Two uses of ultrasound are __________ and __________
Fill in the blank(s) with correct word
forming images of internal organs, navigation by bats, automatic focus cameras, controlling insects
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A family goes on vacation for one week, but forgets to turn off an electric fan that consumes electricity at the rate of 200 watts. If the cost of electricity is $0.120/kW-h, how much does it cost to run the fan?
What will be an ideal response?
Which of the following best represents the energy transformations occurring in a wind-generated power plant?
A) electric ? thermal ? kinetic B) kinetic ? electric ? thermal C) thermal ? kinetic ? electric D) chemical ? thermal ? electric E) kinetic ? thermal ? electric
Gamma rays are photons with very high energy. What is the wavelength of a gamma-ray photon with energy 7.7 × 10-13 J? (c = 3.0 × 108 m/s, h = 6.626 × 10-34 J ? s)
A) 3.1 × 10-13 m B) 3.5 × 10-13 m C) 3.9 × 10-13 m D) 2.6 × 10-13 m
If the resultant force acting on a 2.0-kg object is equal to 
N, what is the change in kinetic energy as the object moves from 
m to
src="https://sciemce.com/media/2/ppg__cognero__Chapter_9_Energy_in_Nonisolated_Systems.__media__e45505c6-cd94-4a7d-9369-dadf59e7a269.PNG" data-wiris-created="true" class="Wirisformula" align="middle" />m? A. +36 J B. +28 J C. +32 J D. +24 J E. +60 J