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
baherus [9]
3 years ago
12

An ore sample weighs 17.50 N in air. When the sample

Physics
1 answer:
zysi [14]3 years ago
7 0

Answer with Explanation:

We are given that

Weight of an ore sample=17.5 N

Tension in the cord=11.2 N

We have to find the total volume and the density of the sample.

We know that

Tension, T=W-F_b

F_b=buoyancy force

T=Tension force

W=Weight

By using the formula

11.2=17.5-F_b

F_b=17.5-11.2=6.3 N

F_b=V_{object}\times \rho_{water}\cdot g

Where

V_{object}=Volume of object

\rho_{water}=1000 kgm^{-3}=Density of water

g=9.8 ms^{-2}=Acceleration due to gravity

Substitute the values then we get

6.3=9.8\times 1000\times V_{object}

V_{object}=\frac{6.3}{9.8\times 1000}=6.43\times 10^{-4} m^3

Volume of sample=6.43\times 10^{-4} m^3

Density of sample,\rho_{object}=\frac{Mass}{volume_{object}}

Where mass of ore sample=1.79 kg

Substitute the values then, we get

\rho_{object}=\frac{1.79}{6.43\times 10^{-4}}=2.78\times 10^3 kg/m^3

Density of the sample=2.78\times 10^{3} kgm^{-3}

You might be interested in
Which statement is TRUE? Group of answer choices a) An object that is slowing down while traveling in the negative x-direction a
slava [35]

Answer:

d) An object that is speeding up always has a positive acceleration, regardless of the direction it travels.

Explanation:

a ) a) An object that is slowing down while traveling in the negative x-direction always has a positive acceleration.

It has negative acceleration in  the negative x-direction.

b) An object that is speeding up while traveling in the negative x-direction always has a positive acceleration.

It has a positive acceleration in the negative x-direction'

c) An object that is slowing down always has a negative acceleration, regardless of the direction it travels.

It has a positive  acceleration in opposite direction.

e ) An object that is slowing down always has a positive acceleration, regardless of the direction it travels.

It has a positive acceleration only in opposite direction .

6 0
3 years ago
A dart gun shoots a dart with an angle of 45' above horizontal During the upward part of the trajectory the gravitational accele
ludmilkaskok [199]

Answer:

4. Downward and its value is constant

Explanation:

As this is a case of projectile motion, we use the reference frame where upward direction to be positive for y, and in the same way to be negative in the downward direction. On another hand, we have that gravity is always acting this means that gravitational acceleration g is directed downward constantly over the dart not only during the upward but also during the downward part of the trajectory. And it is ruled by the following equations.

For the x-axis

v_{x}=v_{0}cos(45\°)=constant

x=(v_{0}cos(45\°))t

For the y-axis

v_{y}=v_{0}sin(45\°)-gt

y=v_{0}sin(45\°)t-\frac{1}{2} gt^{2}

Where v_{0}, is the initial velocity.

8 0
3 years ago
Which element is not part of the rhetorical triangle designed by Aristotle? speaker credibility audience emotion content logic l
ser-zykov [4K]
The correct answer is this one: "length of address." The element that is not part of Aristotle's rhetorical triangle is the length of the address. The rhetorical triangle of Aristotle are the logos, pathos, and ethos. Logos is the logic, Pathos is the audience emotion, Ethos is the speaker's credibility.
3 0
3 years ago
Read 2 more answers
Describe in brief the importance of measurement in our daily life?<br>​
Volgvan

Measurement tools make our lives safer and better? And they increase the quality and quantity of life. Arguably, the ability to measure calculating

physical properties accurately have tremendous survival value that gives humans adaptive, evolutionary advantages sharpened through many years of natural selection.

6 0
3 years ago
Set kinetic energy equal to potential energy and solve for velocity
nikdorinn [45]
KE = PE
1/2 m • v^2 = mgh
1/2 • v^2 = gh
V^2/2 = gh
2 • (v^2/2) = 2 • (gh)
V^2 = 2gh
V = sq root (2gh).
8 0
3 years ago
Other questions:
  • What happens to the force of gravity between two masses if one mass is decreased?
    6·2 answers
  • What intitial action is the reason behind beginning a scientific investigation
    7·1 answer
  • An astronaut drops a hammer from 2.0 meters above the surface of the moon. if the acceleration due to gravity on the moon is 1.6
    12·2 answers
  • When conducting an investigation outside, you can assume it is safe to touch my plant or animal you see.
    8·1 answer
  • A brick sits on the top of a hill with a gravitational potential energy of 245 J. To determine the gravitational potential of th
    7·1 answer
  • How do I calculate the frequency of an observer
    6·1 answer
  • Condensation is the process of ____________________.
    14·1 answer
  • How much time will it take for a truck to travel 20 meters if it is traveling at 4 m/s?
    7·2 answers
  • Identify the following as
    13·1 answer
  • 22.What factor determines in the direction of heat flow between objects?Select one:a. The difference in density of the objects.
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!