The oldest parts of Earth's crust are located along the mid-ocean rifts

a. True
b. False
Indicate whether the statement is true or false


False

Physics & Space Science

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10?6 phones is equal to _______.

A. Mphone B. kphone C. mphone D. ?phone

Physics & Space Science

A large ice cube is 30 cm on each side. If the length of each side is increased by a factor of two, the surface area

A. increases by a factor of ½. B. increases by a factor of 2. C. increases by a factor of 4. D. increases by a factor of 8.

Physics & Space Science

A proton beam that carries a total current of 1.3 mA has 10.0 mm diameter. The current density in the proton beam increases linearly with distance from the center

This is expressed mathematically as J(r) = J0 (r/R), where R is the radius of the beam and J0 is the current density at the edge. Determine the value of J0. A) 25 A/m2 B) 6.2 A/m2 C) 12 A/m2 D) 17 A/m2

Physics & Space Science

A Young's double-slit apparatus is set up where a screen is positioned 1.2 m from the double slits. If the distance between alternating bright fringes is 0.83 cm, and the light source has a wavelength of 579 nm, what is the separation of the double slits? (1 nm = 10?9 m)

a. 1.2E–2 m b. 8.4E–5 m c. 7.0E–6 m d. 9.0E–5 m e. 4.0E–9 m

Physics & Space Science