A Boeing 737 airliner has a mass of 20,000 kg and the total area of both wings (top or bottom) is 100 m2. What is the pressure difference between the top and bottom surface of each wing when the airplane is in flight at a constant altitude?
A. 1960 N/m2
B. 3920 N/m2
C. 7840 N/m2
D. 4560 N/m2
E. 3070 N/m2
Answer: A
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A plastic block of dimensions 2.00 cm × 3.00 cm × 4.00 cm has a mass of 30.0 g. What is its density?
A) 0.80 g/cm3 B) 1.20 g/cm3 C) 1.25 g/cm3 D) 1.60 g/cm3
Light of wavelength 521 nm is incident on a target metal that has a work function of 1.6 eV. What stopping potential is required for this combination in a phototube? (h = 6.63 × 10^?34 J?s, c = 3.00 × 10^8 m/s, 1 eV = 1.60 × 10^?19 J, and 1 nm = 10?9 m)
a. 4.0 V b. 0.8 V c. 2.0 V d. 0.4 V e. 2.4 V
How large a pressure increase (in ATM) must be applied to water if it is to be compressed in volume by 1.0%? The bulk modulus of water is 2.0 × 10^9 N/m2 and 1 ATM = 1.0 × 10^5 N/m2
a. 50 ATM b. 100 ATM c. 1 100 ATM d. 400 ATM e. 200 ATM
A light-year (ly) is the distance that light travels in one year. The speed of light is 3.00 × 108 m/s. How many miles are there in 1.00 ly? (1.00 mi = 1.609 km and one year is 365.25 days.)
A) 2.87 × 1013 mi B) 9.46 × 1015 mi C) 5.88 × 1015 mi D) 9.46 × 1012 mi E) 5.88 × 1012 mi