The iron filings sprinkled on a piece of paper demonstrate is "the pattern of the magnetic fields lines".
What is magnetic fields?A magnetic field would be a vector field which thus explains the magnetic influence affecting electric charges, electric currents, as well as magnetic materials.
What is iron?The chemical element iron has the atomic number 26 and also the symbol Fe. It is just a metal that would be found in group 8 of such periodic table and the very first transition series.
Therefore, the iron filings sprinkled on a piece of paper demonstrate is "the pattern of the magnetic fields lines".
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An atom that has a negative four charge will have which of the following?Answer 4 more protons than electrons An equal amount of protons and electrons 4 more electrons than protons 2 more neutrons than protons,
An atom with a negative four charge will have 4 more electrons than protons.
An atom that has a negative four charge will have 4 more electrons than protons. This is because the charge of an atom is determined by the difference between the number of protons and electrons. A neutral atom has an equal number of protons and electrons, leading to no net charge. If there are more electrons than protons, the excess negative charges from the electrons result in a negative charge for the atom.
In the case of an atom with a negative four charge, also known as an anion, the atomic charge can be calculated as number of protons - number of electrons. Since each electron has a negative charge equal to the positive charge of a proton, the atom in question with a -4 charge must have four more electrons than protons.
an object which has a mass of 70 kg is sitting on a cliff 10m high calculate the objects potential energy. given g=10m/s^2
A.7,000 Joules
B. 3,500 Joules
C. 700 Joules
D. 70 Joules
E. 35 Joules
Answer: Potential Energy = 7,000 Joules(A)
Explanation:
Potential Energy is the energy possessed by the virtue of its position and it is given as,
P. E = mgh
Where m is the mass= 70kg
g is acceleration due to gravity =10m/s²
h= height = 10m
P. E = 70×10×10
P. E= 7000J
Therefore the potential energy is 7000J
Which has greater force fly hitting windshield of rapidly moving car or the force of windshield hitting fly? Explain
When a fly collides with a moving car's windshield, the force exerted by both on each other is equal in magnitude due to Newton's Third Law of Motion. The differing outcomes (the fly typically being destroyed while the car remains largely unaffected) are a result of the vastly different masses and resulting accelerations, not a difference in the magnitude of force.
When a fly hits the windshield of a rapidly moving car, an interesting physics principle comes into play, known as Newton's Third Law of Motion. This law states that for every action, there is an equal and opposite reaction. Therefore, the force that the fly exerts on the windshield is equal in magnitude to the force that the windshield exerts on the fly during the collision. However, the outcomes are vastly different for the fly and the car due to their significant difference in mass. The car has a much larger mass and therefore experiences a negligible acceleration from the force, while the light-mass fly undergoes a large acceleration, often resulting in its death.
The Third Law of Motion can be counterintuitive because we observe the effects of the forces differently due to the difference in mass and resulting acceleration. But it’s crucial to understand that in terms of the forces experienced by both objects, they are identical. This is why the correct answer is that neither the car nor the fly experiences a greater force than the other in magnitude during the collision.
Which two energy sources can help a star maintain its internal thermal pressure? which two energy sources can help a star maintain its internal thermal pressure? nuclear fission and gravitational contraction nuclear fusion and chemical reactions chemical reactions and gravitational contraction nuclear fusion and gravitational contraction nuclear fusion and nuclear fission?
Answer:
nuclear fission and gravitational contraction
Explanation:
Which two energy sources can help a star maintain its internal thermal pressure? which two energy sources can help a star maintain its internal thermal pressure? nuclear fission and gravitational contraction nuclear fusion and chemical reactions chemical reactions and gravitational contraction nuclear fusion and gravitational contraction nuclear fusion and nuclear fission?
What is Nuclear fission is when a heavy nucleus split to release energy . it splits into two lesser nuclei.
Gravitational contraction:
is when there is collapse of an object in space due to the influence of its own gravity. This two phenomenon makes it possible for a satr to maintain its thermal (heat )pressure.
"which forms of light are lower in energy and frequency than the light that our eyes can see"
Infrared light, microwave radiation, and radio waves are all forms of light that have lower energy and frequency than what our eyes can perceive. These forms of light are part of the electromagnetic spectrum and have various applications in technology.
Explanation:The forms of light that are lower in energy and frequency than the light that our human eyes can see are infrared light, microwave radiation, and radio waves. These forms of light make up part of the electromagnetic spectrum, which ranges from high-frequency, high-energy gamma rays to low-frequency, low-energy radio waves.
In relation to the visible light we see, these energies are less, and therefore their frequencies are also lower. To illustrate, infrared light is just below red light on the spectrum and is often associated with heat radiation. Microwave radiation is commonly used in technologies such as microwave ovens and wireless communication devices, and radio waves are the longest and hence the lowest energy/frequency waves in the spectrum, utilized in broadcasting signals such as television and radio.
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What is the transfer of energy to an object using a force that causes the object to move in the direction of the force?
a. movement
b. power
c. work
d. force?
Which statement describes how echolocation and ultrasound imaging are the same?
A.They both use the absorption of sound waves.
B.They both use the diffraction of sound waves.
C.They both use the reflection of sound waves.
D.They both use the transmission of sound waves.
Answer: The correct option is C.
Explanation:
The sound wave is reflected back after striking from the barrier. This is called the reflection of the sound.
When the sound wave incidents on the barrier then it is called incident wave.
When the sound wave gets reflected back from the barrier then it is called reflected wave.
Ultrasound imaging is a medical technique which is used to take the image of the internal parts of organ of the body.
Echolocation is the process which is used by several species. It is used by bats to locate its prey. It is the biological SONAR.
Therefore, echolocation and ultrasound imaging are same as they both use the reflection of sound waves.
You drive in a straight line at 24.0 m/s for 8.0 miles, then at 30.0 m/s for another 8.0 miles. What is the average velocity?
The transfer of energy as heat caused by the collision of molecules is called _________. radiation convection conduction contact
What is the average acceleration during the time interval 0 seconds to 10 seconds?
a) 0.5 meters/seconds^2
b) 1 meter/second^2
c) 2meters/second^2
d) 3 meters/second^2,
Water vapor is an example of what phase? A. Plasma B. Gas C. Solid D. Liquid
The buoyant force on an object fully submerged in a liquid depends on (select all that apply)
Answer
1. the object’s mass.
2. the object’s volume.
3. the density of the liquid.
4. the mass of the liquid
The buoyant force on an object fully submerged in a liquid depends on the object's volume.and the density of the liquid.
What is buoyant force ?Buoyant force also known as upthrust, is an upward force exerted by a fluid that resists the weight of a partly or completely submerged object.
The weight of the overlying fluid causes pressure to rise with depth in a column of fluid.
The buoyant force on an object fully submerged in a liquid depends on the object's volume.and the density of the liquid.
Hence option 1 and 3 is correct .
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Which statement is true?Select one of the options below as your answer: A. Gas atoms subjected to electricity emit bright lines. B. Gas atoms absorb white light and emit a continuous spectrum of light. C. Gas atoms under high pressure emit dark lines against a continuous spectrum. D. Gas atoms heated to a high temperature emit white light. E. Gas atoms subjected to electricity do not emit a spectrum,
It is weigh-in time for the local under 85 kg rugby team. The bathroom scale used to assess eligibilty can be described by Hooke's law, which is depressed 0.65 cm for its maximum load of 115 kg. What is the spring's effective spring constant?
A player stands on the scale, and it depresses by 0.39cm. What is the mass of the player?,
The effective spring constant of the bathroom scale is approximately 174,738 N/m.
The mass of the player is approximately 69.51 kg.
To determine the spring constant of the bathroom scale, you can use Hooke's law, which relates the force applied to a spring (F) to its displacement (x) and the spring constant (k):
F = -k * x
In this case, we know that the scale depresses 0.65 cm (which is equivalent to 0.0065 meters) under a load of 115 kg. We can use this information to find the spring constant (k):
115 kg * 9.81 m/s² = k * 0.0065 m
Now, solve for k:
k = (115 kg * 9.81 m/s²) / 0.0065 m
k ≈ 174,738 N/m
Hence, the effective spring constant of the bathroom scale is approximately 174,738 N/m.
Now, to find the mass of the player who depresses the scale by 0.39 cm (which is equivalent to 0.0039 meters), you can use Hooke's law again:
F = -k * x
Where:
F is the force exerted by the player's weight (in Newtons)
k is the spring constant (we just found it to be 174,738 N/m)
x is the displacement of the spring (0.0039 meters)
Now, solve for F:
F = -174,738 N/m * 0.0039 m
F ≈ -681.882 N
Since weight is the force due to gravity (F = m * g), where "m" is the mass of the player and "g" is the acceleration due to gravity (approximately 9.81 m/s²), we can find the mass of the player:
m = F / g
m = (-681.882 N) / (9.81 m/s²)
m ≈ -69.51 kg
The negative sign indicates that the player's weight is acting in the opposite direction of the scale's displacement.
Hence, the mass of the player is approximately 69.51 kg.
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A certain force gives a 5-kg object an acceleration of 2.0 m/s2. the same force would give a 20-kg object an acceleration of
Please help me answer these questions ASAP !
Question 2 Saved
What might you look for as evidence that fusion occurs inside a star?
Question 2 options:
antiprotons
protons
electrons
neutinos
The atomic model that describes an atom as a spherical object containing a certain number of electrons trapped in a mass of positive charge is often called ____ model.
This atomic model was developed in 1904 by the British scientist J.J. Thomson, from his discovery of the existence of the electron in 1897.
Taking into consideration that at that time there was still no evidence of the atom nucleus, Thomson thought the electrons (with negative charge) were immersed in a substance (the atom) of positive charge that counteracted the negative charge of the electrons. Just like the raisins embedded in a pudding or bread.
That is why this model was called the raisin pudding atomic model
An Olympic sprinter can go from a state of rest to 11 meters per second in 10 seconds. What is the average acceleration of the sprinter?
A. 0.9 m/s
B. 110 m/s²
C. 110 m/s
D. 1.1 m/s²
@Vonte12,
you can feel the heat waves from small electric heater on your hands and face even though the heater is on the other side of the room this is an example of
Final answer:
Feeling the heat from a heater at a distance is an example of heat transfer by radiation, where electromagnetic waves emitted by the heater are absorbed by the skin, causing a warming sensation.
Explanation:
Feeling the heat waves from a small electric heater on your hands and face, even though the heater is on the other side of the room, is an example of heat transfer by radiation. This occurs when a hot body like a heater emits electromagnetic waves that travel through the space and are absorbed by your skin, warming you without the need for a medium. This type of heat transfer is the same that occurs when we feel the warmth from the Sun or when an oven warms us as we walk by.
A 65 Kg roller-blade is accelerating at 5 m/s/s across the side walk. What force would be necessary for this acceleration to occur?
A box of mass 3.0 kg is accelerated from rest across a floor at a rate of 3.0 m/s2 for 4.0 s . what is the net work
What material is rare in the atmosphere of earth, but common in the atmospheres of mars and venus?
At which of the following angles will the sunlight received at a location on Earth fall over the smallest area? 80° 65° 40° 10°
Answer: D. 10 degree angle
All places on Earth received sunlight but in different angles. The smallest area, which is the north of the Arctic Circle receive sunlight at a 10 degree angle because of the tilted axis of rotation. Usually, the sun’s rays are the most intense at the equator and the least intense at the poles as Earth revolves around the sun.
Answer:
The angle that will fall over the smallest area is 10
Explanation:
explain how a diode is like a one way street
What effect does the removal of vegetation have on soil ?
Suppose you are holding a flat mirror and standing at the center of a giant clock face built into the floor. someone standing at 12 o'clock shines a beam of light toward you, and you want to use the mirror to reflect the beam toward an observer standing at 5 o'clock. what should the angle of incidence be to achieve this? what should the angle of reflection be?
The force in Newtons on a particle directed along the x-axis is given by F(x)=exp(−(x/2)+6) for x≥0 where x is in meters. The particle is constrained to move along the x-axis. Find the work done in Joules on the particle, W, in moving it from x=0 to x=1 using the fact that F=dW/dx. For your reference, 1 Joule = 1 Newton × 1 meter.,
The work done on the particle as it moves from x = 0 to x = 1 meter under the force F(x) = exp(-x/2 + 6) is obtained by integrating the force function over the distance, resulting in a measurable amount of work in Joules.
Explanation:The work done W on a particle as it moves from initial position xi to final position xf under a force F(x) is calculated by integrating the force over the distance. Considering the given force function F(x) = exp(-x/2 + 6), the work done from x = 0 to x = 1 meter is:
W = ∫ F(x) dx
= ∫ exp(-x/2 + 6) dx from x = 0 to x = 1
= ∫ e(-x/2 + 6) dx from x = 0 to x = 1
= -2e(-x/2 + 6) | from x = 0 to x = 1
= -2(e(-1/2 + 6) - e6)
= -2(e(11/2) - e6) Joules
By calculating the definite integral, we can find the total amount of work done in Joules on the particle during this displacement.
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Power can be expressed
1. in joules per watt, or in newtons per second
2. in joules per second, or in watts
3. in joules, or in newton-meters
Power in physics is the rate at which energy is transferred, correctly measured in joules per second or watts. Option 2
Power in physics is defined as the rate at which work is done or the rate at which energy is transferred. This rate is typically measured in joules per second (J/s), which is also known as a watt (W). To clarify the options provided in the question, power cannot be correctly expressed in joules per watt or newtons per second as these do not represent the rate of energy transfer.
Instead, power is correctly expressed in joules per second, which is equivalent to watts. For instance, a device like a light bulb that uses electrical energy to produce light and heat will have its power consumption rated in watts. The higher the wattage, the more power it consumes over a given period of time.
Additionally, power is sometimes measured in units such as the horsepower (hp), where 1 hp equals 746 watts. Furthermore, it is important to realize that terms like kilowatt-hour (kWh) are units of energy, not power. For instance, a 2000-watt iron would use 2 kWh of energy over one hour, which is equal to 2 x 3.6 million joules. Option 2
Ohm’s law is I = V ÷ R. What is the current of a circuit with a 3.0-volt battery and 1.0 ohm of resistance? The current of a circuit with a 3.0-volt battery and 1.0 ohm of resistance is (blank) amps.
Final answer:
Using Ohm's Law, which states I = V / R, the current of a circuit with a 3.0-volt battery and 1.0 ohm of resistance is calculated to be 3.0 amperes.
Explanation:
Calculating Current with Ohm's Law
Ohm's Law describes the relationship between current (I), voltage (V), and resistance (R) in an electrical circuit, stating that I = V / R. To calculate the current in a circuit with a 3.0-volt battery and 1.0 ohm of resistance, you would use the formula I = V / R. Plugging the values into the formula gives us I = 3.0 V / 1.0 Ω, which simplifies to I = 3.0 A. Therefore, the current of the circuit would be 3.0 amperes.