Eros is the only asteroid upon which a spacecraft has landed
Indicate whether the statement is true or false
TRUE
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While Ganymede and Callisto are about the same size, the surface of Callisto is much younger, with considerable tectonic reformation
Indicate whether the statement is true or false
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?
Beings on spherical asteroid ? have observed that a large rock is approaching their asteroid in a collision course. At 7514 km from the center of the asteroid, the rock has a speed of 136.0 m/s and later at 2823 km it has a speed of 392.0 m/s
Use energy conservation to find the mass of asteroid ?. You can neglect any effects due to the parent star of the asteroid. (G = 6.67 × 10-11 N ? m2/kg2) A) 4.582 × 1021 kg B) 9.164 × 1027 kg C) 6.112 × 1028 kg D) 4.582 × 1020 kg
If the resistance in a constant voltage circuit is doubled, the power dissipated by that circuit will
A) increase by a factor of two. B) increase by a factor of four. C) decrease to one-half its original value. D) decrease to one-fourth its original value.