1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Natasha_Volkova [10]
3 years ago
9

6. Balsa wood with an average density of 130 kg/m3 is floating in pure water. What percentage of the wood is submerged

Physics
1 answer:
yaroslaw [1]3 years ago
8 0

Answer:

The percentage of the submerged wood is 13%.

Explanation:

Given;

density of the Balsa wood, \rho _{wood}  = 130 kg/m³

density of pure water, \rho_{water} = 1000 kg/m³

The percentage of the submerged wood is calculated as;

Percentage \ of \ submerged \ wood = \frac{130 \ kg/m^3}{1000 \ kg/m^3} \ \times  \ 100 \% \\\\Percentage \ of \ submerged \ wood = 13 \ \%

Therefore, the percentage of the submerged wood is 13%.

You might be interested in
5/137 Under the action of its stern and starboard bow thrusters, the cruise ship has the velocity vB = 1 m/s of its mass center
quester [9]

The image is missing, so i have attached it;

Answer:

A) V_rel = [-(2.711)i - (0.2588)j] m/s

B) a_rel = (0.8637i + 0.0642j) m/s²

Explanation:

We are given;

the cruise ship velocity; V_b = 1 m/s

Angular velocity; ω = 1 deg/s = 1° × π/180 rad = 0.01745 rad/s

Angular acceleration;α = -0.5 deg/s² = 0.5 x π/180 rad = -0.008727 rad/s²

Now, let's write Velocity (V_a) at A in terms of the velocity at B(V_b) with r_ba being the position vector from B to A and relative velocity (V_rel)

Thus,

V_a = V_b + (ω•r_ba) + V_rel

Now, V_a = 0. Thus;

0 = V_b + (ω•r_ba) + V_rel

V_rel = -V_b - (ω•r_ba)

From the image and plugging in relevant values, we have;

V_rel = -1[(cos15)i + (sin15)j] - (0.01745k * -100j)

V_rel = - (cos15)i - (sin15)j - 1.745i

Note that; k x j = - i

V_rel = [-(2.711)i - (0.2588)j] m/s

B) Let's write the acceleration at A with respect to B in terms of a_b.

Thus,

a_a = a_b + (α*r_ba) + (ω(ω•r_ba)) + (2ω*v_rel) + a_rel

a_a and a_b = 0.

Thus;

0 = (α*r_ba) + (ω(ω•r_ba)) + (2ω*v_rel) + a_rel

a_rel = - (α*r_ba) - (ω(ω•r_ba)) - (2ω*v_rel)

Plugging in the relevant values with their respective position vectors, we have;

a_rel = - (-0.008727k * -100j) - (0.01745k(0.01745k * -100j)) - (2*0.01745k * [-(2.711)i - (0.2588)j])

a_rel = 0.8727i - (0.01745² x 100)j + 0.0946j - 0.009i

Note that; k x j = - i and k x i = j

Thus,simplifying further ;

a_rel = 0.8637i + 0.0642j m/s²

4 0
3 years ago
The number of moons a planet has orbiting around it is determined by...
Pavlova-9 [17]

We have no idea.  There are probably many things involved ... the planet's mass,
the availability of small bodies in the neighborhood that can be captured, etc.


7 0
3 years ago
Which of the following represents a system that is completely open?
Flauer [41]

B. A pot of boiling water represents a system that is completely open.

4 0
3 years ago
A fly sits on a potter's wheel 0.30 m from its axle. The wheel's rotational speed decreases from 4.0 rad/s to 2.0 rad/s in 5.0 s
earnstyle [38]

Answer:

0.4rad/s²

Explanation:

Angular acceleration is the time rate of change of angular velocity . In SI units, it is measured in radians per second squared (rad/s²)

w1 = 4rad/s, w2 =2rad/s, t = 5sec, r = 0.30m

a = ∆w/t

a = (w2 - w1)/t

a = (2 - 4)/5 = -2/5 =

a = - 0.4rad/s²

The -ve sign indicates a deceleration in the motion

Good luck

3 0
3 years ago
PHYSICS QUESTION - CAN ANYONE HELP NOW?
GrogVix [38]
It's velocity when it strikes the ground is. D. 232.9 kg.m/s<span>.
</span>
I hope this helps!!!







3 0
3 years ago
Read 2 more answers
Other questions:
  • How do scientists interpret data?
    7·1 answer
  • The law of universal gravitation states that any two objects in the universe, without exception,
    7·1 answer
  • Calculate the most probable speed of an ozone molecule in the stratosphere
    5·1 answer
  • Two charged bees land simultaneously on flowers that are separated by a finite distance. For a few moments, the charged bees res
    9·1 answer
  • The force between two magnetic poles varies directly with the distance of separation. True False
    8·2 answers
  • In order to be _______________ forces, their effects must cancel each other out and not cause a change in the object's motion
    12·1 answer
  • . You are sitting on a beach watching the waves roll in. In 12 seconds, 6 waves roll by. What is the period of the waves (7)? Wh
    9·1 answer
  • Lisa made the electromagnet shown. A nail with wire coiled around it has its head labeled S to the right and its point labeled N
    13·2 answers
  • The forces acting on a ball sitting on the ground are
    13·1 answer
  • Why does gravity on Earth have a stronger attraction with you than the sun has with you? Plsssssss help I really need this rn
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!