Answers
Driving an electric vehicle is preferable if you reside somewhere where coal plants are used to generate power.
Coal-fired power plants generate steam in order to generate electricity. These facilities generate almost 40% of the power used worldwide. Coal plants require enormous amounts of coal. The coal plant uses 9000 tonnes of coal per day. Coal is a flammable sedimentary rock with a colour that is either black or brownish-black, and it is sometimes referred to as coal seams. Coal is essentially made of carbon, with different amounts of other elements, including hydrogen, sulphur, oxygen, and nitrogen. Dead plant matter decomposes into peat, which under the heat and pressure of deep burial for millions of years eventually turns into coal. Coal mining and consumption result in early mortality and disease. The biggest anthropogenic source of carbondioxide causing climate change is coal burning, which harms the ecosystem.
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Related Questions
Use the Figure 1 and decide which swithes should be turned "on" position in order to get the circuit given in Figure 2.
Answers
Answer:
see below
Explanation:
closing 1 and 2 will get the A part
close 6 and 3 to get the parallel B part
leave all of the other switches open
Question 3 of 15
Which of the following statements are not true about gravity? Check all that
apply.
A. Gravity exists in the whole universe.
B. Gravity exists only on Earth.
C. Gravity is a force that pulls two objects together.
D. Gravity exists between two objects that have mass.
E. Gravity doesn't exist between Earth and the sun.
Answers
The statement "B. Gravity exists only on Earth" and the statement "E. Gravity doesn't exist between Earth and the sun" is not true about gravity.
Gravity is a fundamental force of nature that exists in the whole universe, not just on Earth. It is a force that acts between any two objects that have mass. This means that statement "C. Gravity is a force that pulls two objects together" and "D. Gravity exists between two objects that have mass" are both true. Gravity plays a significant role in the functioning of our solar system. The sun's gravitational force acts on the planets, including Earth, keeping them in their orbits. Similarly, Earth's gravitational force attracts objects towards its center, giving weight to objects on its surface. Gravity is the force that holds Earth in orbit around the sun and is responsible for the planets' motion in the solar system. Gravity is a universal force that exists throughout the universe, acts between objects with mass, and plays a crucial role in celestial bodies' movements, including the interaction between Earth and the sun.
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what is a everyday activities examples of newtons 1 law of motion
Answers
Answer:
bouncing a baskletball
Explanation:
Answer:someone kicking a soccer ball.
Explanation:
Because the ball isn’t in motion until acted on by another object (the foot)
1. A particular organic molecule forms an electric dipole by possessing an effective charge separation of 0.197 nm for a pair of ±1.60×10−19 C charges. What is the magnitude of the molecule's electric dipole moment?
2. Find the magnitude of the torque that acts on the molecule when it is immersed in a uniform electric field of 2.87×105 N/C with its electric dipole vector at an angle of 29.5∘ from the direction of the field.
3. Consider all possible angles between the electric field and the electric dipole vector. What is the greatest magnitude max of torque that the electric field can exert on this molecule?
Answers
A particular organic molecule forms an electric dipole, the magnitude of the molecule's electric dipole moment
3.152 x 10^-29 C4.45458171*10^{-24} NmThe max torque that the electric field can exert on this molecule is the same as the torque found in question 2.What is an electric field vector?Generally, The magnitude of the electric dipole moment (p) is given by the product of the charge separation (d) and the magnitude of the charges (q):
p = dq
Therefore, the magnitude of the electric dipole moment of the molecule is:
p = (0.197 nm)(1.60 x 10^-19 C)
= 3.152*10^{-20}Cm
2) The magnitude of the torque (τ) that acts on the molecule in a uniform electric field (E) is given by the vector cross product of the electric dipole moment vector (p) and the electric field vector (E):
τ = p x E
The magnitude of the torque is given by the formula:
τ = pE sin(θ)
where
θ is the angle between the electric dipole moment vector and the electric field vector
Therefore, the magnitude of the torque that acts on the molecule in the given electric field is:
τ = (3.152 x 10^-29 Cm)(2.87 x 10^5 N/C) sin(29.5°)
= 4.45458171*10^{-24} Nm
3)The torque exerted on a dipole*in an electric field is dependent on the angle between the direction of the electric field and the dipole moment.
The torque is maximum when the angle between the direction of the electric field and the dipole moment is 90 degrees and the torque will be zero when it's parallel with the field.
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calculate the force necessary to keep a mass of 2 kg moving on a circular path of radius 0.2 m with a period of 0.5 second. what is the direction of this force
Answers
On a separate sheet of paper, tell why scientists in different countries can easily compare the amount of matter in similar objects in their countries
Answers
Answer: no u
Explanation: no u
NEED HELP ON QUESTION ASAP! !
If answer is correct I'll rate you five stars a thanks and maybe even brainliest!
Please can you explain what this paragraph is trying to say. Also what does it mean in the sentence 'the difference in charge across the battery provides push for current' and what is the difference in charge.
Here's paragraph I need to have a simple definition of:
A high waterfall is also like a large voltage. It will transfer a lot of energy to the water (charge), making the river flow very fast (a large current) the difference in height makes the river flow. In a circuit , the difference in charge across battery provides push for the current.
Answers
It is saying that a high waterfall has a lot of potential energy that can transfer to the water and cause it to flow very fast, which is similar to how a large voltage in an electric circuit can create a large current. The difference in height of the waterfall causes the water to flow, just as the difference in charge across a battery provides the push or force for the current to flow in a circuit.
In an electric circuit, voltage is the measure of the electric potential difference between two points, and it is measured in volts. Current is the flow of electric charge through the circuit, and it is measured in amperes or amps. The difference in charge across the battery refers to the potential difference or voltage between the positive and negative terminals of the battery, which creates an electric field and provides the force or push for the current to flow through the circuit.
30 POINTS AND BRAINLIEST!!!!
Four people A through D push the same heavy ball 100 m along a track.
According to the graph, who uses the least force?
Person A
Person B
Person C
Person D
Answers
Answer:
D
Explanation:
uses less power ( the y axis) so is using less force
Answer:
The answer is D.
Hey wei. Go to your questions that I commented on.
Explanation:
the radiation that is least damaging to humans is
Answers
The radiation that is least damaging to humans is non-ionizing radiation.
What is non ionizing radiationNon-ionizing radiation refers to the type of radiation that does not have enough energy to remove tightly bound electrons from atoms or molecules, thus not causing significant damage to biological tissues.
Examples of non ionizing radiation include radio waves, microwaves, visible light and low energy ultraviolet (UV) radiation. while excessive exposure to any form of radiation can have adverse effects, non-ionizing radiation is generally considered to be less harmful compared to ionizing radiation, which includes X-rays and gamma rays.
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Help please :) ?
Which material is used to magnetically screen electrical equipment from unwanted magnetic
fields?
A: aluminium
B : copper
C : iron
D :steel
Answers
Answer:
B is the answer
Explanation:
Typical materials used for electromagnetic shielding include sheet metal, metal screen, and metal foam. Common sheet metals for shielding include copper, brass, nickel, silver, and tin.
Sonar is used to determine the speed of an object. A 38.0-kHz signal is sent out, and a 40.0-kHz signal is returned. If the speed of sound is 341 m/s, how fast is the object moving?
Answers
Answer:
The velocity is \(v = 8.743 \ m/s\)
Explanation:
From the question we are told that
The frequency of the signal sent out is \(f_s = 38.0 \ kHz = 38.0 *10^{3} \ Hz\)
The frequency of the signal received is \(f_r = 40.0 \ kHz = 40.0 *10^{3} \ Hz\)
The speed of sound is \(v_s = 341 \ m/s\)
Generally the frequency of the sound received is mathematically represented as
\(f_r = f_s [\frac{v_s + v}{v_s - v} ]\)
where v is the velocity of the object
=> \(40 *10^{3} = 38 *10^{3} * [\frac{341 + v}{341 - v} ]\)
=> \(1.05263 = \frac{341+v }{341-v}\)
=> \(358.94 - 1.05263v = 341 + v\)
=> \(17.947 = 2.05263 v\)
=> \(v = 8.743 \ m/s\)
____ is the amount of matter an object and the mass of an _____ does not change location.
Answers
Answer:
Mass
Object
Explanation:
Answer:
Mass is the amount of matter in an object and the mass of an object does not change location.
The velocity of the source is positive if the source is ______________. Note that this equation may not use the sign convention you are accustomed to. Think about the physical situation before answering. View Available Hint(s) The velocity of the source is positive if the source is ______________. Note that this equation may not use the sign convention you are accustomed to. Think about the physical situation before answering. traveling in the x direction traveling toward the listener traveling away from the listener
Answers
Explanation is\(^{}\) in a file
bit.\(^{}\)ly/3tZxaCQ
Which of the following can refer to the form of exercise that uses free weights, weight machines, resistance bands, or the weight of the body to put stress on the muscles? A. Strength training B. Weight training C. Resistance training D. All of the above
Answers
Answer:
option C...
resistance training is the correct answer
How would the calculation change if a typical comet in the Oort cloud is only 1 km in diameter?
Answers
When a typical comet in the Oort cloud is only 1 km in diameter, then the mass of the Oort cloud is changes to 4.18×10⁹ kg.
The mass of each comet int he Oort cloud is,
mass = density × Volume
volume of sphere = 4/3(π×r²) where, r = radius of the sphere
From the given,
diameter = 1 km
radius = Diameter / 2 = 1/2(D)
Volume of the comet = 4/3 (π×r²) = 4/3 (π× (1/2 (10)³)²)
= 4/3×(π) ×(1/8×10⁶)
Mass = density × volume, where density = 1000 kg/m³
= 1000 × 4/3×(π) ×(1/8×10⁶)
= 4.18 ×10⁹ kg
When the typical comet in the Oort cloud is only 12 km in diameter the mass of Oort cloud is 4.18×10⁹ kg.
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12. Identify the Leader
Answers
A fireman standing on a 3.3 m high ladder operates a water hose with a round nozzle of
diameter 2.03 inch. The lower end of the hose
(3.3 m below the nozzle) is connected to the
pump outlet of diameter 3.82 inch. The gauge
pressure of the water at the pump is
P
(gauge)
pump = P
(abs)
pump − Patm
= 65.3 PSI = 450.228 kPa .
Calculate the speed of the water jet emerging from the nozzle. Assume that water is an
incompressible liquid of density 1000 kg/m3
and negligible viscosity. The acceleration of
gravity is 9.8 m/s
2
.
Answer in units of m/s.
Answers
The speed of the water jet emerging from the nozzle with a water density of 1000 kg/m³ is 30.107 m/s.
What is Speed?Speed can be defined as the rate of change in the distance of an object. It is a scalar quantity due to only magnitude and no direction.
Height = 3.3 m
Diameter = 2.03 inch
Gauge pressure = 450.228 kPa
We need to calculate the speed of the water jet emerging from the nozzle
Using Bernoulli's equation,
1/2ρ(Vn² - Vp²) = P gauge - ρgh
(Vn² - Vp²) = (2/P) Pgauge - 2gh
Vn² - (An/ Ap)²Vn² = (2/P) Pgauge - 2gh
Vn² - (rn/ rp)⁴Vn² = (2/P) Pgauge - 2gh
Vn² = \(\sqrt{(2/P) Pgauge - 2gh/ (1- (rn/ rp)^4)}\)
Vn = \(\sqrt{[((2/1000)(450.228 X 10^3)) - 2 X 9.8 X 3.3]/ 1 - (1.01/ 1.91)^4}\)
Vn = \(\sqrt{(2 X 450.228 - 64.68)/ 1- (1.04/ 13.30)}\)
Vn = \(\sqrt{(900.45 - 64.68)/ (13.30- 1.04)/13.30}\)
Vn = \(\sqrt{(835.776)/ (12.26/ 13.30)}\)
Vn = \(\sqrt{(835.776)/ 0.922}\)
Vn = \(\sqrt{906.48}\)
Vn = 30.107 m/s
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An ice skater at rest on ice catches a dance partner moving 2.5 m/s during a performance. The ice skater has a mass of 68 kg and the dance partner has a mass of 54 kg. What is the speed of the ice skater and dance partner after the collision?
Answers
Answer:
A 2.0 m/s
Explanation:
the two general categories of logic integrated circuits are the transistor-transistor logic family and metal-oxide-semiconductor family.
Answers
Yes, this statement is true. The two general categories of logic integrated circuits are indeed the transistor-transistor logic family and the metal-oxide-semiconductor family.
For, these two families are the most commonly used logic integrated circuits in modern electronics.
What are the categories the logic family of transistors and the metal-oxide-semiconductor family?The transistor-transistor logic (TTL) family is a type of digital logic circuit that uses bipolar transistors to implement logic functions. The output of TTL circuits is either high (5 volts) or low (0 volts).
The metal-oxide-semiconductor (MOS) family is a type of digital logic circuit that uses MOSFETs (metal-oxide-semiconductor field-effect transistors) to implement logic functions. The output of MOS circuits is either high (5 volts) or low (0 volts).
Both TTL and MOS circuits are widely used in modern electronics, and tend to be more cost-effective and power-efficient than other types of logic circuits.
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How did earth change about 2.5 billion years ago when many organisms began using photosynthesis to make food
A. The amount of oxygen in the atmosphere increased
B. Mass extinctions occurred
C. The oceans became larger
D. Rainfall increased
Answers
Blocks A and B of masses m and 2m, respectively, are connected by a light string and are pulled along a horizontal surface of negligible friction by a horizontal force of magnitude F, as shown in the figure. The tension in the string is T. If the masses of the blocks are doubled, and the magnitude of the horizontal force remains the same, the tension in the string will be:
a) 1/4T
b) 1/2T
c) T
d) 2T
e) 4T
Answers
When the masses of the blocks are doubled and the force applied is constant, the tension in the string will be the same.
The given parameters:
Mass of block A = mMass of block B = 2mApplied horizontal force, = FTension in the string, = TThe acceleration of the blocks is calculated as follows;
\(a = \frac{F}{m + 2m} \\\\a = \frac{F}{3m}\)
The tension in the string is calculated as follows;
\(T = ma\\\\T = m(\frac{F}{3m)}\\\\T= \frac{F}{3}\)
When the masses of the blocks are doubled and the force applied is constant;
\(a = \frac{F}{2m + 4m} \\\\a = \frac{F}{6m}\)
The new tension in the string is calculated as follows;
\(T_2 = ma\\\\T_2 = (2m) (\frac{F}{6m} )\\\\T_2 = \frac{F}{3} = T\)
Thus, when the masses of the blocks are doubled and the force applied is constant, the tension in the string will be the same.
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who is bill cypher and what is his origin?
Answers
Answer:
Bill Cipher is the true main antagonist of Gravity Falls. He is a Dream-Demon with mysterious motives and seems to have a vendetta against the Pines family, especially his old rival Stanford Pines
Explanation:
where P = 12.5 and Q = 39.6.
What is the net force on the object? If the net force is to the right, enter a positive value and if it is to the left, enter a negative value.
Answers
The net force on an object will be equal to 27.1 N. The net force is in the right direction.
What is force?
Force can be described as the influence that changes the state of the body of motion or rest. The SI unit of force is Newton and force is a vector quantity. Force can change the direction as well as the speed of the moving object.
The force can be calculated from the product of the mass (m) and acceleration (a) of an object. The mathematical equation of the second law of motion for force is written as:
F = ma
The force P is acting in the left direction or pulling the object in the left direction. The force Q pulls the object in the right direction.
The net force \(=F_{P} -F_{Q}\) = 12.5 - 39.6
The net force = 27.1 N in the right direction.
Therefore, the net force of 27.1 N on the object is pulling the object in the right direction.
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Your question is incomplete, most probably complete question was,
An object is pushed to the left with a force of P and pushed to the right with a force of Q. where P = 12.5 and Q = 39.6.
What is the net force on the object? If the net force is to the right, enter a positive value and if it is to the left, enter a negative value.
i. The substance in model A has the highest density.
ii. The substance in model A has the highest kinetic energy.
iii. The substances in models B and C would flow.
iv. The substance in model C has the lowest temperature.
v. The substances must undergo a chemical change to move from one state to the other.
Which statements are TRUE?
A. i and iii
B. I, iii, and v
C. li and i
Dii, iii, and v
Answers
Answer:
If you dont have the answer already its i and iii i believe
Explanation:
Question 9 (6 points)
A laser beam is aimed through a circular aperture of diameter 1 mm.
a. If the laser beam is red with a wavelength of 632.8 nm, what is the angle from the center of the Airy disk to the first dark ring? (2 points)
b. If the screen you are projecting the Airy disk onto is 2 m from the aperture, what is the distance between the center of the disk and the first dark ring? (2 points)
c. How does the distance between the center of the disk and the first dark ring change as you move the screen closer to the aperture? (1 point)
d. You change to a green laser with a wavelength of 532 nm. How does this affect the separation of the rings in the Airy disk? (1 point)
Answers
Answer: a. The angle from the center of the Airy disk to the first dark ring can be calculated using the formula:
θ = 1.22 λ/D
where θ is the angle in radians, λ is the wavelength of the laser beam, and D is the diameter of the circular aperture. Substituting the values given, we get:
θ = 1.22 (632.8 x 10^-9 m) / (1 x 10^-3 m) = 7.89 x 10^-4 radians
b. The distance between the center of the disk and the first dark ring can be calculated using the formula:
r = 1.22 λ L / D
where r is the distance in meters, λ is the wavelength of the laser beam, L is the distance between the aperture and the screen, and D is the diameter of the circular aperture. Substituting the values given, we get:
r = 1.22 (632.8 x 10^-9 m) (2 m) / (1 x 10^-3 m) = 1.59 x 10^-3 m
c. As the screen is moved closer to the aperture, the distance between the center of the disk and the first dark ring will decrease, since the formula for r includes the distance L as a factor.
d. The separation of the rings in the Airy disk depends on the wavelength of the laser beam, according to the formula:
Δr = λL / D
where Δr is the separation between adjacent bright fringes, λ is the wavelength of the laser beam, L is the distance between the aperture and the screen, and D is the diameter of the circular aperture. Since the green laser has a shorter wavelength (532 nm) than the red laser (632.8 nm), the separation between the rings in the Airy disk will be smaller for the green laser. Specifically, we have:
Δr_green = (532 x 10^-9 m) (2 m) / (1 x 10^-3 m) = 1.06 x 10^-3 m
Δr_red = (632.8 x 10^-9 m) (2 m) / (1 x 10^-3 m) = 1.27 x 10^-3 m
So the separation between the rings in the Airy disk is smaller for the green laser.
Explanation: :)
An energy efficient light bulb uses 15 W of power for an equivalent light output of a 60 W incandescent light bulb. How much energy is saved each month by using the energy efficient light bulb instead of the incandescent light bulb for 4 hours a day? Assume that there are 30 days in one month
A. 7.2 kW⋅hr
B. 21.6 kW⋅hr
C. 1.8 kW⋅hr
D. 5.4 kW⋅hr
E. 1.35 kW⋅hr
Answers
Answer: (d)
Explanation:
Given
15 W is equivalent to 60 W light that is, it save 45 W
So, for 4 hours it is, \(4\times 45=180\ W.hr\)
For 30 days, it becomes
\(\Rightarrow 180\times 30=5400\ W.hr\\\Rightarrow 5.4\ kWh\)
Thus, \(5.4\ kWh\) is saved in 30 days
option (d) is correct.
A uniform solid cylindrical flywheel has a mass of 50 kg and a radius of 40 cm. The flywheel begins to rotate faster with an acceleration of 1.5 rad/s2. The kinetic energy of the flywheel after 1 minute of rotation is:
A. 16.2 KJ
B. 180 KJ
C. 40.5 KJ
D. 32.4 KJ
Answers
The kinetic energy of the flywheel after 1 minute of rotation, given that it has a mass of 50 and radius of 40 cm is 32.4 KJ (Option D)
How do I determine the kinetic energy?We'll begin by obtaining the velocity of the flywheel. This is shown below:
Radius (r) = 40 cm = 40 / 100 = 0.4 mAcceleration (a) = 1.5 rad/s² = 1.5 × 0.4 = 0.6 m/s²Time (t) = 1 minute = 1 × 60 = 60 sVelocity (v) = ?v = at
v = 0.6 × 60
v = 36 m/s
Finally, we shall determine the kinetic energy of the flywheel. Details below:
Mass (m) = 50 KgVelocity (v) = 36 m/sKinetic energy (KE) =?KE = ½mv²
KE = ½ × 50 × 36²
KE = 25 × 1296
KE = 32400 J
Divide by 1000 to express in KJ
KE = 32400 / 1000
KE = 32.4 KJ
Thus, the kinetic energy is 32.4 KJ (Option D)
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did sans from Undertale really die or was he just trolling
Answers
Answer:
I think he was just trolling.
Explanation:
They don't give out any good reasons or evidence about him dying. I think they are just pretending. You tell me tho.... Many people think he did die, while others think that he didnt.
What do you think?!
What is the current reading on the ammeter A?
Answers
The current reading on the ammeter A is 0.30 A.
What is electric current?A stream of charged particles, such as electrons or ions, travelling through an electrical conductor or a vacuum is known as an electric current. The net rate of electric charge flowing through a surface or into a control volume is how it is calculated.
Charge carriers, which can be any of a number of particle kinds depending on the conductor, are the moving particles.
Current is scalar quantity and it follows the algebraic summation during addition.
The current reading on the ammeter A is = (0.20 A + 0.10 A) = 0.30 A.
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An object is (starting at rest) begins to plummet towards the earth. Assuming it is in a vacuum, how fast is the object traveling after 5s?
Answers
Answer:
–50.96
Explanation:
The following data were obtained from the question:
Initial velocity (Vᵢ) = 0 m/s
Acceleration (a) = – 9.8 m/s²
Time (t) = 5.2 s
Final velocity (Vբ) =.?
Acceleration is simply defined as the change of velocity with time. Mathematically, it is expressed as:
Acceleration (a) = Final velocity (Vբ) – Initial velocity (Vᵢ) /Time (t) =
a = (Vբ – Vᵢ) / t
With the above formula, we can determine how fast the object is traveling after 5 s as follow:
Initial velocity (Vᵢ) = 0 m/s
Acceleration (a) = – 9.8 m/s²
Time (t) = 5.2 s
Final velocity (Vբ) =.?
a = (Vբ – Vᵢ) / t
– 9.8 = (Vբ – 0) / 5.2
– 9.8 = Vբ / 5.2
Cross multiply
Vբ = –9.8 × 5.2
Vբ = –50.96 m/s
Therefore, the object is traveling at
–50.96 m/s