Answers
Related Questions
SOME ONE PLZ HELP WILL GIVE THE BRAINIEST
Answers
Answer:
I. 90%
II. 60 MW
Explanation:
From the question given above, the following data were obtained:
Power input = 600 MW
Power output = 540 MW
I. Determination of the efficiency.
Power input = 600 MW
Power output = 540 MW
Efficiency =?
Efficiency = output / input × 100
Efficiency = 540 / 600 × 100
Efficiency = 90%
II. Determination of the power wasted by the pump.
Power input = 600 MW
Power output = 540 MW
Power wasted =?
Power wasted = Power input – Power output
Power wasted = 600 – 540
Power wasted = 60 MW
You drop a rock down a well that is 31 m deep. How long does it take the rock
to hit the bottom of the well?
A. 1.9 s
B. 2.7 s
C. 6.3 s
D. 2.5 s
Answers
Se usa una bombona de He para inflar globos, de volumen 15L con una presión de 200 atm. Si los globos tienen un volumen de 1.5L y presión de 770mmHg. ¿Cuántos globos se pueden llenar?
Answers
Answer:
La cantidad de globos llenos es de aproximadamente 1.974 globos
Explanation:
Los parámetros dados son;
El gas utilizado para inflar el globo = Él
El volumen del gas He, V₁ = 15 L
La presión del gas He, P₁ = 200 atm = 20,265,000 Pa
El volumen de cada globo = 1,5 L
La presión del He dentro del globo, P₂ = 770 mmHg = 102,641 Pa
Sea 'V₂', que represente el volumen total que el gas ocupa en todos los globos, y 'x', que represente el número de globos;
Por lo tanto, tenemos;
1,5 · x = V₂
Según la ley de Boyle, tenemos;
P₁ · V₁ = P₂ · V₂
∴ V₂ = P₁ · V₁ / (P₂)
Al introducir los valores conocidos, obtenemos;
V₂ = 20,265,000 Pa × 15 L / (102,641 Pa) = 2,961.53548 L
1,5 L × x = V₂
∴ 1,5 L × x = 2,961,53548 L
x = 2,961.53548 L / (1.5 L) = 1,974.35699 redondeamos hacia abajo para obtener un número entero de globos de la siguiente manera;
El número de globos, x ≈ 1,974 globos.
How much is the pressure exerted at a point where a ball- pointed pen of area 1mm 2 is pushed against the paper with a force of 24 N
Answers
Answer:
Please find the attached pdf
Explanation:
When a pressure is applied to an object, the volume of the object:
a. stays the same
b. increases
c. decreases
Answers
Answer:
C because at higher altitude the air density becomes smaller
PLEASE HELP I'LL MARK BRAINLIEST
Answers
Answer:
B
Explanation:
Please write ONE complete sentence describing the relationship between Kinetic Energy and Gravitational Potential Energy in a system
where energy is conserved:
Answers
Answer:
Explanation:
The sum of kinetic and potential energy is the mechanical energy of the system. Assuming the energy of the system is conserved, which it is in your case, then the initial mechanical energy will equal the final mechanical energy. This relationship is very useful in mechanics.
I need help immediately and thank you of if you answer the question
Answers
Answer:
c. Position C
Explanation:
As the magnetic force is the strongest at the end of the poles and it decreases when it comes to its centre.
an apple falls from the top of the tree and takes 2 secs to hit the ground.
how far did the apple fall?
calculate the velocity of the apple just before it hits the ground.
Answers
The gravitational potential energy decreases and the kinetic energy increases. The gravitational potential energy is transformed into kinetic energy as the ball rolls down the ramp.
A. The gravitational potential energy decreases and the kinetic energy increases. The gravitational potential energy is transformed into kinetic energy as the ball rolls down the ramp.
B. The gravitational potential energy decreases and the kinetic energy increases.As soon as the ball starts moving it no longer has gravitational potential energy; it has only kinetic energy.
C. The kinetic energy and and gravitational potential energy both decrease. Both forms of energy are used up as the ball moves and are not transformed into any other form of energy.
D. The gravitational potential energy and the kinetic energy both stay the same. One form of energy cannot be transformed into a different form of energy.
Answers
Answer:
The gravitational potential energy decreases and the kinetic energy increases. The gravitational potential energy is transformed into kinetic energy as the ball rolls down the ramp.
Explanation:
The gravitational potential energy is the energy due to the position of a body above the ground.
Kinetic energy is the energy due to the motion of a body.
From the law of conservation of energy "energy is neither created nor destroyed but transformed from one form to another".
As the ball rolls down the ramp, the potential energy at the height is converted to kinetic energy.
Making a forecast of what will happen in the future based on past experience or evidence is called
a.
observing.
c.
predicting.
b.
inferring.
d.
classifying.
Answers
Answer: c
Explanation:
A una temperatura de 329°K una placa de aluminio tiene un área de 15 m2, si su temperatura disminuye hasta 288°K; ¿Cuál es el valor de su área final?
Answers
Answer:
El área final de la placa de aluminio es 14.971 metros cuadrados.
Explanation:
Para pequeñas deformaciones, la expresión para la dilatación de área es la siguiente:
[tex]A_{f} = A_{o} \cdot [1+2\cdot \alpha \cdot (T_{f}-T_{o})][/tex] (1)
Donde:
[tex]A_{o}[/tex], [tex]A_{f}[/tex] - Áreas inicial y final de la placa, medidas en metros cuadrados.
[tex]\alpha[/tex] - Coeficiente de expansión lineal, medido en [tex]\frac{1}{K}[/tex].
[tex]T_{o}[/tex], [tex]T_{f}[/tex] - Temperaturas inicial y final de la placa, medidas en Kelvin.
Si sabemos que [tex]A_{o} = 15\,m^{2}[/tex], [tex]\alpha = 23\times 10^{-6}\,\frac{1}{K}[/tex], [tex]T_{o} = 329\,K[/tex] y [tex]T_{f} = 288\,K[/tex], entonces el área final de la placa es:
[tex]A_{f} = (15\,m^{2})\cdot \left[1+2\cdot \left(23\times 10^{-6}\,\frac{1}{K} \right)\cdot (288\,K-329\,K)\right][/tex]
[tex]A_{f} = 14.971\,m^{2}[/tex]
El área final de la placa de aluminio es 14.971 metros cuadrados.
What is the density of an object with the mass of 125g and a volume of 176 m
Answers
Answer:
the density is mass over volume, so you divide 125g over 25 cm3, giving a result of 5 g/cm3
Answer:
The density is mass over volume
so you divide 125g over 25 cm3
giving a result of 5 g/cm3
you welcome have a good day!
Help me with this please everyone e
Answers
Answer:
false I wouldn't say its a consequence.
pls help brainliest if correct
Answers
Hmm lets see.. I think its
Mechanical---->Mechanical---->Electrical
So mechanical from the water, Then mechanical again from the wheel then through the wire which is electrical and it turns the fan on.
When the chemical name of a compound is being written, the subscripts will determine the symbols. elements. prefixes. suffixes.When the chemical name of a compound is being written, the subscripts will determine the symbols. elements. prefixes. suffixes.
Answers
Answer:
C. Prefixes
Explanation:
I took the quiz on edge
Answer:
C is correcting taking test now
Explanation:
is 468km per minute describing speed or velocity
Answers
Which of the following was NOT a department in Washington's first cabinet?
A. Secretary of State
B. Secretary of Homeland Security
C. Secretary of War
D. Secretary of Treasury
Answers
Answer:
I believe its C: Secretary of War. I hope this helped :)
Explanation:
Secretary of Homeland Security was not a department in Washington's first cabinet. So, the correct option is B.
What is Washington's cabinet?George Washington created the nation's first cabinet, made up of the president's most trusted advisers, where advisers advise the president on laws, taxes, foreign affairs, defense, and other important issues on how to govern the United States.
George Washington's first cabinet was consists of attorney and postmaster generals and secretaries of state, treasury, and war. This cabinets included four original members which are as follows: Secretary of State Thomas Jefferson, Secretary of Treasury Alexander Hamilton, Secretary of War Henry Knox, and Attorney General Edmund Randolph.
Therefore, the correct option is B.
Learn more about Washington's cabinet, here:
https://brainly.com/question/9316770
#SPJ6
Can someone help me with this question
Answers
Answer:
extrusive igneous rock
Please please help me with those questions please please help me
Answers
Explanation:
a) E= fs
b) 2E = mv²
c) E= Mc ²
What is the metric system of 1.0km to mm
Answers
Answer:
1 kilometer is equivalent to 1,000,000 <(million) millimeters
Help ASAP
Frank uses a bowling ball to demonstrate how energy can cause changes. Which
of the following actions would NOT demonstrate a change caused by applying
energy to the ball?
O He spins the bowling ball with one hand
O He rolls the bowling ball across the floor
O He holds the bowling ball in both hands
He lifts the bowling ball to place it on a shelf.
Answers
Answer:
he holds the ball in both hands
Explanation:
he's not moving the ball
Why does a slinky wave eventually stop? Where did the energy go?
Answers
Answer:
Grades ... gravity affects them and the potential energy is converted into kinetic energy. Watching a Slinky move down the stairs or vibrating while ... and kinetic energy, and finally into sound waves.
Explanation:
Answer:
A wave as seen above will start losing energy by transferring it to kinetic and rotational energy at the shallow bottom including sand transfers, which finally will become heat (extra kinetic energy). ... In the end all energy will end up as a higher temperature in the region and ground than if the ocean were calm.
Explanation:
plz mark me has brainlist
Why do farmers need to use strategies like crop rotation?
Answers
Answer:
Crops drain the soil of nutrients
Explanation:
i took the test:) yw
Study the image below.
A straw in a glass of water. The straw appear to be broken and shifted at the top of the water.
The straw appears to "bend" because of
Answers
Answer:
Study the image below.
A straw in a glass of water. The straw appear to be broken and shifted at the top of the water.
The straw appears to "bend" because of
✔ refraction.
Explanation:
Study the image below.
A straw in a glass of water. The straw appear to be broken and shifted at the top of the water.
The straw appears to "bend" because of
✔Study the image below.
A straw in a glass of water. The straw appear to be broken and shifted at the top of the water.
The straw appears to "bend" because of
✔. refraction
.
Ep = mxgx h. Re-arrange to give an equation for:
a) The mass m.
b) The gravitational field strength g.
c) The height h.
Answers
Answer:
Ep=mxgxh.
a) m=ep/gxh
b) g=ep/m/h
c)h=ep/mxg
Answer:
Ep=mgh
Ep/gh=mgh/gh
Ep/gh=m
Directed Reading for Overview
Content Mastery
Forces and Newton's Laws
Directions: Complete the concept map using the terms listed below.
pushes and pulls
Newton's Laws
inertia
acceleration
unbalanced
mass
pairs
gravity
1.
and
forces
such as
when they are
7.
2.
they
generate
which is a
force of
attraction
motion
between two
objects with
can be measure by
4.
8.
3.
describes
which is a
measure
of
relates force,
mass and
describes
forces in
5.
6.
Answers
how many electrons does a neutral atom of the element oxygen have?
Answers
Answer:
8 electrons
Explanation:
Now you can figure out how many electrons, protons and neutrons Oxygen has: Atomic number (which is always the smaller of the two numbers) is 8. Hence 8 protons. Because the atom is neutral, there are also 8 electrons.
Why does a ball not bounce back up to its original height?
Answers
Answer:
Gravity
Explanation:
Please help!!!
What do all of the inventors discussed in this lesson have in common?
All of the inventors can be characterized as problem-solvers.
O All of the inventors created new things as children.
All of the inventors used engineering principles to create new things.
O All of the inventors needed mathematics principles to formulate solutions.
Answers
Answer:
All of the inventors can be characterized as problem-solvers.
Explanation:
Took the practice
Answer:
All of the inventors can be characterized as problem-solvers.
Explanation:
