If all the components of a vector are equal to 1, then that vector is a unit vector

A) True
B) False


B

Physics & Space Science

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A copper tube with wall thickness of 8 mm must carry an axial ten-sile force of 175 kN. The allowable tensile stress is 90 MPa. The minimum required outer diameter is approximately:


(A) 60 mm
(B) 72 mm
(C) 85 mm
(D) 93 mm

Physics & Space Science

How many joules of energy are required to accelerate one kilogram of mass from rest to a velocity of 0.886c?

A) 1.8 × 1017 J B) 9.0 × 1016 J C) 3.0 × 103 J D) 8.1 × 1021 E) 3.4 × 10-7

Physics & Space Science

What is the mass number of alpha particles?

A) 1 B) 2 C) 3 D) 4 E) 6

Physics & Space Science

Earth's radius is 6.38 × 106 m, and it completes one revolution every day. What is the magnitude of the centripetal acceleration of a person standing on the equator?

A) 0.00844 m/s2 B) 0.00343 m/s2 C) 0.0337 m/s2 D) 0.343 m/s2 E) 0.000854 m/s2

Physics & Space Science