Fill in blank answers are- electron degeneracy pressure, nova, massive star supernova, white dwarf limit, accretion disk and white dwarf supernova
The radius of a white dwarf is determined by a balance between the inward force of gravity and the outward push of electron degeneracy pressure.
A nova occurs when hydrogen fusion ignites on the surface of a white dwarf in a binary system.
A massive star supernova occurs when fusion creates iron in the core of a star.
A white dwarf in a close binary system will explode as a supernova if it gains enough mass to exceed the white dwarf limit.
An accretion disk consists of hot, swirling gas captured by a white dwarf (or neutron star or black hole) from a binary companion star.
A white dwarf supernova can occur only in a binary system, and all such events are thought to have the same luminosity.
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Do scientific models always have limitations?.
Yes, scientific models have limitations as it is simpler that the original objects.
Models cannot include all the info on the objects that they represent. as an instance, maps cannot consist of all of the details of the functions of the earth including mountains, valleys, and so forth. Hence they have limitations of their own respectively.
All models have barriers because they are now not representative of every feasible state of affairs. They use modern expertise and clinical statistics, but as the ones are subject to exchange, the models based totally on that know-how and statistics are a problem to alternate as properly. Scientific models always have some limitations they will never be completely accurate.
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If you are lying down and stand up quickly, you can get dizzy or feel faint. This is because the blood vessels don't have time to expand to compensate for the blood pressure drop. If your brain is 0.4 m higher than your heart when you are standing, how much lower is your blood pressure at your brain than it is at your heart? The density of blood plasma is about 1025 kg/m3 and suppose your maximum (systolic) pressure of the blood at the heart is 116.4 mm of Hg (Note that 120 mm of Hg = 16 kP = 1.6 x 104 N/m2). Since most doctors still use mm of Hg, give your result in those units.
91.655 mm of Hg pressure is lower when our blood pressure at brain than it is at your heart.
pressure at brain= 121.8-30.135
pressure=91.655 mm Hg
Pressure is defined as force/area. To demonstrate the pressure from snow on a roof, divide the weight of the snow by the surface area of the roof. Gases are a typical pressure source in physics. A "vacuum" is used to describe the lack of pressure. Humans have long held the belief that vacuums are both improbably rare and unnatural since "nature abhors a vacuum." Actually, this is not the case.
The number of pressure units is ridiculous. It's common to use the torr or mmHg unit. This discussion is solely focused on the height of a mercury column. The atmosphere contains 760 torr, or mmHg. You could also look at mmH2O, which makes use of a comparable idea.
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astronomers have concluded that the sun's activity varies in an 11-year cycle. which of the following statements about this cycle is true:
Over the period of 11 years, the amount of sunspots increases and decreases.
Who and what are astronomers?Astronomers do research on planets, stars, and some other heavenly bodies. They employ both space-based technology, such as the Space Telescope Hubble and ground-based technology, such as optical telescopes. Some astronomers investigate far-off galaxies and objects like neutron stars and black holes.
Is a job in astronomy rewarding?Astronomy experts have the capacity to carry out study and put their beliefs to the test. Others find it enjoyable to communicate their findings of the study to the public after they've concluded their work. Furthermore, astronomy jobs pay well enough to support a family.
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Stephen drove from manchester to oxford. He drove at an average speed of 60 miles per hour, for two and a half hours. How far did he drive?.
He drives to a distance of 30 miles
1 h = 60 min
60 mph/ 60 min = 1 mph per minute
1h/2 = 30 min (only half an hour)
30 x 1 (mph) = 30
What is average speed ?Velocity is the direction speed of an object in motion as a measure of the rate at which its position is changing as seen from a specific point of view and as measured by a specific unit of time.
The total distance travelled by the object in a specific amount of time is its average speed. A scalar quantity, average speed, exists. The magnitude serves as its representation, and it lacks direction.
Speed is a scalar quantity that describes how quickly an object travels over space. The ratio of distance to time, which is a scalar quantity, is the average speed.
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What is called in the interior of the Earth can be classified as primordial and radiogenic heat?.
Primordial heat and radiogenic heat are the two main sources of the Earth's interior heat. The disintegration of radioactive materials deep below the Earth's interior produces radiogenic heat.
The Earth's mantle and core contain these elements, including uranium, thorium, and potassium. These elements produce heat when they decompose, which is energy. The heat produced by the Earth since its origin 4.5 billion years ago is known as primordial heat. The energy generated during the Earth's birth as a result of the condensation of gas and dust from the solar nebula is what causes this heat. The heat generated by this process is still present in the Earth's interior and is what causes the Earth's surface to move.
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gram shows how entropy varies with temperature for a substance that is a gas at the highest temperature shown. a plot of entropy on the y axis versus the temperature in kelvin on the x axis. the entropy and the temperature are initially 0. as the temperature increases, the entropy increases linearly. at a point some distance from the initial point, the entropy increases as the temperature remains constant. this portion is labeled 1. the entropy then continues to increases linearly as the temperature increases. at a third point some distance from the second point, the entropy again increases as the temperature remains constant. this portion is labeled 2. the entropy then increases linearly again as the temperature increases. segment 2 is larger than segment 1. what process corresponds to the entropy increase along the vertical segment labeled 1? the melting of the solid substance to a liquid. the boiling of the liquid substance to a gas. the warming of the liquid substance to its boiling point. the warming of the gaseous substance to its final temperature. the warming of the solid substance to its melting point.
Studying the graph of entropy and temperature, we get,
1. The process corresponds to the entropy increase along the vertical segment labeled 1 is The melting point of the solid substance to a liquid.
2. The process corresponds to the entropy increase along the vertical segment labeled 2 is The boiling point of the liquid substance to a gas.
3. The entropy change for segment 2 is larger than that of segment 1 because the difference in entropy between the gas state and the liquid state is greater than the entropy differences between the solid and liquid states.
Entropy: It is a way to gauge how random something is.
Entropy is the measurement of the amount of thermal energy per unit of temperature in a system that cannot be used for productive work. Entropy is a measure of a system's molecular disorder or unpredictability since work is produced by organized molecular motion.
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determine the focal length of a lens in a camera if the film is 36.9 mm away from the lens and the object distance is 59.2 cm.
The focal length of the lens is 39.3 mm. The result is obtained by using the thin lens equation.
What is the Thin Lens Equation?The Thin Lens Equation is the equation used on a thin positive or negative lens.
[tex]\frac{1}{f} = \frac{1}{d_{1} } + \frac{1}{d_{2} }[/tex]
Where
f = focal lengthd₁ = object distanced₂ = image distanceWe have a camera with the film 36.9 mm away from the lens and the object distance is 59.2 cm. Determine the focal length!
Let's convert the object distance's unit!
59.2 cm = 592 mm
The distance of the film from the lens is the image distance. So, the focal length is
[tex]\frac{1}{f} = \frac{1}{d_{1} } + \frac{1}{d_{2} }[/tex]
[tex]\frac{1}{f} = \frac{1}{592 } + \frac{1}{36.9 }[/tex]
[tex]\frac{1}{f} = \frac{(592-36.9)}{21844.8 }[/tex]
[tex]\frac{1}{f} = \frac{555.1}{21844.8 }[/tex]
[tex]f = \frac{21844.8}{555.1}[/tex]
f = 39.3 mm
Hence, the focal length of a lens in the camera is 39.3 mm.
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what is the wavelength of an electromagnetic wave that travels at 3 x 10 m/s and has a frequency of 60 mhz? (1 mhz
An electromagnetic wave with a frequency of 60 MHz and a speed of 3 x 108 m/s has a wavelength of 5 m .
Explain about the wavelength of an electromagnetic?The wave number is given by the formula k = 2/, where is the wave's wavelength. The wave's frequency is given by the formula f = /2, where is the angular frequency.
The electromagnetic spectrum is a range of frequencies, wavelengths, and photon energies that includes frequencies between 1 hertz and over 1025 Hz and wavelengths between a few kilometers and a small portion of the size of an atomic nucleus in the spectrum of electromagnetic waves.
The radio waves Radio waves are those electromagnetic waves that have the lowest frequency and longest wavelengths.
The electromagnetic wave's wavelength can be determined using the following formula:
If =v/f, then
V is the speed.
The frequency is f.
given the aforementioned variables
f = 60 MHz = 60 000 000 Hz
v = 3 x 10 m/s
= 3 x 10 /6
=5
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How many SCP sites are there?.
As of August 2021, there are approximately 6,600 articles about SCP objects. New articles are often written by contributors.
Site-19 is an SCP Foundation facility and currently the largest operating site. It houses hundreds of Safe and Euclid class SCPs and is the most famous of the many locations under Foundation control. The foundation maintains and operates numerous facilities around the world, from small outposts with only a few employees to large complexes with thousands of employees.
Site-17 is known for containing a large team of medical and psychiatric professionals to deal with the complex nature of many SCPs. Site-17's exact location on Earth is unknown outside of Headcanon. There is a theory that SCP-096 was created as a result of SCP-1529. The theory is that 096 was once a climber trying to climb a mountain.
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Answer:
88
Explanation:
A 4.0-kg mass is placed at (3.0, 4.0) m, and a 6.0-kg mass is placed at (3.0, -4.0) m. what is the moment of inertia of this system of masses about the z-axis?
The moment of inertia of this system of masses about the z-axis is 99 kg[tex]m^{2}[/tex].
Given,
Mass of first object, [tex]m_{1}[/tex] = 4 kg at (3, 4) m
Mass of second object, [tex]m_{2}[/tex] = 6 kg at 3, -4) m
The moment of inertia (I) of a system of particles is given as,
I = [tex]m_{i}x_{i} ^{2}[/tex]
Here, I = [tex]m_{1}x_{1} ^{2}[/tex] + [tex]m_{2}x_{2} ^{2}[/tex]
Moment of inertia, I = (4×[tex]3^{2}[/tex] )+ (6×[tex]3^{2}[/tex])
= (5×9) + (6×9)
= 45 + 54
I = 99 kg[tex]m^{2}[/tex]
Hence, the moment of inertia will be 99 kg[tex]m^{2}[/tex].
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at what distance from a 21 mwmw point source of electromagnetic waves is the electric field amplitude 0.040 v/mv/m ?
At a distance d from the source, the EM wave's intensity is represented 28.1m.
Determine the distance?When an electromagnetic wave source with power P generates waves isotropically in all directions, its intensity (I) is calculated at a distance d from the source as follows:
I = \sP \s4 \sπ \sd \s2.
Given to us are
The EM wave's source power is 21 mW.
At a distance d (to be determined) from the source, the electric field's amplitude is E o.
= \s0.040
V \s/ \sm
The EM wave's intensity (I)
I = \s1 \s2 \s× \sϵ \so \s× \sE \s2 \so \s× \sc \sI
= \s1 \s2 \s× \s8.85 \s× \s10 \s− \s12 \s× \s( \s0.040 \s)
2 \s× \s3 \s× \s10 \s8 \sI
= \s2.12 \s× \s10 \s− \s6
W \s/ \sm \s2
determining the distance d
At a distance d from the source, the EM wave's intensity is represented by the following formula:
I = \sP \s4 \sπ \sd \s2 \s2.12 \s× \s10 \s− \s6
W \s/ \sm \s2
= \s21 \s× \s10 \s− \s3
W \s4 \sπ \sd \s2 \sd
= \s28.1m .
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Which part of cellular respiration produces the most ATP how does it work?.
The correct answer is Electron Chain Transport.
The process human cells use to generate ATP is called cellular respiration.
In cellular respiration there is a phase of electron transport chain and it produces majority of ATP.
The two ATP-producing processes can be viewed as glycolysis (the anaerobic part) followed by aerobic respiration (the oxygen-requiring part).
Aerobic reaction can be defined as biological and chemical processes that occurs in the presence of oxygen.
Hence, an aerobic reaction requires oxygen before it can take place or occur and it produces adenosine triphosphate (ATP) as one of its end product.
In aerobic respiration, there are two main processes:
Krebs cycleElectron chain transportIt is the electron chain transport, that produces maximum ATPs. This is a stage in cellular respiration.
In mitochondria, between the matrix and inner mitochondrial space, an electron gradient is produced by the function of ETS. This ETS gets electron from NADH and FADH₂. This proton motive force is utilized for ADP and ATP and this production is called oxidative phosphorylation. This is called phosphorylation and along with phosphorylation it also has oxidation. The proton gradient helps in the generation of large amount of ATP molecules through chemiosmosis.
ATP are produced by ATPase enzyme.
Therefore, the process through which majority if ATP is produced by cellular respiration through the process of Electron chain transport.
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how large are asteroids? how does the total mass of all asteroids compare to the mass of a terrestrial world?
Vesta, the largest asteroid, has a diameter of about 329 miles (530 kilometers), but there are also bodies that are only 33 feet (10 meters) across.
All of the asteroids put together have less mass than the moon of Earth or terrestrial world.
What are asteroids ?Small, stony objects called asteroids orbit the Sun. Despite orbiting the Sun similarly to planets, asteroids are far smaller than planets.
Asteroids can be divided into three general composition classes: C-, S-, and M-types.
The majority of asteroids are C-type (chondrite) objects. They are dark in color and most likely made of silicate and clay rocks.
Nickel-iron alloys and silicate minerals make up the S-types ("stony").
Metal makes up the M-types (nickel-iron).
The Sun has never been hit by an asteroids, but that doesn't imply they don't! Asteroids typically stay in the belt between Mars and Jupiter known as the asteroid belt, but on rare occasions, something can cause them to deviate from their original orbits and crash into the inner solar system.
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Radio wave from pace are gathered and reflected toward the focal point where the receiver receive them, and wave are tranmitted to the recording device
Radio waves from the pace are gathered and reflected toward the focal point where the receiver receives them, and waves are transmitted to the recording device the same radio source is being watched by two radio telescopes. On the ground, there is a known separation between the telescopes. As a result, the radio waves from the source will reach each telescope at a little different time. The waves appear slightly differently, with one arriving a little bit later than the other. The difference is a shift in the wave's phase over time.
Due to their phase shift, the two offset waves will not precisely overlap when combined, leading to interference fringes. The angles of their observations shift as the Earth rotates and the telescopes tilt to continue monitoring their source setting.
Similar to how shadows are longer when the Sun is lower, this tracking movement of the telescopes alters the distances that radio light travels from the source to each telescope. This results in various phase delays for the waves as they approach each telescope. The more variables we see, the longer we observe. We have more viewpoints on the object we're watching the more variants there are.
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What is the optional vacuum cup mount bracket for the control head of a yaesu ftm-400dr?.
The Yaesu MMB-98 is an optional vacuum cup mount for the control head of the Yaesu FTM-400DR.
Cameras, scopes, testing tools, antennas, lights, signs, and much more can be mounted to them. Industrial strong suction cup for mounting your equipment to vehicles, bikes, boats, and other surfaces. The pump-active provides greater stability and suction power than the sure lock lever method. Yaesu Transceiver Mounting Brackets let you attach your radio and/or faceplate for better sight and operation. Secure attachment is provided by sturdy metal brackets. Some Yaesu accessory mounting brackets are sold separately or in kits that include a separation cable.
Yaesu Mobile Transceiver Mounting Brackets can assist you in remotely mounting your control head and primary mobile transceiver components. Vacuum cup mounting bracket with angle adjustment, newly created MMB-98. Yaesu's MMB-9 front panel attachment bracket was created specifically for Yaesu
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The range of cannon ball fired horizontally from laboratory table i equal to 8/3*the hight of the table what i the direction of the velocity of the projectile a it trike the ground?(from horizontal)
The direction of the velocity of the projectile a it trike the ground is 63.43°.
What is velocity?
A body's or an object's motion's direction. Speed is fundamentally a scalar quantity. Velocity is a vector quantity in its purest form. It refers to the rate at which distance varies. It is the rate of displacement change.
What is height?
Height is a measurement of vertical distance, or how high something or someone is (how tall they are) (how "high" a point is).
The range ( X) of cannon ball is equal to height (h) of the cliff, which is initial height of cannon ball.
∴ X= h
Therefore, the angle which final velocity vector of the cannon ball makes with and below horizontal is given by
θ= tan ⁻¹ (2h/x)
tan ⁻¹ (2h/h) (∴ X= h)
= tan ⁻¹ 2
≈ 63.43°
Therefore, the direction of the velocity of the projectile a it trike the ground is 63.43°.
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the time it takes for a college student to travel between her home and her college is uniformly distributed between 40 and 90 minutes. refer to exhibit 6-2. the probability that her trip will take exactly 50 minutes is
For the continuous probability distribution probability at any constant value is 0. Because the interval width is 0 in that case. There must always be an interval to calculate the probability in case of a uniform distribution.
Continuous probability distribution: A probability distribution in which the random variable X can take on any (continuous) value. Since there are an infinite number of values that can be assumed by X, the probability that X will take a given value is zero.
For the probability distribution of continuous distributions in this problem each constant value is 0.
P[x= 50] = 0
P(the journey will take exactly 50 minutes) = 0
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a coil is connected in series with a 13.7 k resistor. an ideal 73.0 v battery is applied across the two devices, and the current reaches a value of 2.95 ma after 5.46 ms (a) Find the inductance of the coil. (b) How much energy is stored in the coil at this same moment?
The inductance of the inductor is 169Ω and the energy in the inductor is 1.48 x 10⁻³ J.
The resistance of the resistor is 13.7K and the ideal battery has EMF 73.0 V. So, the initial current in the circuit will be,
I = 73/13700
I = 5.3 mA.
The current reaches 2.95 mA after 5.46 mA.
(a). The inductance in the coil can be given by,
E = LΔI/Δt
L is the inductance and E is the EMF, So, Putting values,
73 = L(2.35)/5.46
L = 169Ω.
(b) The energy in the inductor when current is 2.95 mA,
E = 1/2LI²
Putting values,
E = 1/2 x 169 x 2.95 x 2.95 x 10⁻⁶
E = 1.48 x 10⁻³ J.
So, energy in the inductor is 1.48 x 10⁻³ J.
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Will an empty plate heat up in the microwave?.
No, empty plate doesn't get heated up in the microwave.
This is because the microwave oven heats the food by heating the water molecules that compose it.
This is achieved by increasing the vibration amplitude of the water molecules and their kinetic energy, therefore, increasing their temperature.
So, if the element that gets into the microwave oven does not contain water (as is the case of an empty paper plate), it will not heat up.
Therefore, this is all about the transfer of energy. This the principle on which microwave works. The transfer of heat energy from one object to the other increases the kinetic energy of the particle of the other object. But no object mean no heat energy transfer and the plate isn't heated.
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A 1500 kg elevator, suspended by a single cable with tension 16.0 kN, is measured to be moving upward at 1.2 m/s. Air resistance is negligible.1. We want to find the elevator’s speed after traveling upward 10.0 m. This could be solved with Newton's laws and kinematics, but we will use the energy principle. How much work does tension do on the elevator as it rises 10.0 m?2. How much work does gravity do on the elevator as it rises 10.0 m?3. What is the elevator's kinetic energy after rising 10.0 m?4. What is the elevator's speed after rising 10.0 m?
Tension in the Cable is 0.87 m/s6^2, Elevator's speed after it has moved 10m is 1.6*10^5 N, Work done by gravity is 1.47 * 10^3 N, Elevator Kinetic Energy is 13897.5J and Elevator Speed after rising to 10m is 4.312 m/s.
Tension is a pulling force that operates in one dimension along the cables' axes in the opposite direction from the direction of the applied force. The combined weight of the elevator box and the passenger riding inside it, in the case of an elevator, provides the pulling force in the cables is called Tension.
A moving object or particle's kinetic energy, which depends on both mass and speed, is one of its characteristics. The type of motion can be vibration, translation, rotation around an axis, or any combination of these. Kinetic energy is a type of energy that an item or particle possesses as a result of motion.
We know that,
Tension in the Cable
T = m(g+a) = g+a = T/m = 16 * 103 / 1500 = 10.67 m/s2
a = 10.67 - 9.8 = 0.87 m/s6^2
Elevator's speed after it has moved 10m.
U^2 = u^2 +2as
= 1.22 +2*0.87*10
=1.6*10^5 N
Work done by gravity = mg * 10 = 14700 * 10 = 1.47 * 10^3 N
Elevator Kinetic Energy = 1/2 mv^2 = 1/2*1500*18.53 = 13897.5J
Elevator Speed after rising to 10m ,
U^2 = u^2 +2as = 1.2 +2*0.87*10 = 18.6
U =(18.6)^1/2=4.312 m/s
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It is possible to travel faster than the speed of sound
Radiation in the infrared (IR) range is________
in energy than visible or ultraviolet light. When a molecule absorbs IR radiation,_________ within the molecule and each____________ creates a band in the molecule's IR spectrum
Compared to visible or ultraviolet light, infrared (IR) radiation has [lower] energy.A molecule's internal bonds vibrate when it absorbs IR radiation, and each [ wavelength] produces a band in the molecule's IR spectrum.
Between visible light and X-rays on the electromagnetic spectrum is ultraviolet light.The wavelength range of UV "light" is between 10 and 400 nanometers. The wavelength of VL is about Four hundred nanometers. Hospitals use UV rays because of their potency to sterilize medical equipment. All living cells are destroyed by the high UV radiation doses. Elephants cover themselves in mud to shield themselves from the sun. Under UV light, scorpions glow. UV radiation is a type of non-ionizing radiation that is emitted by artificial sources like tanning beds and the sun. While it can produce vitamin D, which is good for people, there are also potential health risks. The sun is a natural source of UV radiation for us.
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What are the 3 follow up steps you should take after a collision?.
Stop, assist anyone who is hurt, protect your cars from additional damage, dial 911, and exchange any necessary details with the authorities.
What exactly does it mean to collide?A forceful collision; the act of colliding; collision between two aircraft, or crash. a collision of goals; a dispute. When two particles or bodies collide, they each apply a force that causes them to lose or gain energy or momentum. This is known as a collision in physics.
In physics, what exactly is a collision?When particles, groups of particles, or solid objects travel in the same direction and get close enough to one another to contact and have an impact on one another, that is when a collision occurs in physics.
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why does nuclear fusion require high temperatures and high densities? (select all that apply.)
The nuclear fusion reaction occurs at temperatures approximately 107 degrees Celsius. It takes this high temperature for the nuclei to begin travelling at high speeds, increasing their kinetic energy.
Why are high temperatures required for nuclear fusion?Nuclear fusion is a nuclear reaction that occurs when two light nuclei collide to form a single, heavier nucleus. Because the mass of the new nucleus is smaller than the sum of the original masses, fusion releases energy. According to the concept of mass-energy equivalence, this mass difference indicates that some of the "lost" mass has been turned into energy. Fusion necessitates both extremely high temperatures in order to provide enough energy to hydrogen atoms to overcome proton repulsion. Microwaves or lasers must be employed to heat hydrogen atoms to the required temperatures.
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Simple Way to Measure Magnetic Fields The induced emf in the loop is measured to be V. What is the magnitude B of the magnetic field that the loop was in? Express your answer in terms of some or all of the variables A, C, and V. A loop of wire is at the edge of a region of space containing a uniform magnetic field B. The plane of the loop is perpendicular to the magnetic field. Now the loop is pulled out of this region in such a way that the area A of the coil inside the magnetic field region is dA decreasing at the constant rate c. That is, -C, with c > 0. For the case of a square loop of side length L being pulled out of the magnetic field with constant speed v (see the figure), what is the rate of change of area dA с
The Value of the Magnetic Field (B) is V/c
a)Induced Emf in the loop is given
[tex]V = -\frac{d\phi }{dt}[/tex]
since [tex]\phi =BA[/tex]
[tex]V=-\frac{d}{dt}(BA)=-B\frac{dA}{dt}[/tex]
given dA/dt = -c
V=-B(-c)=Bc
=>[tex]B=\frac{V}{c}[/tex]
b) since induced emf V=BLv
B=(BLv)/c
c=Lv
The magnetic influence on moving electric charges, electric currents, and magnetic materials is described by a magnetic field, which is a vector field. A force perpendicular to the charge's own velocity and the magnetic field acts on it when the charge is moving through a magnetic field. Nearly a magnetic dipole, the Earth's magnetic field (and surface magnetic field) has two poles, one at the planet's geographic north pole (see Magnetic North Pole) and the other near its geographic south pole (see Magnetic South Pole).
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with a small telescope, we see that the moon has regions that are relatively smooth and others that are saturated with impact craters. what does this tell us about the moon's development?
With a small telescope we can see the moon has regions that relatively smooth and others are saturated with Impact craters this tell us that the moon doesn't have much surface evolution.
When the moon is observed under a small telescope we can see that the some regions on the Moon are relatively smooth while some are saturated with impact craters. This discontinuity in the pattern of the surface of the Moon tell us that moon does not have surface evolution over its landscape.
When the surface of a planet evolves it shows distant pattern between the regions on it.
But because of the above mentioned certain characteristic of the regions we can tell about moon's development that the surface of the moon is not evolving that much.
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a 1 kg object is dropped from a height of 100 meters. air resistance is negligible. at what height will it reach half the potential energy?
The 1kg object dropped from 100m would reach half its potential energy halfway through the drop.
What is potential energy?
Simply explained, potential energy is the energy that an object holds due to its position in relation to a zero point. An object has gravitational potential energy if it is positioned at a height above (or below) the zero height.
Potential energy is energy that is conserved or stored in a substance or object. The amount of stored energy depends on the arrangement, organization, and state of the object or substance.
It can be thought of as energy that has the "potential" to do work. When the object's position, configuration, or state changes, the energy will also change.
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What is 20 miles per hour in feet per second? round to the nearest tenth if necessary.
29.33 ft/sec is speed in feet per second.
20 miles= 105600 ft
1 hour= 3600 second
speed= distance/time
speed=105600/3600
speed=29.33 ft/sec
It is possible to express how much an object's location shifts over time or how much it shifts per unit of time using a scalar variable called speed. It is frequently abbreviated to "s." The distance traveled by an object divided by the duration of the period gives the average speed of the object over the period.
The speed-related metric is time divided by distance. While the meter per second (m/s) is the SI unit of speed, the kilometer per hour (kph) is the most widely used unit in daily life (kph).
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Answer:
figure itout 20
Explanation:
20 -0
a current of 3 a is passed through a lamp for 2 seconds using a 6 v power supply. the energy dissipated by this lamp during the two seconds is:
A lamp receives a 3 a current for 2 seconds from a 6 v power source. This lamp lost 3.6J of energy during those two seconds.
J=0.3 A
t = 2MIN = 2*60 =120sec
V=6v
E=VIT
=6*0.3*120
=216J
for 2 sec is
E=VIT
=6*0.3*2
=3.6J
Energy is characterized as having the "ability to accomplish work, which is the capacity to apply a force sufficient to move an object." Despite this unclear definition, the concept is actually quite straightforward: energy is just the force that moves objects. Potential and kinetic energy are the two different categories. An electrical charge carrier flow known as current often involves electrons or atoms lacking in electrons. Amperes are the common unit and are denoted by the letter A. Typically, the letter I is used to represent current. While current and electron flow in the same direction, they do so in opposite directions. Electrons move from a negative potential to a positive potential, and vice versa.
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Water emerges straight down from a faucet with a 1.80-cm diameter at a speed of 0.500 m/s. (Because of the construction of the faucet, there is no variation in speed across the stream.) (a) What is the flow rate in cm3 /s ? (b) What is the diameter of the stream 0.200 m below the faucet? Neglect any effects due to surface tension.
The flow rate of the faucet is 127.23 cm²/s and diameter below the faucet is 1.88 cm.
For calculating the flow rate, we will use the formula -
Q = Ar
A = πr², were Q is flow rate, A is area and r is radius.
Also, radius = diameter/2
Radius = 1.8/2
Radius = 0.9 cm
Speed = 50 cm/s
Q = πr²v
Q = 3.14×0.9²×50
Q = 127.23 cm²/s
The diameter of stream will be calculated by the formula -
[tex] v_{f}[/tex]² - [tex] v_{i}[/tex]² = 2gy, where [tex] v_{f}[/tex] is final velocity, [tex] v_{f}[/tex] is initial velocity, g is acceleration due to gravity and y is diameter of stream.
[tex] v_{f}[/tex] = ✓50² - 2×9.8×20
[tex] v_{f}[/tex] = ✓2500 - 392
[tex] v_{f}[/tex] = ✓2108
[tex] v_{f}[/tex] = 45.9 cm/s
r = ✓Q/πv
r = ✓127.23/3.14 × 45.9
r = ✓127.23/144.2
r = ✓0.88
r = 0.93 cm
d = 2r
d = 2×0.93
d = 1.88 cm
Thus, flow rate is 127.23 cm²/s and diameter is 1.88 cm.
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