A plane has an airspeed of 200 m/s northward, and is in a wind of 50.0 m/s to the west. The plane's speed relative to the ground is
A) 200 m/s. B) 150 m/s. C) 250 m/s. D) 206 m/s.
D
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The electric field in a region of space is given by Ex = (3.0x) N/C, Ey = Ez = 0, where x is in m. Points A and B are on the x axis at xA = 3.0 m and xB = 5.0 m. Determine the potential difference VB ? VA
a. ?24 V b. +24 V c. ?18 V d. +30 V e. ?6.0 V
The central regions of Earth's core are solid because
a. the composition at the center of the core is lower in iron. b. the pressure at the center raises the melting point. c. the magnetic field cannot penetrate into the center of the core. d. convection does not extend all the way to the center of the core. e. Earth initially formed from solid particles in the solar nebula.
Alumina (Al2O3) is a(n) ______________material.
Fill in the blank(s) with the appropriate word(s).
The lowest point in the potential energy curve on an energy diagram is
A. The turning point B. Point of smallest total energy C. Point of largest total energy D. Point of largest velocity