pls help, it's due tomorrow!

An electron travels 2.68 m in 6.11 × 10−8 s. How fast does it travel in cm/s? Answer in units of cm/s.

A. The acceleration of the electron is 5.71×10¹⁴ m/s²

B. The time taken for the electron to reach the grid is 7.01×10⁻⁹ s

C. The net force of the electron is 5.20×10⁻¹⁶ N

A. How to determine the acceleration of the electron

The acceleration can be obtained as illustrated below:

v² = u² + 2as

(4.0×10⁶)² = 0² + (2 × a × 0.014)

(4.0×10⁶)² = 0 + 0.028a

(4.0×10⁶)² = 0.028a

Divide both side by 0.028

a = (4.0×10⁶)² / 0.028

a = 5.71×10¹⁴ m/s²

B. How to determine the time

The time taken for the electron to reach the grid can be obtained as follow:

a = (v – u) / t

5.71×10¹⁴ = (4.0×10⁶ – 0) / t

5.71×10¹⁴ = 4.0×10⁶ / t

Cross multiply

5.71×10¹⁴ × t = 4.0×10⁶

Divide both sides by 5.71×10¹⁴

t = 4.0×10⁶ / 5.71×10¹⁴

t = 7.01×10⁻⁹ s

C. How to determine the net force

Net force = mass × acceleration

Net force = 9.11×10⁻³¹ × 5.71×10¹⁴

Net force = 5.20×10⁻¹⁶ N

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        A magnetic core made of a magnetic material, such as iron, that is encircled by a wire coil. The core is magnetized by an electric current that is passed through the coil.

    Permanent magnets are not the same as electromagnets. Coils of wire with electricity running through them make up electromagnets. An electromagnet's wire coils act like magnets when an electric current flows through them because moving charges produce magnetic fields.

      Electrons are pushed and pulled by moving magnetic fields. Electrons in metals like copper and aluminum are slackly held. The electrons in the wire are pushed by rotating a coil of wire around a magnet, or vice versa, and an electrical current is produced.

     Electromagnets are a component of every machine with an electric motor. Hairdryers, CD players, power drills, electric saws, and electric mixers are a few further examples. 

   Magnets produced by electric fields are known as electromagnets. The fact that they can be turned on and off gives them an edge over normal magnets. By wrapping a wire around an iron nail and passing current through it, electromagnets can be made.

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Given:

Waves A, B, and C travel 12.0 meters in 2.0 seconds through the given medium.

To find:

The speed, frequency, period, wavelength, and amplitude of wave A.

Explanation:

As the wave covers a distance of 12 m in 2 seconds, the speed "v" of the wave can be calculated as:

Here, d is the distance covered by the wave and t is the time required to cover the distance.

Substituting the d = 12 m and t = 2 s in the above equation, we get:

The speed of the wave A is 6 m/s.

The frequency of a wave is defined as the number of wave cycles occurring per second.

From the above graph, we observe that there are a total of four wave cycles occurring in 2 s. Thus, the frequency of wave A can be calculated as:

Here, f is the frequency of the wave, N is the number of times the wave occurs and t is the time.

Substituting N = 4 and t = 2 s in the above equation, we get:

The frequency of wave A is 2 Hz.

The period "T" of the wave is related to the frequency "f" as:

Substituting the values in the above equation, we get:

The period of wave A is 0.5 s.

The wavelength λ of the wave is related to its speed "v" and frequency "f" as:

Substituting the values in the above equation, we get:

The wavelength of wave A is 3 m.

The amplitude of the wave is the maximum distance or displacement of the point on a vibrating body measured from the equilibrium position. Thus, from the given graph, we observe that the amplitude of wave A is 2 m.

Final answer:

The speed of wave A is 6 m/s.

The frequency of wave A is 2 Hz.

The time period of wave A is 0.5 s.

The wavelength of wave A is 3 m.

The amplitude of wave A is 2 m.

Answer:

Explanation:

From the given information if we assume that the runner didn't  come back to her original position.

Her initial velocity = 0 m/s

Final Velocity = 9.6 m/s

Time Taken = 2 seconds

She started from rest therefore her initial time would be 0 seconds.

We know that,

Average acceleration = (final velocity - initial velocity)/(final time - initial time)

=(v-u)/t1-t0

=(9.6 - 0)/(2-0) m/s^2

=4.8 m/s^2

NO is the catalyst in this reaction. Because, a Catalyst increases the rate of a reaction without being used up. Catalyst does this by lowering the activation energy needed.

ANSWER:

13.6 m/s

STEP-BY-STEP EXPLANATION:

The speed of the impact would be the resulting velocity between the initial velocity (which according to the statement is a vertical velocity) and the horizontal velocity.

Now we know the vertical and horizontal components of velocity we can find the resultant by means of the Pythagorean theorem. Using Pythagoras we can say that:

Therefore, the impact speed is 13.6 m/s

Yes, if one follows the mentioned steps, they could determine the toy car's acceleration from the data of time taken in the video.

a = v / t

v = d / t

a = Acceleration

v = Velocity

d = Distance

t = Time

d = 1 m

Let the video time recorded from the video be x s.

t = x s

v = 1 / x

a = 1 / x / x

a = 1 / x² m / s²

Velocity is the rate of change of distance. Its unit is m / s. It is denoted as v. Acceleration is defined as the rate of change in velocity with respect to time. Its unit is m / s². It is denoted as a.

Therefore, if I follow steps given, I could determine the acceleration of the toy car as 1 / x² m / s²

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The average speed of the train is 71.52 meters per second.

The total distance the object covers in a given amount of time is its average speed. It's a scalar quantity. Average speed has no direction and is represented by the magnitude. The equation of average speed is given below.

[tex]v_{avg} = \frac{distance}{time}[/tex]

The distance and time is given in the problem and they are 386.243 kilometers and 90 minutes respectively.

The distance in meters = 386.243*1000 = 386243 m

The time in seconds = 90*60 = 5400 s

The average speed = 386243 m/5400 s = 71.52 m/s

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L = 5 cm =0.05 m

sound speed = 344 m/s

F =v x λ

F = 344 x 0.05 = 17.2 hz

The magnitude of the linear acceleration is zero for all points on the chain. The angular accelerations of the two sprockets can be related as  α[tex]_{Front}[/tex] / α[tex]_{Rear}[/tex] = ω[tex]_{Front}[/tex] * t[tex]_{Rear}[/tex] / ω[tex]_{Rear}[/tex] * t[tex]_{Front}[/tex]

There are two set of point that is needed to be taken into consideration. The points in between the two sprockets and points in which the chain is in contact with the sprocket. In the former set of points, the linear velocity is constant. So its linear acceleration will be zero. In the latter set of points, the tangential velocity ( Linear velocity in circular motion ) is constant. So the tangential acceleration ( Linear acceleration in circular motion ) will be zero.

Since the chain is constantly changing direction while on the sprocket, it will always have angular acceleration.

α = ω / t

α = Angular acceleration

ω = Angular velocity

t = Time

α[tex]_{Front}[/tex] / α[tex]_{Rear}[/tex] = ω[tex]_{Front}[/tex] * t[tex]_{Rear}[/tex] / ω[tex]_{Rear}[/tex] * t[tex]_{Front}[/tex]

Therefore,

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The evidence would you expect to find on the Moon if it had been subjected to plate tectonics here would be volcanos and mountains.

The iron core of the collision object may have fallen into a larger body. The moon is primarily made of silver rock, but the earth contains more metal and volatile compounds. The earth has an iron core, but not the moon. There is liquid water on the surface of the earth, but not on the moon. Mercury contains much more metal than the moon with a considerable amount of iron-nickel core.

Both celestial bodies lack the water of the liquid that erases the collision crater over time. Also, on planets such as Earth and Venus, there is no atmosphere that can be disassembled before the meteor clashes on the ground. However, old craters can be eroded by new collision events. Moon rocks are similar to the earth's crust but rarely contain metal. The rotation speed is too slow.

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Answer: C. Determine how long the reaction will take.

A total of 90 generations have passed during the last 2,000 year.

Generation or also referred era alludes to all of the individuals born and living at around the same time, respected collectively. It can too be portrayed as, "the normal period, by and large considered to be approximately 20–⁠30 a long time, amid which children are born and develop up, gotten to be grown-ups, and start to have children." whereas A lifetime is the complete length of time an individual or other living thing is live. Since we have given that the Life expectancy is about 70 years and the generation is one-third of a lifetime.

So, one-third of 70 is approximate 23, which means one generation is about 23 years

So, since we have to calculate the number of generations passed in 2000  years,

so 2000/23 = 86.95

which is approx 90.

So the estimated number of a generation passed is 90

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Answer:

Friction is a force that resists the relative motion of objects sliding against each other. It depends on the nature of the surfaces of the two objects interacting with each other, as well as how much they are pressed together.

Explanation:

Answer: Friction.

Explanation: is a force that resists the relative motion of objects sliding against each other. It depends on the nature of the surfaces of the two objects interacting with each other, as well as how much they are pressed together.

The term "reflected ray" refers to a beam of light or other radiant energy that is reflected back from a nonpermeable or non absorbing surface. The light beam that returns from the surface of reflection is referred to as the reflected ray. The incident's normal and reflected rays all rest on the same plane.

The angle of incidence is the angle formed by an incident ray and the normal, or line perpendicular to the incident surface, at its point of incidence. Any wave, including optical, acoustic, microwave, X-ray, and others, can create a ray.

When light strikes a smooth surface, reflection occurs when the light bounces back.

Refraction is the bending of light beams as they pass through different media. usually happens on shiny surfaces that only allow light to bounce off of them rather than pass through them.

A mirror image is a reflected duplicate of a seemingly identical item that is turned the other way in the plane perpendicular to the mirror surface. It appears as an optical phenomenon as a result of reflection from surfaces like water or mirrors.

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Answer:

The change in momentum is 2 times the length of the momentum vector put in the negative direction.

Explanation:

The change in momentum is defined as

meaning it is the difference between the final and the inital momentum.

Now, our initial momentum is

it is in the positive i-direction.

The final momentum is

and it is in the negative i-direction.

Therefore, the change in momentum is

which is our answer!

Now, what is the direction and magnitude of this momentum vector?

This vector has length 2 and points in the negative i-direction.

The gravitational potential energy paper airplane have PE = 0.735J.

To calculate the potential energy we are going to use the formula,

PE = mgh

where,

PE is gravitational potential energy

m is mass of object

g is gravitational acceleration

h is height

So, given data are :

m = 0.005Kg

g = 9.8 m/s²

h = 1.5 m

PE = ?

Now, putting the values

PE = 0.005Kg x 9.8 m/s² x 1.5 m

PE = 0.0735 J

Hence, the gravitational potential energy paper airplane have is PE = 0.0735J

The potential energy that a huge item has in relation to another massive object due to gravity is known as gravitational energy or gravitational potential energy. When two objects descend toward one another, potential energy associated with the gravitational field is released.

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An object under uniform circular motion experiences a centripetal acceleration, directed towards the center of the circular trajectory.

Therefore, the correct option is:

ANSWER:

(a) 112.58 m/s

(b) 16463.98 N

STEP-BY-STEP EXPLANATION:

Given:

Frequency (F) = 35.5 Hz

Mass (m) = 0.656 kg

Radius (r) = 50.5 cm = 0.505 m

(a) To determine the speed with which the mass moves, we must first calculate the angular speed, like this:

Now we can calculate the speed, with the help of the radius:

(b) The centripetal force is calculated using the following formula:

Answer:

according to me the fourth one is the right answer

36.8 (m) are the x- and y-components of the rocket's velocity 12.2 s after it is fired.

0.41 m / s³ is the position vector of the rocket 12.2 s after it is fired

Any process where the velocity varies is referred to as acceleration. There are only two ways to accelerate: increasing your speed or changing your direction, or altering both. This happens because speed is both a speed and a guidance.

This is an exercise in kinematics in two dimensions, the easiest way to solve it is to work each axis independently

To find the other two constants we must know the acceleration formula,

a = dv / dt = d²v / dt²

vₓ = dx / dt = 2Bt

d²x / dt² = 2B

aₓ = 2B= dy / dt = 3D t2

d²y / dt² = 6D t

They give us the acceleration for time t = 1.20s

aₓ = 2B = 3.30 m / s2

B = 1.65 m / s²

ay = 6D t = 2.50

D = 3.00 / 6 1

D = 0.41 m / s³

The acceleration vector is

a = aₓ i ^ +  j ^

a = 3.3 i ^ + 2.5 t j ^

v = vx i ^ + vyj ^

v = 3.3 t i ^ + 1.25 t²

velocity for t= 12.2 s

v = 3.3 t i ^ + 1.25 t²

v = 3.3 10 i^ + 1.5 10² j^

v= (33 i^ + 150 j^ ) m/s

Position for t = 12.2 s

x = 1.65 t² = 7 10²

x = 165 m

y = 36.8 +0.41 t³ = 36.8 + 0.41 10³

y = 446.8 m

D = (165 i ^ + 446.8 j ^) m

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If the total gas pressure is raised from 5 atm to 20 atm in N2(g) + O2(g) < -- > 2 NO(g), there will be no shift in the equilibrium as both sides have the same number of moles of gases (5)

According to Le Chatelier's principle, some factors like pressure, temperature, concentration can affect the equilibrium of the reaction. If the factors that affects the equilibrium are changed, the equilibrium will shift in the same direction of the effects caused by these changes. As a result, the changes would be nullified.

In the reaction N2(g) + O2(g) < -- > 2 NO(g), as the reactants and products have the same number of moles, the pressure has no effect on them. Even if we increase or decrease the pressure, the equilibrium remains the same as the change in pressure doesn’t cause any effects on the reaction.

Therefore, if the total gas pressure is raised from 5 atm to 20 atm, there will be no shift in the equilibrium as both sides have the same number of moles of gases (5)

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The satellite's altitude above the surface of the earth  is mathematically given as

h =9590835m

This is further explained below.

Generally, When we write Newton's Second Law and Newton's Gravitational Law on the satellite (which has a mass of m and is undergoing an acceleration of a), which is circling Earth (which has a mass of M), and we use r to represent the distance between their centers, we get the following equation:

[tex]F=m a=\frac{G M m}{r^2}[/tex]

Since this acceleration is centripetal, we can write:

[tex]\frac{v^2}{r}=a=\frac{G M}{r^2}[/tex]

So we have:

[tex]v^2=\frac{G M}{r}[/tex]

This distance r is equal to the sum of Earth's radius R and the satellite's height h (r=R+h)$, therefore for our values, we get (in standard international format):

[tex]h=\frac{G M}{v^2}-R\\\\\=\frac{\left(6.67250 \times 10^{-11} \mathrm{Nm}^2 / \mathrm{kg}^2\right)\left(5.98 \times 10^{24} \mathrm{~kg}\right)}{(5000 \mathrm{~m} / \mathrm{s})^2}-6370000 \mathrm{~m}\\\\[/tex]

h =9590835m

In conclusion,  the satellite's altitude above the surface of the earth

h =9590835m

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Answer:

14,200 cm^2

Explanation:

When multiplying two numbers with different significant figures, the significant figures of the product carries the significant of figures of the number with the least significant figures.

Therefore, in finding the area, we have to multiply 91.1 ( 3 significant figures) by 155. 1 (4 significant figures). This tells us that our product will have 3 significant figures.

Now,

rounding to the three significant figures gives

Hence, the area of the rectangle is 14200 square centimetres.

The true statement about scientific theories are;

(d) They are supported by a large body of evidence and .

(e) They are undeniable truths accepted by scientists.

A scientific theory is an explanation of an aspect of the natural world and universe that has been repeatedly tested and corroborated in accordance with the scientific method, using accepted protocols of observation, measurement, and evaluation of results.

Characteristics of scientific theory include the following;

The following are some of the characteristics of scientific theories;

Thus, scientific theories must be supported by a large body of evidence.

and they are undeniable truths accepted by scientists.

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Answer:

Iron in Your Blood

Explanation:

Hope this helps.

1) The time taken is  6.37 s

2) The velocity at maximum height is 0 m/s

3) The initial velocity is 62.4 m/s.

4) The maximum height is  198.66 m

Let us recall that in this case, we have to use the equation of the motion that occurs under gravity In this case we have to take into account the the upwards motion is negative in the opposite direction as gravity and the down wards motion is positive and in the same direction as gravity.

1) Given that;

time is the same as the time taken to go up and come down thus the time taken to reach the maximum height is 12.74 seconds/2 = 6.37 s

2) The velocity of the rocket at the maximum height is zero because it momentarily comes to rest.

3) The initial velocity of the rocket is;

v = u - gt

At the maximum height v = 0 m/s

u = gt

u = 9.8 m/s^2 *  6.37 s

u = 62.4 m/s

4) The maximum height is obtained from;

v^2 = u^2 - 2gh

v = 0 m/s

u^2 = 2gh

h = u^2/2g

h = (62.4 m/s)^2/2 * 9.8 m/s^2

h = 198.66 m

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The acceleration of the car within the time frame that have been shown in question is obtained as -0.14 m/s^2.

We define the acceleration as the rate of change of the distance of the object with time. We know that acceleration is a vector quantity thus the magnitude and the direction of the acceleration is counted as important in the process.

We have;

a = v - u/t

a = acceleration

v = final velocity

u = initial velocity

t = time taken

a = 3.7 m/s - 6.1 m/s/ 17 s

a = -0.14 m/s^2

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The magnitude and direction of the plane's total displacement are 7.66 km and angle of 26.2 degree respectively.

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