Consider a plane flying with groundspeed Vg and airspeed Va in a wind with velocity V. Which of the following relationships is true?
A) Vg = Va + V
B) Vg can be less than Va + V
C) Vg can be greater than Va + V
D) Vg can have any value between Va + V and Va - V
E) Vg = Va - V
D
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The Bohr model pictures a hydrogen atom in its ground state as a proton and an electron separated by the distance a0 = 0.529 × 10?10 m. The electric potential created by the electron at the position of the proton is
A. ?13.6 V. B. +13.6 V. C. ?27.2 V. D. +27.2 V. E. +5.12 × 109 V.
An antinode in a standing wave is the location that appears to ________ (describe behavior) from equilibrium.
What will be an ideal response?
Thermal Expansion: The density of water at 0°C is 999.84 kg/m3 and at 4°C it is 999.96 kg/m3. A 1.0-L container, full to the brim with water at 4.0°C is placed in the refrigerator. By the time that the temperature of the water reaches 0.0°C, what volume of water has spilled from the container, assuming that the contraction of the container is negligible?
A. 1.1 × 10-7 m3 B. 1.2 × 10-7 m3 C. 1.3 × 10-7 m3 D. 1.4 × 10-7 m3 E. 1.5 × 10-7 m3
What is a galaxy's rotation curve? To which galaxies is it best applied, and what does it tell us about the distribution of dark matter?
What will be an ideal response?