Refracting Telescope: The focal length of the objective lens of a telescope is 75.0 cm, and the eyepiece has a focal length of 6.00 cm. What is the magnification of this telescope?
A. 0.0800
B. 0.645
C. 450
D. 12.5
E. 200
Answer: D
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Suppose a car has a 100,000 mile 10 year warranty on the wheels and axles of a car. How may turns will the wheels of 0.80-m diameter make if both the mileage and time warranties run out simultaneously and what will be the average angular velocities of the wheel? Assume that a mile = m and that a year is s.
The difference between the pressures inside and outside a tire is called the absolute pressure
a. True b. False Indicate whether the statement is true or false
Consider the following reaction. n ? p + e– This reaction is impossible because it violates which conservation law?
a. baryon number b. lepton number c. strangeness d. charge
What is the preferred name for Mg3N2?
a. Magnesium trinitride b. Magnesium nitride c. Dimagnesium trinitride d. Manganese nitrate