H3PO4 is the formula for ______________acid

Fill in the blank(s) with correct word


phosphoric

Physics & Space Science

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Holograms employ the principle of

A) diffraction. B) interference. C) both of these D) neither of these

Physics & Space Science

Two lenses, the first with focal length 10.0 cm and the second with focal length -12.5 cm, are separated by 20.0 cm. An object, 2.40 cm tall, is 15.0 cm in front of the first lens. What is the size of the final image?

A. 2.40 cm B. 4.80 cm C. 12.4 cm D. 24.0 cm E. 0.96 cm

Physics & Space Science

A swimmer heading directly across a river that is 200 m wide reaches the opposite bank in 6 min 40 s. During this swim, she is swept downstream 480 m. How fast can she swim in still water?

A) 0.50 m/s B) 0.80 m/s C) 1.2 m/s D) 1.4 m/s E) 1.8 m/s

Physics & Space Science

An ambulance is generating a siren sound at a frequency of 2,400 Hz. The velocity of sound is 345.0 m/s. The observer is traveling at a velocity of 24.00 m/s toward the ambulance and the ambulance is traveling at a velocity of 24.00 m/s away the observer. What is the frequency of the siren perceived by the observer?

A. 2,448 Hz B. 2,424 Hz C. 2,400 Hz D. 2,376 Hz E. 2,352 Hz

Physics & Space Science