The surface temperature of Venus is 750 K, even hotter than Mercury
Indicate whether the statement is true or false
TRUE
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A 50-turn circular coil (radius = 15 cm) with a total resistance of 4.0 ? is placed in a uniform magnetic field directed perpendicularly to the plane of the coil. The magnitude of this field varies with time according to B = A sin (?t), where A = 80 ?T and ? = 50? rad/s. What is the magnitude of the current induced in the coil at t = 20 ms?
a. 11 mA b. 18 mA c. 14 mA d. 22 mA e. zero
What is the image distance of an object 1.85 m in front of a converging lens of focal length 26.3 cm?
a. + 23.0 cm b. –1.99 cm c. + 30.6 cm d. + 159 cm e. + 4.80 cm
Two-Source Interference of Sound: Two in-phase loudspeakers that emit sound with the same frequency are placed along a wall and are separated by a distance of 8.00 m. A person is standing 12.0 m away from the wall, equidistant from the loudspeakers. When the person moves 3.00 m parallel to the wall, she experiences destructive interference for the second time. What is the frequency of the sound? The speed of sound in air is 343 m/s.
A. 278 Hz B. 422 Hz C. 452 Hz D. 562 Hz E. 694 Hz
Three particles are placed in the xy plane. A 30-g particle is located at (3, 4) m, and a 40-g particle is located at (?2, ?2) m. Where must a 20-g particle be placed so that the center of mass of the three-particle system is at the origin?
A. (?3, ?1) m B. (+1, +3) m C. (+3, ?1) m D. (?1, ?3) m E. (?0.5, ?2) m