Instruction: Answer all questions Time: 1. 5hrs An electron is placed in a uniform electric field with field strength of 150kvm Calculate the duration for it to travel 30mm from its stationary Position Give an explanation for your answer. ​

Answer:

2) Milligrams

Explanation:

\(\boxed{\sf v^2-u^2=2gh}\)

\(\\ \sf\longmapsto h=\dfrac{v^2-u^2}{2g}\)

\(\\ \sf\longmapsto h=\dfrac{0^2-15.5^2}{2(10)}\)

\(\\ \sf\longmapsto h=\dfrac{240.25}{20}\)

\(\\ \sf\longmapsto h=12.012m\)

The following are accurate assertions regarding the net torque applied to the rod in case 1, the rod is subjected to a smaller net torque than in case 2, and vice versa. The correct options are A and D.

The rotating force imposed on an object is measured in torque. The tendency of an object to rotate about an axis is a vector quantity.

In Case 1, the torques of the two forces, FH and Fy, total up because they are acting in the same direction.

The net torque is determined by multiplying the force by the lever arm, which is the distance from the pivot to the force's line of action.

Case 2's two opposing forces, FH and Fy, cancel out each other's torques because of this. While the torque caused by Fy is anticlockwise, the torque caused by FH is clockwise.

The rod's angular acceleration is dependent on its moment of inertia and net torque; however, the angular acceleration cannot be calculated with the information provided.

Thus, the correct options are A and D.

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Your question seems incomplete, the probable complete question is:

According to the question (a) The average velocity for the first 4 s is 0 m/s , (b) The instantaneous velocity at t=6 s is 6 m/s , (c) The average acceleration between 0 and 4 s is 0 m/s² ,  (d) The time for the race is 6 s.

(a) The average velocity of the object for the first 4 seconds can be calculated using the formula:

\(\[ \text{Average velocity} = \frac{\text{Change in position}}{\text{Change in time}} \]\)

Given that the object's position changes from its initial position to its position at 4 seconds, we can find the average velocity by dividing this change in position by the time interval of 4 seconds.

(b) To find the instantaneous velocity at \(\( t = 6 \)\) seconds, we need to differentiate the position function with respect to time and evaluate it at \(\( t = 6 \).\)

(c) The average acceleration between 0 and 4 seconds can be determined using the formula:

\(\[ \text{Average acceleration} = \frac{\text{Change in velocity}}{\text{Change in time}} \]\)

By calculating the change in velocity over the time interval of 4 seconds, we can find the average acceleration.

(d) The time for the race can be determined by finding the time at which the object reaches its final position.

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Answer:

Measure the length of a number of waves then divide by the number of waves to calculate the wavelength. wavelength. Count the number of waves passing a point in ten seconds then divide by ten to record frequency. Calculate the speed of the waves using: wave speed = frequency × wavelength.

The focal length of the lens is 39.3 mm. The result is obtained by using the thin lens equation.

The Thin Lens Equation is the equation used on a thin positive or negative lens.

\(\frac{1}{f} = \frac{1}{d_{1} } + \frac{1}{d_{2} }\)

Where

We have a camera with the film 36.9 mm away from the lens and the object distance is 59.2 cm. Determine the focal length!

Let's convert the object distance's unit!

59.2 cm = 592 mm

The distance of the film from the lens is the image distance. So, the focal length is

\(\frac{1}{f} = \frac{1}{d_{1} } + \frac{1}{d_{2} }\)

\(\frac{1}{f} = \frac{1}{592 } + \frac{1}{36.9 }\)

\(\frac{1}{f} = \frac{(592-36.9)}{21844.8 }\)

\(\frac{1}{f} = \frac{555.1}{21844.8 }\)

\(f = \frac{21844.8}{555.1}\)

f = 39.3 mm

Hence, the focal length of a lens in the camera is 39.3 mm.

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Answer:

Explanation:you knoe i know

Answer:

NO ANSWER

Explanation:

there is no tragectory or diagram given

WHICH OBJECT?

The cyclist can climb the same hill at a speed of 16.6 km/h using the same power.

To solve this problem, we need to use the concept of conservation of energy. When coasting down the hill at a steady speed of 12 km/h, the potential energy of the cyclist and the bicycle is converted to kinetic energy. At this speed, the force of friction is equal to the force of gravity, so the net force on the cyclist is zero. When pumping hard and descending the hill at a speed of 32 km/h, the cyclist is using more power to overcome the force of friction and increase the net force in the downhill direction.

To find the speed at which the cyclist can climb the same hill, we need to determine the power output of the cyclist and the force of friction when going uphill. Let's start by finding the force of friction. We know that Ffr=bv^2, where b is a constant. At 12 km/h, the force of friction is equal to the force of gravity, so we can set them equal to each other:

Fg = Ffr
mg sin(theta) = bv²

where m is the mass of the cyclist and the bicycle, g is the acceleration due to gravity, theta is the angle of the hill (4.0 degrees), and v is the speed of the cyclist. Solving for v, we get:

v = √((mg sin(theta))/b)

Plugging in the values, we get:

v = √((75 kg x 9.81 m/s² x sin(4.0))/b) = 4.60 m/s

Converting to km/h, we get:

v = 16.6 km/h

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The approximate arc length of one slice of pie when a pie is cut into 6 pieces if the diameter of the pie is 10 inches is 5π/3in.

Given the diameter of apple pie (d) = 10 inches

Then, the radius of each piece (r) = 10/2 = 5 inches

The number of apple pieces = 6

Let the angle made by each apple piece = θ

Let the arc length = L

We know that the circumference of the circle is represented as:

C = 2πR = 2π*5 (in) = 10π (in)

When a pie is sliced into six equal pieces, the circumference is also divided into six equal arcs, which equals 10π/6 (in) = 5π/3 (in)

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complete question: A pie is cut into 6 pieces if the diameter of the pie is 10 inches. what is the approximate arc length of one slice of pie?

Pie = symbol

A- 10pie / 3

B- pie

C- 5pie / 6

D- 5pie / 3

Answer:

threy need to do it. becuse they do

Explanation:

The findings that most likely contributed to Jenna's conclusion were a change in smell. Option A is correct.

A fragrance, usually an unpleasant one: The smell of sweaty feet was palpable throughout the space. Our body odor has a big impact on the kinds of scents we enjoy.

The complete question is;

"Jenna pulled out an open bowl of leftover mashed potatoes from the fridge and smelled something different. She discovered that since the potatoes were initially placed there, chemical changes had taken place. Which facts most likely supported Jenna's judgment?

a change of odor

a decrease in temperature

a change in moisture content

a decrease in mass"

The observation that most likely inspired Jenna to draw her conclusion was a change in odor.

Hence, option A is correct.

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Answer:

A change in odor

Explanation:

Answer:

D I'm pretty sure :)

Explanation:

hope this helps

The force exerted by the object having a mass of 5 kg is 10.79 N

The mass of the object, m = 5 kg

The velocity of the object from rest, v = 47.5 m/s

The time taken, t = 22 s

The formula to find the force exerted on the object is

              F = ma

where m is the mass of the object

           a is the acceleration of the object

But we know that

          a = v/t

where v is the velocity of the object

           t is the time taken

So, let us substitute the equation of the acceleration in the force equation, we get

          F = mv/t

Now, let us substitute the known values in the above equation,

        F = 5 x 47.5 / 22

           = 237.5 / 22

           = 10.79

Therefore, the force exerted by the object is 10.79 N

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Explanation:

a don't know ask someone body els

Answer:

The acceleration of the car with the mass of 1200kg and a force of 11 × 10³N is 9.17m/s²

Explanation:

The correctly written chemical equation that demonstrates the conservation of mass is:

\(H_{2} + O_{2} - > H_{2}O\)

The law of conservation of mass is a fundamental principle in chemistry and physics that states that mass cannot be created or destroyed in a chemical reaction or a physical process. In other words, the total mass of the reactants must be equal to the total mass of the products in any chemical reaction. This means that the number of atoms of each element present in the reactants must be equal to the number of atoms of the same elements in the products.

\(H_{2} + O_{2} - > H_{2}O\)

This equation shows the reaction between hydrogen gas and oxygen gas to produce water vapor. The equation is balanced, which means that the number of atoms of each element on both sides of the equation is equal, and therefore, the law of conservation of mass is upheld.

The law of conservation of mass is important in chemistry because it allows chemists to predict the outcome of a reaction and to calculate the amount of reactants needed to produce a certain amount of product. It also ensures that the total amount of matter in the universe remains constant, which is a fundamental concept in modern physics.

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Therefore, the angle between vectors `u` and `v` is 90°.

To find the angle between two vectors, we can use the formula:

`cos(θ) = (u . v) / (||u|| ||v||)`

Where u and v are vectors, `.` is the dot product of vectors and || || is the magnitude of a vector.θ is the angle between the two vectors.

In this problem, we need to find the angle between vectors `u` and `v`.

We have the following vector

s:u = (2, 3, 0) and v = (3, −2, 1)

Let's find the dot product of vectors `u` and `v`.u .

v = 2 × 3 + 3 × (−2) + 0 × 1

= 6 − 6 + 0

= 0

Let's now find the magnitudes of vectors `u` and `v`.||u|| = √(2² + 3² + 0²) = √(13) and

||v|| = √(3² + (−2)² + 1²)

= √(14)

Now, we can use the formula to find the angle between vectors `u` and `v`.cos(θ) = (u . v) / (||u|| ||v||)cos(θ)

= 0 / (√(13) × √(14))cos(θ)

= 0θ

= cos⁻¹(0)θ

= 90°

The angle between the vectors u = (2, 3, 0) and v = (3, −2, 1) is 90 degrees.

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Secularization is A. the process through which religion's influence on other social institutions diminishes.

This phenomenon occurs when religious values, beliefs, and practices become less central to the functioning of a society and its various sectors, such as politics, education, and economics. As societies evolve, secularization tends to increase as people place greater emphasis on rationality, scientific knowledge, and individual autonomy. This shift reduces the impact of religious institutions and their authority over public and private life, leading to a more diverse and pluralistic society.

While religion may still play a significant role in some individuals' lives, its influence on societal structures and decision-making becomes less prominent. Ultimately, secularization allows for a broader range of perspectives and values to contribute to social progress, reflecting the complex and evolving nature of modern societies. So therefore the correct answer is A. the process through which religion's influence on other social institutions diminishes, this is called secularization.

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The position of the object is the property that distinguishes the potential energy from kinetic energy.

What is potential energy?

The potential energy of a body or system is due to the position of the different components.

\(U = mgh\)

Where,

\(m\) - mass

\(g\) - graviatational acceleration

\(h\) - height

The kinetic energy of a body is due to its motion. It can be given as,

\(KE = \dfrac 12 mv^2\)

Where,

\(v\)- velocity

Since both potential energy and kinetic energy depend upon the mass, power, can perform work.

Therefore, the position of the object is the property that distinguishes the potential energy from kinetic energy.

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each of two or more forms of the same element that contain equal numbers of protons but different numbers of neutrons in their nuclei, and hence differ in relative atomic mass but not in chemical properties; in particular, a radioactive form of an element.

Answer:

left atrium

Explanation:

its the first chamber of the heart to receive oxygenated blood from the lungs

Because the current surge in starting multiple motors is too great for the system, a delay between the starting of each motor is necessary.

When multiple motors start simultaneously, they draw a significant amount of current, resulting in a high inrush current that can overload the electrical system. To prevent this, a delay is introduced between the starting of each motor. This delay allows the system to stabilize and accommodate the initial surge in current before the next motor is started. By staggering the motor start times, the overall current demand is distributed more evenly, reducing the strain on the electrical system. This practice helps to prevent voltage drops, voltage fluctuations, and potential damage to electrical components. Therefore, introducing a delay between the starting of each motor is essential to ensure the proper functioning and longevity of the system.

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Answer:

Option C

Explanation:

Light is an electromagnetic wave as it has characteristics of both electrical and magnetic waves. It is not a mechanical wave. Water and sound wave are mechanical wave as they need some medium to travel while light do not need any medium to travel.

Hence, option C is correct

\(\qquad\qquad\huge\underline{{\sf Answer}}\)

Here we go ~

As we have been given, The spring of spring constant " m " was cut to form 2 new springs in ratio of 5 : 3.

we have to find out the spring constant of the longer spring which was formed, and it's given that spring constant of the main spring was " m "

Now, let the length of main spring be " l "

So, lengths of the resultant springs will be :

\(\qquad \cal \dashrightarrow \: \dfrac{5l}{8} \: \: and \: \: \dfrac{3l}{8} \: \: \: \: respectively\)

And we know that spring constant is inversely proportional to length of spring so, we infer that :

\(\qquad \cal \dashrightarrow \: m\propto \dfrac{1}{l} m \: \: \: \: \: - (1)\)

where, m is spring constant of main spring and l is its length.

\(\qquad \cal\dashrightarrow \: m_1 \propto \dfrac{8}{5l} \: \: \: \: \: \: \: - (2)\)

where, m1 is spring constant of longer spring, and 5l/8 is its length.

let's divide (2) by (1), we will get ~

\(\qquad \cal \dashrightarrow \: \dfrac{m_1}{m} = \dfrac{8}{5l} \div \dfrac{1}{l} \)

\(\qquad \cal \dashrightarrow \: \dfrac{m_1}{m} = \dfrac{8}{5l} \times \dfrac{l}{1} \)

\(\qquad \cal \dashrightarrow \: \dfrac{m_1}{m} = \dfrac{8}{5} \)

\(\qquad \cal \dashrightarrow \: {m_1}{} = \dfrac{8}{5} m \)

So, the spring constant of equivalent longer strong formed will be 8/5 m

prove:

\(m_2 = \frac{8m}{5} \)

Explanation:

Given:

Spring constant of spring= m

The ratio of spring = 5:3

To find:

spring constant of the larger piece of spring?

Solution:

Let the length of larger piece L2 be 5x and smaller piece L1 be 3x with spring constant m2 and m1 respectively.

now,

spring constant (m) inversely proportional to the length of spring i.e.

\(m \propto \: \frac{1}{l} {,}\: m_1 \propto \: \frac{1}{l_1} {,}\: m_2 \propto \: \frac{1}{l_2}\)

Also,

The spring is connected in series hence,

\( \frac{1}{m} = \frac{1}{m_1} + \frac{1}{m_2} \)

and

\( \frac{m_1}{m_2} = \frac{l_2}{l_1} \\ {m_1} = {m_2} \cdot \frac{l_2}{l_1} \\ {m_1} = {m_2} \cdot \frac{5}{3} \\ \)

Substituting above value in,

\( \frac{1}{m} = \frac{1}{m_1} + \frac{1}{m_2} \\ \frac{1}{m} = \frac{1}{{m_2} \cdot \frac{5}{3}} + \frac{1}{m_2} \\ \frac{1}{m} = \frac{3}{5m_2} + \frac{1}{m_2} \\ \frac{1}{m} = \frac{3m_2 + 5m_2}{5 {m_2}^{2} } \\ \frac{1}{m} = \frac{8m_2}{5 {m_2}^{2} } \\ \frac{1}{m} = \frac{8 \cancel {m_2}}{5 \cancel{m_2}^{2} } \\ \frac{1}{m} = \frac{8}{5m_2} \\ m_2 = \frac{8m}{5} \)

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If net force acting on object is 0, then the force is considered to be balanced (option A).

A net force refers to the sum of all the forces acting on an object.

The net force can accelerate a mass. Some other force acts on a body either at rest or motion. The net force is a term used in a system when there is a significant number of forces.

Fnet = F₁ + F₂ + F₃.............+ Fn

When the net force of an object is zero (0), this means that the sum of forces acting on the object is balanced. A balanced forces are forces that are opposite in direction and equal in size.

Therefore, a net force of 0 is a balanced force.

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Answer:

Oblique

Explanation:

I think that's the answer I was told this but forgot if this is the right answer if not then sorry

The three categories of atomic solids are network covalent, body-centered cubic, and face-centered cubic.

Network Covalent: Network covalent solids are composed of atoms connected by strong covalent bonds in a continuous three-dimensional network. This category includes substances like diamond and quartz. In these solids, each atom is bonded to its neighboring atoms through covalent bonds, forming a strong and rigid structure. Network covalent solids have high melting points and are generally hard and brittle.

Body-Centered Cubic (BCC): Body-centered cubic solids have a crystal structure in which atoms are arranged in a cubic lattice, with an atom located at the center of the cube and additional atoms at each corner. Iron and chromium are examples of metals that exhibit a body-centered cubic structure. BCC metals have relatively high melting points and good mechanical properties due to the close-packed arrangement of atoms.

Face-Centered Cubic (FCC): Face-centered cubic solids also have a cubic lattice structure, but in this case, there is an additional atom located at the center of each face of the cube. Examples of metals with a face-centered cubic structure include aluminum, copper, and gold. FCC metals have similar properties to BCC metals, with high melting points and good mechanical strength.


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The electric potential at 70 cm to the right of the left charge is 7.125 x \(10^3 V.\)

To calculate the electric potential at a point due to two point charges, we need to use the following formula:

V = kq1 / r1 + kq2 / r2

where V is the electric potential, k is Coulomb's constant (\(9 x 10^9 N m^2 / C^2\)), q1 and q2 are the magnitudes of the charges, r1 and r2 are the distances between the point and the charges.

In this case, the left charge has a magnitude of 3 micro-c and the right charge has a magnitude of 7 micro-c. The distance between the left charge and the point of interest (70 cm to the right of the left charge) is 120 cm, and the distance between the right charge and the point of interest is 50 cm.

So, plugging in the values, we get:

V = (9 x \(10^9\)N \(m^2\) / \(C^2\)) x (3 x \(10^-6\) C) / 1.2 + (9 x \(10^9\) N \(m^2\) / \(C^2\)) x (7 x \(10^-6\) C) / 0.5

Simplifying this expression gives:

V = 7.125 x\(10^3\) V

Therefore, the electric potential at 70 cm to the right of the left charge is 7.125 x \(10^3 V.\)

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The iron filling's mass is equal to 0.38 x 0.7 x 8 x 102 kg.

5,023,360 J of heat are absorbed.

This question uses the rule of conservation of energy, which states that energy cannot be created or destroyed but can only be transformed from one form to another.

In this instance, the energy is changed from kinetic energy (force) to thermal energy (heat) (motion of the iron particles).

Mass of iron filling is calculated as follows: Volume of box x Fill Ratio x Iron Density

= 0.38m² x 0.7 x 8 x 10²

= 22.08 kg

Amount of heat absorbed = Mass of the iron filler x Iron's specific heat capacity x (Temperature of Iron - Temperature of Box)

= 1.500° to 25°C x 22.08 kg x 460 Jkg-14k-1

= 5,023,360 J

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