1.An object weighs 15.6 N in air and 12.8 N when submerged in mineral spirits, w

Question

1.An object weighs 15.6 N in air and 12.8 N when submerged in mineral spirits, which has a density of 876 kg/m3.   Determine the density of the object.

Question options:

4.78 104 kg/m3

3.93 104 kg/m3

4.88 103 kg/m3

4.01 103 kg/m3

2.59 103 kg/m

2. When a block of volume 1.00 103 m3 is hung from a spring scale as shown in Figure A, the scale reads 12.6 N. When the same block is then placed in an unknown liquid, it floats with 2/3 of its volume submerged as suggested in Figure B. The density of water is 1.00 103 kg/m3.

Question options:

9.80 kg

6.53 kg

3.44 kg

2.29 kg

1.29 kg

3. A balloon is released from a tall building. The total mass of the balloon including the enclosed gas is 3.24 kg. Its volume is 4.82 m3. The density of air is 1.30 kg/m3.

Question options:

zero m/s2

9.14 m/s2

9.80 m/s2

12.1 m/s2

16.4 m/s2

4. Selena uses a garden hose to fill a bucket of water. The water enters the hose through a faucet with a 3.8 cm diameter. The speed of the water at the faucet is 6.2 m/s. If the faucet and the nozzle are at the same height, and the water leaves the nozzle with a speed of 16 m/s, what is the diameter of the nozzle?

Question options:

1.2 cm

2.4 cm

3.6 cm

4.8 cm

6.0 cm

A)

4.78 104 kg/m3

B)

3.93 104 kg/m3

C)

4.88 103 kg/m3

D)

4.01 103 kg/m3

E)

2.59 103 kg/m

1.An object weighs 15.6 N in air and 12.8 N when submerged in mineral spirits, which has a density of 876 kg/m^3. Determine the density of the object. Question options: A) 4.78 ½ 10^4 kg/m^3 B) 3.93 ½ 10^4 kg/m^3 C) 4.88 ½ 103 kg/m^3 D) 4.01 ½ 10^3 kg/m^3 E) 2.59 ½ 10^3 kg/m 2. When a block of volume 1.00 ½ 10½3 m^3 is hung from a spring scale as shown in Figure A, the scale reads 12.6 N. When the same block is then placed in an unknown liquid, it floats with 2/3 of its volume submerged as suggested in Figure B. The density of water is 1.00 ½ 10^3 kg/m^3. Question options: A) 9.80 kg B) 6.53 kg C) 3.44 kg D) 2.29 kg E) 1.29 kg 3. A balloon is released from a tall building. The total mass of the balloon including the enclosed gas is 3.24 kg. Its volume is 4.82 m^3. The density of air is 1.30 kg/m^3. Question options: A) zero m/s^2 B) 9.14 m/s^2 C) 9.80 m/s^2 D) 12.1 m/s^2 E) 16.4 m/s2 4. Selena uses a garden hose to fill a bucket of water. The water enters the hose through a faucet with a 3.8 cm diameter. The speed of the water at the faucet is 6.2 m/s. If the faucet and the nozzle are at the same height, and the water leaves the nozzle with a speed of 16 m/s, what is the diameter of the nozzle? Question options: A) 1.2 cm B) 2.4 cm C) 3.6 cm D) 4.8 cm E) 6.0 cm

Explanation / Answer

1. B) 3.93

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