An airplane sprinkles black soot on a snow-covered field. The soot will increase the rate that the snow melts because A. soot increase the melting point of snow
B. soot decreases the surface area of ice crystals
C. soot decreases the specific heat capacity of the snow
D. a black surface absorbs more sunlight than a white surface

Which of the following situations is impossible? a) an object has velocity directed east and acceleration directed east. b) an object has zero velocity but non-zero acceleration. c) an object has constant non-zero velocity and changing acceleration. d) an object has velocity directed east and acceleration directed west. e) an object has constant non-zero acceleration and changing velocity.

The two stars in a certain binary star system move in circular orbits. the first star, alpha, has an orbital speed of 36 km/s. the second star, beta, has an orbital speed of 12 km/s. the orbital period is 137 d. a) what is the mass of the star alpha? b) what is the mass of the star beta?

Which word expression describes how much to calculate pressure