When does the new Moon phase occur?
A. when Earth is between the Sun and the Moon
B. when the Moon is between Earth and the Sun
C. when the Sun is between Earth and the Moon
D. when the Sun and the Moon are on the Celestial Equator
Answer: B
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A mercury-in-glass thermometer reads 20ºC when hanging outside in the shade on a calm summer day. Another thermometer hangs in a sunny location and registers 45ºC. Assuming a convective heat transfer coefficient of 10 W/m^2? K and the emissivity is 0.2 for both thermometers, determine the effective surrounding surface temperature in the sun.
What will be an ideal response?
Resistance and Resistivity: A certain metal has a resistivity of 1.68 × 10-8 ? ? m. You have a long spool of wire made from this metal. If this wire has a diameter of 0.15 mm, how long should you cut a segment so its resistance will be 15 ??
A. 16 mm B. 16 cm C. 1.6 m D. 16 m
The relative size of the mantle of Earth compared to the solid inner core of Earth is most similar to
A) the peel of an orange as compared to the meat of the orange. B) the rind of a watermelon as compared to the meat of the watermelon. C) the skin of a grape as compared to the meat of the grape. D) the meat of a peach as compared to the pit of the peach. E) the meat of a cherry as compared to the pit of the cherry.
An accelerating frame of reference cannot be distinguished from a gravitational field
Indicate whether the statement is true or false