Q=mcΔt
Q=14.6 x 10³ x 1.37 x (85-20)
Q=1.3 x 10⁶ J = 1.3 x 10³ kJ
What is electromagnetic waves
one of the waves that are propagated by simultaneous periodic variations of electric and magnetic field intensity and that include radio waves, infrared, visible light, ultraviolet, X-rays, and gamma rays.
Subject- Science 6th grade
please help with hw. Thank you!
Answer:
Option c: wind and clouds
Is gauge pressure larger, smaller, or the same as absolute pressure?.
Answer:
gauge pressure loses what ever pressure is in the local environment around the pressure vessel. so it's always lower than absolute pressure , except in outter space :P then they are the same. But do you really want to measure your cars tire pressue out in space?? :P
Explanation:
100 POINTS
Plutonium-235
Given: energy released = about 200 MeV per individual reaction (mass = 239 amu)
Part A
List the balanced nuclear reaction.
I NEED THIS ASAP
Answer:
One gram atom of any substance contains one Avogadro number of atoms. Therefore, the number of atoms of U-235 present in 235 g of the substance = Avogadro Number = 6.02×10^23 atoms
The number of U-235 atoms present in 1 g of the substance = (6.02×10^23/235) atoms=2.56×10^21 atoms
Energy released in one atom fissioning = 200 MeV= 200 MeV × 1.6 × 10^-6 erg/MeV= 3.2 ×10^-4 erg/atom.
Energy released in the fission of all the atoms contained in 1g of Uranium-235 fissioning = (2.56×10^21 atom)×(3.2×10^-4 erg/atom)=8.19 ×10^17 erg
Now
1 kWh = 1000 Watt hour = 1000×( 10^7 erg/s)×3600s = 3.6 ×10^13 erg/kWh
So energy in kWh released in fission of 1 g of U-235 = (8.19× 10^17 erg)÷(3.6×10^13 erg/kWh) = 2.55 ×10⁴ kWh.
Added on 19th February, 2019.
The energy consumption of an average home in India in a month is between 300–500 kWh in the metropolitan cities. Let us take it at 400 kWh. So one gram of nuclear fuel (uranium) would be able to meet the energy requirements of a town of about 6000 for a month.
The energy in a fissile material is highly concentrated, compared to other types of fuels like wood, coal, diesel etc. So nuclear powered submarines can remain below water for very long periods of time, as they do not need to surface for getting fuel.
Explanation:
Energy in kWh released in fission of 1 g of U-235 is 2.55 ×10⁴ kWh.
How do find the energy released in fission?One gram atom of any substance contains one Avogadro number of atoms. Therefore, the number of atoms of U-235 present in 235 g of the substance = Avogadro Number = 6.02×10^23 atoms
The number of U-235 atoms present in 1 g of the substance = (6.02×10^23/235) atoms=2.56×10^21 atoms
Energy released in one atom fissioning = 200 MeV= 200 MeV × 1.6 × [tex]10^{-6}[/tex] erg/MeV= 3.2 ×[tex]10^{-4}[/tex] erg/atom.
The energy released in the fission of all the atoms contained in 1g of Uranium-235 fissioning = (2.56×[tex]10^{21}[/tex] atom)×(3.2×[tex]10^{-4}[/tex] erg/atom) = 8.19 ×[tex]10^{17}[/tex] erg
1000 Watt hour = 1000×( [tex]10^{7}[/tex] erg/s)×3600s = 3.6 ×10^13 erg/kWh
So the energy in kWh released in fission of 1 g of U-235 = 2.55 ×10⁴ kWh.
Fission takes place when a neutron slams into a bigger atom, forcing it to excite and break up into smaller atoms—additionally referred to as fission products. Extra neutrons are also launched that may initiate a sequence reaction. whilst each atom splits, a high-quality amount of electricity is released.
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what is the first law of motion?
Answer:
Newton's first law states that if a body is at rest or moving at a constant speed in a straight line, it will remain at rest or keep moving in a straight line at constant speed unless it is acted upon by a force.
Explanation:took the test in 2nd grade
What is the magnitude of the electric field at the dot in the figure? (figure 1)
The magnitude of the electric field at the dot is : 10⁴ v/m
What is electric field?
Electric field is a region around a charged particle or object within which a force would be exerted on other charged particles or objects.
Given that there are three equipotential lines with equal spacing,we will apply the the relationship between P.D and electric field
Determine the magnitude of the electric field at the dot
change in voltage = E .d
[tex]100 - 0 = E \times ( 1 \times 10^{-2}\ m ) ----- ( 1 )[/tex]
From equation ( 1 )
The magnitude of electric field will be given as
[tex]E = \dfrac{100 }{ ( 1 \times 10^{-2})\ }[/tex]
[tex]E = 10^4\ \ \frac {v}{ m}[/tex]
Hence we can conclude that The magnitude of the electric field at the dot is : 10⁴ v/m
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Why does Mars provide the best opportunity for habitation by humans?
Answer:
Mars is an opportunity for humans to carry forward the light of consciousness, plus it is the closest planet like earth, it has land humans can land on and although its small, theres still water
Which of the following is an appropriate explanation for why thermal energy is a combination of the kinetic and potential energies of the molecules in a sample of matter?
a. Thermal Energy is based on how quickly the particles are moving (kinetic energy) and how much energy is stored in their electric fields (potential energy)
b. Thermal Energy is based on how much room the particles have to collide (kinetic energy) and how much energy they gain from those collisions (potential energy)
c. Thermal Energy is based on how quickly the particles are moving (kinetic energy) and how much freedom they have to move further (potential energy)
d. Thermal Energy is based on how tightly contained the particles are (kinetic energy) and how loose their electron structure is (potential energy)
The appropriate explanation for why thermal energy is a combination of the kinetic and potential energies is Thermal Energy is based on how quickly the particles are moving (kinetic energy) and how much energy is stored in their electric fields (potential energy)
What is thermal energy?Thermal energy refer to the heat energy generated from an object or particle when there is increase on temperature whose internal energy is in equilibrium
Potential energy is the energy stored in a body at rest.
Kinetic energy is the energy at work in a body in motion.
Therefore, The appropriate explanation for why thermal energy is a combination of the kinetic and potential energies is Thermal Energy is based on how quickly the particles are moving (kinetic energy) and how much energy is stored in their electric fields (potential energy)
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Heredity has an impact on personal health, but environmental factors are important as well. please select the best answer from the choices provided t f
Heredity has an impact on personal health, but environmental factors are important as well, the given statement is True.
Heredity represents the transfer of traits from one generation to the next generation. It has an impact on personal heath as the health condition of an individual is goverend by the protein products that control the growth and development of the organism.
For instance, the presence of hazardous substances in air, water, and soil that cause pollution directly have harmful impact on the health of individuals.
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A student with a mass of 65.5 kg runs up a flight of 18 stairs. Each of the steps has a height of 16.5 cm. The student was able to reach the top of the stairs in 2.57 s while climbing it 1 stair at a time.
1. Determine the student’s body power
2. If the student changed the number of steps taken in each step (i.e. 2 at a time OR 3 at a time) but nothing else changed, would this change the power of the student? Explain.
3. A Big Mac meal from McDonalds has 4 853 440 J of energy (1160 calories!). Using your answer from number 1, determine how long it would take for you to convert all the energy in a Big Mac meal (if only running stairs at the same rate). Express your answer in minutes.
The power developed by the student is 756.9 J/s and remains the same if the student takes the same time to climb the stairs when climbing it in two's and three's.
What is power?Power is the rate at work is done.
Power = work done/timework done = mass × acceleration due to gravity × heightWork done = 65.5 × 10 × (18 × 0.165) = 1945.35 J
Power = 1945.35/2.57 = 756.9 J/s
If the student climbed the steps in two or three at a time, the power does not change if the time remains the same.
Time required = Energy/ powerThe time required to convert the Big Mac meal from McDonalds = 4 853 440/756.9
Time required = 6412.26 seconds
Therefore, from the power developed by the student, it will take him 6412.26 seconds to convert all the energy in a Big Mac meal.
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Can someone please answer this, ill give you brainliest Would be very appreciated.
Answer:
False
Explanation:
Solid water (ice) has a lesser density than liquid water. Hence, the statement is false.
Answer:
False
Explanation:
Let's know the relationship
Density=Mass/VolumeDensity is indirectly proportional to volume
If volume is less density is more and if volume is more density is less.
But Density also depends on temperature
Higher the temperature higher the density.
Liquid stage of water has higher temperature than solid .Liquid has higher density than solid .
2. Sound waves moves down a hall past an open doorway. Waves of which wavelength would have the hardest time diffracting through the doorway
A 5 centimeters
B.2 meters
C. 100 meters
D. All of the above would easily diffract
Sound waves go along a corridor, past an open doorway. All the waves will have the most difficulty diffracting through the doorway. Option D is correct.
What is diffraction?Diffraction refers to a variety of events that occur when a wave collides with a barrier or an opening.
Diffraction is described as the bending of waves around the corners of an obstruction or through an aperture into the region of the obstacle's geometrical aperture's shadow.
The one with the longer wavelength will readily diffract. As a result, the one with a wavelength of 100 m can diffract readily.
Sound waves have a wavelength of 16.6 ×10⁻³ to 16.6 m in comparison to other waves. Which are audible to them, allowing them to diffract readily.
Sound waves go along a corridor, past an open doorway. All the waves will have the most difficulty diffracting through the doorway.
Hence,option D is correct.
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physics 9
physics geniuses where r u need help!!!
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pls also check other questions!
A transformer uses 91 V supply to operate 13 V device, then the current in the primary coil is 0.27A.
What is transformer?A transformer is an electrical device which is involved in transferring electric energy from one AC circuit to another, either stepping up or down.
As, from the ohm's law, voltage is directly proportional to the current flowing through the coil.
I₂ / I₁ = V₂ / V₁
The current from the transformer I₁ is 1.9A, the voltage supply V₁ = 91V and the voltage to operate is 13 V, then the current through the primary coil is
I₂ = (91 / 13 ) x 1.9
I₂ = 0.27A
Thus, the current from the primary coil is 0.27A.
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How long does light from jupiter take to reach earth.
Answer:
Light from Jupiter should take about 35 - 52 minutes to reach Earth.
Explanation:
Average time is about 44 minutes but the realistic time varies 5 or 6 minutes depending on the orbital location of both earth and jupiter.
Subject- Science
Grade- 6th
please help me with hw. Thank you!
Answer:
b. they get blown in from colder or warmer areas.
Answer:
Option b.
Hope it helps
Aurora binge drinks. what does this most likely mean for aurora? a she drinks enough alcohol to become intoxicated. b she only drinks at social occasions. c she drinks one or two drinks every night. d she avoids alcohol altogether.
The most likely mean for aurora. She drinks one or two drinks every night. Option C is correct.
What is Binge-drinking?Binge-drinking is explained as having five or more drinks in one sitting for males, and four or more drinks in one sitting for women.
The majority of people who binge-drink do not have a serious alcohol problem. Binge-drinking, on the other hand, is a dangerous risk behavior linked to significant injuries and a variety of disorders.
Hence, option C is correct.
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How many planets in total are in our solar system, including earth?.
A sled of mass 100. kg decelerates at 0.40 m/s² while coasting over the ice. Draw the free body diagram.
What is the "slowing" force of friction due to ice?
The slowing force of friction due to ice on the given sled on the ice is determined as 40 N.
Slowing force of friction due to ice
The slowing force of friction due to ice can be determined by using Newton's second law of motion as follows;
F = ma
where;
m is mass a is accelerationF = 100 x 0.4
F = 40 N
Thus, the slowing force of friction due to ice on the given sled on the ice is determined as 40 N.
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Please help if you know
This question involves the concepts of induced emf and magnetic field.
The wire has to move at a speed of "20 m/s".
Speed of WireThe emf induced in a current carrying conductor when it passes through a magnetic field is given by the following formula:
[tex]E = vBl\\\\v=\frac{E}{Bl}[/tex]
where,
v = speed = ?E = induced emf = 10 voltsB = magnetic field = 2.5 Tl = length of wire = 0.2 mTherefore,
[tex]v=\frac{10\ volts}{(2.5\ T)(0.2\ m)}[/tex]
v = 20 m/s
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What ions rush into a neuron during depolarization.
Answer:
Sodium ions
Explanation:
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As a minimum requirement, a boat that is less than 26 feet in length with an installed fuel tank must have what type of fire extinguisher onboard?.
As a minimum requirement, a boat that is less than 26 feet in length with an installed fuel tank must have 5-B fire extinguisher.
What is fire extinguisher?
A fire extinguisher is a fire protection device used to terminate or control small fires, often in emergency situations.
Minimum requirement for fire extinguisher in boatsIf your boat is less than 26 feet, you need one 5-B fire extinguisher on board.
Thus, as a minimum requirement, a boat that is less than 26 feet in length with an installed fuel tank must have 5-B fire extinguisher.
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how are electromagnetic waves like ocean waves
Answer:
Another way electromagnetic (EM) waves are like ocean waves is that they both move energy from one place to another. The biggest difference between ocean waves and EM waves is that ocean waves move across water. Energy moves through the water. EM waves don't need anything to move through.
Explanation:
HELP I'LL GIVE BRAINLIEST!!! A mosquito flaps its wings 800 times per second, which produces the annoying 800 Hz buzz. How far does the sound travel between wing beats? The speed of sound in air is 340 m/s. Answer in units of m. :)
Answer:
Explanation:
The distance traveled by the sound wave between the beats of mosquito flapping its wing is its wavelength. Since it is defined as the distance traveled by a periodic disturbance that propagates in a cycle, it is shown as:
λ = v/f
λ=340m/800Hz = 0.425m.
Pretty sure this is the answer, hope this helps!
What do people mean when they say "dropping of the face of the planet"? Is that even possible?
Answer:
Explanation:
Remark
Don't read it literally. It does not mean that you are on earth's surface one moment and the next your floating somewhere on the edge of the milky way.
It means that before the remark was made, you were outgoing and friendly. Something happened that caused you to withdraw from society and become somewhat like a hermit.
The magnitude of a force acting on an object is equal to the amount of change in momentum divide by ?
Answer:
time taken.
Explanation:
F = ma
F = m × (v - u) / t
F = mv - mu / t
mv - mu = change in momentum
A candle is 49 cm in front of a convex spherical mirror that has a focal length
of 35 cm. What are the image distance and magnification? Is the image
virtual or real? Is the image inverted or upright? Draw a ray diagram to
confirm your results.
The convex spherical mirror is the diverging mirror. The image distance is 20.4 cm. The magnification is 0.417. The image is virtual and upright.
What is magnification?Magnification is the ratio of image distance to the object distance.
Object distance is 49 cm and the focal length of convex mirror is 35 cm, then image distance is calculated by the lens maker formula.
1/f = 1/v +1/u
1/-35 = 1`/v +1/49
v= -20.4 cm
Thus, the image distance is 20.4 cm.
The magnification is given by
m = v/u
m = -20.4 / 49
m = 0.417
Thus, the magnification is 0.417.
The image formed is by virtual meeting of light rays and above the principle axis. Thus the image is virtual and upright.
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Suppose that the separation between speakers A and B is 5.00 m and the speakers are vibrating in phase. They are playing identical 125-Hz tones, and the speed of sound is 343 m/s. What is the largest possible distance between speaker B and the observer at C, such that he observes destructive interference?
The largest possible distance between speaker B and the observer at C is 1.37 m.
Largest possible distance between the observer and speaker B
The largest possible distance between speaker B and the observer at C occurs when the difference in travel distances is just one half wavelength.
λ = v/f
λ = (343)/125
λ = 2.744
¹/₂λ = ¹/₂(2.744) = 1.37 m
Thus, the largest possible distance between speaker B and the observer at C is 1.37 m.
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Which factor is the main reason the first spaceships were so large?
a. to improve magnetic levitation
b. to increase the thrust to reach escape velocity
c. to carry more astronauts
d. to carry large amounts of fuel
Answer:
d
Explanation:
Study the image. the wind belts. the earth is shown with points 1 through 4. 1: winds in middle latitudes that originate from high pressure. 2: near the equator, air circulates in an upward direction. 3: subtropical regions with calm winds. 4: winds near poles that blow toward the low pressure areas of the westerlies. which point shows the prevailing westerlies? 1 2 3 4
The point that shows the prevailing westerlies is the wind belt labelled with 1.
What is prevailing westerlies?Prevailing westerlies is the average or normal westerly winds of the middle latitudes.
From the given image of wind belts, 1 represents winds in middle latitudes that originate from high pressure.
Thus, the point that shows the prevailing westerlies is the wind belt labelled with 1.
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Answer:
A. 1
Explanation:
I need help with my homework please? I will give a lot of points and a brainlist.
Answer:
1. False
some metals are ferromagnetic
2.True
3. True
4. True
5. False
The strength of electromagnetic can be increased by increasing the number of wire around it
#1
FalseVery few like Fe,Ni ,Co are ferromagnetic.
Most are para magneticSome are dia magnetic#2
True
#3
True
#4
It's Orsterd experiment conclusion
True#5
FalseBecause
[tex]\sf B=\mu_o nI[/tex]
If you decrease no of turns magnetic force decreases