Question

1. the formula used to find the volume of a rectangular piece of glass isa. mass × volumeb. length × width × heightc. grams ÷ millilitersd. height ÷ width9. if the pointer on a triple beam balance does not line up at zero before measuring, you shoulda. ignore itb. add 1 gramc. adjust the zero knobd. subtract 10 grams10. if 7 marbles in a cup have a mass of 70 grams, what is the average mass of one marble?a. 7 gb. 10 gc. 63 gd. 77 g11. why is it important to measure at eye level when using a graduated cylinder?a. to avoid parallax errorb. to increase massc. to change volumed. to reduce temperature12. if the mass of a glue stick is 25 g and its volume is 20 ml, which property are you able to calculate?a. temperatureb. densityc. lengthd. color13. which object would most likely require water displacement to measure volume?a. rectangle glassb. glue stickc. marbled. book14. if 50 ml of water has a mass of about 50 grams, what does this tell you about water?a. it has no massb. it is heavier than all solidsc. 1 ml of water has a mass of about 1 gd. volume and mass are unrelated15. when finding the mass of scissors on a triple beam balance, you shoulda. place them carefully in the centerb. hold them in your handc. guess the massd. add water

Explanation:

1. A rectangular solid's volume uses length×width×height.
2. Triple beam balances need zero alignment via the zero knob.
3. Average mass = total mass ÷ number of marbles.
4. Eye-level measurement avoids parallax error in cylinders.
5. Density is calculated as mass/volume, using given values.
6. Irregularly shaped marbles need water displacement for volume.
7. Divide total mass by volume to find per-mL mass of water.
8. Objects on a triple beam balance must be centered for accuracy.

Answer:

1. B. length × width × height
2. C. adjust the zero knob
3. B. 10 g
4. A. To avoid parallax error
5. B. Density
6. C. Marble
7. C. 1 mL of water has a mass of about 1 g
8. A. place them carefully in the center