An electron was accelerated from rest through a potential difference of 2500 v. what is its speed?

Answer:

I know I'm late but...

Explanation:

A mixture is the combination of two or more substances together. And I'm pretty sure that a mixture has no chemical substances. And mixtures can be physically separated.

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All large telescopes are reflectors because large lenses are expensive to make and because large lenses sag under their own weight.

Telescopes are instruments used to observe celestial objects in the night sky. They work by collecting and focusing light, allowing astronomers to see distant stars, galaxies, planets, and other objects. Telescopes come in different types, including refracting telescopes, reflecting telescopes, and compound telescopes.

Compound telescopes, on the other hand, use a combination of lenses and mirrors. Telescopes have revolutionized our understanding of the universe by allowing us to study distant objects in great detail. They have helped us discover new planets, stars, galaxies, and even black holes. With the help of telescopes, astronomers have been able to make groundbreaking discoveries in the fields of astrophysics, cosmology, and planetary science, and they continue to be an essential tool in the study of the cosmos.

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Complete Question: -

Why are all large astronomical telescopes reflectors?

Answer:

The elastic potential is 1/2 as much.

Explanation:

The reason I say this is because of you take a new rubber band, after stretching the first time, all the way until it doesn't snap, you stretch it again and there's not as much resistance as when it was new.

I hope this helps.

Explanation:

A lightning rod (US, AUS) If lightning hits the structure:-

It will preferentially strike the rod and be conducted to ground through a wire.

Instead of passing through the structure, where it could start a fire or cause electrocution.

The parts of a lightning protection system are air terminals (lightning rods or strike) and all of the connectors and supports to complete the system.

The given problem can be exemplified in the following diagram:

The weight of the bar is concentrated in its center of mass which is located in the middle of the longitude of the bar. We can add the total torques at the point where the pivot touches the bar and we get:

Here we have used momentum counter-clockwise as positive. Since the system is in equilibrium the sum of the torques must be equal to zero:

Now we solve the operations, we will use for the acceleration of gravity 9.8 meters per second squared:

Now we solve for the mass "M" first by subtracting 88.2Nm from both sides:

Now we divide both sides by -1.96:

Solving the operations we get:

Therefore, the mass of the bar is 45 kg.

Answer:

Delta !

Explanation:

Answer:

- maintain its state of motion

- Keep its velocity constant (either at zero or non-zero value)

The correct graph should have a positive slope for the initial acceleration phase, a horizontal line for the constant velocity phase, and a negative slope for the deceleration phase.

To determine which graph represents the motion correctly, let's analyze the given information step by step.

The car starts from rest and accelerates at 1 m/s² for 2 seconds.

During this period, the velocity of the car increases linearly, as the acceleration is constant. Therefore, the graph representing this phase should be a straight line with a positive slope.

The car then continues at a constant velocity for 10 seconds.

Since the car maintains a constant velocity during this period, the graph representing this phase should be a horizontal line, indicating no change in velocity.

The car sees a tree blocking the road and applies brakes, decelerating at 1 m/s² until it comes to rest.

During this phase, the car's velocity decreases linearly due to the deceleration. Therefore, the graph representing this phase should be a straight line with a negative slope.

Based on this analysis, the correct graph should have a positive slope for the initial acceleration phase, a horizontal line for the constant velocity phase, and a negative slope for the deceleration phase.

Among the given options, the graph that represents the motion correctly is likely to be a graph that meets these criteria. However, since the options were not provided, I'm unable to directly identify the correct graph.

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Answer: a molecule

Explanation:

Answer:

\(longest \: dstance \: btw \: earh - mars \\ (150 + 230) \times {10}^{6} km \\ t = \frac{d}{c} \\where \: c \: is \: the \: speed \: of \: light \\ = \frac{380 \times {10}^{6} km}{3 \times { {10}^{5} }km. {sec}^{ - 1} } \\ \\ when \: mars \: is \: close \: to \: earth \\ ( 230 - 150) \times {10}^{6} km \\ t = \frac{d}{c} \\where \: c \: is \: the \: speed \: of \: light \\ = \frac{80 \times {10}^{6} km}{3 \times { {10}^{5} }km. {sec}^{ - 1} } \)

We never see the Moon next to Polaris (the North Star) because the Moon's orbit around the Earth is not aligned with the Earth's rotation axis. Instead, the Moon's orbit is inclined at an angle of about 5 degrees to the Earth's orbit around the Sun.

This means that the Moon appears to move across the sky along a path that is inclined at a similar angle to the Earth's equator. Polaris, on the other hand, appears to remain in a fixed position relative to the Earth's rotation axis. As a result, the Moon and Polaris appear to move along different paths in the sky and are unlikely to be seen next to each other.

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Answer:

Ik its mass and velocity but not sure if its also shape

Its shape of an object that is not needed to find the kinetic energy of an object.

The kinetic energy of an object is the energy that it possesses due to its motion. It is defined as the work needed to accelerate a body of a given mass from rest to its stated velocity.

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The second at the doorknob exerts the greater torque.

The torque a force produces is determined by:

Fdsino = T

where

F is the force's magnitude.

The distance d between the force's application point and the rotational center

the angle between the force's direction and d

What we have in this issue is

- Two equal-amplitude pressures F

- Both forces are parallel to the door (sine = 1, so = 90°).

- The door's center receives the first force, while the doorknob receives the second. This indicates that for the second force, d is bigger.

Consequently, the second force imposes a stronger torque.

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Star Sorgan of magnitude 1 would appear the brightest out of the following hypothetical stars.  If you use the highest daily position of the Sun to mark the noon time of a day, then you are using Apparant Solar Times. The star magnitude system that goes from 1 to 6 was constructed by Hipparchus. Option 2 is correct.

The apparent brightness of a celestial object in the sky is called its magnitude. The scale is inverted; lower numbers denote greater brightness. The stars are classified using their magnitudes, which is denoted by 'm. 'A star's apparent magnitude is how bright it appears in the sky as seen from Earth. A star's absolute magnitude is how bright it would be if it were a distance of 10 parsecs (32.6 light-years) from Earth.

The highest daily position of the Sun is used to mark the noon time of a day in the Apparent Solar Times timing system. The star magnitude system that goes from 1 to 6 was created by Hipparchus.

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Answer:

hope this answer helps you.

The relationship between mass and kinetic energy is K.E ∝ m and K.E ∝ v².

The kinetic energy of an object exists as the energy that it maintains due to its motion. It is defined as the work required to accelerate a body of a disseminated mass from rest to its stated velocity. Having acquired this energy during its acceleration, the body preserves this kinetic energy unless its speed changes.

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The bullet takes 0.0025 seconds to pass through the wooden plank of 5 cm thickness when it is traveling horizontally with an initial speed of 30 m/s and a final speed of 10 m/s.

The time taken by the bullet to pass through the wooden plank can be determined using the equation of motion for constant acceleration.

Given:
Initial speed (u) = 30 m/s

Final speed (v) = 10 m/s

Distance (s) = 5 cm = 0.05 m

To find the time taken (t), we need to calculate the acceleration (a) first. We can use the equation:

v² = u² + 2as

Rearranging the equation, we have:

a = (v² - u²) / (2s)

Substituting the given values:

a = (10² - 30²) / (2 * 0.05)

Simplifying the expression:

a = (-800) / (0.1)

a = -8000 m/s²

The negative sign indicates that the acceleration is in the opposite direction of the initial velocity.

Next, we can use the equation of motion:

v = u + at

Substituting the values:

10 = 30 + (-8000) * t

Simplifying the equation:

-8000t = -20

Dividing by -8000:

t = 20 / 8000
t = 0.0025 s

Therefore, the time taken by the bullet to pass through the wooden plank of 5 cm thickness is 0.0025 seconds.


To find the time taken by the bullet to pass through the wooden plank, we need to calculate the acceleration first using the equation of motion.

By rearranging the equation and substituting the given values, we can find the acceleration.

Then, using the equation of motion again, we can solve for time.

The negative sign in the acceleration indicates that it is in the opposite direction of the initial velocity.

The resulting time is 0.0025 seconds.

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Answer:it is a

Explanation:because No matter whether you are talking about vibrations or waves, all of them can be characterized by the following four characteristics: amplitude, wavelength, frequency, and speed.

Answer:

A

Explanation:

These 4 are the main characteristics which you should have learned in your class. Hope it helps!

Answer:

0.6 ☻︎☻︎☻︎☻︎☻︎☻︎☻︎☻︎☻︎☻︎☻︎

The Sirius star in the constellation Canis Major will set in the middle of March at a time approximately one hour earlier compared to the middle of February.

The time at which a star sets in the sky gradually shifts earlier each night due to the Earth's orbit around the Sun. This phenomenon is known as sidereal time. In the middle of February, at 2 am, Sirius would be setting. As we move towards the middle of March, the Earth's orbital motion causes the constellations to appear to shift slightly earlier each night. Consequently, Sirius would set at around 1 am in the middle of March, around one hour earlier than in February. It is important to note that the exact time may vary based on the observer's location and specific year, but the general trend remains the same.

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In a circuit, three wires form a junction. The current in one of the wires is either 7A or 17A, which is either the sum of the currents in the two-wire or the difference of current between two wires.

Electric current is the movement of charged particles (electrons or ions) through a current-carrying conductor, under the effect of potential difference induced between the ends of the conductor. It's measured in Ampere(A), which is the SI unit for current. Current in a circuit is measured using a device referred to as an ammeter.

When several conductors or semiconductors come into physical touch, the result is an electrical junction. Thermoelectricity junctions, metal-semiconductor junctions, and p-n junctions are a few different forms of electrical junctions.

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The ratio of the height attended by the object thrown upward to that thrown at some angle θ with the vertical is 1.  

Note: It is assumed that the mass of the first object is m and the mass of the second object is 2m. Also, the first object is thrown upward and the second object is thrown at some angle θ with the vertical.

Projectile motion: Any object that is thrown in the air is called a projectile and the motion described by it under gravity is called the projectile motion.  

If the air resistance is neglected, then the acceleration due to gravity g is the same for all objects irrespective of their masses. It is given that both objects remain in the air for the same time period. So first calculate the time period for the objects when they are in the air.

Time period of the first object: The first object is thrown in the air upwards so from the second kinematics equation,

h1=u1*t1-(1/2)*gt1^2

where h1 is the height, t1 is the time, and u1 is the initial velocity for the first object.

When the object is not in air h1=0, so

0=u1*t1-(1/2)*gt1^2

After solving the above quadratic equation, the values of t1 obtained are t1=0 which represents the initial time, and t1=2u1/g which represents the time period. So the time period of the first object is,

t1=2u1/g

Time period of the second object: The second object is thrown at some angle θ with the vertical as shown in the diagram. From the diagram, the initial velocity along the vertical direction is,

u2=uocos(θ)

where uo is the initial velocity and u2 is the initial velocity along the vertical direction.

From the second kinematic equation,

h2=u2*t2-(1/2)*gt2^2

where h2 is the height, t2 is the time, and u2 is the initial velocity for the second object along the vertical direction.

When the object is not in air h2=0, so using u2=uocos(θ),

0=uocos(θ)*t2-(1/2)*gt2^2

After solving the above quadratic equation, the values of t2 obtained are t2=0 which represents initial time, and t2=2uocos(θ)/g which represents  the time period. So the time period of the second object is,

t2=2uocos(θ)/g

Given that the time period is the same for both cases,

t1=t2

2u1/g=2uocos(θ)/g

u1=uo cos(θ)

Calculation of the ratio of the height of the object:

The maximum height is attained when the time of the object in the air is half of the total time period. At maximum height, velocity is zero.

From the third equation of motion.

v^2=u^2-2gh

h=u^2/2g

where h is the height and u is the initial velocity of an object.

Using it and u1=uo cos(θ) and u2=uo cos(θ), the ratio of h1 and h2 is,

h1/h2=  u1^2/2g÷u2^2/2g

h1/h2=(uo cos(θ))^2/(uo cos(θ))^2

h1/h2=1

The ratio of their height will be 1.

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Technology and science support one another's advancement. New technologies are developed using scientific knowledge. New technology frequently enable scientists to examine nature in novel ways and generate novel findings.

By introducing a new area of scientific inquiry, a change in technology can have an impact on our understanding of science. For instance, the development of the microscope allowed biologists to study species that were invisible to the eye, resulting in the development of the field of microbiology.

Building new technologies with the use of scientific information frequently leads to new observations being made about the world, which in turn leads to the development of even more scientific knowledge.

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The resulting equation of motion for the system is given by m × x''(t) + k × x(t) = f(t), which is 2 × x''(t) + 18 * x(t) = 2 * sin(2t).

What is  equation of motion?

The equations of motion are a set of mathematical relationships that describe the motion of objects under the influence of forces. There are different sets of equations of motion, depending on the specific scenario and the type of motion being considered (linear motion, projectile motion, circular motion, etc.). The equations of motion for linear motion, also known as the equations of uniformly accelerated motion.

To find the equation of motion for the system, we start with Newton's second law of motion, which states that the sum of forces acting on an object is equal to the mass of the object multiplied by its acceleration. In this case, the object is the 2-kg mass attached to the spring.

The force exerted by the spring is proportional to the displacement of the mass from its equilibrium position, and it can be expressed as F_spring = -k× x(t), where k is the spring constant and x(t) is the displacement of the mass at time t.

In addition to the force exerted by the spring, there is an external force f(t) = 2 ×sin(2t) acting on the mass.

Applying Newton's second law, we have the equation of motion: m ×x''(t) + k ×x(t) = f(t).

Substituting the given values, m = 2 kg and k = 18 N/m, we obtain 2 ×x''(t) + 18 × x(t) = 2 ×sin(2t).

Therefore, the resulting equation of motion for the system is 2 × x''(t) + 18 × x(t) = 2 × sin(2t).

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