An electron is traveling in the positive x direction. A uniform electric field is present and oriented in the negative z direction. If a uniform magnetic field with the appropriate magnitude and direction is simultaneously generated in the region of interest, the net force on the electron can be made to have a magnitude of zero. What must the direction of the magnetic field be?

The wavelength, A, of a photon that has an energy of E= 4.73 × 10⁻¹⁹ J is 4.17 × 10⁻⁷ m.

Photon energy can be calculated using the equation E = hc/λ, where λ is the wavelength of the photon.

We know that the photon energy, E, is given as E = 4.73 × 10⁻¹⁹ J.

Additionally, we know that Planck's constant, h, is equal to 6.626 × 10⁻³⁴ J·s and the speed of light, c, is equal to 2.99 × 10⁸ m/s.

Substituting the known values into the equation for photon energy, we get: E = hc/λ4.73 × 10⁻¹⁹ J = (6.626 × 10⁻³⁴ J·s)(2.99 × 10⁸ m/s)/λ

Simplifying the expression above, we get:λ = hc/Eλ = (6.626 × 10⁻³⁴ J·s)(2.99 × 10⁸ m/s)/(4.73 × 10⁻¹⁹ J)λ = 4.17 × 10⁻⁷ m

Therefore, the wavelength, A, of a photon that has an energy of E= 4.73 × 10⁻¹.

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Answer:

D

Explanation:

The particles will move side to side over large areas

Answer:

Explanation:

D its incorrect in edge

The average angular acceleration of the second hand is zero because the angular speed is constant. The angular speed is 360 degrees/hour.

The angular acceleration of a clock's minute hand on a clock is π1800rad/s

Angular acceleration means the time rate of change of angular velocity. The second hand of a clock involves an angular displacement of 2π per minute. Its angular speed is w = 2p/60s = 0.105/s. The direction of w is perpendicular to the face of the clock, directing to the face of the clock. The average angular acceleration of the second hand is zero.

Therefore, the correct answer is as given above

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The glacier has a positive mass balance if accumulation exceeds ablation. likewise, the glacier gets bigger. A glacier decreases if ablation outpaces accrual and mass balance is negative.

The boundary between the accumulation area and the ablation area is where the equilibrium line is located, however the elevation varies from year to year. From the accumulation zone, the ice travels downhill into the ablation zone, where greater temperatures accelerate melting. Thus, a glacier is divided into two zones: the accumulation zone, where snow is kept, and the ablation zone, where more ice melts than is accumulated. The equilibrium line, which is often measured in altitude, separates these two zones.

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kinetic energy would beeeeeeeeeeeee 248 J

The magnitude of the initial acceleration of the object is 4.2 m/s².

The tension in the string once the object starts moving is 13.65 N.

The magnitude of the initial acceleration of the object is calculated by applying Newton's second law of motion as follows;

F(net) = ma

m₂g - μm₁g cosθ = a(m₁ + m₂)

where;

(4.75 x 9.8) - (0.535 x 3.25 x 9.8 x cos40) = a(3.25 + 4.75)

33.5 = 8a

a = 33.5/8

a = 4.2 m/s²

The tension in the string once the object starts moving is calculated as;

T = m₁a

T = 3.25 x 4.2

T = 13.65 N

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Answer: Calorie

Explanation

Answer: the answer would be kilocalories

Explanation:

Answer:

Pure water increases in volume when heated due to the phenomenon of thermal expansion. When water is heated, the kinetic energy of its molecules increases, causing them to move faster and spread out. This increased molecular movement leads to an increase in the average distance between water molecules, resulting in an expansion of the water.

Explanation:

.......

Answer:

To convert nanometers (nm) to picometers (pm), you need to multiply the value by 1,000. Therefore, to convert 12 nanometers to picometers, you would perform the following calculation:

12 nm * 1,000 pm/nm = 12,000 pm

So, 12 nanometers is equal to 12,000 picometers.

The size of the angle θ of a point object moving from point A to point B along a circular path is 2πR / L.

To understand this, consider a simple example. Suppose that a point object that moves from point A to point B along a circular path with a radius of 1 meter. The distance between points A and B is also 1 meter. Therefore, the size of the angle θ is equal to 2π × 1 / 1 = 2π radians.

In general, the size of the angle θ = ratio of the circumference of the circle to the distance between points A and B. The circumference of the circle is equal to 2πR, where R = radius of the circle. Therefore, the size of the angle θ is equal to 2πR / L.

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Complete question:

A point object moves from point A to point B along a circular path with a radius R. What is the size of the angle θ?

Answer: Lifting 25 kilograms a distance of 2.4 meters in 2.0 seconds

Explanation:

Got it wrong and that’s the answer

Lifting 25 kilograms a distance of 2.4 meters in 2.0 seconds  exerts the same power output. Hence, option (A) is correct.

The quantity of energy moved or converted per unit of time is known as power in physics. The watt, or one joule per second, is the unit of power in the International System of Units.

Power is also referred to as activity in ancient writings. A scalar quantity is power.

Power required for lifting 30 kilograms of weights a vertical distance of 0.5 meters in 0.5 second = (30×9.8×0.5)/0.5 watt = 294 watt.

Power required for lifting 25 kilograms a distance of 2.4 meters in 2.0 seconds= (25×9.8×2.4)/2.0watt = 294 watt.

Power required for lifting  45 kilograms a distance of 2.4 meters in 3.0 seconds =  (45×9.8×2.4)/3.0watt = 352.8 watt.

Power required for lifting  45 kilograms a distance of 0.5 meters in 0.5seconds =  (45×9.8×0.5)/0.5watt = 441 watt.

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We are given the following information

Mass of water: m = 2.68 kg

Initial temperature: T1 = 18.2 °C

Final temperature: T2 = 53.2 °C

Power: P = 1000 W

Specific heat capacity of water: c = 4186 J/kg °C

We are asked to find the time required to change the temperature of the water.

Recall that the amount of heat required is given by

So, the amount of heat is 392646.8 joules.

Recall that power is given by

Let us solve for time (t)

Therefore, the required time is 392.6468 seconds.

(Please round off as per instructions)

Since the car is accelerating at a constant rate, the distance it travels during each second of its motion will be directly proportional to the time it has been accelerating.

In the first second, the car moved a distance of 2 meters, and in the second second, it will move twice the distance of the first second, so the car will move additional distance of 2*2 = 4 meters during the second second of its motion.

The distance traveled during the second second of its motion is 1/2 * 2 = 1 meters.

A car that accelerates at a constant rate will move a distance equal to the initial velocity multiplied by time plus 1/2 the acceleration multiplied by the square of time. Since the car starts from rest, the initial velocity is zero.

Therefore, the distance traveled during the second second is 1/2 * acceleration \(* (time)^2 = 1/2 * a * t^2 = 1/2 * a * 1^2 = 1/2 * a\) Since the car moved 2.0 meters in the first second, it means the acceleration is\(2m/s^2\), and the distance traveled during the second second is 1/2 * 2 = 1 meters.

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Answer:

Neuroscientists believed that neuroplasticity only manifested itself in childhood, but late 20th-century research suggests that many aspects of the brain can change (or become "plasticized") even in adulthood.

Explanation:

Answer:

Dunno

Explanation:

Dunno

The initial momentum of the 25 kg object is 25 kg * 12 m/s = 300 kgm/s. After the collision, the momentum of the 25 kg object is 25 kg * 8 m/s = 200 kgm/s. According to the conservation of momentum, the momentum lost by the 25 kg object is equal to the momentum gained by the box. Therefore, the resulting momentum of the box is 300 kgm/s - 200 kgm/s = 100 kg*m/s.

Answer:

D) 8

Explanation:

Due to the octet rule the most stable atoms will have 8 valence electrons.

Answer:

Hold down the shift key if your on windows, mac or chromebooks.

Explanation:

Computer Technician

Answer:

Press the "caps lock" button and then press which letter u want to be in cap

Answer:

-transform plate boundary

- false

The length of the can above the water level is  0.052195 m  .

In the question ,

it is given that ,

capacity of the soda can = 355 ml = 0.000355 m³

diameter of the soda can = 6.2 cm = 0.062 m

mass of the soda can = 20g = 0.02 Kg

given that the soda can is half filled , so , the water volume in the can is

= 0.000355/2 m³

= 0.0001775 m³

Let the density of the water be  = 1000 kg/m³

So , the mass of the half filled water will be = 1000×0.0001775

Let water density be 1000kg/m³ , the mass of this half-filled water is

= 0.1775

So , The total mass of the water-can system is = 0.1775 + 0.02 = 0.1975 kg

Now , For the system to stay balanced, the total mass should be equal to the mass of water displaced by can submerged

So , The volume of water displaced by submerged can is

= 0.1975/1000 = 0.0001975 m³

So , Volume of the can that is not submerged( above water level) is

= 0.000355 - 0.0001975

= 0.0001575 m³

We know that base area of  can = πr² = π(d/2)² = π×(0.062/2)²

= 0.00301754 m²

So , the length of the can above water is = 0.0001575/0.00301754

= 0.0521948342 m

≈ 0.052195 m

Therefore , the can will be 0.052195 m above the water level .

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The best way of presenting the information on density graphically would be to use a D, bar graph.

A bar graph is a type of chart that uses rectangular bars to represent data. The bars are typically arranged in columns, with the independent variable (in this case, the type of wood) on the x-axis and the dependent variable (in this case, the density) on the y-axis.

A bar graph is the best choice for this data because it allows for easy comparison of density of different types of wood. We can see at a glance which type of wood is the densest and which type of wood is the least dense.

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a) Magnitude of force is 5.37N

b) Angle of force is - 37.88°

In physics, we define a force is an influence that can change the motion of object. A force can cause an object with mass to change to accelerate.

Given force from above is 5.9N

∑Fₓ = F₁ₓ + F₂ₓ+F₃ₓ = 0

F₂ cos 44° + Fₓ = 0

Fₓ = - 5.9 cos44°

= - 4.24  N

Given force that acts downward as 7.4N

∑Fy= Fy1+ Fy2 +Fy3 =0

Fy+ 5.9 sin 44° - 7.4= 0

F =  3.30 N

F =√Fₓ² +Fy²

=  5.37 N

b)  angle of force= tan⁻¹ (3.30/-4.24)

= - 37.88°

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The first step in scientific method is to state the problem. That is option B.

The scientific methods are those methods that are used by scientists and researchers to discover answers to specific questions that are being asked and it involves the use of scientific steps and guidelines.

These steps include the following:

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Answer:

If 99.995 A  pass thru a shunt and 5 mA pass thru the meter, the meter will have full scale deflection for a current of 100 A.

By Ohm's Law  

99.995 Rs = .005 Rm

Rs = .005 / 99.995 * 120

Rs = .006 ohms

Using a shunt resistance of .006 Ω will produce the required result.

The value of the shunt resistor should be very low to divert most of the current, use a shunt resistor with a value of 0.0012 ohms.

The value of the shunt resistor (Rs) is:

Rs = (Rm × Im) ÷ (If - Im)

where:

Rs = Shunt resistor value

Rm = Resistance of the milliammeter

Im = Full-scale current of the milliammeter

If = Maximum current we want to measure

The shunt resistor value:

Rs = (120 × 5 ) ÷ (100  - 5)

Rs = (0.12 ) ÷ (100 - 0.005)

Rs = 0.12 ÷ 99.995

Rs = 0.00120018 ohms

Since the value of the shunt resistor should be very low to divert most of the current, use a shunt resistor with a value of  0.0012 ohms.

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A cosmologist would describe the overall content of the universe as isotropic. They study the Universe.

A cosmologist is a professional aimed at understanding the nature and/or origin of the Universe.

Cosmologists can employ different devices to understand how the universe was formed (e.g., satellites).

The Universe can be considered isotropic because there is no specific center region in the Universe.

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Answer:

s= 8.28×10⁻¹⁶m

Explanation:

given

V= 2.25×10³V

from conservation of energy

mv²/2=qΔV

v=√(2qΔV/m)

v= √(2×1.6×10⁻¹⁹×2.25×10³/9.1×10⁻³¹)

=√7.9×10¹⁴m/s

=2.8×10⁷m/s

the deflection of electron beam is

S= gt²/2

recall t= d/v

s=g(\(\frac{d}{v}\))²/2

s= \(\frac{1}{2}\)×9.8×(0.364/2.8×10⁷)²

s= 8.28×10⁻¹⁶m

Explanation:

potential energy= mgh

30 × 10 × 30 = 9000J or 9KJ

Answer:

the correct statement is B Flight time is the same.

Explanation:

This is a projectile launch problem, in this case as it is rolling on a horizontal table all the initial horizontal velocity, for the time it takes to reach the floor we use

         y =\(y_{o}\) I + \(v_{oy}\) t - ½ g (t-t₀)

get to the floor y = 0

      0 =y_{o} - ½ g (t-t₀)²

       t = t₀ + √ (2  y_{o}/ g)

we see that the time to delegate to the floor does not depend on the initial velocity m for which the time to reach the floor is the same, regardless of the velocity of the body

the correct statement is B Flight time is the same.

Answer:

  72.5 A

Explanation:

There are about 13.6 coulombs of free electron charges in each cubic mm of copper. So, the rate of movement of charge is that quantity multiplied by the volume in the flow.

  V = πr²h  . . . . .  volume of a cylinder

  V = π(1.947 mm/2)²(1.79 mm/s) = 5.329 mm³/s

Then the charge flow rate is ...

  (13.6 C/mm³)(5.329 mm³/s) = 72.5 C/s

The magnitude of the current is about 72.5 amperes.

______

Additional comment

The volume of free charge in copper can be computed from the density, molar mass, number of atoms in a mole, number of charges in a coulomb, and the number of free charges per atom. Some of the combinations of necessary calculations can be found with a web search, so it is not unreasonable to presume that the charge density is known.

Answer:

i need help with the same question

Explanation: