The pressure inside a commercial airliner is maintained at 1 ATM (1.01 × 10^5 N/m2). What is the outward force exerted on a 1.0 m × 2.0 m cabin door if the outside pressure (at 10 km height) is 0.3 ATM?
a. 1.4 × 10^2 N
b. 1.4 × 10^3 N
c. 1.4 × 10^4 N
d. 1.4 × 10^5 N
e. 7.0 × 10^3 N
D
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The horizontal surface on which the objects slide is frictionless. If F = 12 N, what is the tension in string 1?
a.
35 N
b.
30 N
c.
40 N
d.
45 N
e.
25 N
A He-Ne laser, which produces light of wavelength 632.8 nm, is used to calibrate a diffraction grating. If the first-order maximum occurs at 20.5° from the central spot, what is the distance between the slits of the grating?
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