Air within the funnel of a large tornado may have a pressure of only 0.2 ATM. What is the approximate outward force on a (5 m × 10^ m) wall if a tornado suddenly envelops the house? (1 ATM = 1.01 × 10^5 N/m2.)
a. 4 × 10^3 N
b. 4 × 10^4 N
c. 4 × 10^5 N
d. 4 × 10^6 N
e. 7 × 10^5 N
d
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A 50 cm long organ pipe is filled with air and is open at both ends. The velocity of sound in air at 0
is 331 m/s. What is the wavelength of the second mode?
A. 50 cm B. 75 cm C. 90 cm D. 40 cm E. 63 cm
A 200 g hockey puck is launched up a metal ramp that is inclined at a 30° angle. The coefficients of static and kinetic friction between the hockey puck and the metal ramp are ?s = 0.40 and ?k = 0.30, respectively
The puck's initial speed is 63 m/s. What vertical height does the puck reach above its starting point? A) 130 m B) 270 m C) 200 m D) 66 m
A simple harmonic oscillator has an amplitude of 3.50 cm and a maximum speed of 28.0 cm/s. What is its speed when the displacement is 1.75 cm?
A) 12.0 cm/s B) 24.2 cm/s C) 14.2 cm/s D) 15.0 cm/s E) 17.0 cm/s
A 500-Hz whistle is moved toward a listener at a speed of 10.0 m/s. At the same time, the listener moves at a speed of 20.0 m/s in a direction toward the whistle. What is the apparent frequency heard by the listener? (The speed of sound is 340 m/s.)
a. 473 Hz c. 533 Hz b. 485 Hz d. 545 Hz