Consider a container of 2.0 g of hydrogen, H2 (one mole). Suppose you removed all the electrons and moved them to the other side of Earth
(Earth's radius is 6380 km, k = 1/4??0 = 9.0 × 109 N ? m2/C2, NA = 6.022 × 1023 molecules/mol, e = 1.60 × 10-19 C)
(a) How much charge is left behind after you remove the electrons?
(b) What electric force do the protons exert on the electrons after they are separated as described?
(a) 1.9 × 105 C (b) 2.1 MN
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The Doppler technique can be used to measure the eccentricity of a planet's orbit by
A) measuring the amount by which the starlight is reduced when the planet transits. B) measuring the asymmetries in the velocity curve. C) measuring the time it takes for the star's line-of-sight velocity to cycle from peak to peak, and using Newton's version of Kepler's Third law. D) measuring the speed at which the star orbits the mutual center-of-mass of the star and planet, and using Newton's theory of gravity.
Vision Problems: A nearsighted person has a near point of 12 cm and a far point of 17 cm. If the corrective lens is 2.0 cm from his eye, (a) what lens power will enable this person to see distant objects clearly, and (b) what then will be the new near point of his eye?
What will be an ideal response?
Animations that change when the device moves are one example of UX-driven interactivity.
Answer the following statement true (T) or false (F)
In a double slit experiment, if the separation between the two slits is 0.050 mm and the distance from the slits to a screen is 2.5 m,
find the spacing between the first-order and second-order bright fringes when coherent light of wavelength 600 nm illuminates the slits. A) 1.5 cm B) 3.0 cm C) 4.5 cm D) 6.0 cm E) 9.0 cm