Answer: The correct answer is "The domains in a temporary magnet easily lose alignment, but the domains in a permanent magnet keep their alignment".
Explanation:
Permanent magnet: Bar magnet is the example of the permanent magnet.
The poles of the temporary magnet can not be changed. The strength of the magnetic field can not be increased or decreased. The domains of the permanent are permanent aligned.
Temporary magnet: Electromagnet is the example of the temporary magnet.
The poles of the temporary magnet can be changed. The strength of the magnetic field can be increased or decreased. If the current will not flow in the electromagnet then it will easily loose its magnetism. The domains in a temporary magnet easily loose alignment.
Therefore, the correct difference between a permanent and a temporary magnet is "The domains in a temporary magnet easily lose alignment, but the domains in a permanent magnet keep their alignment".
Which statement accurately describes radiation?
Radiation needs matter to transfer thermal energy.
Thermal energy is transferred by electromagnetic waves.
Ironing a shirt to take out wrinkles is an example of radiation.
Answer:
Option 2.) Thermal energy is transferred by electromagnetic waves.
Explanation:
just answered it on e2020
An elevator has a weight of 14,700 N and has an acceleration of –0.30 m/s2. The free-body diagram shows the forces acting on the elevator.
To the nearest whole number, what is the force of tension, Ft, acting on the elevator?
450 N
1500 N
14,250 N
15,150 N
The force of tension acting on the elevator is calculated using Newton's second law of motion, considering the elevator's weight and its downward acceleration. After computations, the tension force is found to be approximately 15,150 N.
Explanation:To determine the tension force (Ft) acting on the elevator, we can use Newton's second law of motion, which states that the force is equal to mass times acceleration (F = ma). First, we need to find the mass (m) of the elevator by using the weight (W) of the elevator and the acceleration due to gravity (g), which is approximately 9.81 m/s²:
m = W / g
Therefore, m = 14,700 N / 9.81 m/s² ≈ 1500 kg.
The net force acting on the elevator (Fnet) involves both its weight and the force of tension in the supporting cable, while considering the elevator's downward acceleration:
Fnet = Ft - W = ma
where 'a' is the acceleration of the elevator. Substituting the given values:
Fnet = Ft - 14,700 N = 1500 kg × (-0.30 m/s²)
Ft = 14,700 N + (1500 kg × 0.30 m/s²)
Calculating the terms:
Ft = 14,700 N + 450 N
Ft ≈ 15,150 N.
Therefore, to the nearest whole number, the force of tension acting on the elevator is 15,150 N.
3. Ohm's law is represented by the equation, I = V/R. Explain how the current would change if the amount of resistance decreased and the voltage stayed the same.
Find the emitted power per square meter of peak intensity for a 2600 k object that emits thermal radiation.
Final answer:
To calculate the emitted power per square meter for an object at 2600 K, we use the Stefan-Boltzmann law with a value of 5.67 × 10^-8 W/m^2/K^4 for the Stefan-Boltzmann constant. The result for the given object is approximately 1.53 × 10^7 W/m^2.
Explanation:
Finding the Emitted Power Per Square Meter for a Blackbody
To find the emitted power per square meter (intensity) of peak intensity for an object with a temperature of 2600 K, we will use the Stefan-Boltzmann law, which expresses the power radiated per unit area from a blackbody in terms of the Stefan-Boltzmann constant (σ) and the absolute temperature (T) to the fourth power. The Stefan-Boltzmann law can be written as:
dP/dA = σ T^4,
where σ (Stefan-Boltzmann constant) is approximately 5.67 × 10^-8 W/m^2/K^4. We can calculate the power per square meter by plugging the given temperature into this equation:
dP/dA = (5.67 × 10^-8 W/m^2/K^4) × (2600 K)^4,
After calculating, we find that the power emitted per square meter at peak intensity is:
dP/dA = about 1.53 × 10^7 W/m^2.
Therefore, an object at 2600 K emits approximately 1.53 × 10^7 watts per square meter.
Under what conditions will the projectile have the greatest velocity when it hits the ground?
A worker pushes horizontally on a 34 kg crate with a force of magnitude 110 n . the coefficient of static friction between the crate and the floor is 0.37. (a) what is the frictional force on the crate from the floor?
On his fishing trip Justin rides in a boat 12 km south The fish aren’t biting so they go 4 km west. They then follow a school of fish 1 km north. What distance did they cover? What was their displacement?
The distance is 17 km
The displacement of the boat is about 12 km at 70° S of W
[tex]\texttt{ }[/tex]
Further explanationVector is quantity that has magnitude and direction.
One example of a vector is displacement.
Let us now tackle the problem !
[tex]\texttt{ }[/tex]
This problem is about Vector Diagram.
On his fishing trip Justin rides in a boat 12 km south.
[tex]d_1 = -12 \widehat{j}[/tex]
[tex]\texttt{ }[/tex]
The fish aren’t biting so they go 4 km west.
[tex]d_2 = -4 \widehat{i}[/tex]
[tex]\texttt{ }[/tex]
They then follow a school of fish 1 km north.
[tex]d_3 = 1 \widehat{j}[/tex]
[tex]\texttt{ }[/tex]
[tex]\texttt{Total Distance} = 12 + 4 + 1 = 17 \texttt{ km}[/tex]
[tex]\texttt{ }[/tex]
[tex]d = d_1 + d_2 + d_3[/tex]
[tex]d = -12 \widehat{j} - 4 \widehat{i} + 1 \widehat{j}[/tex]
[tex]d = -4 \widehat{i} - 11 \widehat{j}[/tex]
[tex]\texttt{Total Displacement} = \sqrt{4^2 + 11^2} = \sqrt{137} \approx 12 \texttt{ km}[/tex]
[tex]\texttt{Direction of Displacement} = \theta = \tan^{-1} \frac{11}{4} \approx 70^o \texttt{ south of west}[/tex]
[tex]\texttt{ }[/tex]
Learn moreDirection of Displacement : https://brainly.ph/question/1746541Scalar and Vector : https://brainly.ph/question/274572Weight : https://brainly.ph/question/545327Orientation of Vectors : https://brainly.ph/question/2121753[tex]\texttt{ }[/tex]
Answer detailsGrade: High School
Subject: Physics
Chapter: Vectors
[tex]\texttt{ }[/tex]
Keywords: Local , Race , Driver , Road , Finish , Line , Displacement , Vector , Degree , North , West , South , Kilometres
What is the difference between kinetic and potential energy? what is the difference between kinetic and potential energy? kinetic energy is stored energy and has the capacity to do work; potential energy is expressed through motion. kinetic energy may eventually become potential energy, but potential energy cannot become kinetic energy. kinetic energy and potential energy are synonymous; they are defined as the capacity to do work, actively putting matter into motion. kinetic energy is energy in action, while potential energy is stored energy?
Answer:
kinetic energy of an object possesses kinetic energy due to its motion or movement.the potential energy of an object is due to its position or chemical composition
Explanation:
kinetic energy...various forms are=
thermal energy
motion energy
hydroelectric energy
wind energy
electrical energy
sound energy
various forma of potential energy are...=
chemical energy
Elastic energy
nuclear energy
Gravitational energy.
Oxygen is more reactive than nitrogen.
True
False
Oxygen is more reactive than nitrogen. Because triple bond between two atoms of nitrogen and there is double bond between two atoms of oxygen.Therefore, this statement is true.
What do you mean by the reactivity ?Reactivity is a substance's capacity to chemically react with other compounds. Iron, for instance, reacts vigorously with oxygen. Rust is a reddish powder that is created when it reacts with oxygen.
Because nitrogen has a higher dissociation energy than oxygen, its reactivity is lower than that of oxygen at the molecular level. Due to the triple bond that exists between the nitrogen atoms, the bond length of nitrogen is also shorter than that of oxygen.
Due to the strong triple bond between the atoms, the fact that all the valence electrons are in bonding orbitals, and the fact that more energy is required to excite them, Nitrogen is less reactive than Oxygen in the majority of gaseous processes.
Thus, Oxygen is more reactive than nitrogen.
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A wave with a height of 5 feet and a wavelength of 10 feet has a wave base of?
A. 20ft
B. 10ft
C. 2.5ft
D. 5ft
D. 5ft
Explanation:
The wave base of a wave is the depth at which there is no more perturbation of the medium caused by the wave. The wave base of a wave is determined to be half the wavelength of the wave itself.
In this problem, we have a wave with wavelength of 10 ft, so the wave base is
[tex]b=\frac{\lambda}{2}=\frac{10 ft}{2}=5 ft[/tex]
the cells in your body get energy from the foods you eat. however, your cells must use energy to get this energy. why?
Oasis b is 25 km due east of oasis
a. starting from oasis a, a camel walks 24 km in a direction 19° south of east and then walks 4.0 km due north. how far is the camel then from oasis b?
Final answer:
To find how far the camel is from oasis B after walking 24 km at 19° south of east and then 4 km due north, we use vector components and the Pythagorean theorem.
Explanation:
The problem you're working on is a classic example of vector addition and applying principles of trigonometry to solve for the resultant displacement. The camel starts at oasis A, walks 24 km at a 19° angle south of east, and then walks 4.0 km due north. We're looking to find the distance the camel is from oasis B.
First, we break down the camel's walk into components. The eastward component of the first walk is 24 km × cos(19°), and the southward component is 24 km × sin(19°). After the camel walks 4 km due north, the total southward displacement would be reduced by 4 km. Given that oasis B is due east of oasis A, the eastward component is compared to the 25 km distance between the oases.
To find out how far the camel is from oasis B, we calculate the straight-line distance using the Pythagorean theorem: √((25 km - eastward component)² + (southward component - 4 km)²). Let's calculate these components and solve for the distance.
The eastward component is 24 km × cos(19°) and the reduced southward component is 24 km × sin(19°) - 4 km. Finally, calculate the distance from oasis B using the Pythagorean theorem with the adjusted components.
Which describes the image produced by the lens?
upright and real
inverted and real
smaller than the object and upright
smaller than the object and inverted
The image produced by the lens (diverging lens) will be inverted and real.
Image produced by a converging lens
The following are characteristics of image formed when an object is placed in front of the focal point of a converging lens.
Image is magnifiedVirtual and UprightImage produced by a diverging lensThe images produced by a diverging lens when the object is outside the focal point are;
Real and invertedThus, we can conclude that based on the options given, the image produced by the lens (diverging lens) will be inverted and real.
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Lacie kicks a football from ground level at a velocity of 13.9 m/s and at an angle of 25.0° to the ground. You have determined that the football would travel 15.1 m before landing. How would this value change if the football was kicked at an angle of 35.0°?
When the angle of the kick is changed, the range or distance the football travels will also change. To determine the new range when the angle is changed to 35.0°, calculate the horizontal component of the velocity and find the time it takes for the football to reach the ground. Multiply the time by the horizontal velocity to get the new range.
Explanation:When the football is kicked at a different angle, the range or distance it travels will change. In this case, the original angle of 25.0° resulted in a range of 15.1 m. If the angle is changed to 35.0°, the range will be different. To find the new range, you can use the same initial velocity of 13.9 m/s and apply the new angle of 35.0°. Calculate the horizontal component of the velocity by multiplying the initial velocity by the cosine of the angle. Then use this new horizontal velocity and the initial vertical velocity to calculate the time it takes for the football to reach the ground. Finally, multiply the time by the horizontal velocity to find the new range.
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Jesse is swinging Miguel in a circle at a tangential speed of 3.50 m/s. If the radius of the circle is 0.600 m and Miguel has a mass of 11.0 kg, what is the centripetal force on Miguel? Round to the nearest whole number.
Answer:
Explanation:
When an object is moving around a circular path with a uniform speed the motion os said to be uniform cicular motion. It is the example of accelerated motion as the direction of motion keeps on changing every instant.
When a body is in uniform circular motion, it experiences a force towards the centre of circular path, this force is called centripetal force.
The formula of centripetal force is given by
F = mv^2 / r
Where m is the mass of body, V be the speed of body and R be the radius of circular path
F = 11 × 3.5 × 3.5 / 0.6
F = 224.58 N
Which statement is most nearly the same as Newton's third law?
A) If the net force acting on an object is zero, it does not accelerate.
B) When one object exerts a force on a second object, the first object exerts an equal force on itself in the opposite direction.
C) Acceleration of an object is proportional to net force divided by mass.
D) When you push on an object, it pushes back just as strongly on you.
Answer:
Your answer would be D) When you push on an object, it pushes back just as strongly on you.
Explanation:
This was the only question I had gotten wrong on my test. I thought B would be it, but I can see where the mistake was. According to Britannica.com "The third law is also known as the law of action and reaction". which would fit with D if you think about out.
Hope this helps and Good luck!
What must be your car’s average speed in order to travel 235km in 3.25 hours?
What is the distance from the earth and the sun? Please explain
Even though the Sun has a greater mass than Earth, the Moon orbits Earth because it's ___________________ to Earth than to the Sun.
Final answer:
The Moon orbits Earth instead of the Sun because it is closer to Earth. The strength of gravitational attraction is greater with proximity, despite the Sun's larger mass. The close distance to Earth thus ensures the Moon's stable orbit around it.
Explanation:
Even though the Sun has a greater mass than Earth, the Moon orbits Earth because it's closer to Earth than to the Sun. The gravitational force that an object experiences from another object is not just dependent on the mass but also on the distance between the two objects. In the Earth-Moon system, despite the Moon and the Sun both exerting gravitational forces on each other, the Moon remains in orbit around the Earth because it is much closer to Earth than it is to the Sun.
While the Sun is 27 million times more massive than the Moon, its gravitational pull on the Moon is lesser because it is 387 times farther away from the Earth than the Moon is. The gravitational force decreases with the square of the distance, which means that even a massive object like the Sun exerts a weaker force on the Moon compared to Earth, which is much closer.
Therefore, the Moon's orbit around Earth is stable because the Earth's gravitational pull on the Moon is significantly stronger than that of the Sun's due to the close proximity of the Moon to Earth. In the context of gravitational interactions, this proximity is the key factor in the Moon being Earth's natural satellite.
A runner achieves a velocity of 11.1m/s nine seconds after he begins running. What is his acceleration?
The Black Hills of South Dakota is an example of an eroded _____.
laccolith dlke batholith sill
The Black Hills of South Dakota is an example of an eroded "batholith".
Magma does not generally achieve the surface. In the event that gas weights are not sufficiently extraordinary to constrain the magma to the surface, or if overlying rocks can't be infiltrated by it, the magma may gradually cool and frame an extensive pool of stone. Stone is effortlessly unmistakable by its extensive gem structure and blend of minerals, including light-hued quartzes and darker feldspars and micas. An expansive district of intru-sive molten shake, found profound inside the outside, is known as a batholith. Batholiths can frame the center of a mountain run. This batholith, once framed profound inside Earth's outside layer, is presently uncovered at an elevation surpassing 3300 meters (10,000 ft) above ocean level. The Black Hills of South Dakota are another exemplary case of this sort of geologic development.
How to find friction force given mass and acceleration?
Final answer:
To find the friction force given mass and acceleration, you can use Newton's second law of motion, F = m * a.
Explanation:
To find the friction force given mass and acceleration, you can use Newton's second law of motion. The formula is F = m * a, where F is the force, m is the mass, and a is the acceleration. The force of friction can be calculated using this formula, as long as the acceleration is due to friction.
For example, if you have a mass of 10 kg and an acceleration of 2 m/s² due to friction, the friction force can be found as follows: F = 10 kg * 2 m/s² = 20 N.
Remember to consider the direction of the force and acceleration when interpreting the results.
How is active transport possible since it contradicts the second law of thermodynamics?
When an object is not in motion, it can still have a form of energy. What form of energy does an object have due to its distance from Earth?
a. kinetic energy
b. thermal energy
c. gravitational potential energy
d. electrical potential energy
Answer:
c. gravitational potential energy
Explanation:
Gravitational potential energy is the form of energy possessed by an object which is located at a certain height above the ground. This energy is given by:
[tex]U=mgh[/tex]
where:
m is the mass of the object
g is the gravitational acceleration (g=9.8 m/s^2)
h is the height of the object with respect to the ground
We have to note that gravitational potential energy is always measured with respect to a reference altitude (generally, the ground), because the value of h depends on the point chosen as reference.
which of these measurements has 3 significant digits? A)29.3CM B) 290CM C)0.0029CM D)290.CM
29.3 centimeters from the given list of the measurement would have the three significant digits.
Therefore the correct answer is option A.
What are significant figures?In positional notation, significant figures refer to the digits in a number that is trustworthy and required to denote the amount of something, also known as the significant digits, precision, or resolution.
29.3 centimeters would have the three significant figures.
290 centimeters would have the two significant figures.
0.0029 centimeters would have the two significant figures.
290.0 centimeters would have the two significant figures.
Thus, the three significant digits of 29.3 centimeters from the provided list of the measurement would be the correct answer.
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Which type of environmental scientist is likely to study how different species of birds interact? a. Hydrologist b. Toxicologist c. Oceanographer d. Ecologist Please select the best answer from the choices provided A B C D
Answer: d. Ecologists
Ecologist are scientists who studies the relationship between living things and their surrounding environment, also the relationship between distinct species, interaction among the members of the same species. They surveys the biodiversities, to know such relationships.
When we make our memories consistent with our current beliefs or attitudes, we are experiencing?
A 30 g bullet moving a horizontal velocity of 500 m/s comes to a stop 12 cm within a solid wall. (a) what is the change in the bullet's mechanical energy? (b) what is the magnitude of the average force from the wall stopping it?
The change in mechanical energy of the bullet is 3750 J. The magnitude of the average force from the wall stopping it is 1250 N.
Explanation:(a) The change in mechanical energy of the bullet can be calculated by finding the initial mechanical energy and subtracting the final mechanical energy. Mechanical energy is the sum of kinetic energy and potential energy. Since the bullet comes to a stop, its final kinetic energy is zero. Therefore, the change in mechanical energy is equal to the initial kinetic energy of the bullet. The initial kinetic energy can be calculated using the formula KE = 1/2mv^2, where m is the mass of the bullet (30 g = 0.03 kg) and v is the velocity of the bullet (500 m/s). Plugging in the values:
KE = 1/2(0.03 kg)(500 m/s)^2
KE = 1/2(0.03 kg)(250000 m^2/s^2)
KE = 3750 J
Therefore, the change in mechanical energy of the bullet is 3750 J.
(b) The magnitude of the average force exerted by the wall on the bullet can be calculated using the formula for impulse. Impulse is equal to the change in momentum, and momentum is equal to the product of mass and velocity. Therefore, the equation is:
Impulse = Change in momentum = Force * Time
Since the bullet comes to a stop, its initial momentum is equal to its final momentum, which is zero. Therefore, the impulse is equal to the initial momentum. The initial momentum can be calculated using the formula momentum = mv:
Momentum = (0.03 kg)(500 m/s) = 15 kg*m/s
Now, we can calculate the average force using the equation Impulse = Force * Time:
15 kg*m/s = Force * (12 cm / 100 m)
Force = (15 kg*m/s) / (12 cm / 100 m) = 1250 N
Therefore, the magnitude of the average force from the wall stopping the bullet is 1250 N.
The process of estimating values between measured data points is called
Answer:
The process of estimating values between measured data points is called. interpolation.
Explanation:
Jacob is working on his physics portfolio and stands on a 0.45 m high step. If Jacob’s mass is 103 kg, what is his
potential energy while on top of the step?
Givens
Unkowns
Equation
Substitute
Solve
If you could help fill this in I will medal and give you brainliest answer, really struggling with this and could use a hand if you don't mind :)