Which sentence is true about polaris and the sun? a) polaris is not as bright as the sun because it is not hot. b) polaris seems smaller than the sun because it is farther away. c) polaris looks dimmer than the sun because it is a different color. d) polaris is not big like the sun because it does not give off light. 5) the best description of a light-year is a) the speed of light in a vacuum. b) the age of a one-year-old star. c) the distance light travels in a year. d) the time it takes light to travel from earth to the sun.

Name the type of chemical that speeds up digestion

Consider the motion of the balloon and its air contents in terms of momentum. in step 1 above, the total momentum of the balloon and its contents was zero. recall that momentum = mv. both the balloon and the air inside it had a velocity of zero and therefore the total momentum was zero. now think about what happened when the air escaped from the balloon. a certain mass of air accelerated in one direction. in order to keep the total momentum of the system zero, the balloon itself (which has mass) had to accelerate in the opposite direction. use this scenario to you explain why the soda can rotates when the water squirts out of the escape holes. what was your hypothesis concerning the water-filled can? according to your data, do you think your hypothesis was correct? (be sure to refer to your data when answering this question.) summarize any difficulties or problems you had in performing the experiment that might have affected the results. describe how you might change the procedure to avoid these problems. give at least one more example of newton's third law in everyday life.

According to the cell theory, which describes cells? a. all organisms are composed of multiple cells. b. all cells have the same structure and function. c. cells are found in everything on earth. d. living organisms are not created spontaneously