Answer:
option A is correct answer of this question
Explanation:
=> it allows us to see with candles and kerosene lamps
hope it helps
A crude oil storage tank initially contains 1000 of crude oil. Oil is pumped into the tank through a pipe at a rate of 2 and out of the tank at a velocity of 1.5 m/s through another pipe having a diameter of 0.15m. The crude oil has a specific volume of 0.0015 . Determine:a) The mass of oil in the tank, in kg, after 24 hoursb) The volume of oil in the tank, in , at that time
This question is incomplete, the complete question is;
A crude oil storage tank initially contains 1000 m³ of crude oil. Oil is pumped into the tank through a pipe at a rate of 2 m³/min and out of the tank at a velocity of 1.5 m/s through another pipe having a diameter of 0.15m. The crude oil has a specific volume of 0.0015 m³/kg .
Determine : a) The mass of oil in the tank, in kg, after 24 hours b) The volume of oil in the tank, in m³, at that time ( after 24hrs )
Answer:
a) The mass of oil in the tank after 24hrs is 1059852.6667 kg
b) The volume of oil in the tank, in m³, at that time is 1589.779 m³
Explanation:
Given that;
volume of tank v = 1000 m³
Discharge (AV)₁ = 2 m³/min
specific volume (v) = 0.0015 m³/kg
a)
for one inlet, one exit control volume, we have]
d(mc[tex]_v[/tex])/dt = "m[tex]_i[/tex] - "m[tex]_e[/tex]
"m[tex]_i[/tex] = (AV)₁ / v
"m[tex]_i[/tex] = 2 / 0.0015
"m[tex]_i[/tex] = 1333.33 kg/min = ( 1333.33 kg/min × 60 ) = 80,000 kg/hr
"m[tex]_e[/tex] = AV₂/v
AREA A = πr² = π(0.15m/2)²
so
"m[tex]_e[/tex] = ( π(0.15m/2)² × 1.5 m/s ) / 0.0015m³/kg
"m[tex]_e[/tex] = 17.6714 kg/s = (17.6714 kg/s × 60 × 60 ) = 63,617.25 kg/hr
d(m[tex]_{cv}[/tex])/dt = 80000 - 63,617.25 = 16382.75 kg/hr
now after 24 hours, the mass of the crude oil tank is;
mc[tex]_v[/tex]( 24 ) = ( 16382.75 × 24 ) + mass initially contained
so initial mass m[tex]_i[/tex] = volume / specific volume
initial mass m[tex]_i[/tex] = V / v = 1000 / 0.0015 = 666,666.6667 kg
Total mass = m[tex]_i[/tex] + mc[tex]_v[/tex]
Total mass = 666,666.6667 kg + (16382.75 × 24)
Total mass = 1059852.6667 kg
Therefore, The mass of oil in the tank after 24hrs is 1059852.6667 kg
b)
Volume will be;
V = total mass × density
V = 1059852.6667 kg × 0.0015 m³/kg
V = 1589.779 m³
Therefore, The volume of oil in the tank, in m³, at that time is 1589.779 m³
4. What quantity of heat is required to raise the temperature of 100
grams of water from 25°C to 45°C? I
Answer:
Q = 836.4 Joules.
Explanation:
Given the following data;
Mass = 100 grams
Initial temperature = 25°C
Final temperature = 45°C
We know that the specific heat capacity of water is equal to 4.182 J/g°C.
To find the quantity of heat;
Heat capacity is given by the formula;
[tex] Q = mcdt[/tex]
Where;
Q represents the heat capacity or quantity of heat.
m represents the mass of an object.
c represents the specific heat capacity of water.
dt represents the change in temperature.
dt = T2 - T1
dt = 45 - 25
dt = 20°C
Substituting the values into the equation, we have;
[tex] Q = 100*4.182*20[/tex]
Q = 836.4 Joules.
Direction of Wave Travel
С
Which letter
correctly
identifies the
wavelength of
this wave?
А
B
A. A
B. B
C. C
Answer:
I THINK it's A but I'm not completely sure
(b) Two containers made of insulating material contain the same volume of water at room
temperature. The containers do not have lids. The volume of liquid in each container gradually
decreases.
(1) After a certain time, the temperature of the water has decreased to below room
temperature
Explain, in terms of molecules, why the temperature has decreased.
[2]
Answer:
the volume of liquid decreased due to evaporation from the exposed free surface of water so molecules got evaporated .
evaporation occurs at room temperature.
Given the displacement vector D = (4î − 8ĵ) m, find the displacement vector R (in m) so that D + R = −3Dĵ. (Express your answer in vector form.)
Answer:
--------------------------------
Explanation:
10. John does 176 J of work lifting himself a distance of 0.40 m. How
much force must John apply to accomplish this?
O 440 m
O 440 J
O 440 N
O 70.4 J
The statement "If a plant receives fertilizer,
then it will grow to be bigger than a plant
that does not receive fertilizer" is an
example of
A. an observation.
B. a hypothesis.
C. a theory.
A cricketer lowers his hand while catching balls. Why?
Answer:
While catching a ball, a cricket player lowers his hands, because by doing so, he increases the time of catch. That is, the person increases the time to bring about a given change in momentum, and hence rate of change of momentum decreases. Thus, a small force is exerted by ball on the hands.
Explanation:
:)
Answer:
it is your answer....... if it is helpful plzz like and comment
how is sound produced by using pipel wind instruments
Answer33
Explanation
33
a box is at rest on a slope
Answer:
170 N
Explanation:
The following data were obtained from the question:
Mass (m) = 20 Kg
Angle (θ) = 30°
Acceleration due to gravity (g) = 9.8 m/s²
Weight (W) =?
The perpendicular component of the weight can be obtained by using the following formula:
W = mg × Cosθ
W = 20 × 9.8 × Cos 30
W = 196 × 0.866
W = 169.7 ≈ 170 N
Therefore, perpendicular component of the weight is 170 N
High-velocity charged particles can damage biological cells and are a component of radiation exposure in a variety of locations ranging from research facilities to natural background. Describe how you could use a magnetic field to shield yourself.
Answer:
The human body can be a source of magnetic fields. Charged particles when moving through a magnetic field experiences a force. This magnetic force on a moving charge is at right angles to the velocity which makes it possible to use the knowledge of the magnetic field on charged particles to shield yourself from radiation exposure by staying at a right angle to the velocity of the field since magnetic fields tend to shield moving charged particles that is at a right angle to the field. Though the charged particle’s kinetic energy and speed will remain constant.
Explanation:
A magnetic field is a vector field that is generated whenever an electrical charge is moving,
5. If it takes 50 seconds to lift 10 Newtons of books to a height of 7 meters, calculate the power
required
Answer:
P = 1.4 Watts
Explanation:
Given that,
Weight of books, W = 10 N
It takes 50 seconds to lift the books to a height of 7m. We need to find the power required. Let the power be P. It can be done as follows :
[tex]P=\dfrac{W}{t}\\\\P=\dfrac{mgh}{t}\\\\P=\dfrac{10\times 7}{50}\\\\P=1.4\ W[/tex]
So, the power required is 1.4 watts.
- Atoms of different elements:
(a) Have the same atomic heat capacity.
(b) Have the same specific heat.
(c) Have the same heat capacity.
The stem cell therapy is ethical?
Is there more than one way to get two objects with identical masses to balance? How?
Answer: yes you can
Explanation: because i i have a trying and a squar that have the same mass it would caunt as the same
Yes we can get two objects with identical masses to balance in this type of scenario.
What is Mass?
This is defined as the quantity of matter which is present in a body at a given point in time.
The two objects with identical masses can be made to balance through the use of a string and a pulley.
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How much force is needed accelerate a 35 kg sled from 30 m/s to 65 m/s in 0.4 seconds?
Answer:
F = 3062.5 N
Explanation:
Given that,
The mass of a sled, m = 35 kg
The speed increase from 30 m/s to 65 m/s in 0.4 seconds.
We need to find the force needed to accelerate the car.
Net force is given by :
F = ma
where
a is acceleration of the car.
[tex]F=\dfrac{m(v-u)}{t}\\\\F=\dfrac{35\times (65-30)}{0.4}\\\\F=3062.5\ N[/tex]
So, the net force is 3062.5 N.
diffused reflection occurs if a ray of light is reflected by a
Answer:
Diffused reflection occurs if ray of light is reflected by rough surface
What happens in the inner ear
The inner ear has two special jobs. It changes sound waves to electrical signals (nerve impulses). This allows the brain to hear and understand sounds. The inner ear is also important for balance.
hope this helped :)
Answer:
Hope this helps ヾ(⌐■_■)ノ♪
Explanation:
Once the vibrations of the eardrum have been transmitted to the oval window, the sound waves continue their journey into the internal ear. The parts of the inner ear have very important purposes for your hearing and your balance.
.
The amount of sliding friction depends on the
a. weight of the moving object and the type of surface that the
object slides across.
b. density and volume of the object.
c. acceleration and mass of the object.
d. density and mass of the object.
*help please
Answer:
c I think so do u know the formula for friction??friction? lkke kinetic friction
Which water on earth is the largest,second to the largest,3rd to the largest,fourth to the largest and 5th to the largest?
Answer:
Explanation:
There are a total of 5 differen classification for the types of bodies of water that exist on Earth. These 5 would be the following: Oceans, seas, lakes, rivers, and canals. Oceans are the biggest bodies of water on Earth. If we ranked them by their size the ranking would be the following...
Pacific Ocean - being 155,556,651 sq km. in size
Atlantic Ocean - being 76,761,938 sq km. in size
Indian Ocean - being 68,555,923 sq km. in size
Antarctic / Southern Ocean - being 20,327,001 sq km. in size
Arctic Ocean - being 14,055,930 sq km. in size
How do the particles move and what does this tell you about the type of wave that sound is (transferred or longitudinal )
NEED ASAP WILL MAKE BRAINIEST
I need help with 5 please and thank you
Answer: A
Explanation:
Which of the following is an example of the transformation of gravitational potential energy into motion energy (kinetic energy)?
Answer:
c
Explanation:
because a drop of water is falling and that is gravitational potential energy into motion energy
A projectile is thrown with a velocity of 40 m/s, 45 degrees above the +x-axis. Determine its initial x-velocity and its initial y-velocity.
x-component is V·cos(angle)
y-component is V·sin(angle)
When the angle is 45°, its sin and cos are both 1/2·√2 .
Vx = 20·√2 = 28.28 m/s
Vy = 20·√2 = 28.28 m/s
What does the power source in a circuit provide?
the means to break a circuit
a path along which electricity can flow
static electricity
a steady flow of electrons
plsssssssssssssssssss answer plss not in a meen way but plssss anwer correctly
Explanation:
The primary function of a power supply is to convert electric current from a source to the correct voltage, current, and frequency to power the load. As a result, power supplies are sometimes referred to as electric power converters. Some power supplies are separate standalone pieces of equipment, while others are built into the load appliances that they power. Examples of the latter include power supplies found in desktop computers and consumer electronics devices. Other functions that power supplies may perform include limiting the current drawn by the load to safe levels, shutting off the current in the event of an electrical fault, power conditioning to prevent electronic noise or voltage surges on the input from reaching the load, power-factor correction, and storing energy so it can continue to power the load in the event of a temporary interruption in the source power (uninterruptible power supply).
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You want to use a metal bar as a resistor. Its dimensions are 1 by 3 by 13 units. To get the largest resistance from the bar, you should attach leads to the two opposite sides that have dimensions of 1 by 3 units. All configurations give the same resistance. 3 by 13 units. 1 by 13 units. None of the above.
Answer:
1 by 3 units
Explanation:
The resistance (R) of a conductor is given by the formula:
R = ρL / A
where L is the length of the conductor, ρ is resistivity and A is the cross sectional area.
Let us assume that the metal bar has a resistivity of ρ.
a) If the leads is attached to the two opposite sides that have dimensions of 1 by 3 units.
The length of the bar would be 13 units and the cross sectional area (A) would be = 1 * 3 = 3 units²
R₁ = ρL / A = ρ(13) / 3 = 13ρ / 3
b) If the leads is attached to the two opposite sides that have dimensions of 3 by 13 units.
The length of the bar would be 1 units and the cross sectional area (A) would be = 3 * 13 = 39 units²
R₂ = ρL / A = ρ(1) / 39 = ρ / 39
c) If the leads is attached to the two opposite sides that have dimensions of 1 by 13 units.
The length of the bar would be 3 units and the cross sectional area (A) would be = 1 * 13 = 13 units²
R₃ = ρL / A = ρ(3) / 13 = 3ρ / 13
Therefore we can see that the largest resistance is gotten If the leads is attached to the two opposite sides that have dimensions of 1 by 3 units
A stone with a mass of 0.600 kg is attached to one end of a string 0.900 m long. The string will break if its tension exceeds 50.0 N. The stone is whirled in a horizontal circle on a frictionless tabletop; the other end of the string remains fixed.
A. Draw a free-body diagram of the stone.
B. Find the maximum speed the stone can attain without breaking the string.
Answer:
8.7 m/s
Explanation:
Given data
Mass= 0.6kg
radius= 0.9m
Force= 50N
A. Please see attached the FBD of the stone
B. Apply the formula
F= mv^2/r
Substitute
50= 0.6*v^2/0.9
cross multiply
50*0.9= 0.6v^2
45= 0.6v^2
v^2= 45/0.6
v^2= 75
v= √75
v= 8.7 m/s
Hence the maximum speed attained without breaking the string is 8.7 m/s
How many atoms are in one mole of uranium?
A. 6.02 x 10^-23
B. Avogadro's number
C. 6.02 x 10^24
D. 6,020,000,000,000,000,000,000,000
Answer:
A
Explanation:
6.02×10^23 hope this helps
According to Avogadro's constant, 1 mole of uranium-235 will contain 6.022×10⁻²³ atoms of uranium-235 (option-A).
What is a mole of uranium?A mole of any element has an atomic mass on the Periodic Table that is equal to its mass in grams. A mole of uranium weighs 238.03 grams.
The atomic structure of uranium has 92 protons and 92 electrons, as indicated by its atomic number of 92. The nucleus of U-238 contains 146 neutrons, but this number can range from 141 to 146.
12 grams of pure carbon-12 weigh exactly one mole, or 6.022 x 1023 atoms, making one mole equivalent to 12 grams of pure carbon-12. • Avogadro's Number is the quantity of particles included in one mole (6.0221421 x 10⁻²³).
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Which phrase best completes the diagram?
Goals of Social Policy:
Providing citizens with an education ➡️Ensuring the safety of citizens➡️?
A. Helping people who live in poverty.
B. Increasing aid to foreign countries.
The correct answer is:
A. Helping people Who live in poverty
Answer:
Did you ask the question and answer it for yourself?
Answer:
Your amazing thank you, A was right.
What is picture ..........
Answer:
In its most general sense, a picture is a visual representation of something, especially in the form of a painting, drawing, photograph, or the like. A picture can also refer to a mental image, among other senses.
