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
lana [24]
3 years ago
9

Please help me to solve this and give me the summary of answer

Physics
1 answer:
Neko [114]3 years ago
7 0
Using the principle of floatation.

u = w............(a)

Upthrust of fluid is equal to the weight of the object.

Let the volume of the wood be V.

The upthrust u, is related to the volume submerged in water, and that is 1/5 of it volume, that is (1/5)V = 0.2V

Formula for upthrust, u = vdg

where v = volume of fluid displaced
d = density of fluid
g = acceleration due to gravity

weight, w = mg
where m = mass
g = acceleration due to gravity

From (a)

                     u = w

                 vdg =  mg      Cancel out g

                   vd  =  m
 
The v  is equal to 0.2V, which is the submerged volume. Notice that the small letter v is volume of fluid displaced, and capital V is the volume of the solid.

d is density of fluid which is water in this case, 1000 kg/m³

         0.2V * 1000 =  m

           200V =  m

Hence the mass of the object is  200V  kg.

But Density of solid =  Mass of solid / Volume of solid

                                 =    200V / V

                                 =    200 kg/m³

Density of solid = 200 kg/m³     
You might be interested in
Describe how to make a position-time graph.
salantis [7]

Answer:

There's a video called Drawing Position vs Time Graphs made by MrDGenova that may help you, it's only three minutes long.

Explanation:

Hope that helps, if not, you could tell me what you don't understand and I could try explaining it in further detail.

3 0
3 years ago
Explain what is the capacity of a battery in your own words​
Vinil7 [7]

Battery capacity (AH) is defined as a product of the current that is drawn from the battery while the battery is able to supply the load until its voltage is dropped to lower than a certain value for each cell.

4 0
3 years ago
Energy caused by the flow of ocean water
Arlecino [84]
It’s thermal energy
8 0
3 years ago
Water flowing through a small creek into a stream after a storm is an example of _____.
Serggg [28]
Runoff water i belive
7 0
3 years ago
A tissue sample at 275 K is submerged in 2 kg of liquid nitrogen at 70 K for cryopreservation. The final temperature of the nitr
kirill115 [55]

Answer:

The heat capacity of a sample is 37.7 J/K.

Explanation:

Given that,

Submerged temperature of tissue sample = 275 K

Mass of liquid nitrogen= 2 kg

Temperature = 70 K

Final temperature = 75 K

We need to calculate the heat

Using formula of heat

Q=mc(T_{f}-T_{i})

Put the value into the formula

Q=2\times1.039\times10^{3}\times(75-70)

Q=10390\ J

We need to calculate the heat capacity of a sample

Using formula of heat capacity

\Delta S=\dfrac{Q}{T}

Put the value into the formula

\Delta S=\dfrac{10390}{275}

\Delta S=37.7\ J/K

Hence, The heat capacity of a sample is 37.7 J/K.

7 0
3 years ago
Read 2 more answers
Other questions:
  • (b) Find the position, velocity, and acceleration of the mass at time t = 5π/6.
    14·1 answer
  • What is the role of the part in the diagram labeled Y?
    10·1 answer
  • Show that the energy of a magnetic dipole m in a magnetic field B is U--m B
    15·1 answer
  • How do chemical formulas represent compounds? <br> Help PLEASE
    8·2 answers
  • The mass of all bicycles and riders indicated in the graph are equal. What indicates the order of their average velocity from gr
    12·2 answers
  • What is the most effective way to protect dry lands from desertification
    14·2 answers
  • An 800-kHz radio signal is detected at a point 4.5 km distant from a transmitter tower. The electric field amplitude of the sign
    13·1 answer
  • Need some help please answer please
    11·1 answer
  • Convert 0.0779 kg to g
    11·1 answer
  • Magnetic field strength decrease when what is increases
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!