Which statement is true about the speed of light? (2 points) Light travels relatively slowly. Distance in space is measured using the speed of light. Time in space is measured using the speed of light. The speed of light is unknown.

Which of the following elements is a representative element? a. chromium (cr) b. aluminum (al) c. mercury (hg) d. silver (ag)

Which part of earth’s surface receives the most direct rays from the sun? a) equator b) ocean c) poles d) mountains

The twister and runaway train are two coasters at the same amusement park. both coasters start at the same height. the coaster for the twister is twice the mass of the coaster for the runaway train. which roller coaster has greater gravitational potential energy at the start of the ride?