A visual defect wherein a person can see nearby objects clearly but not distant objects is called
a. dispersion.
b. destructive interference.
c. farsightedness.
d. nearsightedness.
d
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Complete and balance the equation: Mg + HC2H3O2 ? _____________________
Fill in the blank(s) with correct word
Gravitational Force: When a spacecraft is launched from the earth toward the sun, at what distance from the earth will the gravitational forces due to the sun and the earth cancel?Earth's mass is 5.97 × 1024 kg, the sun's mass is 1.99 × 1030 kg, and the Earth-sun distance is 1.5 × 1011 m.
A. 1.3 × 108 m B. 2.6 × 108 m C. 1.3 × 1010 m D. 2.6 × 1010 m
Which of the following is required for helium fusion as compared to hydrogen fusion?
A) much higher temperature B) much higher density C) a star of much greater mass D) a star that is much older in age
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).