The cabin pressure of a passenger jet cruising at high altitude (30,000 ft) is about 1 atm. and the pressure outside is about 0.3 atm. What is the outward force acting on a door measuring 1 meter by 2 meters? (Hint: convert metric to English units in this problem using the conversion factor m2 to ft2 in the Table of Conversion Factors)
32,037.1 lb
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A flat circular coil having 57 turns of very thin wire has a diameter of 9.5 cm and carries 7.2 A of current. (?0 = 4? × 10-7 T ? m/
A) (a) What is the strength of the magnetic field at the center of the coil? (b) If the same length of wire were used to make a coil with twice the original diameter, how large would the magnetic field at the center be when it carried the same current as before?
What resistance must be connected in parallel with a 633-? resistor to produce an equivalent resistance of 205 ??
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A decade ago, many astrophysicists thought that the oldest globular clusters were 14-16 billion years old. Why did this create problems, and how did new Hubble and Hipparcos data resolve them?
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On the moon, the maria are younger than the highlands
Indicate whether the statement is true or false