Multiple planets have been identified around other stars via the transit technique
Indicate whether the statement is true or false
TRUE
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In which layer of Earth's atmosphere is ultraviolet light absorbed?
A) exosphere B) thermosphere C) stratosphere D) troposphere
Thermal Expansion: The coefficient of linear expansion of copper is 17 × 10-6 K-1 and that of steel is 12 × 10-6 K-1. At 12°C a steel rod has a diameter of 2.540 cm and a copper pipe has a diameter of 2.536 cm. If they are heated together to a higher temperature, which one of the following quantities is closest to the common temperature at which the steel rod will fit snugly in the copper pipe?
A. 310°C B. 330°C C. 340°C D. 350°C E. 380°C
Consider a two-component complex vector 
where a and b are real numbers. Which of the following vectors are orthogonal to this vector?
A. 
B. 
C. 
D. 
E. 
F.C and D
T. None of the above.
The Earth's circumference was first determined by:
A) Aristotle using lunar eclipses. B) Pythagoras with geometry. C) Hipparchus with stellar parallaxes. D) Erastothenes with solstice shadows. E) Aristarchus with first and third quarter Moon timings.