Answer:
density = 0.16[gr/cm^3] = 160 [kg/m^3]
Explanation:
To solve this problem we must use the definition of density which tells us that this is equal to the relationship between mass and volume. In this way we have:
Since the body is a cube, its sides are equal we have:
v = 5 * 5 * 5 = 125 [cm^3]
m = 20 [grams]
density = m / v
density = 20/125
density = 0.16 [grams/cm^3]
Now if we convert the units to the international system, we have:
[tex]0.16[\frac{gr}{cm^{3} } ]*\frac{1kg}{1000gr} *\frac{100^{3} cm^{3} }{1^{3} m^{3} } \\= 160 [kg/m^{3} ][/tex]
Thermal energy is the_____
energy of particles in an object.
Answer:
sum of the kinetic and potential energy
Explanation:
Which characteristics describe a spiral galaxy? check all that apply. is shaped like a pinwheel has no new star formation contains a lot of gas and dust is smaller than other types of galaxies has sites of active star formation within its arms
It is shaped like a pinwheel describing a spiral galaxy. A flat, rotating disk containing stars, gas, and dust, as well as a central concentration of stars known as the bulge, makes up most spiral galaxies.
What is a spiral galaxy?Spiral galaxies are a type of galaxy first described by Edwin Hubble are part of the Hubble sequence.
A flat, rotating disk containing stars, gas, and dust, as well as a central concentration of stars known as the bulge, makes up most spiral galaxies.
Many of these are surrounded by a fainter halo of stars, many of which are found in globular clusters.
The Pinwheel Galaxy is a spiral galaxy located approximately 21 million light-years from Earth. M101 is the name given to this swirling galaxy by scientists.
In the Northern Hemisphere, it can be found in the constellation Ursa Major, also known as the "Big Dipper." Binoculars or a small telescope can be used to see if the sky is clear and dark.
Hence it is shaped like a pinwheel describing a spiral galaxy.
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please help i really need it right now
Try the suggested option, all the details are in the attachment.
Explanation:
1) to calculate the moles of CCl₄;
2) to calculate the moles of HF;
3) to calculate the mass of CCl₂F₂;
4) to calculate the mass of ureacted HF.
Spring compressed 10cm by 100N force and held in place with Pin. Pin is pulled and block is pushed Up the incline. Uk(coefficient of kinetic energy)=. 39
Determine the speed of block after the Spring extends forward 7cm,
Determine the height at which the block will stop moving
Determine the length of the incline such that the leading edge of the block is stopped when the block reaches the end of the incline.
The compression of 10 cm by a 100 N force on the plane that has a
coefficient of friction of 0.39 give the following values.
The velocity of the block after the Spring extends 7 cm is approximately 1.73 m/sThe height at which the block stops rising is approximately 1.1415 mThe length of the incline is approximately 1.536 mHow can the velocity and height of the block be calculated?Mass of the block, m = 3 kg
[tex]Spring \ constant, K = \dfrac{100 \, N}{0.1 \, m} = \mathbf{ 1000\, N/m}[/tex]
Coefficient of kinetic friction, [tex]\mu_k[/tex] = 0.39
Therefore, we have;
Friction force = [tex]\mathbf{\mu_k}[/tex]·m·g·cos(θ)
Which gives;
Friction force = 0.39 × 3 × 9.81 × cos(48°) ≈ 7.68
Work done by the motion of the block, W ≈ 7.68 × d
The work done = The kinetic energy of the block, which gives;
[tex]\mathbf{\dfrac{1}{2} \times k \cdot x^2 }= 7.68 \cdot d[/tex]
The initial kinetic energy in the spring is found as follows;
K.E. = 0.5 × 1000 N/m × (0.1 m)² = 5 J
The initial velocity of the block is therefore;
5 = 0.5·m·v²
v₁ = √(2 × 5 ÷ 3) ≈ 1.83
Work done by the motion of the block, W ≈ 7.68 N × 0.07 m ≈ 0.5376 J
Chane in kinetic energy, ΔK.E. = Work done
ΔK.E. = 0.5 × 3 × (v₁² - v₂²)
Which gives;
ΔK.E. = 0.5 × 3 × (1.83² - v₂²) = 0.5376
Which gives;
The velocity of the block after the Spring extends 7 cm, v₂ ≈ 1.73 m/sThe height at which the block will stop moving, h, is given as follows;
[tex]At \ the \ maximum \ height, \ h, \ we \ have ; \ \dfrac{1}{2} \times 1000 \times 0.1^2 = 7.68 \times x[/tex]
Which gives;
[tex]Length \ of \ the \ incline \ at \ maximum \ height, \ x_{max} =\dfrac{ 7.68 }{ \dfrac{1}{2} \times 1000 \times 0.1^2 } \approx 1.536[/tex]
The distance up the inclined, the block rises, at maximum height is therefore;
[tex]x_{max}[/tex] ≈ 1.536 m
Therefore;
h = 1.536 × sin(48°) ≈ 1.1415
The height at which the block stops rising, h ≈ 1.1415 mFrom the above solution for the height, the length of the incline is he
distance along the incline at maximum height which is therefore;
Length of the incline, [tex]x_{max}[/tex] = 1.536 mLearn more about conservation of energy here:
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The dehydration butanol on alumina is carried out over a silica-alumina catalyst at 680 K.
CH3CH2CH2OH →CH3CH = CHCH3 + H2O
The rate law iswith k = 0. 054 mol/gcat·h·atm and KBu = 0. 32 atm^–1. Pure butanol enters a thin-tubed, packed-bed reactor at a molar flow rate of 50 kmol/hr and a pressure of 10 atm (1013·kPa).
Required:
a. What PBR catalyst weight is necessary to achieve 80% conversion in the absence of pressure drop?
b. What "fluidized CSTR" catalyst weight is necessary to achieve 80% conversio?
A) The PBR catalyst weight that is required to achieve 80% conversion in the absence of pressure drop is : 370 mg
B) The fluidized CSTR catalyst weight necessary to achieve 80% conversion is : 995.025 g
A) Determine the PBR catalyst weightTo calculate the PBR catalyst weight required to achieve 80% conversion in the absence of pressure drop we will apply the equation below
w = [tex]\frac{V_{o} }{KC_{ao}(1/x - 1 ) }[/tex] ---- ( 1 )
insert values into equation ( 1 )
w = [tex]\frac{50 kmol}{0.54 * 10 (\frac{1}{0.8}) * 1 }[/tex]
PBR catalyst weight ( w ) = 370 mg
B) Determine the fluidized CSTR catalyst weight necessary to achieve 80% conversion
applying the equation below
W = [tex]\frac{Fbwx}{-r'Bu}[/tex]
= [tex]\frac{50kmol/r * 0.8}{0.042mol/gcat.h}[/tex]
= 995.025 gcat
Hence we can conclude that The PBR catalyst weight that is required to achieve 80% conversion in the absence of pressure drop is : 370 mg The fluidized CSTR catalyst weight necessary to achieve 80% conversion is : 995.025 g.
Learn more about Dehydration of butanol : https://brainly.com/question/7140413
What causes competition among organisms?
Answer:
Whats up Bmw,
The organisms is caused when both the organisms or species are harmed, which is limited supply of at least one resource from food or even water used by both can be a factor.
Explanation:
Hope I helped you, and let me know if you need help on anything else :p
Answer:
Limited resources lead to competition between organisms
Explanation:
Competition is a negative interaction that occurs among organisms whenever two or more organisms require the same limited resource. All organisms require resources to grow, reproduce, and survive. However, organisms cannot acquire a resource when other organisms consume or defend that resource.
The marble in the figure to the right has a mass of 3.75 g. When placed in a graduated cylinder, as pictured, the water level changes from 25 mL to 28 mL. What is the density of the marble?
Answer:
The answer is 1.25 g/mLExplanation:
The density of a substance can be found by using the formula
[tex]density = \frac{mass}{volume} \\[/tex]
From the question
mass = 3.75 g
volume = final volume of water - initial volume of water
volume = 28 - 25 = 3 mL
We have
[tex]density = \frac{3.75}{3} \\ [/tex]
We have the final answer as
1.25 g/mLHope this helps you
why acceleration is a derived unit?
The acceleration is derived from the some other quantities like change in velocity / time take . If we see carefully that formula of acceleration you find that it is basically derived from fundamental quantities therefore acceleration is called a derived quantities.
When someone throws a ball, the action force is the person pushing on the ball. What is the reaction force? the ball pushing on the person the ball pushing against air the ball being pulled toward the ground the ball being pulled away from the person
Answer:
A
Explanation:
the ball pushing on the person
what are the invisible forces of nature
Answer:
Gravity, Friction, Air resistance, magnetism, static electricity
Explanation:
Answer:
gravity friction air resistant are a few
(e) The National Grid supplied a house with 18 000 000 J of energy. in 1 hour. What was the average current supplied to the house during that hour? Write any equations that you use.
Answer:
Explanation:
4.0/5
10
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Electrical power = (voltage) x (current)
Electrical energy = (power) x (time)
Combine those definitions:
Energy = (voltage) x (current) x (time)
Divide each side by (voltage x time), and we have
Current = Energy / (voltage x time)
You told us that
Energy = 1.8 x 10⁷ joules
Time = 1 hour = 3,600 seconds
so we have
Current = (1.8 x 10⁷) / (voltage x 3,600).
If you live in the US, Canada, or Mexico, your voltage is 120 volts.
Current = (1.8 x 10⁷) / (120 x 3,600) = 41-2/3 Amperes
If you live practically anywhere else in the world, your voltage is 240 volts.
Current = (1.8 x 10⁷) / (240 x 3,600) = 20-5/6 Amperes.
what two elements take up the most space in the universe
Answer:
helium and hydrogen
Explanation:
How do you calculate the total current of a parallel circuit?
Answer:
The total current in the circuit is the current that travels thru a single conductor that connects to the parallel circuit (current from a electromotive source, etc.)
I = I1 + I2 + I3 ...... In
If n items are in parallel with another, then I is the total current passing thru these items
Convert 0k temperature into Celsius fahrenhet
and Reumer scale.
Answer:
-273.15 celcius
−218.52 Réaumur
Explanation:
273. 15 kelvin = 0 degrees celcius
C + 273.15 =k
08. Degrees celcius = 1 Réaumur
C x 0.8 = rea
What indicates that an area in the Northern Hemisphere is experiencing summer?
O The Sun is at its lowest point in the sky,
O The Sun is directly over Earth's north end,
The Northern Hemisphere receives fewer direct rays from the Sun.
The northern end of Earth's axis is tilted away from the Sun.
Answer:
b
Explanation:
Answer:
its b, the sun is directly over earths north end
Explanation:
Frictional force increases with the increase in the _______________ of the surface.
1 point
Smoothness
Roughness
Softness
None of the above
Answer:
Frictional force increases with the increase in the roughness of the surface.
Explanation:
You will see that the rougher the surface, the greater the wear and tear.
What are the Planets in order and how far away are they from the Sun?
9
How can you prove that air has weight
Answer:
Air does, in fact, have weight, and here's a simple way you can prove it. You'll need two identical balloons, a string, and a dowel. Attach the uninflated balloons to either end of the dowel. Attach the string to the center of the dowel and then hang it from something.
Explanation:
describe momentum with examples
Answer:
Momentum is defined as the amount of motion occurring in something that is moving, or the force that drives something forward to keep it moving. An example of momentum is how quickly a car is moving down a hill.
Dennis the Menace uses his slingshot to shoot a small rock at his neighbor's flowerpots. The rock travels a distance of 12.5 cm from the point at which he pulls it back to the point at which it leaves the slingshot. It leaves the slingshot at a velocity of 6.24 m/s. Find the average acceleration of the rock.
Answer:
[tex]a=155.750\ m/s^2[/tex]
Explanation:
It is given that,
A small rock is shoot at Dennis' neighbor's flowerpots. The rock travels a distance of 12.5 cm from the point at which he pulls it back to the point at which it leaves the slingshot.
Final velocity of the rock, v = 6.24 m/s
The initial velocity of the rock, u = 0 (as it was at rest)
Let a is the acceleration of the rock. It can be calculated using the equation of kinematics as follows :
[tex]v^2-u^2=2ad\\\\\text{Put u = 0 }\\\\v^2=2ad\\\\a=\dfrac{v^2}{2d}\\\\a=\dfrac{(6.24)^2}{2\times 12.5\times 10^{-2}}\\\\a=155.750\ m/s^2[/tex]
So, the average acceleration of the rock is [tex]155.750\ m/s^2[/tex].
what is Law of gravitation?
universal gravitation is usually started as the particle extracts every other particle in the universe with the force which is directly proportional to the product of masses and inversely proportional to the square of the distance between their centres.
please mark my ans as BRAIN LISTIt's not D
10 Select the correct answer.
A stability ball can be used in yoga to do which of the following?
A. Provide support
В. Make a move more challenging
C. Make a move easier
D. All of the above
what is the ke of a 800 tonnes train travelling at a speed of 108 km/h note 1 tonne =1000 kg
Which events may occur when ocean salinity increases? check all that apply. mass of water increases freezing point of water decreases sunlight in deeper locations decreases buoyancy of objects in the water increases amount of dissolved gases in water increases
The mass of water increases, the freezing point of water decreases. and the buoyancy of objects in the water increases may occur when the ocean sanity increases.
What is ocean sanity?Seawater is salty due to a variety of substances. The majority of them arrive via rivers, which bring chemicals dissolved from rock and soil. The most common is sodium chloride, also known as salt.
The most popular approach to quantify salinity is to count the amount of salt in 1,000 g of water, which is referred to as ppt. The majority of the ocean has a salinity of 34 to 36 parts per thousand.
Salinity makes water colder and denser by lowering its temperature. The chilly water sinks to the ocean's depths. Slow currents carry it throughout the marine basins.
Because the items have a lower density, they flow across the water's surface. As a result, the buoyancy of items in water improves.
So the events that may occur when ocean salinity increases will be;
1)The mass of water increases.
2) Freezing point of water decreases.
3) buoyancy of objects in the water increases.
Hence the masses of water increase, the freezing point of water decreases. and the buoyancy of objects in the water increases may occur when the ocean sanity increases.
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Two positive .00008 C charges are set 2.0 m apart as shown.
The direction of the electric force on charge 2 is to the
Cannot be determined
Down
Left
Up
Right
The direction of the electrostatic force on the second charge (charge 2) will be away from the first charge (charge 1).
Electrostatic force between the two chargesThe electrostatic force between the two charges is determined with Coulomb's law;
F = kq²/r²
F = (9 x 10⁹ x 0.0008²)/(2)²
F = 1,440 N
Direction of the electrostatic forceSince the two charges are the same (positive), the direction of the electrostatic force on the second charge (charge 2) will be away from the first charge (charge 1).
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I just wanna know if I’m correct and how?
Answer:
i think that you are right becuase when the line goes down it goes back up and passes 10 and goes down and passes 20 and 20 is 2 10's and 10-10 is 0
Explanation:
i think your right
A student hypothesizes that the rate of a chemical reaction will increase as the concentration of the reactants increases. To test his hypothesis, the student performs an investigation. Which are the independent and the dependent variables in the investigation?
Answer:
independent variable- concentration of reactants
dependent variable- rate of reaction
Explanation:
A dependent variable is a variable that is placed under test and is measured under the process of a scientific experiment.
An independent variable is a variable that undergoes the change in the experiment performed. This change is done with respect to test the efforts that are observed on the dependent variable.
In the given hypothesis, 'concentration of reactants' is the independent variable and 'rate of reaction' is the dependent variable
How many oxygen (O) atoms are in a molecule of Cg H,O3?
A. 1
B. 3
C. 10
D. 4
Answer:
B. 3
Explanation:
A rock is dropped from a cliff that is 80 m above the ground. What is the velocity of the rock when it hits the ground? (hint: acceleration due to gravity g = 9.81 m/s2)
Answer:
45.1 m/s
Explanation:
use the equation v = u + at substitute the values v = 0 + 9.8×4.6 v = 45.08 round to about 3 s.f v = 45.1 m/s I do apologize if I'm incorrect.
Love, which can’t be observed or measured directly, is an example of a psychological construct.
Please select the best answer from the choices provided
T
F
Answer:
f
Explanation: