Saturn appears to an earth-observer to emit 0.86x10 as much light as the sun. how far away would the earth have to be for the sun to appear to have a magnitude identical to that of saturn? (this approximates a first magnitude star). express your result in units of au.

Player kicks a soccer ball from ground level and sends it flying at an angle of 30 degrees at a speed of 26 m/s. what is the horizontal velocity component of the ball to the nearest tenth of a m/s?

Phase changes are chemical changes. true or false

Ablock of mass 1.5 kg slides down an inclined plane that has an angle of 15. if the inclined plane has no friction and the block starts at a height of 3 m, how much kinetic energy does the block have when it reaches the bottom? acceleration due to gravity is g = 9.8 m/s2. a. 6.8 j b. 50.9 j c. 0 j d. 44.1 j