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
BabaBlast [244]
2 years ago
5

Assignment 1.4

Physics
1 answer:
Flauer [41]2 years ago
6 0

you can use the graph to estimate the value of x when y is required to start a doubles match with the sun and the sky very well from her childhood and a kind young women who lives with her wearing a black and a veil and shows to be in that position or they have a bad past or bad life that they want to take revenge on every one by murder goes on by them in the streets of St and St Mary's Church and its followers are known as Sikhs and the other children claim she

You might be interested in
Determine the amount of time for polonium-210 to decay to one fourth its original quantity. The half-life of polonium-210 is 138
ira [324]

Answer: 276 days

Explanation:

This problem can be solved using the Radioactive Half Life Formula:  

A=A_{o}.2^{\frac{-t}{h}} (1)  

Where:  

A=\frac{1}{4}A_{o} is the final amount of the material

A_{o} is the initial amount of the material  

t is the time elapsed  

h=138 days is the half life of polonium-210

Knowing this, let's substitute the values and find t from (1):

\frac{1}{4}A_{o}=A_{o}2^{\frac{-t}{138 days}} (2)  

\frac{A_{o}}{4A_{o}}=2^{\frac{-t}{138 days}} (3)  

\frac{1}{4}=2^{\frac{-t}{138 days}} (4)  

Applying natural logarithm in both sides:

ln(\frac{1}{4})=ln(2^{\frac{-t}{138 days}}) (5)  

-1.386=-\frac{t}{138days}ln(2) (6)  

Clearing t:

t=276days (7)  

7 0
3 years ago
Salt water is denser than fresh water. a ship floats in both fresh water and salt water. compared to the fresh water, the volume
gavmur [86]
The ship floats in water due to the buoyancy Fb that is given by the equation:

Fb=ρgV, where ρ is the density of the liquid, g=9.81 m/s² is the acceleration of the force of gravity and V is volume of the displaced liquid.

The density of fresh water is ρ₁=1000 kg/m³.

The density of salt water is in average ρ₂=1025 kg/m³.

To compare the volumes of liquids that are displaced by the ship we can take the ratio of buoyancy of salt water Fb₂ and the buoyancy of fresh water Fb₁.

The gravity force of the ship Fg=mg, where m is the mass of the ship and g=9.81  m/s², is equal to the force of buoyancy Fb₁ and Fb₂ because the mass of the ship doesn't change:
 
Fg=Fb₁ and Fg=Fb₂. This means Fb₁=Fb₂.

Now we can write:

Fb₂/Fb₁=(ρ₂gV₂)/(ρ₁gV₁), since Fb₁=Fb₂, they cancel out:

1/1=1=(ρ₂gV₂)/(ρ₁gV₁), g also cancels out:

(ρ₂V₂)/(ρ₁V₁)=1, now we can input ρ₁=1000 kg/m³ and ρ₂=1025 kg/m³

(1025V₂)/(1000V₁)=1

1.025(V₂/V₁)=1

V₂/V₁=1/1.025=0.9756, we multiply by V₁

V₂=0.9756V₁

Volume of salt water V₂ displaced by the ship is smaller than the volume of sweet water V₁ because the force of buoyancy of salt water is greater than the force of fresh water because salt water is more dense than fresh water.  


7 0
3 years ago
A person of mass m will bungee-jump from a bridge over a river where the height from the bridge to the river is h. The bungee co
Likurg_2 [28]

Answer:k_{min}=\frac{18mg}{h}

Explanation:

Given

mass of person is m

Distance between bridge and river is h

chord has an un-stretched length of \frac{2h}{3}

Let spring constant be k

Person will just stop before hitting the river

Conserve energy i.e. Potential Energy of Person is converted in to elastic energy of chord

mgh=\frac{kx^2}{2}

x=h-\frac{2h}{3}=\frac{h}{3}

mgh=\frac{kh^2}{18}

k=\frac{18mg}{h}

Thus k_{min}=\frac{18mg}{h}

5 0
3 years ago
The diver is on a board3.00m above the water. She jumps straight up at 3.25m/s. How many seconds later does she hit the water.
tigry1 [53]
Speed =distance/time
3.25=3.00/time
3.25xt=3.00
t=3/3.25
s=0.9s
5 0
3 years ago
sticking your fingers into a wall socket will not bring you into direct contact with an electrical current. true or false
SCORPION-xisa [38]
The correct answer is false cause how can u fit your finger in a wall something it's to small
3 0
3 years ago
Read 2 more answers
Other questions:
  • A una distancia de 12.0 m dsde una fuente puntual, el nivel de intensidad es de 70dB. A que distancia desde la fuente el nivel d
    14·1 answer
  • I really need an answer to this today! Please help!
    13·1 answer
  • bailee bad a gross income of 2358.33 during each pay period in 2009. if she got paid monthly , how much of her oay was defucted
    5·1 answer
  • What happens to the magnetic force as the distance between two magnetic poles decreases?
    14·2 answers
  • How can two atoms of the same chemical element be different?
    10·1 answer
  • "What is the energy density (energy per cubic meter) carried by the magnetic field vector in a small region of space in a EM wav
    12·1 answer
  • For this problem, you will only be concerned with the geometric aspects of thin-film interference, so ignore phase shifts caused
    13·1 answer
  • Consider the following scenario. A car for which friction is not negligible accelerates from rest down a hill, running out of ga
    5·1 answer
  • Describe how you can determine:<br>a) Volume of an irregular body<br>b) Density of a liquid​
    7·2 answers
  • A 30 ohm resistor and a 20 ohm resistor are
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!