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
Answer: B
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Iron is classified as a(n) ______________.
Fill in the blank(s) with the appropriate word(s).
Matter Waves: A crystal diffracts a beam of electrons, like a diffraction grating, as they hit it perpendicular to its surface. The crystal spacing is 0.18 nm, and the first maximum scattering occurs at 80° relative to the normal to the surface. (e = 1.60 × 10-19 C, melectron = 9.11 × 10-13 kg, h = 6.626 × 10-34 J ? s)(a) What is the wavelength of the electrons?(b) What potential difference accelerated the electrons if they started from rest?
Fill in the blank(s) with the appropriate word(s).
In a visual binary system with circular orbits, if in 20 years the two stars' position angles have shifted by 30 degrees, the pair's period must be:
A) 60 years. B) 90 years. C) 120 years. D) 240 years. E) 360 years.
A laser beam (? = 694 nm) is incident on two slits 0.100 mm apart. Approximately how far apart (in m) will the bright interference fringes be on the screen 5.00 m from the double slits?
a. 3.47 × 10^?3 b. 3.47 × 10^?2 c. 3.47 × 10^?4 d. 3.47 × 10^?6 e. 3.47 × 10^?5