HiA stone of mass 2.0kg is attached to one end of
stringed of length 1.5m, if the stort is swung round in a
horizontal circle at 1 rev/sec, Calculate the tension in the
Spring. [take ^3·14

Answer:

323.4N

Explanation:

Given parameters:

Mass of the box = 33kg

Unknown:

Normal force on the body  = ?

Solution:

The normal force of a body is the vertical force the body exerts on another body.

It is expressed as;

        Normal force  = mass x acceleration due to gravity

Acceleration due to gravity  = 9.8m/s²

Normal force  = 33 x 9.8  = 323.4N

Each and every ounce of potential energy begins to transform into kinetic energy. Also, the height at the bottom is zero and is not present. Her ability to sense energy is thus at its optimum, and potential energy equals zero.

Kinetic energy is indeed the power a thing has as a result of motion. Applying a force is necessary in order to accelerate an object. We must exert effort in order to apply a force. Once the job is finished, energy is transferred to the item, which then moves at a new, constant speed.

An object or particle has kinetic energy because of its motion. When an item undergoes work—the transfer of energy—by being subjected to a net force, it accelerates and acquires kinetic energy.

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Answer:

Explanation:

First, remember your age.

Then, multiply it times 365 x 24 x 60 x 60.

Or basically, multiply it times 315.36 x 10⁵

The temperature T of the lump of metal after t minutes, assuming it obeys Newton's Law of Cooling, can be expressed as T = -30kt + 30. However, the value of the cooling constant k is not provided, so it is not possible to determine the exact temperature without additional information.

Newton's Law of Cooling states that the rate of change of temperature of an object is directly proportional to the temperature difference between the object and its surroundings. Mathematically, this can be expressed as:

dT/dt = -k(T - Ts)

where dT/dt is the rate of change of temperature with respect to time, T is the temperature of the object, Ts is the temperature of the surroundings, and k is the cooling constant.

In this case, we can use the given data to find the value of k. After 10 minutes, the temperature of the lead block was 60oF, and the temperature of the surroundings was held constant at 80oF. Plugging these values into the equation, we have:

dT/dt = -k(60 - 80)

Simplifying the equation, we get:

-30k = dT/dt

Integrating both sides, we have:

∫-30k dt = ∫ dT

-30kt + C1 = T

Since the initial temperature of the lead block was 30oF, we can substitute t = 0 and T = 30 into the equation:

-30k(0) + C1 = 30

C1 = 30

Therefore, the equation for the temperature of the lump after t minutes is:

T = -30kt + 30

To determine the temperature T after a specific time t, we need to know the value of k.

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The temperature of the box and floor eventually rise as a result of the thermal energy flowing as heat inside these two things.

This is further explained below.

Generally, The energy present in a system that determines its temperature is referred to as thermal energy.

Thermal energy flows as heat. Thermodynamics is a whole field of physics that studies how heat is transmitted across various systems and how work is performed in the process (see the first law of thermodynamics).

In conclusion, This thermal energy is transferred in the form of heat throughout the box as well as the floor, which eventually results in an increase in temperature for both of these locations.

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Answer:

Let's define t = 0 as the moment when the ball hits the wall.

in this moment, we have a given acceleration, but if we only want to calculate the average acceleration, then let's consider the acceleration constant.

a(t) = A.

To find the velocity equation we should integrate, and the constant of integration will be the initial velocity, in this case, is 14.3m/s.

v(t) = A*t + 14.3m/s

Now we know that at t = 0.011s, the velocity is -13.5m/s (the sign is negative because the ball is moving in the opposite direction as before).

Then we can solve the equation:

v(0.011s) = -13.5m/s = A*0.011s + 14.3m/s

Now we can solve it for A, the average acceleration:

-13.5m/s - 14.3m/s = A*0.011s

(-27.8m/s)/0.011s = A = -1313.5 m/s^2

The stretching of the wire will be more in higher temperatures. The length of the telephone wire at a temperature of 35.08° C is 5.57 m.

Objects under high temperature undergo thermal vibrations and the particles moves apart by gaining thermal energy. This leads to a stretching in the size of the object called the thermal stretching.

The thermal stretching or the change in length is thus, directly proportional to the temperature. Hence, for a length of l1 and temperature T1 and length l2 at a temperature T2 can be written as follows:

l1/T1 = l2/T2

l1 T2 = l2 T1.

Given T1 = 228.08 ° C

l1 = 35.08 m

T2 = 35.08 ° C

then, l2 = (35.0 m ×  35.08 ° C) / 228.08 ° C

             = 5.57 m

Therefore, the length of the telephone wire at 35.08 ° C will be  5.57 m.

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The projectile will land approximately 37 meters from the launch point.

The projectile motion is a form of motion in which an object or a particle is projected into the air and travels along a path. It is a type of motion that is heavily influenced by gravitational force.

When a projectile is launched, it will follow a parabolic path.

The following formula can be used to determine how far the projectile travels horizontally:

x=vtcosθ

Where: x = the horizontal displacement (meters, m)v = the initial velocity (m/s)t = the time (s)θ = the launch angle (degrees)

Using the above equation, we can solve the given problem. Given:

v = 48 m/ s

θ = 26°

Let's first convert the angle to radians:

θ = 26° × (π / 180°) = 0.4536 rad

We can now solve for x:

x = vt cosθ = (48 m/s)(cos 0.4536 rad)

x = 36.59 meters

Therefore, the projectile will land approximately 37 meters from the launch point. The final answer will be 37 meters.

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Answer:two different r resistors in parallel always have the same U; two resistors in series always have the same I.

Explanation:

If two different r resistors in parallel always have the same voltage or potential difference across them and if two resistors in series always have the same electric current passing through them .

Resistance is the obstruction of electrons in an electrically conducting material .

The mathematical relation for resistance can be understood with the help of the empirical relation provided by Ohm's law .

V = I × R

The voltage is the same if the resistance is connected in a parallel arrangement .

The current is the same if the resistance is connected in a series arrangement .

Thus , If the voltage or potential difference across two separate resistors connected in parallel is always the same, as well as the electric current flowing through two resistors connected in series .

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Answer:

fly apart

Explanation:

gravity holds everything in place by constantly attracting both of the objects

without gravity, the objects would not be attracted anymore. Hence, they fly apart.

1a) The total energy stored when all three weights are raised by 70 cm is 80.5 J.

1b) The height of the tank is 2 m.

2b) The potential energy is converted into kinetic energy when the water flows out of the taps 6.32 m/s.

3a) The mass of water that goes over the falls every second is 1 x 10⁶ kg.

3b) The gravitational potential energy of 1 kg of water at the top of the falls 1000 J.

3c) The speed of the water as it reaches the bottom if all the GPE stored in 1 kg of water is transferred to kinetic energy is 44.72 m/s.

3d) The water will not be falling as fast as the speed calculated in part c suggests because of the presence of air resistance and the fact that the water falls through a medium (air) which offers resistance to its motion.

3e) The energy transferred when the GPE stored in the water falling in one second is transferred to other energy stores is finally stored in thermal energy stores due to the heat generated by the water as it hits the bottom.

1a) To calculate the amount of energy stored in the three weights, we use the formula given below:

E = mgh

Where,E = Energy (Joules)

m = Mass (kg)

g = Gravity (10 N/kg)

h = Height (m)

For the 4.5 kg weight:

E = 4.5 x 10 x 0.7 = 31.5 J

For each of the 3.5 kg weight:

E = 3.5 x 10 x 0.7 = 24.5 J

Thus, the total energy stored when all three weights are raised by 70 cm is:

31.5 J + 24.5 J + 24.5 J = 80.5 J

1b) To calculate how far the 4.5 kg weight must be lifted to store 45 J of energy, we use the formula:

E = mghh = E/mg = 45 / (4.5 x 10) = 1 m2a)

To calculate the gravitational potential energy stored in the water in the tank when it is full, we use the formula given below:

E = mgh

Where,E = Energy (Joules)

m = Mass (kg)

g = Gravity (10 N/kg)

h = Height (m)

The mass of 1 litre of water is 1 kg and the tank can hold 200 litres of water. Therefore, the total mass of water in the tank is:

Mass = 200 kg

The height of the tank is 2 m.

Therefore, the gravitational potential energy stored in the water in the tank is:

E = mgh = 200 x 10 x 2 = 4000 J

Assumptions made in the answer:

We have assumed that the tank is full.

2b) To calculate the speed at which the water would come out of the bathroom and kitchen taps, we use the formula given below:

PE = KEPE = mghKE = 1/2mv²

Where,PE = Potential Energy (Joules)

KE = Kinetic Energy (Joules)

m = Mass (kg)

g = Gravity (10 N/kg)

h = Height (m)

v = Velocity (m/s)

Assuming that the potential energy of the water in the tank is converted into kinetic energy when the water flows out of the taps, the potential energy stored in the water in the tank is given by:

PE = mgh = 200 x 10 x 2 = 4000 J

The potential energy is converted into kinetic energy when the water flows out of the taps.

Therefore, KE = 1/2mv²v² = 2KE/mv² = 2(4000)/200 = 40 m²/s²v = √(40) = 6.32 m/s (speed of the water coming out of the taps)

3a) To calculate the mass of water that goes over the falls every second, we use the formula given below:

Mass = Volume x Density

Where,Volume = 1000 m³/s, Density = 1000 kg/m³, Mass = 1000 x 1000 = 1000000 kg = 1 x 10⁶ kg

3b) To calculate the gravitational potential energy of 1 kg of water at the top of the falls, we use the formula:

E = mgh

Where,m = 1 kg, g = 10 N/kg, h = 100 m, E = 1 x 10 x 100 = 1000 J

3c) To calculate the speed of the water as it reaches the bottom if all the GPE stored in 1 kg of water is transferred to kinetic energy, we use the formula given below:

PE = KEP

E = mgh

KE = 1/2mv²

Where,PE = Potential Energy (Joules)

KE = Kinetic Energy (Joules)

m = Mass (kg)

g = Gravity (10 N/kg)

h = Height (m)

v = Velocity (m/s)

Assuming that all the potential energy is converted into kinetic energy when the water reaches the bottom,

PE = KEKE = mghv² = 2mghv² = 2(1)(10)(100)v² = 2000v = √(2000) = 44.72 m/s

3d) The water will not be falling as fast as the speed calculated in part c suggests because of the presence of air resistance and the fact that the water falls through a medium (air) which offers resistance to its motion.

3e) To calculate the total energy transferred per second as the GPE stored in the water falling in one second is transferred to other energy stores, we use the formula given below:

Power = Energy / Time

Where,Power = 1 x 10⁶ x 10 x 100 = 1 x 10⁹ W = 1 GW (assuming that 1 m³ of water falls every second)3f)

The energy transferred when the GPE stored in the water falling in one second is transferred to other energy stores is finally stored in thermal energy stores due to the heat generated by the water as it hits the bottom.

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If the two steel cylindrical rods, A and B, have the same length (l) and the diameter of rod A (da) is twice the diameter of rod B (db), and they are subjected to the same normal stress, then the stress acting on rod A will be twice the stress acting on rod B.

The stress experienced by a cylindrical rod is given by the formula stress = force/area. In this case, since both rods have the same length (l) and are made of the same material, the force applied to each rod will be the same.

However, the area of rod A (π(da/2)^2) is four times the area of rod B (π(db/2)^2) because the diameter of rod A is twice the diameter of rod B. Therefore, when the same force is applied, the stress acting on rod A will be four times the stress acting on rod B.

In conclusion, if the two steel cylindrical rods have the same length and the diameter of rod A is twice the diameter of rod B, and they are subjected to the same normal stress, the stress on rod A will be twice the stress on rod B.

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The tension in the cable is also 11,269.5 N.

Since the ramp is frictionless, the only force acting on the car is its weight which is given by:

W = m×g

where m is the mass of the car and g is the acceleration due to gravity (approximately 9.81 m/s²). Substituting the values, we get:

W = 1150 kg×9.81 m/s² = 11,269.5 N

Since the cable is holding the car in place, it must be exerting an equal and opposite force (tension - it is also a force) to counteract the weight of the car.

Therefore, the tension in the cable is also 11,269.5 N.

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Answer:

-5 m/s^2

Explanation:

10/2=5 and is is a stop so it is negitive

The initial velocity will result in the greates horrizontal displacement of the projectile. neglect firction is Option C.

The horizontal velocity of the projectile is constant. There is a vertical acceleration due to gravity with a value of 9.8 m/s/s down. The projectile's vertical velocity changes at 9.8 m/s per second. The horizontal movement of the projectile is independent of vertical movement.

At its highest point, the vertical velocity is zero. As the object falls toward the Earth its vertical velocity increases again but points in the opposite direction to its initial vertical velocity. The initial horizontal velocity can also be determined by measuring the diameter d of the sphere and dividing it by the time t it takes for the sphere to move across the photogate.

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Answer 0-60=2.2sec

Explanation:

In the peak of summer, it hasn't rained in a week, and the plants are looking rough, so watering the plants for an hour is a good idea.

However, the next day, you come back to the garden, and the plants look in worse shape than they did previously, as if none of that water made it to the plant. Plants absorb water through their roots. The root system of a plant is responsible for drawing water and nutrients from the soil. A plant's root system must be able to absorb water quickly in order for the plant to grow and thrive. When the soil around the root system is dry, the roots will stop growing and will not be able to absorb water.

It may even start to die. Watering plants during the peak of summer is important because it will help keep the soil moist and prevent the roots from drying out. However, watering a plant too much can be harmful. If a plant is overwatered, the water may not be able to penetrate the soil and reach the roots. Instead, it may just sit on top of the soil, causing the roots to rot and die. This can cause the plant to wilt and die.To summarize, if the soil around the plant is too dry, the roots may not be able to absorb the water you gave them, causing the plant to look worse than before. Conversely, overwatering can also be harmful because the water may not be able to penetrate the soil and reach the roots, causing the roots to rot and die.

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Answer:

Nobel gases

Explanation:

Well since Krypton is in a group called the “Noble Gases”, then Krypton is similar to the others; Xenon, Helium, Neon, Argon, and Radon.

Explanation:

'noble gases' which are also known as group VIII

The intensity of sunlight is 1/4 at a distance of approximately 2 astronomical units (au) from the Sun compared to Earth.

The intensity of sunlight follows the inverse square law, which states that the intensity decreases as the square of the distance increases. If we consider Earth as the reference point with an intensity of 1, we can calculate the distance at which the intensity drops to 1/4.

Let's assume that x is the distance in astronomical units (au) from the Sun where the intensity is 1/4. According to the inverse square law, we can set up the following equation:

\(\( \left(\frac{1}{4}\right) = \left(\frac{1}{x}\right)^2 \)\)

Simplifying the equation, we have:

\(\( \frac{1}{4} = \frac{1}{x^2} \)\)

Cross-multiplying, we get:

\(\( x^2 = 4 \)\)

Taking the square root of both sides, we find:

\(\( x = 2 \)\)

Therefore, at a distance of approximately 2 astronomical units (au) from the Sun, the intensity of sunlight is 1/4 the intensity at Earth.

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Answer:

set A is showing the same position in both graphs

Answer:

B

Explanation:

The answer is B.

I'm positive it's B

Answer:

Period refers to the time that it takes to do something. ... The period of a wave is the time for a particle on a medium to make one complete vibrational cycle. Period, being a time, is measured in units of time such as seconds, hours, days or years.

Answer:

Anaphase

Explanation:

This is because the spindle fibres have shortened and is pulling the chromatids towards the poles of the cell. The chromatids have also separated.

The cell division which is shown in the picture is anaphase. The correct option is C.

Meiosis is divided into two main phases, each with its own set of subphases:

1 Meiosis I:

a. Prophase I: This is the longest and most complex phase of meiosis. During this phase, homologous chromosomes pair up and form bivalents, and crossing over occurs between the homologous chromosomes. The nuclear envelope breaks down, and spindle fibers form from the centrioles at opposite poles of the cell.

b. Metaphase I: During this phase, the homologous chromosomes line up along the metaphase plate, with one chromosome from each homologous pair facing each pole of the cell.

c. Anaphase I: During this phase, the spindle fibers contract and pull the homologous chromosomes towards opposite poles of the cell.

d. Telophase I: During this phase, the chromosomes reach the poles of the cell and the nuclear envelope reforms around each set of chromosomes. The cell then undergoes cytokinesis, resulting in two daughter cells.

2. Meiosis II:

a. Prophase II: During this phase, the nuclear envelope breaks down, and spindle fibers form from the centrioles at opposite poles of the cell.

b. Metaphase II: During this phase, the chromosomes line up along the metaphase plate, with sister chromatids facing opposite poles of the cell.

c. Anaphase II: During this phase, the spindle fibers contract and pull the sister chromatids towards opposite poles of the cell.

d. Telophase II: During this phase, the chromosomes reach the poles of the cell and the nuclear envelope reforms around each set of chromosomes. The cell then undergoes cytokinesis, resulting in four haploid daughter cells.

Meiosis involves two rounds of chromosome segregation, resulting in four haploid daughter cells that are genetically distinct from the parent cell.

Therefore, The correct option is C i.e anaphase.

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Answer:

the magnet is not moving relative to the wire so B

Explanation:

The magnet is not moving relative to the wire if, A permanent magnet is placed in a coil of wire, If there is no electric current in the wire so, option B is correct.

Electric current is a term used to describe how much electricity flows across a circuit and how it flows in an electronic circuit. Amperes are used to measure it (A). The more electricity flowing across the circuit, the higher the ampere value.

When current flows through a coil of wire, it transforms into an electromagnet. The coil spins as a result of the electromagnet's interaction with a permanent magnet.

An electromagnet is created when current passes through a coil of wire. Because of the electromagnet's interaction with a permanent magnet, the coil spins.

Thus, The magnet is not moving relative to the wire.

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Answer:

Hope I can help you.

Explanation:

Here u go here are some that you can choose from! :)

1) Air bags are activated by a chemical reaction inside the bag. A sensor turns on an electrical circuit, and then sodium azide is ignited. The reaction that occurs generates nitrogen gas, which fills the bag at an extremely rapid rate.

2) Baking soda and vinegar produce carbon dioxide gas when mixed. As this gas grows in volume, it puts pressure on whatever container it is in, and will erupt out of an opening in the container, creating a volcano effect. This chemical reaction is safe, making it a great science activity for kids.

3) Batteries have two terminals: the anode and the cathode. They're separated by an electrolyte, a chemical that allows the anode and cathode to transmit a charge. When something's connected to a battery, chemical reactions take place along the electrodes to produce electricity. Of course, you can't see the energy in the battery when the battery is just sitting around; it is when the electricity is produced that the energy is seen.

4) Explosives: when an explosive goes off, chemical energy that was stored in it is changed and transferred into sound energy, kinetic energy, and thermal energy. Just because chemical energy is being released, it doesn't mean an explosion will occur. But, when a solid material quickly changes into a hot, expanding gas, you may be looking at an explosion. Take TNT, for example. Two units of solid TNT can instantly change into 15 units of hot gas, creating a dark and sooty explosion.

5) Food: chemical energy in food is released when the food is digested and the molecules of food are broken down into smaller pieces. Our bodies digest food by mixing it with acids and enzymes in the stomach. This process turns carbohydrates into glucose. The stomach (and small intestine) then release that glucose into the bloodstream, serving as energy for our bodies.

6) Heating packs (used to warm up cold hands or soothe sore muscles) have chemicals inside them. A lot of them function by "cracking" (or bending) them. This is because they're filled with iron. Once you crack the heating pack, the iron is exposed to the air. As the iron reacts to the oxygen, it transforms into iron oxide, a chemical that can produce heat.

7) Wood, when dry, stores chemical energy. This chemical energy is released as the wood burns, and it is converted into heat, or thermal energy. This also produces light energy. As a result of burning, the wood turns into an entirely new substance - ashes.

A. Assume incompressible flow

Since volumtric flow rate will be same in both section

Q1 = Q2

A1*V1 = A2*V2

V2 = A1*V1/A2

V2 = 6.9*10^-4*288*10^-2/(3.3*10^-4)

V2 = 6.02 m/sec

B. using bernoulli's equation:

P1/rho + v1^2/2 + g*h1 = P2/rho + v2^2/2 + g*h2

Since pipes are horizontal

h1 = h2

P1/rho + v1^2/2 = P2/rho + v2^2/2

P2 = P1 + (v1^2 - v2^2)*rho/2

P2 = 1.5*10^5 + (2.88^2 - 6.02^2)*1100/2

P2 = 1.35*10^5 Pa

The rate of change in position of an object in any course. Speed is measured because the ratio of distance to the time wherein the distance became included. Speed is a scalar amount because it has handiest route and no significance.

Velocity can be notion of as the rate at which an object covers distance. A quick-moving object has a high speed and covers a notably big distance in a given amount of time, whilst a sluggish-shifting item covers a relatively small amount of distance in the same amount of time.

The primary unit or the S.I. unit of velocity is m/s or ms?¹.

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Answer:

1323

Explanation:

we know ,

weight = m*g

= 135 * 9.8 ( acceleration due to gravity in earth is 9.8 m/S2)

= 1323 N

Label the rows as the electron energy levels:

The rows of the periodic table are also known as periods. There are seven periods, and each period corresponds to a particular energy level. You can label them from 1 to 7, starting from the top row.

Label the number of valence electrons in Columns 1, 2, and 13-18:

Columns 1 and 2 are the s-block elements, and they have 1 and 2 valence electrons, respectively. Columns 13-18 are the p-block elements, and they have 3 to 8 valence electrons, respectively. You can label the number of valence electrons in each column.

Label the metals, semi-metals, and non-metals using different colors:

Metals are on the left side of the periodic table, semi-metals are in the middle, and non-metals are on the right side. You can use different colors to label them without obscuring any of the information about different elements.

Label the ion charges for elements in the first 3 rows:

Elements in the first 3 rows of the periodic table have predictable ion charges. The alkali metals (Group 1) have a charge of +1, the alkaline earth metals (Group 2) have a charge of +2, and the elements in Group 13 have a charge of +3. For Groups 15, 16, and 17, the charges are -3, -2, and -1, respectively. The noble gases (Group 18) are unreactive and do not form ions. You can write these charges for each element in their respective positions.

Label the trends for atomic size, ionization energy, and electron affinity:

Atomic size generally decreases from left to right across a period and increases from top to bottom within a group. Ionization energy generally increases from left to right across a period and increases from bottom to top within a group. Electron affinity generally increases from left to right across a period and becomes less negative from top to bottom within a group. You can label these trends on your periodic table as well.

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The centripetal acceleration = 236.63 m/s²

The force = 17.98 N

Given

mass = 76 g = 0.076 kg

r = 1.5 m

f = 2 rps = 2 rotation per second

Required

The centripetal acceleration

The Force tension

Solution

Centripetal force is a force acting on objects that move in a circle in the direction toward the center of the circle  

\(\large {\boxed {\bold {F = \frac {mv ^ 2} {R}}}\)

F = centripetal force, N  

m = mass, Kg  

v = linear velocity, m / s  

r = radius, m  

The speed that is in the direction of the circle is called linear velocity  

Can be formulated:  

\(\tt \displaysyle v = 2 \pi.r.f\)

r = circle radius  

f = rotation per second (RPS)  

The linear velocity : 2 x 3.14 x 1.5 x 2 =18.84 m/s

The centripetal acceleration : ac = v²/R = 236.63 m/s²

The force : F = m x ac = 0.076 x 236.63 = 17.98 N