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What is the density of an object with a mass of 48 grams and a volume of 3 ml?
A.
144 g/ml
B.
16 g/ml
C.
45 g/ml
D.
51 g/ml
Correct Answer
B. 16 g/ml
Explanation The density of an object is calculated by dividing its mass by its volume. In this case, the mass of the object is given as 48 grams and the volume is given as 3 ml. So, the density can be calculated as 48 grams divided by 3 ml, which equals 16 grams per ml. Therefore, the correct answer is 16 g/ml.
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2.
A 10 cm^{3} sample of metal has a mass of about 90 g. What is the density of the metal?
A.
9 g/cm3
B.
900 g/cm3
C.
80 g/cm3
D.
100 g/cm3
Correct Answer
A. 9 g/cm3
Explanation The density of a substance is calculated by dividing its mass by its volume. In this case, the mass of the metal is given as 90 g and the volume is given as 10 cm3. By dividing 90 g by 10 cm3, we get a density of 9 g/cm3.
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3.
A piece of Silver has a mass of 77 grams and a volume of 11 cm^{3}. What is the density of Silver?
A.
88 g/cm3
B.
7 g/cm3
C.
77 grams
D.
11 cm3
Correct Answer
B. 7 g/cm3
Explanation The density of a substance is calculated by dividing its mass by its volume. In this case, the mass of the silver is given as 77 grams and the volume is given as 11 cm3. By dividing the mass (77 grams) by the volume (11 cm3), we get a density of 7 g/cm3.
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4.
Two cubes of the same size were measured. Both cubes had the same volume (size). Cube A was 52 grams and cube B was 130 grams. Which cube has the greatest density?
Cube A
52 g
Cube B
130 g
A.
Cube A
B.
Cube B
C.
Option 3
D.
Option 4
Correct Answer
B. Cube B
Explanation Cube B has the greatest density because it has a greater mass (130g) compared to Cube A (52g), even though both cubes have the same volume. Density is calculated by dividing mass by volume, so a greater mass with the same volume will result in a higher density.
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5.
Orange colored block
54 grams
9 cm^{3}
clear liquid
100 grams
100 ml
Steel cube
81 grams
9 cm^{3}
piece of aluminum
50 grams
25 cm^{3}
Which object has the lowest density?
A.
Aluminum
B.
Steel
C.
Clear Liquid
D.
Orange Colored Block
Correct Answer
C. Clear Liquid
Explanation The object with the lowest density is clear liquid. This is because it has a mass of 50 grams and a volume of 25 cm3, resulting in a density of 2 grams/cm3. In comparison, the steel cube has a density of 9 grams/cm3, the clear liquid has a density of 1 gram/cm3, and the orange colored block has a density of 6 grams/cm3. Therefore, clear liquid has the lowest density among the given objects.
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6.
What is the volume of a rectangular shaped object with a length of 5 cm, a width of 2 cm, and a height of 10 cm?
(Hint: volume of rectangular solid= l x w x h)
A.
17 cm3
B.
100 cm3
C.
3 cm3
D.
200 cm3
Correct Answer
B. 100 cm3
Explanation The volume of a rectangular shaped object can be calculated by multiplying its length, width, and height. In this case, the length is 5 cm, the width is 2 cm, and the height is 10 cm. Therefore, the volume can be calculated as 5 cm x 2 cm x 10 cm = 100 cm3.
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7.
The round object was placed in water to determine its volume. Before it was placed in the water, there was 100 ml of water. After it was submerged, 30 ml of water flowed out to the smaller container. What is the volume of the round object?
A.
30 ml
B.
100 ml
Correct Answer
A. 30 ml
Explanation When the round object was placed in water, it displaced 30 ml of water, which flowed out into a smaller container. This means that the volume of the round object is equal to the amount of water that flowed out, which is 30 ml.
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8.
A 48 gram metal bar was placed in water. The initial water level was 80 ml. The final volume was 86 ml. What is the volume of the bar and its density?
A.
Volume= 6 ml, density= 8 g/ml
B.
Volume= 6 ml, density = 54 g/ml
C.
Volume= 6 ml, density= 180 g/ml
D.
Volume = 6 ml, density= 0 g/ml
Correct Answer
A. Volume= 6 ml, density= 8 g/ml
Explanation The volume of the bar can be calculated by subtracting the initial water level from the final water level, which gives us 86 ml - 80 ml = 6 ml. The density of an object is calculated by dividing its mass by its volume. Since the mass of the bar is not given, we cannot calculate the exact density. Therefore, the only possible answer is volume = 6 ml, density = 8 g/ml.
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