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select the correct scientific notation form of this numeral. 1,263
(1) 12.63 × 10 ^ 2
(2) 1.263 × 10 ^ 3
(3) 12.63 × 10 ^ 3
(4) 1.2 × 10 ^ 3

The earth remains in orbit around the sun due to the force of gravity. how does the force of gravity exerted by the sun on the earth compare to the force of gravity exerted by the earth on the sun?

Ajet plane has a sound level of 120 db at a distance of 60 m. what is the q23. sound level at a distance of 6.0 km? (60)2 (6000)? om solution 80db db, hint: 16x assume ultrasound waves travel through the body of an animal at 1540 q24. m/s. if a 30,000 hz signal were reflected off a portion of a heart which was moving toward the source at 3 m/s, what frequency signal would return to the stationary source? solution 30.117hz

Lymphocytes known as blastocysts make antibodies that fight infection. select the best answer from the choices provided t f