Question

A person who weighs 550 N empties her lungs as much as possible and is then completely immersed in water (of density 1000 kg/m3) while suspended from a harness. Her apparent weight is now 21.2 N. What is her density?

Answer #1

Density of her can be find using below formula

g= accelartion due to gravity

Density of her,

A sea lion (with lungs empty) is put on a scale when it is
completely submerged in water. The scale reads the “apparent weight
force” of the sea lion in water as 62.01-N. The sea lion has a mass
of 210.0-kg. The density of water is 1000 kg/m3.
Determine the density of the sea lion.
Select one:
a. 1000 kg/m3
b. 419 kg/m3
c. 1029 kg/m3
d. 1419 kg/m3

To verify her suspicion that a rock specimen is hollow, a
geologist weighs the specimen in air and in water. She finds that
the specimen weighs twice as much in air as it does in water. The
density of the solid part of the specimen is 2.20 × 103
kg/m3. What fraction of the specimen’s apparent volume
is solid?

To verify her suspicion that a rock specimen is hollow, a
geologist weighs the specimen in air and in water. She finds that
the specimen weighs twice as much in air as it does in water. The
density of the solid part of the specimen is 4.13 × 103 kg/m3. What
fraction of the specimen’s apparent volume is solid?

To verify her suspicion that a rock specimen is hollow, a
geologist weighs the specimen in air and in water. She finds that
the specimen weighs twice as much in air as it does in water. The
density of the solid part of the specimen is 4.06 × 103 kg/m3. What
fraction of the specimen’s apparent volume is solid?

A solid, aluminum ingot weighs 90 N in air
Part A
What is its volume?
Express your answer using two significant figures.
Part B
The ingot is suspended from a rope and totally immersed in
water. What is the tension in the rope (the apparent
weight of the ingot in water)?
Express your answer using two significant figures.

WOODEN CYLINDER
VALUES
mass (kg)
0.0354
weight (N)
0.34692
length (m)
0.290
diameter (m)
0.0163
volume (m3)
0.0002086
density (kg/m3)
169.7
WATER
VALUES
density (kg/m3)
1000
Vi (m3)
180 ml
V (m3)
213 ml
?V (m3)
33 ml
weight of displaced water (N)
0.3234
BRASS CYLINDER
VALUES
weight (N)
2.002
length (m)
0.0605
diameter (m)
0.0192
radius (m)
0.0095
volume (m3)
0.00001751
WA (N)
1.765
ALUMINUM CYLINDER
VALUES
weight (N)
0.621
length (m)
0.0605
diameter (m)
0.0192
radius (m)
0.0096...

1. A person pushes on a doorknob with a force of 5.00 N
perpendicular to the surface of the door. The doorknob is located
0.800 m from the axis of the hinges of the door. The door begins to
rotate with an angular acceleration of 2.00 rad/s2. What
is the moment of inertia of the door about hinges?
Select one:
a. 6.50 kg.m2
b. 2.50 kg.m2
c. 12.5 kg.m2
d. 2.00 kg.m2
2. A dumbbell has a connecting bar of...

The curator of a science museum is transporting a chunk of
meteorite iron (i.e., a piece of iron that fell from the sky -- see
picture at left) from one part of the museum to another. Since the
chunk of iron weighs 1240 N and is too big for her to lift by
herself, she is using a hand cart (see figure at right). While
passing through the marine mammals section of the museum, she
accidentally hits a bump and...

#1. A street light is supported by two wires and each makes a
different angle from each other. The one on the left is 32 degrees
and the one on the right is 43 degrees. Find the tension in each
wire if the street light has a mass of 60.0 kg.
#2. There are three masses: m1 = 2.0 kg, m2 = 5.0 kg and m3 =
7.0 kg. The masses are all affixed to a massless rod of length...

21) A person carries a 25.0-N rock through the path shown in the
figure, starting at point A and ending at point B. The total time
from A to B is 1.50 min. How much work did gravity do on the rock
between A and B?
A) 625 J
B) 20.0 J
C) 275 J
D) 75 J
E) 0 J
22) A person carries a 2.00-N pebble through the path shown in
the figure, starting at point A and...

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