PLEASE ANSWER

The graphic shows a red light shining on objects Q and R.

Object Q appears to be black, and object R appears to be red. Which of the following is correct?

A. Object Q refracts red light, and object R diffracts red light.

B. Object Q reflects red light, and object R absorbs red light.

C. Object Q absorbs red light, and object R reflects red light.

D. Object Q diffracts red light, and object R refracts red light.

Agroup of students is studying convection currents. they fill two identical balloons with the same amount of helium. one balloon is placed in a freezer and the other in an area with warm air. after 10 minutes, the balloons are released from a height of 1 meter. which of the following do the students most likely observe? a. the balloons both rise. the cold balloon is larger than the warm balloon. b. the balloons rise at the same rate. both balloons are the same size. c. the warm balloon expands and rises. the cold balloon shrinks and sinks. d. the cold balloon expands and rises. the warm balloon shrinks and sinks.

Which description best characterizes the motion of particles in a solid?

Ammonium perchlorate nh4clo4 is the solid rocket fuel used by the u.s. space shuttle. it reacts with itself to produce nitrogen gas n2 , chlorine gas cl2 , oxygen gas o2 , water h2o , and a great deal of energy. what mass of nitrogen gas is produced by the reaction of 2.1g of ammonium perchlorate?