It is possible that there are moons within habitable zones that have habitable surfaces in other solar systems
Indicate whether the statement is true or false
TRUE
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Resistance and Resistivity: You are given a copper bar of dimensions 3 cm × 5 cm × 8 cm and asked to attach leads to it in order to make a resistor. If you want to achieve the smallest possible resistance, you should attach the leads to the opposite faces that measure
A. 3 cm × 5 cm. B. 3 cm × 8 cm. C. 5 cm × 8 cm. D. Any pair of faces produces the same resistance.
The acceleration of gravity on Earth's surface is 9.8 m/s2. What is the acceleration of gravity at a height of 6,400 km above Earth's surface? (Hint: recall the 1/r2 dependence and note that Earth's radius is 6,400 km.)
A. 19.6 m/s2 B. 2.45 m/s2 C. 9.8 m/s2 D. 4.9 m/s2
When a 20.0-ohm resistor is connected across the terminals of a 12.0-V battery, the voltage across the terminals of the battery falls by 0.300 V. What is the internal resistance of this battery?
A) 3.60 ? B) 1.56 ? C) 0.98 ? D) 0.30 ? E) 0.51 ?
Why are brown dwarfs easier to spot in a young, star forming region like Orion rather than an old group of stars like a globular cluster?
What will be an ideal response?