The weight of her in newtons is 294.3N.
What is weight?The weight of any object is the mass times the acceleration due to gravity on Earth or any other planet.
Weight W = mg
where g = 9.81 m/s²
Given is Kenna has a mass of 30 kilograms.
So, weight of Keena will be
W = 30 x 9.81
W =294.3 N
Thus, weight of her in newtons is 294.3N.
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two equally charged particles are held 3.2x10-3 m apart and then released from rest. the initial acceleration of the first particle is observed to be 7.0 m/s2 and that of the second to be 9.0m/s2 . if the mass of the first particle is 6.3 x 10-7 kg, what are (a) the mass of the second particle and (b) the magnitude
The mass and magnitude of the second particle are calculated below.
The initial velocity of an object is its velocity prior to the effect of acceleration, which causes the change. The velocity will be the final velocity after accelerating the object for some time. When a particle moves at a constant speed, it can be accelerated. When a point object moves in a horizontal circular path at a constant speed, the direction of its velocity vector changes over time. It means that in a uniform circular motion, the object's velocity vector changes over time.
Distance between the charges, r = 3.2 × \(10^{-3}\)m
initial acceleration of first particle, \(a_{1}\) = 7m / \(s^{2}\)
Initial acceleration of second particle, \(a_{2}\) = 9.0m / \(s^{2}\)
Mass of first particle, \(m_{1}\) = 6.3 × \(10^{-7}\)kg
Mas of second particle, m₂ = ?
a) Since, \(F_{1}=F_{2}\)
∴ \(m_{1}a_{1} = m_{2}a_{2}\)
mass of second particle-\(m_{2}\) =\(\frac{m_{1}\times a_{1}}{a_{2}}\)
= \(\frac{6.3\times10^{-7}\times7.0}{9.0}\)
=4.9 × \(10^{-7}\)Kg
b)As, \(F_{1} = F_{2}\)
= \(\frac{q_{1}q_{2}}{4\pi E_{0}r^{2}}\) = \(m_{1}a_{1}\)
= 6.3 × \(10^{-7} \times\) 7.0
= 44.1 × \(10^{-7}\)
∴ q = 7.1 × \(10^{-11}\)C.
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how we will solve this question?
36.45cL=______=μL
Answer:
0.364
I believe... Good luck!
In which beaker was the average kinetic energy of the particles the greatest?
Answer:
The warmer the temperature the more kinetic energy.
Explanation:
The highest temperature
The typical kinetic energy formula is used to comprehend the kinetic energy of a gas. This formula uses the gas's temperature to calculate the kinetic energy, or KE. This is carried out because a gas's kinetic energy is exactly related to its temperature. Thus option D is correct.
What role of average kinetic energy of the particles?Temperature is a gauge for the typical kinetic energy of a substance's constituent particles. It is a particle's typical kinetic energy.
A gas's temperature directly relates to the average kinetic energy of its particles. The particles must travel more quickly as the gas warms since their mass is constant.
The average kinetic energy of the particles in a sample of matter falls as it is continuously cooled. One would anticipate that eventually the particles will stop moving altogether.
Therefore, beaker D: 18 degree Celsius having average kinetic energy of the particles the greatest.
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What would be the diameter of the earth if it had the density of a neutron star
Answer:
At neutron star density, the Earth's whole mass would fit inside a 305-meter-diameter sphere.
Explanation:
if the crumple zone exerts +200,000 N of force on the wall, how much force will the wall exert on the crumple zone?
Answer: -200,000N
(To be more specific, 200,000N in the opposite direction)
Explanation:
By Newton's 3rd law (Action reaction pair)
The crumple zone exerts a force on the wall, the wall will exert an equal but opposite force on the wall.
Same magnitude -> 200,000N
Opposite direction-> Include a negative sign as force is a vector which depends on both magnitude and direction.
Helpppppppppppppppp its timeddddddddddd
Answer:
The answer is the third option.
Explanation:
The electrostatic force, Coulomb's force, is a force that depends on the inverse of the square distance, it is a non-contact force.
On the other hand, stretched spring is a contact force, it needs a contact external force.
Therefore, the answer is the third option.
I hope it helps you!
Light travels in a straight line at a constant speed of 3,0 x 108 m/s for 4,1
years to reach the earth from the nearest star 3.9 x 10"3 km away. What is
its acceleration?
Answer:
As the velocity of light is constant so the acceleration of the light is equal to zero.
a= dv/dt
Explanation:
13. A 50 kg cart is attached to a 75 kg donkey. Two men, each using 100 N of force, try to pull the
cart backward while the horse tries to pull it forward with 500 N of force. What is the net force on the
cart and horse?
\(\\ \sf\longmapsto F_{net}=F_1+F_2\)
\(\\ \sf\longmapsto F_{net}=-100+500\)
\(\\ \sf\longmapsto F_{net}=400N\)
Estimate your de Broglie wavelength while walking at a speed of 1 m/s.
While walking at a speed of 1 m/s, the estimated de Broglie wavelength would be approximately 9.46 x 10^-36 meters.
To estimate the de Broglie wavelength while walking at a speed of 1 m/s, we can use the de Broglie wavelength formula:
λ = h / p,
where λ is the de Broglie wavelength, h is the Planck's constant (approximately 6.626 x 10^-34 J·s), and p is the momentum of the object.
The momentum of an object can be calculated using the equation:
p = m * v,
where p is the momentum, m is the mass of the object, and v is the velocity of the object.
Since we don't have specific information about your mass, let's assume an average adult mass of 70 kg.
Calculating the momentum:
p = 70 kg * 1 m/s = 70 kg·m/s
Now we can use the de Broglie wavelength formula to estimate the wavelength:
λ = 6.626 x 10^-34 J·s / (70 kg·m/s)
λ ≈ 9.46 x 10^-36 m
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suppose that a magnetic field of 1 t goes out of the plane of the page. a straight wire carries a current 1 a from right to left. find the direction of force acting on the wire.
The direction of force acting on the wire is the magnetic field is directed up, in the plane of the page.
Given that,
Magnetic field, B = 1 T
I = 1 A, or current flowing through the wire
The right-hand rule specifies the magnetic force's direction. It claims that when the index, thumb, and middle fingers are held perpendicular to one another, the middle finger will point in the direction of the magnetic force if the index finger is pointing in the direction of a magnetic field and the thumb is pointing in the direction of the flow of current.
By using this criterion, we can see that the middle finger is pointing upward toward the page's horizontal plane.
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the information on a compact disk is scanned by a laser initially at a radius of 2.4 cm and then out to a maximum of 6.0 cm. because the dimensions of the pit information remain constant with radius, the disk motor adjusts so that the tangential velocity remains constant. what is the ratio of the inner to outer rotational frequencies?
The ratio of the inner to outer rotational frequencies is 2.5.
The ratio of the inner to outer rotational frequencies in a compact disk can be calculated using the concept of conservation of angular momentum. When the laser initially scans the disk at a radius of 2.4 cm, the angular velocity of the disk is given by ω1. As the laser moves outwards to a maximum radius of 6.0 cm, the angular velocity of the disk decreases to ω2 due to the conservation of angular momentum. The ratio of the inner to outer rotational frequencies in a compact disk can be found using the concept of conservation of angular momentum and the constant tangential velocity of the disk.
The tangential velocity of the disk, however, remains constant as the dimensions of the pit information on the disk remain constant with radius. This means that the product of the tangential velocity and the radius of the disk is constant, i.e., v1r1 = v2r2.
Using these equations, we can find the ratio of the inner to outer rotational frequencies as
ω1/ω2 = r2/r1 = 6.0 cm/2.4 cm = 2.5.
This means that the inner part of the disk rotates 2.5 times faster than the outer part of the disk. This is because the outer part of the disk has a larger radius and therefore, a larger circumference to cover in the same amount of time as the inner part of the disk.
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For the time between 5 and 9 seconds, calculate the velocity of the car.
(6) Different colors of light correspond to different: (I) frequencies (II) intensities (III) wavelengths (A) I only (B) Il only (C) Ill only (D) I and IlI (E) all of the above
Answer:e all of the above
Explanation:
An electron is moving in the vicinity of a long, straight wire that les along thet-axis. The wire has a constant current of8:80 Ain the -r-direction. At an instant when the electron is at point(0,0. 200 m,0)and the electron I's velocity What is the force that the wire exerts on the electron? isv=(5. 00×10 4m/s) i^−(3. 00×10 4m/s) j^Express your answers in newtons separated by commas. Part 9 Calculate the magnitude of this force. Exprese your answer with the appropriate units
The magnitude of the force that the wire exerts on the electron is 4.41 x \(10^{-14}\) N.
F = q * (v x B)
v = (5.00 x \(10^4\) m/s) i - (3.00 x \(10^4\) m/s) j
B = (μ0 * I) / (2πr)
r = 0.2 m
Substituting the given values, we get:
B = (4π x \(10^{-7}\) Tm/A) * (8.80 A) / (2π * 0.2 m) = 0.0555 T
where T is tesla, the unit of the magnetic field.
Now we can calculate the force using the cross product of v and B:
F = q * (v x B) = -1.602 x \(10^{-19}\) C * [(5.00 x \(10^4\)m/s) i - (3.00 x \(10^4\) m/s) j] x (0.0555 T) k
|F| = 1.602 x \(10^{-19}\) C * 0.0555 T * sqrt((5.00 x \(10^4\) m/s)^2 + (3.00 x \(10^4\)m/s)²) = 4.41 x \(10^{-14}\) N
Magnitude refers to the size or amount of a physical quantity, such as length, mass, or force. Magnitude is a scalar quantity, meaning it has only magnitude and no direction. For example, the magnitude of a force is the amount of force applied to an object, regardless of its direction. If a force of 10 Newtons is applied to an object, the magnitude of that force is 10 Newtons.
Magnitude can also be used to describe the intensity of a physical phenomenon, such as the magnitude of an earthquake or the magnitude of an electric field. In this context, magnitude is a measure of the energy released by the phenomenon. Magnitude is often measured using units that correspond to the physical quantity being measured, such as meters for length or kilograms for mass. In some cases, it may be measured using relative scales, such as the Richter scale for earthquake magnitude.
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Which of the following statement/s is/are true? Check all that apply. Jupiter's Great Red Spot is in the southern hemisphere of the planet The fastest wind speed recorded in our solar system is on the dwarf planet Pluto Neptune's Great dark spot is in the northern hemisphere of the planet Water geyser is located on the South Pole of Saturn's Moon Enceladus The Hexagon hurricane is on the North Pole of the planet Uranus
The true statements are:Jupiter's Great Red Spot is in the southern hemisphere.The fastest wind speed recorded in our solar system is on Neptune.
Among the given statements, only two are true. Jupiter's Great Red Spot, a massive storm, is indeed located in the southern hemisphere of the planet. The Great Red Spot is a prominent feature on Jupiter, visible as a giant swirling storm system. On the other hand, the fastest wind speed recorded in our solar system, reaching speeds of up to 2,100 kilometers per hour (1,300 miles per hour), is found on Neptune.
The strong winds on Neptune contribute to its dynamic atmosphere and the formation of features like the Great Dark Spot. The remaining statements about Pluto, Saturn's moon Enceladus, and Uranus are not true according to our current understanding.
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Solar-powered cars use energy from the Sun to work. A panel on the car absorbs light energy from the Sun, which then generates an electric current. This electric current, in turn, allows the car to move. Which shows the correct order of energy transformations that take place in a solar-powered car? electrical, chemical, kinetic electrical, kinetic, radiant radiant, chemical, electrical radiant, electrical, mechanical
Answer:
radiant, electrical, mechanical :)
Answer:
D
Explanation:
radiant, electrical, mechanical
What is the magnitude of the electric field at 1.20 m distance from a point charge of 4.00 μC?
The magnitude of the electric field at 1.20 m distance from a point charge of 4.00 μC is 149.1 N/C. The magnitude of the electric field is the measurement of the strength of the electric field at a specific point. It is a scalar quantity.
The electric field is produced by a source charge q, measured in coulombs, and is determined by the distance from the charge r, measured in meters, according to Coulomb's law. Coulomb's Law states that: Force of Attraction or Repulsion = k * q₁ * q₂ / r²where,k = Coulomb's constant = 8.99 × 10^9 Nm²/C²q₁ = magnitude of one charge in Coulomb sq₂ = magnitude of other charge in Coulomb sr = distance between the two charges in meters Given that: q = 4.00 μC = 4.00 × 10^-6 C distance = r = 1.20 m Using Coulomb's law we have :Force of attraction = k * q₁ * q₂ / r²= 8.99 × 10^9 * 4.00 × 10^-6 / (1.20)²= 120 N/C. The electric field strength at 1.20 m is 120 N/C.
Therefore, the magnitude of the electric field at 1.20 m distance from a point charge of 4.00 μC is 149.1 N/C (approximately).The magnitude of the electric field at 1.20 m distance from a point charge of 4.00 μC is 149.1 N/C.
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A 40 kg crate is pulled at a constant velocity. The coefficient of kinetic friction is 0.5 and the crate moves 7 m . How much work is done?
A 40 kg crate is pulled at a constant velocity. The coefficient of kinetic friction is 0.5 and the crate moves 7 m . The amount of work done is 140 joule.
What is work done?
When an object is moved over a distance by an external force, at least a portion of that force must be applied in the direction of the displacement.
By multiplying the length of the path by the component of the force acting along the path, work can be calculated if the force is constant. The work W is equal to the force f times the distance d, or W = fd, to mathematically describe this idea.
The work is W = fd cos if the force is applied at an angle of to the displacement. Performing work on a body involves moving it in its entirety from one location to another as well as.
Therefore, A 40 kg crate is pulled at a constant velocity. The coefficient of kinetic friction is 0.5 and the crate moves 7 m . The amount of work done is 140 joule.
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In electrostatic experiments, why is the charged rod used always an insulator?
Insulators, such as glass or plastic, prevent the flow of electric charge, allowing the charged rod to maintain its charge and transfer it to other objects.
In electrostatic experiments, a charged rod is used to transfer charge between objects. The charged rod used in such experiments is always made of an insulator.
An insulator is used because it can hold an electric charge without allowing it to flow freely.
If a conductor, like a metal rod, were used instead, the charge would immediately distribute itself uniformly across the surface of the conductor, and the experiment would not work as intended. Insulators, such as glass or plastic, prevent the flow of electric charge, allowing the charged rod to maintain its charge and transfer it to other objects.
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what is meant by pressure?write its unit.
Answer:
Pressure is the force applied perpendicular to the surface of an object per unit area over which that force is distributed
Unit: Pascal (Pa)
1Pa = 1N/m^2
if two particles have equal momenta, are their kinetic energies equal?
Choose the correct order of the Sun's layers from the center outward. a. corona, chromosphere, photosphere, convective zone, radiative zone, core b. core, magnetosphere, heliosphere, atmosphere c. atmosphere, heliosphere, magnetosphere, core, solar wind d. corona, chromosphere, convective zone, photosphere, radiative zone, core e. core, radiative zone, convective zone, photosphere, chromosphere, corona
The correct order of the Sun's layers from the center outward is e. core, radiative zone, convective zone, photosphere, chromosphere, corona.
The chromosphere is the layer above the photosphere and below the corona. It is characterized by a reddish glow that is visible during a total solar eclipse.
The core is where nuclear fusion occurs, generating the Sun's energy. The radiative and convective zones transport this energy outward. The photosphere is the visible surface of the Sun, while the chromosphere is a layer above it, giving rise to solar phenomena. Finally, the corona is the Sun's outermost layer, characterized by its high temperature and plasma emissions.
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Explain why it is important to identify the health risks in your life
Knowing the risks you and your family may face can help you find ways to avoid health problems.
What is health risk?Health risk can be defined as the chance or likelihood that something will harm or otherwise affect your health. health risk is something that increases your chance of developing a disease.
The main health risk are :
Physical Activity and NutritionOverweight and ObesityTobaccoSubstance AbuseHIV/AIDSMental HealthInjury and ViolenceEnvironmental QualityTherefore knowing the risks and benefits of a medical treatment can help you and your doctor make informed decisions and It can also keep you from fretting over unlikely threats.
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Scientists in the 1800s suggested that the source of the Sun's energy might be gravitational contraction. What was the major flaw of this hypothesis
Answer:
The major flow of this hypothesis was that the Sun could last only about 25 million years.
Explanation:
Gravitational contraction:
It is the process of a cloud's gravity overcoming its internal pressure and causing a collapse. Before the atoms inside will fuse, the core temperature of an object must reach a minimum temperature.If the source of the Sun's energy is gravitational contraction,
from this process we could say that, the Sun could last only about 25 million years, which is far less than the age of Earth. But geologists already had evidence the Earth was much older than that.
So, the major flow of this hypothesis was that the Sun could last only about 25 million years.
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Skyscrapers are made of concrete and glass, concrete and glass are made of sand,so that makes skyscrapers giant sandcastles. Change my mind
Awnswer:
what are the answer chosices
Explanation:
For the displacement field u(x,t)=u
i
e
i
with components given below, calculate the full three dimensional strain at the point p=e
1
+2e
2
+10e
3
u
1
=0.1x
1
x
2
u
2
=0.1x
2
+5
u
3
=500
The full three-dimensional strain tensor at the point
\(p = e_1 + 2e_2 + 10e_3\: is\: :\\epsilon =\left[\begin{array}{ccc}0.05x_2&0.05x_1&0\\0.05&0&0\\0&0&0\end{array}\right]\)
To calculate the full three-dimensional strain at the point \(p = e_1 + 2e_2 + 10e_3\), we need to find the components of the strain tensor \(\epsilon_m_n\).
The strain tensor εₘₙ can be calculated using the formula:
εₘₙ = (0.5) * (∂uₘ/∂xₙ + ∂uₙ/∂xₘ)
Given the displacement field u(x, t) with components:
u₁ = 0.1x₁x₂
u₂ = 0.1x₂ + 5
u₃ = 500
We can calculate the components of the strain tensor as follows:
\(\epsilon_1_1 = (1/2) * (\delta u_1/\delta x_1 + \delta u_1/\delta x_1)\\= (1/2) * (0.1x_2 + 0)\\= 0.05x_2\)
\(\epsilon_1_2 = (1/2) * (\delta u_1/\delta x_2 + \delta u_2/\delta x_1)\\= 0.05x_1\)
\(\epsilon _1_3 = (1/2) * (\delta u_1/∂x_3 + \delta u_3/\delta x_1)\\= (1/2) * (0 + 0)\\= 0\)
\(\epsilon_2_1 = (1/2) * (\delta u_2/\delta x_1 + \delta u_1/\delta x_2)\\= (1/2) * (0 + 0.1)\\= 0.05\)
ε₂₃ = (1/2) * (∂u₂/∂x₃ + ∂u₃/∂x₂)
= (1/2) * (0 + 0)
= 0
ε₃₁ = (1/2) * (∂u₃/∂x₁ + ∂u₁/∂x₃)
= (1/2) * (0 + 0)
= 0
ε₃₂ = (1/2) * (∂u₃/∂x₂ + ∂u₂/∂x₃)
= (1/2) * (0 + 0)
= 0
ε₃₃ = (1/2) * (∂u₃/∂x₃ + ∂u₃/∂x₃)
= (1/2) * (0 + 0)
= 0
Therefore, the full three-dimensional strain tensor at the point
\(p = e_1 + 2e_2 + 10e_3\: is\: :\\epsilon =\left[\begin{array}{ccc}0.05x_2&0.05x_1&0\\0.05&0&0\\0&0&0\end{array}\right]\)
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A car travels 120 km in the first 2 hours and 100 km in the next 2 hours.
What is the car’s average speed?
240 km/h
440 km/h
55 km/h
128 km/h
Please help me with this I’ll mark you Brainly
The picture is above
Answer:
D is correct.
The upward force on the ball must be the same at both locations:
F = M a = 0 = F(upwards) - F(downwards)
If the ball is not being accelerated the upward force must equal the downward force on the ball.
A body has an initial velocity of 12 m s^-1 and is brought to rest over a distance of 45 m. What is the acceleration of the body?
Answer:
-1.46 m/s^2
Explanation:
Write down what is given first:
v0 = 12 m/s
vf = 0 m/s
d = 45 m
We are trying to find acceleration, so we will use the equation vf^2 = v0^2 + 2ad
Plug in the values we have:
0^2 = 12^2 + (2 x 45 x a)
a = - 1.46 m/s^2
Note that this acceleration is negative because the body is slowing down, so the acceleration with be negative, because the change in velocity is negative.
According to the given statement - 1.46 m/s² is the acceleration of the body.
What is a acceleration explain?Acceleration is the rate of change in a moving asteroid's speed and direction over time. When something moves faster or slower, it is considered to be accelerating.
How is acceleration determined?Use the formula a = v / t to determine acceleration, where v stands for the change in velocity and t for the time it took for the change to take place. Use the formula v = vf - vi to determine v, where vf stands for final velocity and vi for starting velocity.
Briefing:Write down what is given first:
v0 = 12 m/s
vf = 0 m/s
d = 45 m
We are trying to find acceleration, so we will use the equation
vf² = v0² + 2ad
Plug in the values we have:
0² = 12² + (2 x 45 x a)
a = - 1.46 m/s²
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would any of these electrolytes conduct electricity in the solid form? explain.
No, electrolyte doesn't conduct electricity when it's solid because it hasn't evolved into ions or charged particles.
Electrolytes are substances that are capable of conducting electricity in both their molten and aqueous states while also undergoing chemical alterations. The electrolyte conducts the electricity due to a dissociation into positively charged particles and negatively charged particles. Electrolytes are substances which conduct electricity in both molten state and aqueous solution but not in solid state. Ions cannot move freely in the solid state because they are fixed. In contrast, ions can freely move in molten form. The ions of salt in the solid state are bonded with strong inter-particle forces. Hence, they are not free to move in a solid state and cannot conduct electricity. But Salt water is the best conductor. This is because salt in an ionic compound and can easily move electrons between positive and negative ions.
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