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

Physics & Space Science

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Three identical charges of 3.0 ?C are placed at the vertices of an equilateral triangle which measures 30 cm on a side. What is the magnitude of the electrostatic force which acts on any one of the charges?

A) 1.6 N B) 1.8 N C) 2.0 N D) 2.2 N E) 2.4 N

Physics & Space Science

If the mass of an object does not change, a constant net force on the object produces constant

A) velocity. B) acceleration. C) both of these D) none of the above

Physics & Space Science

A straight wire of length l is oriented east-west and is in a magnetic field B pointing north. The wire is moving downward at a constant speed v. Which end of the rod is positively charged?

a. neither b. the east end c. the west end d. both ends

Physics & Space Science

The quantity "pressure" expressed in terms of the fundamental quantities (mass, length, time) is equivalent to:

a. MLT-1. c. M2L-1T-3. b. ML-1T-2. d. a dimensionless quantity.

Physics & Space Science