Two metal plates 4 cm long are held horizontally 3 cm apart in a vacuum, one being vertically above other. The upper plate is at a potential of 3000 & the lower is earthed. Electrons having a velocity of 1×10^7 m/s are injected horizontally midway between the plates & in the direction parallel to 4 cm edge. Calculate the vertical deflection of the electron beams as it emerges from the plates. (Assume “e/m=1.8×10^11 c/kg”).

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(a) A = 5 kgwt

B = 10 N

First convert 5 kgwt to N,

\(5 \times 9.8 \\ = 49 \: N\)

Net force [the forces are acting in 2 opposite directions]

\(A - B \: \\ = 49 - 10 \\ = 39 \: N\)

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(b) Since, the force is greater by A ↦the block will move towards B, i.e, to the right.

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(c) Frictional force will try to oppose the motion of the block but since A has greater force than B, the frictional force will be resisted.

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ʰᵒᵖᵉ ⁱᵗ ʰᵉˡᵖˢ ツ

꧁❣ ʀᴀɪɴʙᴏᴡˢᵃˡᵗ2²2² ࿐

Sound travels faster in water that it does in air, but sound travels slower relative to light.

According to physics, sound is a vibration that moves as an acoustic wave across a transmission medium like a gas, liquid, or solid. In terms of human physiology and psychology, sound is the brain's receipt of these waves and its perception of them. Only the audio frequency range, or acoustic waves with frequencies generally between 20 Hz and 20 kHz, can provide a person an aural sense. These sound waves have wavelengths in air at atmospheric pressure that range from 17 meters (56 feet) to 1.7 millimeters (0.67 in). Inaudible to humans, ultrasounds are sound waves having a frequency higher than 20 kHz. Sound frequencies below 20 Hz are referred to as infrasound. Different species of animals have varying hearing ranges.

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To calculate the time required for a radioactive isotope with a half-life of 16.9 min to decay from a 3.27 mCi sample to -351 mCi, we need to use the equation for exponential decay. By rearranging the formula and solving for time, we can find the desired duration.

The decay of a radioactive isotope follows an exponential decay model. The equation for the decay is given by N = N₀ * (1/2)^(t/t₁/₂), where N is the final amount, N₀ is the initial amount, t is the time elapsed, and t₁/₂ is the half-life.

In this case, we want to find the time it takes for the sample to decay from 3.27 mCi to -351 mCi. Let's denote the initial amount as N₀ = 3.27 mCi and the final amount as N = -351 mCi.

To find the time, we can rearrange the equation as t = t₁/₂ * log₂(N/N₀). Substituting the values, we have t = 16.9 min * log₂((-351 mCi)/(3.27 mCi)).

By evaluating this expression, we can determine the number of minutes it will take for the 3.27 mCi sample to decay to -351 mCi.

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No, not necessarily, as velocity is the speed in a given direction and if the car is moving in a straight line, then the velocity is constant.

But if it is moving on a circular track, then the direction is constantly changing, leading to a change in velocity even if the speedometer reads a constant 35 mph.

The term velocity is used to describe both the speed and the direction of an object's motion. In other words, velocity is a vector quantity, which has both magnitude and direction. If an object moves at a constant speed in a straight line, then its velocity is constant because the direction of its motion is not changing. In this case, the speedometer reading of a constant 35 mph would indicate a constant velocity.

However, if the object moves on a circular track, then its direction of motion is constantly changing, even if the speedometer reading remains at a constant 35 mph. As a result, the object's velocity would not be constant, since the direction is constantly changing.

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The object would be moving at a constant velocity of 2 m/s.

A vector number called velocity is used to explain how quickly an object's position changes in relation to time. It is stated in terms of metres per second (m/s) or kilometers per hour (km/h), and is defined as the displacement (change in position) of an object divided by the time interval during which the displacement occurred.

The momentum (p) of an object is defined as the product of its mass (m) and velocity (v):

p = mv

We can rearrange this equation to solve for velocity:

v = p / m

Substituting the given values, we get:

v = 10 kg.m/s / 5 kg

Simplifying the expression, we get:

v = 2 m/s

Therefore, the object is moving at a constant velocity of 2 m/s.

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I was researching something for some teaching resources when I came across the phrase "six-sided number cube" on the AP Statistics website, which is a sort of Martian-like description of what we call a die in English.

With six numbers, there are 63 potential combinations. In general, the formula shown below can be used to determine how many combinations are possible given a set of n elements: 2n – 1 is the number of combinations with n elements. The equation then reads as follows for 6 elements. 6 elements could be combined in 720 different ways using the formula 6*5*4*3*2. If you have the option, you can alter the order of the components in a way that uses less of each.

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Therefore, the potential differences between (f, c), (f, e) and (a, e) are 4.14 V, 1.45 V, and 4.5 V, respectively.

Potential difference (also called voltage) is a measure of the electric potential energy per unit charge between two points in an electric circuit. It is usually measured in volts (V) and is denoted by the symbol "ΔV". In simpler terms, it is the difference in electric potential between two points in a circuit, and it is what causes electric charges to move from one point to another. The potential difference between two points can be measured using a voltmeter.

Here,

To solve this problem, we need to apply Kirchhoff's laws, which are the conservation of charge and the conservation of energy. Using the conservation of charge, we know that the sum of the currents entering and leaving a junction must be equal. At junction c, we have:

I1 = I2 + I3 (equation 1)

Using the conservation of energy, we know that the sum of the potential differences around any closed loop in the circuit must be zero. We can choose the loops (a, b, e, f, c, d, a) and (a, e, f, c, a) to obtain the following equations:

Loop 1: 10V - I1R1 - I2R2 - Vef - I3*R4 = 0 (equation 2)

Loop 2: 10V - Vef - I2*R5 = 0 (equation 3)

Now we have three equations (1), (2), and (3) with three unknowns (I1, I2, and I3). Solving for the currents, we get:

I1 = (10 - Vef - I2R2 - I3R4) / R1

Substituting equation 1 into equation 2 and rearranging, we get:

Vef = 10 - I1R1 - I2R2 - I3*R4

Substituting the first equation into the second equation, we get:

Vef = 10 - ((10 - Vef - I3R4) / R1)R1 - I2R2 - I3R4 - I2*R5

Simplifying and solving for Vef, we get:

Vef = (10R1 - R1I2R2 - R1I3R4 - R1I2R5 - R1I3*R4) / (R1 + R4)

Plugging in the values for the resistances and solving for I1, I2, and I3, we get:

I1 = 0.9 A

I2 = 2.07 A

I3 = 0.83 A

To calculate the potential differences between (f, c), (f, e) and (a, e), we can use Ohm's law:

Vfc = I2R2 = 4.14 V

Vfe = Vef - 5V = 1.45 V

Vae = I1R1 = 4.5 V

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When a train rolls to a smooth stop on a straight, level track, several forces come into play. The primary force responsible for the train's deceleration is the friction force between the train's wheels and the track.

Additionally, there are other forces acting on the train, such as air resistance and internal resistance within the train's components.

When the train is in motion, it possesses kinetic energy due to its velocity. As the train's operator applies the brakes, the friction force between the train's wheels and the track comes into play.

This friction force opposes the motion of the train, resulting in deceleration. The amount of friction depends on factors like the coefficient of friction between the wheels and the track, the weight of the train, and the braking force applied.

In addition to the friction force, air resistance acts on the train as it moves through the air. Air resistance increases with the train's velocity and opposes its motion, making it harder for the train to maintain its speed. As the train slows down, the force of air resistance decreases.

Furthermore, there may be internal resistance within the train's components, such as mechanical friction in the engine, transmission, and braking system. These internal forces also contribute to the overall deceleration of the train.

In conclusion, when a train comes to a smooth stop on a straight, level track, the primary force responsible for its deceleration is the friction force between the wheels and the track. Air resistance and internal resistance within the train's components also play a role in slowing it down.

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When questions are asked about who, what, when, and where, information is actually acquired.

We can differentiate between data, information, and knowledge.  

Until they are organized or polished, data represent isolated symbols and characters that lack context or meaning.

Data that have been cleaned up or organized in a useful way, providing the data with some context, are called information.

When comprehension is skillfully applied to newly obtained information, knowledge is the result.

So, when inquiries regarding who, what, when, and where are asked, information is gathered; but, when this information is applied to circumstances, it might turn into knowledge.

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Complete question:

By asking (who, what, when, where), do we get information or knowledge? Explain.

Answer:

A.100J

Explanation:

Given parameters:

Force on car = 20N

Distance  = 5m

Unknown:

Work done  = ?

Solution:

Work done is the product of force and distance;

  Work done  = force x distance;

Insert given parameters and solve;

        Work done  = 20 x 5  = 100J

The observed acceleration of the crate as it slides along the incline is -1.32 m/s².

The acceleration of the crate is determined from the net force acting on the crate as shown below.

F - Ff = ma

mgsinθ - μmgcosθ = ma

where;

(80)(9.8)(sin 12) - (0.35)(80)(9.8)cos(12) = 80a

-105.4 = 80a

a = -1.32 m/s²

Thus, the observed acceleration of the crate as it slides along the incline is -1.32 m/s².

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Answer:

149,916J

Explanation:

Pneumonic device: Kevin is half-mad and very square

this translates to: KE=(1/2)mv^2 !!

KE=(1/2)(78)(62^2)

KE=(39)(3844)

KE=149,916 Joules

Answer:

it's 149916

Explanation:

Formula = 1/2 x m x v^2

so if you put into your calculator 1/2 x 78 x 62^2

you get 149916

The time taken for the rocket to apply the force is 25 seconds.

The time taken for the rocket to fire or apply the force to change the speed  of the probe is calculated as follows;

F = ma

where;

F = mv / t

where;

The time taken for the rocket to apply the force is calculated as;

t = mv / F

t = (722 x 1) / (29)

t = 24.9 s

t ≈ 25 seconds

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Answer: Im sure its 1/A

Explanation:.

The statement is True. according to scientists, The Great Salt Lake could go dry in the next five years.

The term "Great Salt" is not a recognized term in physics, and it is unclear what is meant by it. However, if you are referring to the Great Salt Lake, then it is a large saltwater lake located in Utah, USA. As a physical entity, the Great Salt Lake has several interesting properties due to its high salinity.

For example, it is denser than freshwater and can therefore support heavier objects. Its high salt content also lowers the freezing point of water, which means that the lake's surface remains liquid even in extremely cold temperatures. These properties have practical applications, such as for the extraction of minerals from the lakebed and the testing of buoyancy and flotation devices.

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It would take approximately 14.3 billion years for a galaxy located 1 Mpc (megaparsec) away to reach its current position while moving at a speed of 70 km/s.The speed of light is used as a standard for measuring distances in astronomy. 1 Mpc is equal to 3.26 million light-years. Therefore, a galaxy located 1 Mpc away is 3.26 million light-years away.

To calculate the time it would take for the galaxy to reach its current position, we can use the formula:
The distance is 1 Mpc or 3.26 million light-years. We need to convert the speed from km/s to light-years per year. One light-year is approximately 9.46 trillion km.
70 km/s = 70 km/s x (3.1536 x 10^7 s/year) / (9.46 x 10^12 km/year)
70 km/s = 0.0000234 light-years per year

Now we can plug in the values:
Time = 3.26 million light-years / 0.0000234 light-years per year
Time = 1393162.39 years or approximately 14.3 billion years
Therefore, it would take about 14.3 billion years for the galaxy to reach its current position while moving at a speed of 70 km/s.

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Answer:

60 Ns

Explanation:

change in momentum = Fxt

6*10

60 Ns

A force of 6.0 N acts on a 4.0 Kg object for 10.0 s. The object's change in momentum is 60 kg-m/sec.

A force is an effect that can alter an object's motion according to physics. An object with mass can change its velocity, or accelerate, as a result of a force. An obvious way to describe force is as a push or a pull. A force is a vector quantity since it has both magnitude and direction.

change in momentum = force . time

change in momentum = 6 . 10 = 60

A force of 6.0 N acts on a 4.0 Kg object for 10.0 s. The object's change in momentum is 60 kg-m/sec.

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Answer:

120km

Explanation:

An ectopic heartbeat is an irregular heartbeat that happens when the heart's sinoatrial node (SA node), which is its normal heartbeat pacemaker, is disrupted. Ectopic beats originate from a location outside of the SA node, disrupting the normal heart rhythm. When it comes to the various types of ectopic beats, the most common is premature ventricular contraction (PVC).

If the ectopic impulse arises from the middle of the right atrium, the P wave will be abnormal. This occurs when the heart's ventricles experience an unexpected electrical impulse, causing them to contract prematurely. The P wave is a wave that appears on an electrocardiogram (ECG) and represents the electrical activity of the atria. The sinoatrial node generates a normal P wave, which spreads through both atria and then travels to the atrioventricular node, which slows the impulse and transmits it to the ventricles. P’ waveIf the ectopic impulse arises from the middle of the right atrium, the P' wave is abnormal.

As a result, the ECG can display the following:P waves with a single, smooth contour that are narrower than normal, P waves that have a pointed apex and are taller than normal, and P waves that merge with other waves, making them indistinguishable on the ECG.P prime waves, which are visible on an ECG, are related to supraventricular beats. They're usually seen in the early part of a supraventricular tachycardia event, which is a fast heart rate originating from the atria.

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The block has the greatest average power provided is bock m.

Mathematically instantaneous power is calculated as;

P = Fv

where;

Both blocks (m and 2m) will experience the same force but different velocity.

The smaller block (m) will experience greater velocity.

Thus, the block has the greatest average power provided is bock m.

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73.5 kilojoules are the answer. Since we can compute potential energy, we can convert 250 into 9.8 into 30 into 73500 joules, or u equal to m g h. Consequently, the body's potential energy will be 73500 joules, which is the necessary amount.

This potential energy calculator allows us to calculate the amount of energy that an elevated object has stored inside it. The full name of this effect is gravitational potential energy, and it refers to the energy that an item stores as a result of its height or vertical position.

The great wrecking ball of the crane. The ball's gravitational potential energy depends on both its mass and how high it is elevated. The relationship between gravitational potential energy and an object's mass and height is seen in the following equation:

PE Gravity equals (m, h, and g). The formula is rather simple to comprehend. The height of a non-raised object will be zero, and as a result, it will have no potential energy.

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Answer:

Cabinets are made to open one at a time so that there's not much of space taken up when all the drawers are open. Hope this helps.

From the law of conservation of momentum, the first egg did not break because it forward momentum is transferred to the cloth while the second egg broke, the block exerts an opposite force equal to the momentum of the egg on the egg.

Momentum is the product of the mass of an object and its velocity of motion.

The law of conservation of momentum states that the momentum of an isolated system of colliding bodies is conserved.

When an egg is thrown on a large sheet of cloth suspended, the egg does not break because the momentum of the egg is transferred to the cloth as it is depressed.

However, a second egg, thrown with similar force at a suspended concrete block, did break on impact because the block does not move forward, instead it exerts an equal but opposite force on the egg resulting in the egg breaking.

Therefore, from the law of conservation of momentum, the first egg did not break because it forward momentum is transferred to the cloth while the second egg broke, the block exerts an opposite force equal to the momentum of the egg on the egg.

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The force exerted on the hockey by the stick is -56.7 N.

Force is the product of mass and acceleration.

To calculate the force on the hockey, we use the formula below.

Formula:

Where:

From the question,

Given:

Substitute these values into equation 1

Hence, the force on the hockey is -56.7 N.

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Answer:

Boiling a kettle is an example of both thermal and kinetic energy. Thermal energy comes from a substance whose molecules and atoms are vibrating faster due to a rise in temperature. Heat energy is another name for thermal energy. Kinetic energy is the energy of a moving object.

it's kinetic!

Answer:

Mining is the extraction of valuable minerals or other geological materials from the earth from an orebody, lode, vein, seam, or reef, which forms the mineralized package of economic interest to the miner. Ores recovered by mining include metals, coal, oil shale, gemstones, limestone, dimension stone, rock salt, potash, gravel, and clay.

Explanation:

Answer:

Three resources that are mined from earth's crust are:
-Coal
-Gold
-Iron ore

Some more are:
-Aluminum
-Copper
-Lime
-Phosphate rock
-Gypsum
-Sand
-Gravel
-Rock
etc.

Explanation:

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The sound intensity at the position of the microphone is 1.58 × 10⁻⁵ W/m². The sound energy impinges on the microphone each second is 1.264 nW. Sound power, P = 31.0 W, Area of microphone, A = 0.800 cm² = 0.8 × 10⁻⁴ m² and Distance between the speaker and the microphone, r = 52.0 m

Part A

The sound intensity at the position of the microphone is given by the formula;I = P / (4πr²) Where, I = sound intensity, P = sound power, and r = distance between the speaker and the microphone.

Substituting the given values of P and r, we get;I = 31.0 / [4π(52.0)²] ≈ 1.58 × 10⁻⁵ W/m².

Therefore, the sound intensity at the position of the microphone is 1.58 × 10⁻⁵ W/m².

Part B

The sound energy impinges on the microphone each second is given by the formula; E = AI Where, E = energy, I = sound intensity and A = area of the microphone.

Substituting the values of I and A, we get;E = (0.8 × 10⁻⁴) × (1.58 × 10⁻⁵) = 1.264 × 10⁻⁹ W = 1.264 nW.

Therefore, the sound energy impinges on the microphone each second is 1.264 nW.

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Answer:

B. climate change

Explanation:

asteroids are too big and volaconos are probably gonna create a lot of smoke that can kill ya in seconds so I guess climate change

Answer:

Mass and kinetic energy have a positive relationship, which means that as mass increases, kinetic energy increases, if all other factors are held constant.

In this state, Kinetic energy is equal to half of the product mass and velocity. SI unit is joules. So it's if the mass is doubled then the kinetic energy also gets doubled.