Which of the following statements is true of Uranus?
A) It grows massive to capture large amounts of gas from the solar nebula.
B) It has moons that are larger than Earth's moon.
C) It has an orbital period of 15 years.
D) It has a deep mantle of partly solid water.
D
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Object and image for a plane mirror occur
A) along the same plane. B) equal distances from the mirror. C) at right angles to each other. D) all of the above E) none of the above
A color of a star reveals its
A. Prism or A Diffraction Grating |
B. Annie Jump Cannon |
C. Temperature |
D. Spectroheliometer |
E. Continuous Spectrum |
F. Joseph Van Fraunhofer |
The electron gun in a television tube accelerates electrons (mass = 9.11 × 10?31 kg, charge = 1.60 × 10?19 C) from rest to 3.00 × 107 m/s within a distance of 2.00 cm. What electric field is required?
What will be an ideal response?
An electric device delivers a current of 5.0 A to a device. How many electrons flow through this device in 10 s? (e = 1.60 × 10-19 C)
A) 0.20 B) 20 C) 2.0 D) 3.1 × 1020 E) 31 × 1020