In this experiment, what is the maximum possible error in degrees that could be made in deter mining the Moon's altitude by assuming the Moon traveled in the same plane as the ecliptic?
The maximum possible error would be plus or minus 5°.
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A toaster is rated at 800 W when operating at 120 V dc. What is the resistance of its heating element?
A) 16 ? B) 18 ? C) 6.7 ? D) 0.15 ?
Each of the following lists two facts. Which pair of facts can be used with Newton's version of Kepler's third law to determine the mass of the Sun?
A) Earth is 150 million km from the Sun and orbits the Sun in one year. B) Mercury is 0.387 AU from the Sun and Earth is 1 AU from the Sun. C) The mass of Earth is 6 × 1024 kg and Earth orbits the Sun in one year. D) Earth rotates in one day and orbits the Sun in one year.
The Hubble Space Telescope
a. has a flawed primary mirror b. has been repaired c. has failed d. none of the above
Power: A certain ac signal at 1000 Hz is applied across an inductor and a 100-? resistor. If the power factor of the circuit is 0.400, what is the impedance of this circuit?
A. 150 ? B. 200 ? C. 250 ? D. 100 ? E. 300 ?