When the temperature of the air is 50°c, the velocity of a sound wave traveling through the air is approximately?
a. 381 m/s
b. 30 m/s
c. 361 m/s
d. 50 m/s

In positive numbers less than 1, the zeros between the decimal point and non zero are significant

The gravitational force between pluto and charon is 3.61 × 1018 n. pluto has a mass of 1.3 × 1022 kg, which is only slightly greater than charon’s mass of 1.6 × 1021 kg. how far apart are pluto and charon? 2.0 × 107 m 2.4 × 1012 m 3.8 × 1014 m 5.8 × 1024 m

Mechanical energy is when there are no forces causing an object to lose energy. a. increased b. conserved c. decreased d. doubled i need this answer ! .