An x-ray photon at 2.5 x 10¹⁸ Hz strikes a metal foil, releasing an electron. The resulting photon has a frequency of 2.3 x 10¹⁸ Hz, and the electron's speed is determined to be 1.24 x 10⁸ m/s when its energy matches that of the photon.
The energy of a photon is given by the equation:
E = hν
where h is Planck's constant and ν is the frequency of the photon.
The energy of the electron is given by the equation:
\(E = \frac{1}{2} m v^2\)
where m is the mass of the electron and v is the speed of the electron.
We can set these two equations equal to each other to find the speed of the electron:
\(h\nu = \frac{1}{2} m v^2\)
We can rearrange this equation to solve for v:
\(v = \sqrt{\frac{2h\nu}{m}}\)
We know the value of h, ν, and m. Plugging these values into the equation, we get:
\(v = \sqrt{\frac{2 \times (6.626 \times 10^{-34} \, \text{J} \cdot \text{s}) \times (2.5 \times 10^{18} \, \text{Hz})}{9.11 \times 10^{-31} \, \text{kg}}}\)
v = 1.24 x 10⁸ m/s
Therefore, the speed of the electron is 1.24 x 10⁸ m/s.
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1. Two long, parallel wires separated by 1.25 cm carry electric currents that flow in opposite directions. The current in one wire is 0.530 A, and the current in the other is 1.17 A. Find the magnitude of the force per unit length that one wire exerts on the other. (N/m)
2. A tightly wound solenoid that consists of 200 turns of wire has a length of 0.100 m long. Find the magnitude of the magnetic field inside the solenoid when it carries an electric current of 2.00 A.
The magnitude of the magnetic field inside the solenoid is?
The magnitude of the force per unit length that one wire exerts on the other is 0.945 N/m.
This is calculated using the equation F = μ0I1I2/2πd, where μ0 is the permeability of free space, I¹ and I² are the two currents, and d is the distance between the wires. In this case, μ0 = 4π x 10⁻⁷ N/A², I¹ = 0.530 A, I² = 1.17 A, and d = 1.25 cm.
The magnitude of the magnetic field inside the solenoid is 0.837 T (Tesla). This is calculated using the equation B = μ0NI/L, where μ0 is the permeability of free space, N is the number of turns, I is the current, and L is the length of the solenoid.
In this case, μ0 = 4π x 10⁻⁷ N/A², N = 200 turns, I = 2.00 A, and L = 0.100 m. This magnetic field is generated by the electric current flowing through the solenoid, and it is strongest at the center of the solenoid and gets weaker as one moves away from the center.
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15. What is the current in a 12V circuit if the resistance is 20?
The current in a 12V circuit if the resistance is 20ohms is 0.6A.
How to calculate current?Current (I) is the amount of electric charge flowing in each unit of time. It is measured in amperes (A).
The current passing through a circuit can be calculated using the following formula:
I = V/R
Where;
V = voltageR = resistanceI = currentAccording to this question, a 12V circuit has a resistance is 20 ohms. The current is calculated thus;
I = 12V ÷ 20ohms = 0.6A.
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Which example would contain only longitudinal waves? a. a crowd doing the wave at a sporting event
b. an ultrasound that transmits soundwaves c. the waves formed by the ocean
d. playing the guitar strings
Answer: The answer to this problem is 3 option
Explanation:
The waves fοrmed by the οcean wοuld cοntain οnly lοngitudinal waves. Thus, option c is correct.
What dοes the term "lοngitudinal wave" mean?A lοngitudinal wave is a fοrm οf wave in which the medium vibrates parallel tο the wave's directiοn and the displacement οf the medium mοves in the same directiοn as the wave's mοtiοn. Sοund waves are a cοuple οf examples οf lοngitudinal waves. seismic P waves, and ultrasοnic waves.
Why dο lοngitudinal waves gο by that name?The wave is referred tο be a lοngitudinal wave when the medium's particles vibrate perpendicular tο the wave's directiοn οf prοpagatiοn.
Cοmpressiοns and rarefactiοns are created by οscillating sοund waves in a manner similar tο that οf prοpagatiοn directiοn. Hence, lοngitudinal waves are the name given tο sοund waves.
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a 40 kg boy on a sheet of ice is initially at rest and is holding a 5 kg jug of water. He then throws the jug of water forward. If the jug has a final velocity of 3.0 m/s what is the final velocity of the boy
Answer:
mass of boy (M)=40kg
mass of jug(m)=5kg
both are at rest so (u)=0
v of jug=3m/s
v of boy=?
Now,
using PCLM
Mu+mu=Mv+mv
0=5*3+40v
v=-15/40 m/s
Which of the following is a true statement?
To maintain a higher temperature (in a thermotat), which way hould the control knob be moved?-to the right o that it move toward the contact, or to the left?
Explain why?
Turn the dial either clockwise to make the unit colder or anticlockwise to make the unit warmer to set the thermostat to any temperature.
A thermostat is a part of a regulating mechanism that senses the temperature of a physical system and takes action to keep it close to a desired setpoint.
Any system or gadget that heats or cools to a setpoint temperature uses a thermostat. Examples include central heating systems for buildings, air conditioners, HVAC systems, water heaters, kitchen appliances like refrigerators and ovens, and incubators for use in science and medicine.
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density of certain liquid is2.4 g/cc. calculate the mass of 100cc of such liquid
Answer:
Explanation:
Density = mass / volume
density = 2.4
volume = 100 cm^3
2.4 = m / 100 Multiply both sides by 100
2.4 * 100 = m
m = 240 grams
A large bulk quantity is defined as 3,000 kg (6,614 lbs.) for solids and 3,000 liters (792 gallons) for liquids and gases in a single package.
The given statement "A large bulk quantity is defined as 3,000 kg (6,614 lbs.) for solids and 3,000 liters (792 gallons) for liquids and gases in a single package" is true.
What is large bulk quantity?
Each person who carries one or more of the hazardous items must create and follow a transportation security plan for hazardous materials that complies with the requirements of safety and security plans section.3,000 kilograms (6,614 lbs) or 3,000 liters (792 gal) or more of solids or liquids in a single container, such as a cargo tanker, portable tank, tank car, or other bulk container, is referred to as a "large bulk quantity."The security plan must include an evaluation of transportation security risks for shipments of the dangerous goods listed in §172.800, including site-specific or location-specific risks connected with facilities where the dangerous goods listed in §172.800 are prepared for transportation, stored, or unloaded incidentally to movement, and suitable countermeasures to the evaluated risks.Learn more about the Hazardous bulk with the help of the given link:
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the reason that water has all of the unique properties that it does is due to the fact that
The reason water has all of the unique properties that it does is due to the fact that it is a polar molecule.
Water molecules consist of two hydrogen atoms bonded to one oxygen atom, and the arrangement of these atoms gives rise to the molecule's polarity.
Polarity arises from the difference in electronegativity between the oxygen and hydrogen atoms. Oxygen is more electronegative than hydrogen, causing the oxygen atom to pull the shared electrons towards itself, creating a partial negative charge (δ-) on the oxygen atom and partial positive charges (δ+) on the hydrogen atoms.
The polarity of water molecules allows them to form hydrogen bonds. Hydrogen bonding occurs when the positively charged hydrogen atom of one water molecule is attracted to the negatively charged oxygen atom of another water molecule. This gives water unique properties such as high boiling and melting points, high specific heat capacity, and high heat of vaporization.
The hydrogen bonding in water also leads to its cohesive and adhesive properties. Cohesion refers to the attraction between water molecules, causing them to stick together. Adhesion refers to the attraction between water molecules and other substances. These properties allow water to have a high surface tension, capillary action, and the ability to dissolve a wide range of substances, making it an excellent solvent.
Additionally, water's polarity enables it to exhibit a unique property called "hydration." Water can surround and interact with ions and polar molecules, effectively separating and stabilizing them in solution.
Overall, the polar nature of water, resulting from its molecular structure and hydrogen bonding, is the key factor behind its exceptional properties, making it essential for life and many natural phenomena.
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what minimum speed must you give the pail at the highest point of the circle if no water is to spill from it?
The minimum speed that must be given to the pail at the highest point of the circle if no water is to spill from it can be determined using the equation for centripetal acceleration.
Centripetal acceleration is given by the equation a = v²/r, where v is the speed, and r is the radius of the circle.
At the highest point of the circle, the centripetal acceleration must be equal to the acceleration due to gravity, g, in order for no water to spill from the pail.
Setting the two equations equal to each other and solving for v gives:
v²/r = g
v² = g*r
v = √(g*r)
Therefore, the minimum speed that must be given to the pail at the highest point of the circle if no water is to spill from it is √(g*r), where g is the acceleration due to gravity, and r is the radius of the circle.
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a plastic ball has a charge of 10 -12 c. a. does it have an excess or a deficiency of electrons compared with its normal state of electrical neutrality? b. how many such electrons are involved?
a. A plastic ball with a charge of 10^-12 C has an excess of electrons compared to its normal state of electrical neutrality. This is because a negative charge indicates an excess of electrons, which are negatively charged particles.
b. To find out how many electrons are involved, we need to use the formula:
Number of electrons = Charge / Charge per electron
The charge per electron is approximately -1.6 x 10^-19 C (negative since electrons are negatively charged).
Number of electrons = (10^-12 C) / (-1.6 x 10^-19 C/electron)
Number of electrons ≈ 6.25 x 10^6 electrons
So, there are approximately 6.25 million excess electrons involved in giving the plastic ball its charge of 10^-12 C.
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Which provides a greater mechanical advantage; a single fixed pulley or a two pulley system? Why?
write a summary description of what happens to the light when it goes from one medium to another. use the following vocabulary words in your summary: index of refraction, incident angle, reflected angle, and refracted angle.
Answer:
when light goes from one medium to another, refraction is taken place. refraction is the bending of light. and the center part of the bending is called the reflected angle. the index of refraction is the measure of the bending of a ray of light when passed from one medium into another. the refracted angle is the angle between a refracted ray and the normal drawn at the point of incidence to the interface at which refraction occur.
Explanation:
I think I got all of the definitions. you can use the definitions to help you understand what you write about.
how long would it take for a net upward force of 1000n, to increase the speed of a 50.0kg object from 100m/s to 200 m/s
It would take 5.00 seconds for a net upward force of 1000 N to increase the speed of a 50.0 kg object from 100 m/s to 200 m/s.
We can use the formula for acceleration to determine the time required to increase the speed of the object from 100 m/s to 200 m/s with a net upward force of 1000 N:
a = F_net / m
where a is the acceleration of the object, F_net is the net force acting on the object, and m is the mass of the object.
Substituting the given values, we get:
a = 1000 N / 50.0 kg = 20.0 m/\(s^2\)
The final velocity of the object is 200 m/s and the initial velocity is 100 m/s, so the change in velocity is:
Δv = 200 m/s - 100 m/s = 100 m/s
We can use the following kinematic equation to determine the time required for the object to reach a final velocity of 200 m/s:
Δv = a*t
where t is the time required to achieve the change in velocity.
Substituting the values, we get:
100 m/s = 20.0 m/\(s^2\) * t
Solving for t, we get:
t = 5.00 s
Therefore, it would take 5.00 seconds for a net upward force of 1000 N to increase the speed of a 50.0 kg object from 100 m/s to 200 m/s.
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if you had something the size of a sugar cube that was made of white dwarf matter, it would weigh about as much as
If you had a sugar cube that was made of white dwarf matter, it would weigh about as much as an elephant.
White dwarfs are the smallest type of stars in the universe, and they have a density of around 100 million times greater than that of water. This means that if you took a sugar cube that was made entirely out of white dwarf matter and put it on your kitchen counter, it would weigh about as much as an elephant!
But don't worry—you're not going to find any white dwarfs at your local grocery store or restaurant. White dwarfs are formed when red giants collapse in on themselves after burning through their fuel. And if you did happen to find one, you'd need a really big countertop.
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When two or more atoms combine into a chemical compound, the force of attraction holding the atoms together is known as a ______. A. charge B. electric current C. bond D. magnetic pole
Answer:
rgg3ge4gg434g4g4g4g44g
Explanation:
grg4g4g4y44h44h
what are the consequences of being exposed to nuclear waste
Answer:
it could cause skin burns and acute radiation syndrome (“radiation sickness"). It can also result in long-term health effects such as cancer and cardiovascular disease*
*Cardiovascular disease affects the heart or blood vessels. It's usually associated with a build-up of fatty deposits inside the arteries and an increased risk of blood clots.
The minimum capacitance of a variable capacitor in a radio is 4.15 pF. Part A What is the inductance of a coil connected to this capacitor if the oscillation frequency of the L-C circuit is 1.50 MHz, corresponding to one end of the AM radio broadcast band, when the capacitor is set to its minimum capacitance? Express your answer in henries. L = nothing H Request Answer Part B The frequency at the other end of the broadcast band is 0.543 MHz. What is the maximum capacitance of the capacitor if the oscillation frequency is adjustable over the range of the broadcast band?
The inductance of the coil connected to the capacitor is 2.16 × 10⁻⁷ H.
The maximum capacitance of the capacitor is 33.8 pF.
We know that the resonant frequency of an L-C circuit is given by:
f = 1 / (2π√(LC))
Rearranging the equation, we get:
L = 1 / (4π²f²C)
At minimum capacitance, C = 4.15 pF = 4.15 × 10⁻¹² F, and f = 1.50 MHz = 1.50 × 10⁶ Hz. Substituting these values in the equation above, we get:
L = 1 / (4π² × (1.50 × 10⁶)² × 4.15 × 10⁻¹²) = 2.16 × 10⁻⁷ H
At the other end of the broadcast band, f = 0.543 MHz = 0.543 × 10⁶ Hz. To find the maximum capacitance, we rearrange the resonant frequency equation as follows:
C = 1 / (4π²f²L)
Substituting f = 0.543 × 10⁶ Hz and L = 2.16 × 10⁻⁷ H, we get:
C = 1 / (4π² × (0.543 × 10⁶)² × 2.16 × 10⁻⁷) = 33.8 pF
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Not far from the mirror showcase (the figure shows a top view) there is a person (indicated by point H in the figure), and closer to the showcase there is a lamppost (point C). By building, find the positions at which the observer (points H, which are indicated for example and are not the answer) will see in the window: a person to the left of the pillar; the person to the right of the pillar; a pole blocking a person
The observer (point H) must be positioned to the right of the person and to the left of the lamppost, to the left of the person and to the right of the lamppost, or behind the lamppost to see the person obstructed by it.
To determine the possible positions of the observer (point H) relative to the mirror showcase, we need to consider the given information about the position of the person and the lamppost.
If the person is to the left of the lamppost (point C) as seen in the window, then the observer (point H) must be positioned to the right of the person and to the left of the lamppost. This is because the mirror will reflect the image of the person to the right, and the observer must be positioned to the right of the reflected image to see it.
If the person is to the right of the lamppost (point C) as seen in the window, then the observer (point H) must be positioned to the left of the person and to the right of the lamppost. This is because the mirror will reflect the image of the person to the left, and the observer must be positioned to the left of the reflected image to see it.
If the lamppost (point C) obstructs the view of the person as seen in the window, then the observer (point H) must be positioned behind the lamppost, either to the left or to the right of it. This is because the mirror will not be able to reflect the image of the person due to the obstruction caused by the lamppost.
In summary, the possible positions of the observer (point H) relative to the mirror showcase are:
To the right of the person and to the left of the lamppost, to see the person to the left of the lamppost. To the left of the person and to the right of the lamppost, to see the person to the right of the lamppost. To the left or right of the lamppost, behind it, to see the obstruction of the person caused by the lamppost.
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Complete question:
Using the given information, determine the possible positions of the observer (point H) relative to the mirror showcase such that the following are observed:
1 - The person is to the left of the lamppost (point C) as seen in the window.
2 - The person is to the right of the lamppost (point C) as seen in the window.
3 - The lamppost (point C) obstructs the view of the person as seen in the window.
to avoid possible wake turbulence from a large jet that has just landed prior to your takeoff quizlet
To avoid possible wake turbulence from a large jet that has just landed prior to your takeoff, there are a few important considerations. Firstly, it is crucial to maintain a safe distance from the preceding aircraft. The recommended separation distance varies depending on the size and type of aircraft, but typically, it is advised to stay at least 3 miles behind a large jet. This ensures that you are outside the wake turbulence zone.
Additionally, it is important to be aware of the prevailing wind conditions. Wake turbulence tends to linger in the downwind direction, so it is advisable to take off either on a crosswind runway or in a direction that deviates from the landing path of the preceding aircraft. This helps to minimize the risk of encountering any residual turbulence.
Furthermore, it is essential to pay attention to the instructions provided by air traffic control. They will guide you on the appropriate departure procedures and any specific instructions to avoid wake turbulence.
By following these guidelines, you can reduce the risk of encountering wake turbulence from a large jet that has just landed. It is important to prioritize safety and adhere to the recommended procedures to ensure a smooth and secure takeoff.
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fill in the blanks (grade8 physics)
Answer:
infra-red
molecules
vacuum
ionizing (?)
transmission
redirected
absorbed
emission
dark
emitter
reflectors
deflect
Dones
Which statement best explains the similarity in the arrangement of the bones in these two structures?
O The bones of all animals are similarly arranged
O The bones of animals that take in oxygen are similarly arranged.
O Humans and whales use these structures to perform the same functions.
Humans and whales inherited these structures from a common ancestor.
What is density? Write a formula by showing the relation of mass density and volume
Answer: below
Explanation: Density, mass of a unit volume of a material substance. The formula for density is d = M/V, where d is density, M is mass, and V is volume
Answer:
Density is defined as the amount of matter contained in unit volume of body
The input preure on a hydraulic lift i 1200 Pa. If the output force on the other ide i 800 N, what i the output urface area?
A hydraulic lift's input pressure is 1200 Pa. If the output force on the other side is 800 N, the output surface area is 0.67m^2
Given the input pressure (P1) = 1200Pa
Output force (F2) = 800N
We know that P= F/A where A is area of cross section
Let the input force be F1 and area is A1
Then by pascals law we say that:
F1/A1 = F2/A2
1200 = 800/A2 (since P1= F1/A1)
A2 = 8/12 = 0.67m^2
Hence the area of other side = 0.67m^2
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The free-fall acceleration at the surface of planet 1 is 15 m/s2. The radius and the mass of planet 2 are twice those of planet 1. Part A What is g on planet 2
Answer:
3.75m/s²
Explanation:
g= GM/r²
For planet 1
\(g_{1}\)= GM/r² (i)
\(g_{1}\) = 15m/s²
for planet 2
radius= 2*r= 2r
g= GM/r
\(g_{2}\)= GM/(2r)²
\(g_{2}\)= GM/4r²
\(g_{2}\)= GM/r² *1/4
from (i)
\(g_{2}\)= \(g_{1}\) *1/4
\(g_{2}\) = 15/4
\(g_{2}\) = 3.75m/s²
The intensity of the distributed lood acting on the beams 25 kN/m.) Determine the magnitude of reaction at Express your answer to three significant figures and include the appropriate units O ? N Value Units Submit Request Answer Figure Part 6 1 of 1 Delane te zand y components of reaction all sing scalar notation Express your answers using three significant figures separated by a comma HV AED vec ?
The magnitude of reaction at the beam due to the distributed load of 25 kN/m is 625 N.
What is the magnitude of reaction to the distributed load?The magnitude of reaction at the beam can be determined by calculating the total force exerted by the distributed load. In this case, the distributed load is given as 25 kN/m. To find the magnitude of reaction, we multiply the distributed load by the length of the beam.
Therefore, the magnitude of reaction is 25 kN/m multiplied by the length of the beam in meters. By performing the calculation, we obtain the value of 625 N as the magnitude of reaction at the beam due to the distributed load. This represents the total force exerted by the distributed load on the beam.
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It is your parent's 25th Wedding Anniversary and you thought it would be special to throw them a surprise party. Your entire family is up north at your Traverse City cottage (240 miles from your home) and you plan on waking up early Saturday morning to drive home and set up for the party. You wake up at 10:00 am to head out but to your surprise your parents decide on leaving at 11:00 am instead of 1:00 pm like they originally planned. Your father ALWAYS drives 60 miles per hour on the expressway and it will take you about 2 hours to set up for the party. How fast must you drive in order to get home in enough time to make the surprise a success? Show your work.
Answer:
120 miles per hour.
Explanation:
We need to find the time it takes my parents to drive home from the cottage. Since my father drives at 60 miles per hour, and the cottage is 240 miles from our home, and distance = speed × time. So, time = distance/speed = 240 mi/60 mi/h = 4 h.
So, it will take my father 4 hours to drive home from the cottage.
Since I have 2 hours to prepare for the party, the time left for me to drive to the cottage is 4 - 2 hrs = 2 hrs.
So, I'm supposed to drive to the cottage in at most 2 hours.
The speed at which I must drive in this time period is thus, speed = distance/time = 240 miles/2 hours = 120 miles per hour.
So, I must drive at a minimum speed of 120 miles per hour.
What is a simple definition of net force?
Net force is the overall force acting on an object, which takes into account the magnitude and direction of all the individual forces acting on it.
Whenever there are multiple forces acting on an object, the net force determines the resulting motion of the object. If the net force is zero, the object will remain at rest or continue to move with a constant velocity.
If the net force is non-zero, the object will experience acceleration in the direction of the net force, as described by Newton's second law of motion. The net force can be calculated by vector addition of all the individual forces acting on the object.
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A particle starts from rest and is acted on by a net force that does work at a rate that is proportional to the time t. The speed of the particle is proportional to:.
A particle starts from rest and is acted on by a net force that does work at a rate that is proportional to the time t. The speed of the particle is proportional to √t.
Work is a change in kinetic energy, it should be noted. Power will therefore be determined as follows:
Power = Work / Time = force × velocity
Work = the change in kinetic energy = 1/2 mv2
If work is proportional to time:
W = t
1/2 mv2 = t
v2 = t
v (speed) = √t
Speed is the rate and direction of an object's movement, as well as the rate and duration at which an object is moving along a path. In all other positions, speed is a scalar value while pace is a vector.
Power is inversely related to t. Because the force is constant, the velocity will be a function of t. As a result, the particle's speed is proportional to √t.
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What is the acceleration of a 5kg object that experiences 150N of force?
(Include units!) *
Answer:
The answer is 30N/Kg
Explanation:
\(a = \frac{force}{mass} = \frac{150nioton}{5kg} = 30 \frac{nioton}{kilogram}\)
Explanation:
Hey there!
Given;
Mass(m) = 5kg
Force (f) = 150N
Acceleration (a) = ?
We know;
F = m*a
150 = 5*a
5a = 150
a = 150/5
a = 30m/s^2.
Therefore, acceleration (a) = 30m/s^2.
Hope it helps...