Which of the following best describes the meaning of "force"?
A) A body's force is the tendency of that body to continue moving once it is started moving.
B) A force is a change in velocity.
C) The force of a moving body is the distance the body travels divided by the time it takes to travel that distance.
D) A body exerts a force on another body when the first body causes the second body to accelerate.
E) The force that a body has is the amount of work that the body can do.
D
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Thin Films: An oil film with refractive index 1.48 and thickness 290 nm is floating on water and illuminated with white light at normal incidence. What is the wavelength of the dominant color in the reflected light?
A. green (541 nm) B. blue-green (493 nm) C. violet (404 nm) D. yellow (572 nm) E. blue (470 nm)
Nuclear ________ explains the Sun's immense and sustained energy output
Fill in the blank(s) with correct word
The equation H2O2 ? H2O + O is not correctly written because
a. the number of atoms of each element on each side is not the same. b. the mass indicated on each side is not the same. c. oxygen is diatomic. d. hydrogen peroxide decomposes to H2O and H.
1-Bromobutane and 4-bromobutane are
a. the same compound. b. neither isomers nor the same compound. c. isomers.