B and C are right for apex!!
How can you magnetize an item that is ferromagnetic?
heat it
spin it
rub it with a soft cloth
place it in a magnetic field
Answer:
place it in a magnetic field
Explanation
Ferromagnetic materials are made up of small domains which are randomly oriented in it. Due to this random orientation of all domains they do not produce any magnetic field in its surrounding.
When we put ferromagnetic substance in external magnetic field then due to this all small domains in ferromagnetic substance will experience torque and try to align in the direction of external magnetic field.
Due to this alignment of all domains it produce it's own magnetic field in the direction of external magnetic field.
This phenomenon is known as magnetization.
So here correct answer would be
place it in a magnetic field
what are 2 ways electromagnets are used
if 500 watts hit the surface of a solar panel every second and it generates 150 watts every second, how efficient is it?
The efficiency of the solar panel is 30%. This is determined by dividing the power generated by the panel (150 watts) by the power that hits the surface of the panel (500 watts).
Explanation:The efficiency of a solar panel can be calculated by dividing the output power by the input power. Here, the solar panel is receiving an input of 500 watts every second and generates 150 watts every second. Therefore, the efficiency is calculated as 150W / 500W = 0.3, or 30%. So, the solar panel is 30% efficient.
This efficiency is actually quite decent for a typical solar panel as most panels operate at around 15-20% efficiency. Factors impacting the efficiency include the amount and angle of sunlight, ambient temperature, and the type and configuration of the solar cells within the panel.
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A 50kg child on a skateboard experiences a 75n force as shown what is the expected acceleration of the child?
The acceleration of the 50kg child on a skateboard experiencing a 75N force can be calculated using Newton's second law of motion (F=ma). Plugging the given values into this equation, we get an expected acceleration of 1.5 m/s².
To calculate the expected acceleration of the child on the skateboard experiencing a 75N external force, we can employ Newton's second law of motion, which states that the acceleration of an object is equal to the net force acting on it divided by its mass (a = F/m).
In this case, the force (F) is 75N and the mass (m) of the child is 50kg.
Now by simply plugging the values into the equation we get a = 75N / 50kg = 1.5 m/s².
So, the expected acceleration of the child on the skateboard, given a force of 75N, is 1.5 m/s².
This result assumes no other forces are involved (like friction) and the force is applied in the direction of motion.
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3. Predict which of the following ions would be likely to form: _____ a. Na2+ _____ b. Cl+ _____ c. Ca2+ _____ d. Br– _____ e. Ne– _____ f. Ne+
Explanation:
Ions are the species which form when a neutral atom either loses or gain an electron.
Atomic number of sodium is 11 and it is able to lose only one electron to attain stability. Hence, it will always form [tex]Na^{+}[/tex] ion.
Atomic number of chlorine is 17 and being a non-metal it needs an electron to completely fill its octet. Hence, a neutral atom of Cl by gaining an electron change into [tex]Cl^{-}[/tex] ion.
Atomic number of calcium is 20 and it needs to lose two electrons to become stable in nature. Hence, it will become a [tex]Ca^{2+}[/tex] ion.
Atomic number of bromine is 35 and it being a non-metal it needs an electron to completely fill its octet. Hence, a neutral atom of Br by gaining an electron change into [tex]Br^{-}[/tex] ion.
Atomic number of neon is 10 and it has completely filled octet. So, it neither needs to gain or lose an electron.
Hence, neon atom will remain neutral in nature.
Thus, we can conclude that out of the given options only [tex]Ca^{2+}[/tex] and [tex]Br^{-}[/tex] ions would be likely to form.
Famously formulated by Einstein's equation E = mc2, the principle of ______ - _______ equivalence states that the mass of a body is a measure of its energy content.
Correct Answer: mass-energy
Answer:
mass energy
Explanation:
which term best describes the movement of waves and how they interact with one another?a.wave shape b.wave velocity c.wave behavior d.wave chemistry
The correct choice is
c.wave behavior.
wave behavior consists of refraction , reflection , interference . refraction talks about the movement of wave when it travels from one medium to another. reflection talks about how wave return back to same medium where it came from after hitting a surface. interference deals with how waves interact with each other.
So correct choice is wave behavior.
Within visible light, violet has the lowest frequency.
a. True
b. False
What is the electric field at a position that is 1.6m East of a point charge of 7.2 x 10^-6C?
Final answer:
The electric field at a position 1.6m East of a point charge of 7.2 x 10^-6C can be calculated using Coulomb's Law. The electric field is 25.2 N/C.
Explanation:
The electric field at a position 1.6m East of a point charge of 7.2 x 10^-6C can be calculated using Coulomb's Law. Coulomb's Law states that the electric field at a point is directly proportional to the magnitude of the charge and inversely proportional to the square of the distance.
The formula to calculate the electric field is:
E = k * q / r^2
where E is the electric field, k is the electrostatic constant, q is the charge, and r is the distance.
Plugging in the values:
E = (9 x 10^9 Nm^2/C^2) * (7.2 x 10^-6C) / (1.6m)^2
E = 25.2 N/C
Therefore, the electric field at a position 1.6m East of the point charge is 25.2 N/C.
Newton's Second Law of Motion states
A) for every action there is an equal and opposite reaction
B) a body will remain at rest unless acted upon by an unbalanced force
C) a body will move with uniform motion in a straight line, unless acted upon by an unbalanced force
D) the force acting on a body equals the rate of change of momentum
On Earth, water can exist as a solid, a liquid, or a gas. Why?
Explanation:
The Earth has perfect conditions which allows water to exist in all the three states. These conditions are:
1. Earth is in the Goldilocks zone around the Sun which results in an optimum temperature.
2. The atmosphere of the Earth maintains suitable temperature and pressure.
The presence of water in all the three forms helped the life to develop on Earth.
Which of the following is an inelastic collision?
What energy transformation takes place when you climb a ladder?
The energy transformation takes place when you climb a ladder is Kinetic energy to the Potential Energy.
What is Kinetic and Potential Energy?The process we needed to do work is called energy. Energy can be classified in various forms like kinetic, potential, thermal, nuclear etc.The total energy of a system can be defined as by the addition of kinetic and potential energy of the system. When the object is in motion, then the energy can be described as the Kinetic energy.Total energy = kinetic energy + potential energy
(If we make Kinetic energy the subject of the formula, we have)
kinetic energy = total energy - potential energy
When an particle is in motion then the energy of the object posses is called kinetic energy.
When energy is stored in an particle that is depending on its location is called potential energy.
Kinetic and potential energy can get transmuted into each other.
Therefore, when you climb a ladder, then the kinetic energy gets transformed into potential energy.
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A sheet of aluminum (al) foil has a total area of 1.000 ft2 and a mass of 3.716 g. what is the thickness of the foil in millimeters (density of al = 2.699 g/cm3)?
The thickness of foil having total area of 1ft² and mass of 3.716g is 0.451 millimeters.
Given, that the aluminum foil has a total area of 1.000 ft^2 and a mass of 3.636 g.
To find the thickness of the foil, calculate its volume.
The volume of the foil can be determined by multiplying its area by its thickness. Since the area is given in square feet, we need to convert it to square centimeters.
To convert the area from square feet to square centimeters, we use the conversion factor:
1 ft = 30.48 cm.
So, the area of the foil is 30.48 cm².
Let's assume the thickness of the foil is 'd' centimeters. The volume of the foil can be expressed as 30.48 cm² * d cm³.
Using the density formula, we have: density = mass / volume. Rearranging the formula, we get: volume = mass / density.
Plugging in the values,
Volume = [tex]3.716 g / 2.699 g/cm^3[/tex].
Volume = 1.376cm³
Equating the volume,
(30.48 cm)^2 * d = 1.376 cm^3.
Solving for 'd', we divide both sides of the equation by (30.48 cm)^2. This gives us:
[tex]d = 1.376 cm^3 / (30.48 cm)^2[/tex]
d= 0.0451 cm.
Finally, to express the thickness in millimeters, multiply 'd' by 10.
This gives the thickness of the foil as approximately 0.451 mm.
Therefore, the thickness of the aluminum foil is approximately 0.451 mm.
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To determine the thickness of aluminum foil with provided mass and area, the volume is first calculated by dividing the mass by the density of aluminum. Then, the area is converted from square feet to square centimeters, and finally, the volume is divided by the converted area to get the thickness in millimeters.
Explanation:The thickness of a piece of aluminum (Al) foil can be calculated knowing its mass, area, and the density of aluminum. First, we need to find the volume of the aluminum, which can be done by dividing the mass by its density. Since the density is provided in g/cm³ and the mass in grams, we skip any conversion for these two. However, we have the area in ft² which needs to be converted to cm² (1 ft² = 929.0304 cm²).
To find the volume (V) in cm³, we use the formula V = mass / density. In this case, V = 3.716 g / 2.699 g/cm³ = 1.3764 cm³. Now, we convert the area from ft² to cm²: area = 1.000 ft² * 929.0304 cm²/ft² = 929.0304 cm². The thickness (T) in cm can now be found by dividing the volume by the area T = 1.3764 cm³ / 929.0304 cm² = 0.00148 cm or 0.0148 mm when converted to millimeters.
Covalent bonds form because most atoms seek to have how many electrons in their outermost shell?
1
8
4
3
Covalent bonds form because most atoms seek to have eight electrons in their outermost shell
What is a Covalent bond?A covalent bond is formed when two atoms exchange one or more pairs of electrons. The two atomic nuclei are concurrently drawing these electrons to them.
The octet rule is a general principle that states that atoms tend to gain, lose, or share electrons in order to achieve a stable configuration with a full outermost shell of 8 electrons (or 2 electrons in the case of hydrogen and helium). This is because a full outermost shell gives the atom greater stability and a lower energy state.
Atoms can achieve a full outermost shell through the formation of covalent bonds, in which two or more atoms share pairs of electrons to fill their outermost shells.
Most atoms seek to have 8 electrons in their outermost shell, which is also known as the octet rule.
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What causes convection in the Earth's mantle layer?
Why is HIV difficult to treat? Check all that apply.
On top of this, HIV can even kill uninfected immune system cells, a phenomenon we are just beginning to understand. This is why HIV is named the “human immunodeficiency virus”. When the immune system is damaged, it is treacherously difficult for your body to fight against HIV or other opportunistic infections.
I HOPE IT HELPSExplain how cognitive psychologists combine traditional conditioning models with cognitive processes.
Final answer:
Cognitive psychologists combined behaviorism's approach with cognitive processes by accounting for mental activities like thinking and reasoning as crucial factors in behavior. Cognitive learning emphasizes mental manipulation of information and complex language use, offering a richer perspective on learning beyond simple conditioning.
Explanation:
Cognitive psychologists have integrated traditional conditioning models with cognitive processes to form a more comprehensive understanding of human learning and behavior. Where behaviorists emphasized the role of the environment in shaping behavior through stimulus-response-reinforcement patterns, cognitive psychologists argue that cognitive processes like thinking, reasoning, and interpreting are crucial in how individuals act.
The notion of cognitive learning suggests that humans, and some other intelligent animals, are more adept at learning through the manipulation of information with their minds, such as imitating behavior, taking instruction, and utilizing complex language. This form of learning enables the formation of mental images, imagining changes, and anticipating consequences, which encompasses visual processing, memory, and sensory inputs.
Cognitive theory's application to therapy, most notably through the work of Aaron Beck, provided further evidence of its efficacy. This has helped cognitive psychology become a respected area within the study of personality and abnormal psychology. Cognitive approaches have furthered our understanding of behavior by considering the mental evaluation and interpretation of stimuli.
Which listed property of alternating current is the MOST LIKELY reason it was chosen over direct current to provide electricity across the country?
Answer:
d
Explanation:
can be transformed to different voltages
The potential difference in a simple circuit is 2 v and the resistance is 2 ω . what current flows in the circuit? answer in units of
a.
[tex]what is a jule in physics[/tex]
which best describes cosmic microwave background radiation
Answer:
radiation from the big bang
Explanation:
Heat of Fusion How much thermal energy is needed change 50.0 g of ice at -20.0°C to water at 10.0°C?
Five equal-mass particles (a–e enter a region of uniform magnetic field directed into the page. they follow the trajectories illustrated in (figure 1 . part a which particle (if any is neutral?
Particle D is neutral
Further explanationMagnetic fields can be generated by:
1. a moving charge 2. current element 3. straight electrical wire 4. electrical wire coiledThe charge of a moving electron experiences a magnetic force.
The magnetic force (Lorentz) acting on a charge moving in a magnetic field is:
F = B i l sin αF = magnetic force, N
B = magnetic induction, Wb / m²
i = electric current, A
l = length of conductor, m
α = angle between current and magnetic field
The path traveled by the charge over time is proportional to velocity (v = l / t), while the current I = q/t
so the magnetic force equation becomes
F = Bqv sin aIf we look at the picture, the particle enters the magnetic field perpendicularly so that the magnetic force functions as a centripetal force
F = Bqv sin 90 = m.ac (ac = centripetal acceleration)
[tex]\displaystyle Bqv=m\frac{v^2}{r}[/tex]
[tex]\displaystyle r=\frac{mv}{Bq}[/tex]
From this equation shows that the radius of the path of a particle is proportional to its linear velocity
From the picture also shows that particle D is not deflected in a magnetic field, so that the path moves straight, so the magnetic force = 0, can also show neutral charged particles because there is no magnetic force acting on it
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resultant velocity
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Keywords: Centripetal force, linear velocity, magnetic force, Lorentz
PLEASE ANSWER ASAP
Most scientists recommend reducing carbon dioxide emissions. Less carbon dioxide in the atmosphere would be expected to reduce the rate of global warming increase damage caused by acid rain decrease the number of biotic factors in ecosystems reduce destruction of the ozone layer
Explain how internal reflection plays an important part in the making of a rainbow.
Explain where most of the mass of an atom is located. Also, explain why some particles that make up the atom do not contribute much to its mass.
The time it takes for one wavelength to pass a fixed point is known as:
Answer:
A
Explanation:
Round your answers to one decimal place.this parallel circuit has two resistors at 15 and 40 ohms. what is the total resistance? ωif there is a 12 v battery in the circuit, what would the approximate current be? a
10.9Ohms
1.1A i did it on Edge and it was correct
Resistance in wires causes electrical energy to be converted to what form of energy? sound chemical energy nuclear energy thermal energy
Final answer:
Resistance in wires causes electrical energy to be converted to thermal energy.
Explanation:
When electric current flows through a wire that has resistance, the electrical energy is not lost but transformed into another form. We observe this phenomenon according to the principle of conservation of energy. As charged particles or electrons move through a resistive medium such as a wire, they collide with the ions in the atomic lattice structure of the wire, which causes them to lose some of their kinetic energy. This lost kinetic energy gets converted into heat due to the frictional forces analogous to those experienced when a crate is pushed across the floor. These microscopic collisions generate heat, thus converting the original electrical energy into thermal energy. This process is known in physics as resistive heating, which is a fundamental concept in understanding the behavior of electric circuits and the impact of resistance within them.