Which of the following statements is true?
A.
Most metals and nonmetals conduct electricity well, but metals cannot conduct heat.
B.
Most nonmetals can be drawn into a wire, while metals would break apart.
C.
Most metals and nonmetals conduct heat well, but nonmetals cannot conduct electricity.
D.
Most metals can be drawn into a wire, while nonmetals would break apart.
Answers
Answer:
D. Most metals can be drawn into a wire, while nonmetals would break apart
Explanation:
The correct statement from the given choices is that most metals can be drawn into a wire while non-metals would break apart.
Metals are malleable due to the presence of metallic bonds between their atoms. The large electron cloud due to the electropositivity of metals allows for the wide range of physical properties observed in them.
Metals are also conductors because they have free mobile electrons. Therefore they can conduct heat and electricity.Non-metals are brittle and cannot conduct neither heat nor electricity.
Related Questions
what is someones target heart rate at 70% at age 17
Answers
Answer: normal
Explanation:
Which of the following are true for sinusoidal radiation?
The radiation pattern does not change with distance.
The radiation travels perpendicular to the electric field.
Oscillating charges are not accelerating.
The electric field and the magnetic field have the same magnitude at the same point in space.
The radiation pattern does not change with time.
The radiation travels perpendicular to the magnetic field.
The electric field is perpendicular to the magnetic field.
The propagation direction of the radiation can be determined from the right hand rule.
The source of the radiation is oscillating charges.
Answers
The true statements are - 1. The radiation pattern does not change with distance.4.The electric field and the magnetic field has the same magnitude at the same point in space. 5. The radiation pattern does not change with time.7.The electric field is perpendicular to the magnetic field.8.The propagation direction of the radiation can be determined from the right-hand rule. 9. The source of the radiation is oscillating charges.
The following statements are true for sinusoidal radiation:
(True) . Sinusoidal radiation maintains the same pattern as it propagates through space. The pattern does not change as the distance from the source increases.(False) . The radiation travels perpendicular to both the electric field and the magnetic field. The electric and magnetic fields are mutually perpendicular and perpendicular to the direction of propagation. (False) . Oscillating charges are indeed accelerating. The motion of charges back and forth creates changes in the electric and magnetic fields, leading to the emission of electromagnetic radiation.(True). In sinusoidal radiation, the electric and magnetic fields are closely related. At any given point in space, the magnitudes of the electric and magnetic fields have the same value, but they may have different orientations. (True) . The radiation pattern remains constant over time. Sinusoidal radiation has a periodic behavior, meaning the fields repeat their patterns with the same frequency over time. (False) . As mentioned earlier, sinusoidal radiation travels perpendicular to both the electric and magnetic fields, and the fields are mutually perpendicular to each other.(True) .The electric and magnetic fields in sinusoidal radiation are perpendicular to each other. They form a right-angle relationship, and their orientations are mutually perpendicular to the direction of propagation. (True) .The right-hand rule can be used to determine the relationship between the direction of propagation, electric field, and magnetic field in sinusoidal radiation. (True) .Sinusoidal radiation is produced by oscillating charges. When charges accelerate or change their velocity, they generate changing electric and magnetic fields that result in the emission of electromagnetic radiation.Learn more about electromagnetic ;
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how the x ray use the behavior and characteristics of the electromagnetic wave to function.
Answers
Answer:
How do X rays use electromagnetic waves to function?
X-rays are very high-frequency waves and carry a lot of energy. They will pass through most substances, making them useful in medicine and industry to see inside things. An X-ray machine works by firing a beam of electrons at a "target." If we fire the electrons with enough energy, X-rays will be produced.
Explanation:
A solenoid has a net length of 2 m, a radius of 10 cm, and a current of 4 A running through it. The solenoid is comprised of 500 turns. What is the magnitude of the magnetic field in the solenoid?A) 0.2 T B) 0.4 T C) 0.6 T D) 1.0 T E)Â 1.26Â T
Answers
The magnitude of the magnetic field in the solenoid is 0.0126 T is not among the given options, there might be a typo in the problem or the answer choices.
Please double-check the given data and choices.
To find the magnitude of the magnetic field in the solenoid, we'll use the formula for the magnetic field inside a solenoid:
B = μ₀ * n * I
Where B is the magnetic field, μ₀ is the permeability of free space (4π x 10⁻⁷ Tm/A),
n is the number of turns per unit length, and I is the current.
First, let's calculate the number of turns per unit length (n):
n = total turns / length = 500 turns / 2 m = 250 turns/m
Now, plug the values into the formula:
B = (4π x 10⁻⁷ Tm/A) * (250 turns/m) * (4 A)
B ≈ 0.004π T ≈ 0.012566 T ≈ 0.0126 T.
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Question: A solenoid has a net length of 2 m, a radius of 10 cm, and a current of 4 A running through it. The solenoid is comprised of 500 turns. What is the magnitude of the magnetic field in the solenoid?A) 0.2 T B) 0.4 T C) 0.6 T D) 1.0 T E)Â 1.26Â T
6. The Highway Code says that at 20 m/s, the
reacting (thinking) distance of a driver is 14 m,
and the brakes take 3 seconds to halt the car.
a) What is the reaction time in this case?
b) Plot a velocity-time graph for these data
(assume the brakes are on steadily for 3 s).
c) Use the graph to estimate the speed at
which the driver would hit a wall 3
seconds after first noticing it.
Answers
Answer:a) The reaction time can be calculated by dividing the reacting distance by the velocity:
Reaction Time = Reacting Distance / Velocity
Reaction Time = 14 m / 20 m/s
Reaction Time = 0.7 seconds
b) To plot a velocity-time graph, we can assume that the velocity remains constant at 20 m/s until the driver applies the brakes. Then, the velocity decreases linearly to zero over a period of 3 seconds.
The graph would have the following characteristics:
The velocity remains constant at 20 m/s for the initial time.
After 3 seconds, the velocity decreases linearly to zero.
The graph would be a horizontal line at 20 m/s for the first 3 seconds and then a straight downward line reaching zero velocity at the end of the 3-second period.
c) Since the graph shows a linear decrease in velocity, we can estimate the speed at which the driver would hit a wall 3 seconds after first noticing it by looking at the velocity at that time.
From the graph, at 3 seconds, the velocity would be zero, indicating that the car would have come to a complete stop. Therefore, the estimated speed at which the driver would hit the wall is 0 m/s.
Explanation:
A bowl of soup is placed on the surface of a stovetop to warm for lunch. This heat is most likely transmitted by which of the following?
Answers
The eat in the bowl of soup placed on the surface of a stovetop, is most likely transmitted by C. convection and conduction.
What are convection and conduction?Convection is the transfer of heat through a fluid (liquid or gas) by the movement of molecules. As the soup heats up, the molecules at the bottom of the bowl become more energetic and move faster.
Conduction is the transfer of heat through direct contact. As the bottom of the bowl heats up, the heat is conducted through the metal of the bowl and into the soup. The soup then conducts the heat throughout its volume.
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Options are:
Convection only
Radiation only
Convection and conduction
Radiation and conduction
A 480 Ω resistor is connected in series to a 360 Ω resistor and a 120-V power supply.
a. Draw the circuit.
Answers
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Who was the first person to walk on the moon ?
Answers
Answer:
god correct correct
Explanation:
Calculate the orbital period of a satellite circling the Earth at an altitude of 3500 km. Answer to the nearest minute. Show your work.
Answers
The orbital period of the satellite circling the Earth at an altitude of 3500 km is 163 minutes
How do i determine the orbital period?The orbital period for the satellite circling the Earth at an altitude of 3500 km can be obtained as follow:
Altitude = 3500 kmRadius of earth = 6400 KmSemi-major axis (a) = Radius + Altitude = 6400 + 3500 = 9900 Km = 9900 × 1000 = 9900000 mGravitational constant (G) = 6.67×10¯¹¹ Nm²/Kg²Mass of earth (M) = 5.987×10²⁴ KgOrbital period (T) = ?T² = (4π² / GM) × a³
T² = [(4 × 3.14²) / (6.67×10¯¹¹ × 5.987×10²⁴)] × 9900000³
Take the square root of both sides
T = √[((4 × 3.14²) / (6.67×10¯¹¹ × 5.987×10²⁴)) × 9900000³]
T = 9789.15 s
Divide by 60 to express in minutes
T = 9789.15 / 60
T = 163 minutes
Thus, we can conclude that the orbital period of the satellite is 163 minutes
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What physical property does the symbol I_enclosed in problem 23 represent? A. The total current passing through the loop in either direction B. The net current through the loop C. The current in the path in the opposite direction from the magnetic field D.The current along the path in the same direction as the magnetic field
Answers
The symbol I_enclosed in problem 23 represents the net current through the loop, which is the algebraic sum of all the currents passing through a closed loop or surface.
When a closed loop is placed in a magnetic field, a current is induced in the loop due to the changing magnetic flux.
The induced current produces its own magnetic field, which interacts with the external magnetic field, resulting in a force on the loop.
The magnitude and direction of this force depend on the strength of the magnetic field, the current in the loop, and the geometry of the loop.
The net current through the loop is the sum of all the currents passing through the loop, taking into account the direction of the current.
If the currents flow in opposite directions, their contributions cancel out, resulting in a net current of zero.
Therefore, in problem 23, the symbol I_enclosed represents the net current passing through the loop, which determines the strength of the magnetic force on the loop in the presence of an external magnetic field.
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For a sled sliding down a frictionless slope with a constant inclination, the acceleration of the sled is?
Answers
The acceleration of the sled is, the acceleration is equal to the acceleration of gravity multiplied by the sine of the angle for a frictionless incline of degree.
How fast is an inclined plane without friction moving?The acceleration is equal to the acceleration of gravity multiplied by the sine of the angle for a frictionless incline of degree.The measure of the force applied by any surface is its acceleration. The motion is stopped on the frictionless surface by the friction force, which is meant to do so. Acceleration on frictionless surfaces is equal to zero since the net forces acting on the body are eliminated.The sine of the incline angle, (), determines how quickly something accelerates. The angle of inclination equals 90° when sin is equal to 1. It's the same as falling freely. The slope of the acceleration vs sin graph can then be used to calculate the acceleration during free fall.To learn more about acceleration refer to:
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What does oxygen deficit represent?
Answers
Answer: It represents a small amount of oxygen being taken into the body when the body consumes more oxygen than what is being intake
Explanation: to be deficit means the amount of something is too small and there for oxygen deficit is a too small amount of oxygen.
What units are used to measure the magnitude of a vector?
-Grams
-Newtons
-Liters
-Pounds
Answers
Answer:
Newtons
Explanation:
Its units are newtons because force has both magnitude and direction.
help me with this pls
Answers
Answer:
8000J,100J,20
Explanation:
Wi =E×SE =400N × 20cm =8000J
Wo=L×SL=20N×5.0 m=100J
MA =L/E =400N/20N =20
The potential difference between the ends of a wire is 1.5 V, and it conducts 2.5 A of current. The length of the wire is 2.0 m. What is the resistance of the wire, and what is the magnitude of the electric field in the wire?
Answers
The resistance of the wire is 0.6 ohms. The magnitude of the electric field in the wire is 0.75 V/m.
To find the resistance of the wire, we can use Ohm's Law, which states that the resistance (R) is equal to the ratio of the potential difference (V) across a conductor to the current (I) flowing through it:
R = V / I
Given that the potential difference V is 1.5 V and the current I is 2.5 A, we can calculate the resistance:
R = 1.5 V / 2.5 A = 0.6 Ω
Therefore, the resistance of the wire is 0.6 ohms.
To find the magnitude of the electric field in the wire, we can use the relationship between the electric field (E), potential difference (V), and distance (d). For a uniform electric field in a straight wire, the electric field is given by:
E = V / d
Given that the potential difference V is 1.5 V and the length of the wire (distance) d is 2.0 m, we can calculate the magnitude of the electric field:
E = 1.5 V / 2.0 m = 0.75 V/m
Therefore, the magnitude of the electric field in the wire is 0.75 V/m.
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A skateboarder, starting from the top of a ramp 4,5 m above the ground, skates down the ramp. The mass of the skateboarder and his board is 65 kg
Answers
Answer:
Kinetic energy is 2886.5Joule
See image for solution
6. The transfer of thermal energy by radiation does not require matter.
O True
O False
Answers
Answer:false
Explanation:
The colors of a soap bubble or oil slick are due to __________. two-slit interference thin-film interference huygens' principle diffraction
Answers
Answer:
Thin film interference
When measuring the mass of a condensed volatile liquid collected, you need to correct its mass by the mass of the air lost in the process.
Answers
Correction of the mass of the volatile liquid that is subjected to a condensation process is required because part of the vapors that circulate through the system do not condense, and these can go to the atmosphere or be collected by another system.
Principles of the condensation systemThe collection of the volatile condensed liquid is generally carried out in a piece of equipment (condenser) that has pipes through which the vapors of the element circulate and through which they pass to the liquid phase, decanting it at the end of the system.
Loss of mass in the condensation systemTo treat the greatest amount of vapors to be condensed, the pipe can be lengthened (number of steps) through which they circulate or the temperature of the condenser element with which they exchange heat (usually water) can be lowered.
However, even in high efficiency systems there will always be a certain percentage of vapors that do not condense, so it will be necessary to make a correction to the mass of liquid collected.
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what is the mass of a vehicle that has 50,000 N and 25M/S/S
Answers
Answer:
F = 1250000 N
Explanation:
If you have 50,000 S, by 25 M. It would be calculated to 1,250,000 N.
What is the exact value of sin 60°? radical 3 over 2 radical 2 over 2 one half 0
Answers
The precise value of sin 60 degrees is 3/2, as solved by trigonometry.
What is the value of sin 60°?0° Cos = Sin 90° = 1
Cos 30°= Sin 60°= 1/32
45° Cos = Sin 45° = 1/2
60° Cos = Sin 30° = 1/2
90° Cos = Sin 0° = 0
Also,
Tan 0 degrees = Sin 0 degrees/Cos 0 degrees = 0 degrees
Tan 30 degrees = Sin 30 degrees/Cos 30 degrees = 1/3
Tan 45 degrees = Sin 45 degrees/Cos 45 degrees = 1
Sin 60°/Cos 60° = 3
Sin 90°/Cos 90°= Tan 90°
The above trigonometric ratio values are in degrees. We can also talk about the values in terms of radians. Radians are used for unit circles with radius one. The radian is represented as.
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A sine wave is observed on a CRO screen. The time base setting is 10 m/sec/division and a voltage setting is 0.5 volt/division. The peak to peak height is 8 cm. The time period for1 Hz is cm.
Calculate: a) the peak voltage;
b) ohm ms voltage; and
c) frequency observed on the screen.
2. The frequency of sine wave is measured using a CRO (by comparison method) by a spot wheel type of measurement. lf the signal source has a frequency of 50 Hz and the number!
Answers
a) Peak voltage: Given, Voltage setting = 0.5 V/division Peak to peak voltage, Vpp = 8 cm = 4 divisions Peak voltage, Vp = Vpp / 2 = 4 cm = 2 divisions∴ Peak voltage = 2 × 0.5 = 1 VB) RMS voltage: Given, Voltage setting = 0.5 V/division Peak to peak voltage, Vpp = 8 cm = 4 divisions RMS voltage, Vrms= Vp/√2= 1/√2=0.707 V∴ RMS voltage = 0.707 Vc).
The frequency observed on the screen: The time period for 1 Hz = Time period (T) = 1/fThe distance traveled by the wave during the time period T will be equal to the horizontal length of one division. Therefore, the length of one division = 10 ms = 0.01 s Time period for one division, t = 0.01 s/ division. We know that the frequency, f = 1/T= 1/t * no. of divisions. Therefore, f = 1/0.01 x 1 = 100 Hz Thus, the frequency observed on the screen is 100 Hz.2) The frequency of a sine wave is measured using a CRO (by comparison method) by a spot wheel type of measurement.
If the signal source has a frequency of 50 Hz and the number of spots counted in 1 minute was 30, calculate the frequency of the unknown signal. The frequency of the unknown signal is 1500 Hz. How? Given, The frequency of the signal source = 50 Hz. The number of spots counted in 1 minute = 30The time for 1 spot (Ts) = 1 minute / 30 spots = 2 sec. Spot wheel frequency (fs) = 1/Ts = 0.5 Hz (since Ts = 2 sec)We know that f = ns / Np Where,f = frequency of the unknown signal Np = number of spots on the spot wheel ns = number of spots counted in the given time period Thus, frequency of the unknown signal, f = ns / Np * fs = 30/50*0.5=1500 Hz. Therefore, the frequency of the unknown signal is 1500 Hz.
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Question 2 of 10A motor can convert:A. electrical energy to mechanical energy.B. nuclear energy to mechanical.O C. solar energy to chemical energy.D. mechanical energy to chemical energy.SUBMIT
Answers
A motor is an electromechanic device, which is able to both receive as input electrical energy, and output mechanical energy, but also receive mechanical energy, and output electrical energy, as it happens on hydroelectrical usines. This leaves us with answer A) Electrical energy to mechanical energy.
(8320) generally, when an induction fire occurs during starting of a reciprocating engine, the first course of action should be to
Answers
D) Shutting off the fuel supply to the engine should always be the first step taken when an induction fire develops during the starting of a reciprocating engine. This crucial step is necessary to stop more fuel from getting into the induction system and escalating the fire.
You can reduce the dangers connected with an induction fire, such as fuel leakage, high heat, and potential engine component damage, by quickly shutting off the fuel supply. By reducing the fuel source, this technique aids in containing the fire.
It is essential to activate the fire suppression system and follow approved emergency protocols after cutting off the fuel supply in order to handle the situation safely. To make sure the fire is properly controlled and put out, it is also advised to alert the right parties and seek expert assistance.
here is the complete question: Generally, when an induction fire occurs during starting of a reciprocating engine, the first course of action should be to
A. continue cranking and start the engine if possible.
B. close the throttle.
C. discharge carbon dioxide from a fire extinguisher into the air intake of the engine.
D. shutting off the fuel supply.
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In your own words who discovered gadolinium
Answers
Answer:
Who Discovered Gadolinium Gadolinium was only discovered in 1880 by a Swiss chemist called Jean Charles Galissard de Marignac.
Explanation:
When analyzing samples of two minerals which contain small amounts of gadolinium, didymium and gadolinite, he discovered spectroscopic lines that were unrecognisable. Every single element has distinctive spectroscopic lines so he knew he had discovered a new element, and called it gadolinium after Finnish chemist Johan Gadolin.
Answer:
Paul-Émile Lecoq de Boisbaudran
Jean Charles Galissard de Marignac
what is simple machine
Answers
what is the formula for converting frequency to approximate wavelength in meters?
Answers
The formula for converting frequency (f) to approximate wavelength (λ) in meters is given by:
λ ≈ c / f
where:
λ is the wavelength in meters,
c is the speed of light in meters per second (approximately 3 x 10^8 m/s), and
f is the frequency in hertz (Hz).
This formula relates the wavelength of a wave to its frequency and the speed at which the wave propagates. The speed of light in a vacuum is a constant value, so as the frequency increases, the wavelength decreases, and vice versa.
It's important to note that this formula provides an approximation and assumes that the wave is traveling through a vacuum or a medium with a constant refractive index. In different mediums, the speed of light may vary, which would affect the precise relationship between frequency and wavelength.
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which of the following arrangements will create an image larger than the object? responses a diverging lens with the object placed between the focal point and the lens a diverging lens with the object placed between the focal point and the lens a converging lens with the object placed at the focal point of the lens a converging lens with the object placed at the focal point of the lens a diverging lens with the object placed beyond the focal point of the lens a diverging lens with the object placed beyond the focal point of the lens a converging lens with the object placed between the focal point and the lens a converging lens with the object placed between the focal point and the lens
Answers
The converging lens with the object placed beyond the focal point of the lens will create an image larger than the object. This is because the converging lens bends the light rays towards each other, causing them to converge at a point beyond the focal point, which results in a magnified image.
To explain further, when light rays pass through a converging lens, they converge at a point called the focal point. If the object is placed at the focal point, the light rays will converge to a single point, but no image will be formed. However, if the object is placed beyond the focal point, the light rays will converge and form a real image that is larger than the object.
On the other hand, a diverging lens spreads out the light rays, causing them to diverge away from each other. Therefore, neither of the arrangements that involve a diverging lens will create an image larger than the object.
In summary, a converging lens with the object placed beyond the focal point is the arrangement that will create an image larger than the object.
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Warm air is _____ dense than cold air, and warm air holds _____ moisture than cold air.
Answers
Answer:
Warm air is less dense than cold air, and warm air holds more moisture than cold air.
Explanation:
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A system in which only one particle can move has the potential energy shown in (figure 1). Suppose u1 = 60 j. What is the y-component of the force on the particle at y = 0. 5 m ?.
Answers
The y-component of the force on the particle at the given position is 120 N.
Electric force on the particle
The electric force on the particle is determined by applying Coulomb's law and work-energy theorem as shown below;
Fd = W
Where;
F is the applied forced is the distanceW is potentialF = W/d
F = 60/0.5
F = 120 N
Thus, the y-component of the force on the particle at the given position is 120 N.
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