of the forces parallel to the velocities are equal in II.
e.
The forces are equal and opposite in I, but only the components of the forces perpendicular to the velocities are equal in II