15) A body is released from a height or from the ground, where it has potential energy 100). (Air resistance is negligible). Which of the following statements is true and which is false? a) The potential energy of the body, when it reaches the ground is equal to 100j b) The kinetic energy of the body, in the middle of the path is equal to 100j c) The mechanical energy of the body, just before it reaches the ground is equal to 100j 8 ) The potential energy of the body, in the middle of the path is equal to 100j e) The kinetic energy of the body, when it reaches the ground is equal to 100j​

Answer:

\(E_2=80N/C\)

Explanation:

From the question we are told that:

Initial Distance \(d_1=40cm=>0.4m\)

Initial Electric field strength \(E_1=100N/C\)

Final Distance \(d_2=20cm=>0.20m\)

Generally the equation for Electric field is mathematically given by.

 \(E=\frac{kq}{d^2}\)

 \(q=\frac{100*(0.4)^2}{K}\)

Substituting q for \(d=20cm\)

 \(E_2=\frac{k}{0.2}*\frac{100*(0.4)^2}{K}\)

 \(E_2=80N/C\)

Answer:

Explanation:

Set specific, achievable goals: Break down your larger goal into smaller, more manageable targets that you can work towards each day. When you accomplish these smaller goals, it will give you a sense of accomplishment and motivation to continue working towards your larger goal.

Visualize your success: Imagine yourself successfully achieving your goal and all of the positive feelings that come along with it. This visualization can help keep you focused and motivated when distractions arise.

Find an accountability partner: Find someone who shares your goals and who can help you stay focused and motivated. This could be a friend, family member, or a coach. Having someone to share your progress with and to hold you accountable can be a powerful motivator.

Reward yourself: Set up a system of rewards for yourself when you reach certain milestones on the way to your goal. These rewards could be something as simple as a treat or a movie, or something more substantial like a new piece of workout equipment.

Get organized: Plan out your workouts and stick to a routine. Having a clear plan and structure can help you stay focused and motivated, as you can see how each workout is helping you to reach your goal.

Surround yourself with positive influences: Surround yourself with people who support and encourage your goals. Having positive influences in your life can help you stay motivated and inspired to reach your goals.

A ring galaxy such as Hoag's Object that is the result of a collision would be classified as a e. peculiar galaxy.

A peculiar galaxy is a type of galaxy that does not fit into any of the traditional classifications. Peculiar galaxies can have a variety of different shapes and sizes, and they are often the result of collisions or mergers between galaxies.

Hoag's Object is a ring galaxy, which means that it has a ring of stars and gas surrounding a central nucleus. The ring is thought to have formed when a smaller galaxy collided with Hoag's Object and was absorbed.

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The magnitude of the kinetic frictional force acting on the box is approximately 9.8 N.

To calculate the magnitude of the kinetic frictional force, we can use the formula:

Frictional force = coefficient of kinetic friction * normal force,

where the normal force is equal to the weight of the box.

The weight of the box can be calculated using the formula:

Weight = mass * gravitational acceleration,

where the gravitational acceleration is approximately \(9.8 m/s^2\).

Substituting the given values, we have:

Weight = 5 kg * \(9.8 m/s^2\) = 49 N.

Now we can calculate the magnitude of the kinetic frictional force:

Frictional force = 0.2 * 49 N = 9.8 N.

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--The complete Question is, A box is being pulled to the right with a force of 100 N. The box experiences a kinetic frictional force. The mass of the box is 5 kg and the coefficient of kinetic friction between the box and the surface is 0.2. What is the magnitude of the kinetic frictional force acting on the box? --

F3 is the greatest of all forces , hence 3rd case in which masses were 200kg and 150 kg separated with a distance of 10 will have greatest force of all

The force of attraction between any two bodies is directly proportional to the product of their masses and is inversely proportional to the square of the distance between them is called gravitation force of attraction

gravitation force = Gm1 m2 / \(r^{2}\)

G = gravitational constant

m1 = mass of one object

m2 = mass of other object

r = distance between them

case 1

F1 = G (50) (100) / \(20^{2}\) = 12.5 G

F2 = G (50) (10) / \(10^{2}\)  = 5 G

F3 = G (200) (150) / \(10^{2}\) = 300 G

F4 =  G (200) (150) / \(30^{2}\) = 33.33 G

F3 is the greatest of all forces , hence 3rd case in which masses were 200kg and 150 kg separated with a distance of 10 will have greatest force of all

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Answer:

450N

Explanation:

Given data

Mass m= 75kg

Acceleration= 6m/s^2

From the Newtons first law, F=ma

substitute

F=75*6

F= 450N

Hence the force is 450N

Answer:

lathe

perfectly symmetrical

Answer: A lathe is used to turn wood . It rotates and carves wood to produce a perfectly symmetrical form .

First one is lathe .

Second one is perfectly symmetrical .

Explanation: I just took the test on Plato and had 100%

Answer:

Moderate temperatures

Explanation:

Water came before life and tides. Gravity is irrelevant.

Answer:

Velocity is quickness of motion or action. A synonym is celerity; a simpler word is speed. In physics, velocity specifically refers to the measurement of the rate and direction of change in position of an object.pls pls mark me branilest

Answer:

Velocity is defined as displacement travelled per unit time in a fixed direction. It is a vector quantity as it has both magnitude and fixed direction.

Please mark me brainliest.

Lithium fluoride will be most soluble in water because it is most strongly ionic.

Solubility is the amount of a substance that dissolves in a given volume of solvent at a particular temperature.

Solubility is affected by:

Water is a polar molecule.

Lithium fluoride will be most soluble in water because it is most strongly ionic.

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The required volume of the gas when pressure remains constant is calculated to be 1029.65 ml.

Charles law gives the relation between temperature and volume when the pressure of the gas is kept constant.

Mathematically, it is given as,

V₁/T₁ = V₂/T₂

It is given that the sample of argon gas occupies 950 mL at 25°C.

So, V₁ = 950 ml

T₁ = 25°C = 25 + 273.15 = 298.15 K

The volume of the gas occupied at 50°C is to be found out.

V₂ = ?

T₂ = 50°C = 50 + 273.15 = 323.15 K

Placing all the values in the above equation, we have,

V₁/T₁ = V₂/T₂

950/298.15 = V₂/ 323.15

V₂ = 950/298.15 × 323.15 = 1029.65 ml

Thus, the required volume is calculated to be 1029.65 ml.

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(a) 17.5 cm. The image is formed on the same side of the lens as the object. (b)  -0.648. (c) real, inverted, and reduced in size. (d) -5.28 cm (e) real, inverted, and reduced image (f) 0.361 cm (g)  -0.068 (h)  0.044 (i) real, upright, and greatly reduced in size.

(a) The position of the image created by lens 1 can be found using the thin lens equation: 1/f = 1/do,1 + 1/di,1, where f is the focal length of lens 1 and do,1 is the object distance. Substituting the given values, we get: 1/8.8 = 1/27 + 1/di,1. Solving for di,1, we get di,1 = 17.5 cm. The negative sign indicates that the image is formed on the same side of the lens as the object.

(b) The magnification of lens 1 is given by M1 = -di,1/do,1, where the negative sign indicates that the image is inverted. Substituting the values, we get: M1 = -0.648.

(c) The image created by lens 1 is real, inverted, and reduced in size.

(d) The object distance for lens 2 can be found using the formula: 1/do,2 = 1/di,1 - 1/f1. Substituting the values, we get: 1/do,2 = 1/0.175 - 1/0.088. Solving for do,2, we get do,2 = -5.28 cm. The negative sign indicates that the object is to the left of lens 2.

(e) The object for lens 2 is a real, inverted, and reduced image formed by lens 1.

(f) The position of the final image can be found using the thin lens equation: 1/f2 = 1/di,2 + 1/do,2, where f2 is the focal length of lens 2 and di,2 is the image distance. Substituting the values, we get: 1/11 = 1/di,2 - 1/0.053. Solving for di,2, we get di,2 = 0.361 cm. The positive sign indicates that the image is formed on the opposite side of the lens as the object.

(g) The magnification of lens 2 is given by M2 = -di,2/do,2, where the negative sign indicates that the image is inverted. Substituting the values, we get: M2 = -0.068.

(h) The net magnification of the two-lens system is given by Mnet = M1*M2. Substituting the values, we get: Mnet = 0.044. The positive sign indicates that the final image is upright.

(i) The final image formed by the two-lens system is real, upright, and greatly reduced in size.

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When direct current flows through an electrical coil, it generates a magnetic field.

If the direct current flowing through the coil is increasing, the magnetic field strength will also increase.

This, in turn, will cause the coil to generate a stronger electromagnetic force, which can be used for various purposes such as powering motors, generating electricity, and more.

However, if the current flow becomes too strong, it can cause the coil to overheat and potentially damage it.

Therefore, it's important to ensure that the coil is designed to handle the amount of current flowing through it to prevent any potential damage.

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Answer:

\(V=1.76\times 10^{-4}\ V\)

Explanation:

Given that,

The diameter of a wire, d = 1.628 mm

Radius, r = 0.814  mm = 0.000814m

Current, I = 12.5 mA

The length of the wire, l = 2m

The resistivity of the wire, \(\rho=1.47\times 10^{-8}\ \Omega-m\)

We need to find the potential difference across the wire. We know that the resistance of the wire is given by :

\(R=\rho\dfrac{l}{A}\)

Also, V = IR

\(\dfrac{V}{I}=\rho\dfrac{l}{A}\\\\V=\dfrac{\rho l I}{A}\\\\V=\dfrac{1.47\times 10^{-8}\times 2\times 12.5\times 10^{-3}}{\pi \times (0.000814)^2}\\\\V=1.76\times 10^{-4}\ V\)

So, the potential difference of the wire is \(1.76\times 10^{-4}\ V\).

The formula \(Ts = (tm^2 / rm^3)^(1/2) * (rm / 4)^(3/2)\) if an artificial satellite has been put into circular orbit about the earth, at a distance from the center of the earth equal to 1/4 the distance from the earth's center.

To find the period of the satellite, we can use Kepler's Third Law of Planetary Motion, which states that the square of the period of a planet or satellite is proportional to the cube of its average distance from the center of the planet or central body. Mathematically, this can be expressed as:

\(T^2 = k * r^3\)

where T is the period, r is the average distance from the center of the planet or central body, and k is a constant of proportionality.

Since we know the period of the moon (tm), we can find the constant of proportionality for the moon's orbit. Assuming the moon's orbit is circular, we have:

\(tm^2 = k * rm^3\)

where rm is the average distance from the center of the earth to the moon's center.

Using this relationship, we can find k:

\(k = tm^2 / rm^3\)

Next, we can use k to find the period of the satellite, given that the average distance from the center of the earth to the satellite is 1/4 the distance from the center of the earth to the moon's center

\(rs = rm / 4\)

So the period of the satellite, Ts, is:

\(Ts^2 = k * rs^3\)

\(Ts^2 = (tm^2 / rm^3) * (rm / 4)^3\)

\(Ts = (tm^2 / rm^3)^(1/2) * (rm / 4)^(3/2)\)

So the period of the satellite in terms of the moon's period (tm) is given by the formula:

\(Ts = (tm^2 / rm^3)^(1/2) * (rm / 4)^(3/2)\)

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All of these devices can be used to separate the different wavelengths emitted by the light source.

Wavelength is a term used to describe the distance between two successive crests or troughs of a wave. It is a measure of a wave's frequency, where shorter wavelengths have a higher frequency and longer wavelengths have a lower frequency. Wavelengths can be measured in a variety of units, including meters, centimeters, and nanometers. Wavelengths are an important factor in determining the properties of a wave, including its speed, amplitude, and frequency. Wavelengths also play a role in the behavior of light, sound, and other forms of energy.

A reflection grating is a device that uses a series of closely spaced, parallel lines to diffract light into its component colors; a transmission grating is similar but uses closely spaced, parallel lines etched on a thin sheet of glass; and a prism can be used to separate light into its component colors by refraction.

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In real gases, molecular size causes positive deviations from the ideal gas behavior, as molecules have finite volumes and experience attractive forces, leading to a larger observed pressure than predicted by the ideal gas law.

In real gases, molecular size can cause positive deviations from the ideal gas behavior predicted by the PV/RT ratio. The ideal gas law assumes that gas molecules are point masses with no volume and that intermolecular forces are negligible. However, in reality, gas molecules have finite volumes and experience attractive forces between them.

When the molecular size becomes significant compared to the average distance between molecules, the gas molecules occupy a larger volume than predicted by the ideal gas law. This results in a higher observed pressure than expected at a given temperature and volume, leading to positive deviations.

The increased molecular volume leads to more frequent molecular collisions and greater intermolecular interactions. These interactions cause the gas molecules to deviate from ideal behavior by exerting additional attractive forces between them.

As a result, more energy is required to separate the molecules and maintain the same pressure as an ideal gas, leading to a positive deviation from the ideal gas law.

Examples of gases that exhibit positive deviations from the ideal gas behavior due to molecular size include ammonia and carbon dioxide at high pressures. These deviations are important to consider in various industrial processes, such as the design and operation of chemical reactors and the liquefaction of gases.

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Answer:

Explanation:

M =W/g

M = 25 N/9.8m/s²

M = 2.6 kg

Answer:

A

Explanation:

The kinetic energy decreases to half its original value.

The best answer ""The planets and sun all formed from a cloud of gas and dust that contracted as it cooled. As the cloud contracted, its spin increased and it flattened. By the time the planets formed, the cloud was a flat spinning disk.""

This explanation is based on the widely accepted theory of solar system formation called the nebular hypothesis. According to this hypothesis, the solar system formed from a rotating cloud of gas and dust known as the solar nebula. As the nebula contracted due to its own gravity, it began to spin faster and flatten into a spinning disk.

Because the initial cloud had a particular rotation and flattened shape, the resulting planetary system inherited these characteristics. The conservation of angular momentum caused the protoplanetary disk to form a nearly flat plane, and the counterclockwise direction of rotation was also preserved. This is why the planets have orbits in the same plane and in the same counterclockwise direction when viewed from above the Earth's North Pole.

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Yes, your data supports the manufacturer's claims. The manufacturer states the resistor has a value of 100 Ohms with a 5% tolerance. This means the actual resistance can vary between 95 Ohms (100 - 5) and 105 Ohms (100 + 5).

If the temperature and other physical parameters of the wire, such as stresses and strains, stay unchanged, the current flowing through the wire is precisely proportional to the potential difference applied across its ends.

In an electrical circuit with just passive components, the relationship between voltage, resistance, and current is described by Ohm's law as follows:

V=RI

where

V is the voltage that the battery provides.

R is the circuit's resistance.

Electrified heaters. Around the world, electric heaters are a typical wintertime device.

Irons and kettles with electricity. There are numerous resistors within the electric kettle and irons.

We can see from the equation that the voltage, V, and the circuit's current, I, are directly inversely proportional.

Your calculated value of 108 ± 2 Ohms falls within this range, as the lower limit is 106 Ohms (108 - 2) and the upper limit is 110 Ohms (108 + 2).

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a) The angular velocity of the rod as it passes through a vertical position is \(\frac{3g}{2l} ^{0.5}\) and the corresponding reaction at the pivot is 2w/3.

b) For a weight of 1.8 lb and length of 3 ft, the angular velocity of the rod as it passes through a vertical position is 2.12 rad/s and the corresponding reaction at the pivot is 1.2 lb.

a) When the rod is released from rest in a horizontal position, it swings freely due to the gravitational force acting on it. As it swings, the potential energy is converted into kinetic energy, and the angular velocity of the rod increases. When the rod passes through a vertical position, all of its potential energy is converted into kinetic energy. Therefore, the angular velocity of the rod at this position can be determined using the conservation of energy principle. This yields the formula \((1/2)Iω^2 = mgh\), where I is the moment of inertia of the rod, ω is the angular velocity, m is the mass of the rod, g is the acceleration due to gravity, and h is the height of the rod above its initial position. Solving this equation for ω, we get\(\omega = \frac{3g}{2l} ^{0.5}\). The corresponding reaction at the pivot can be found using the equation Στ = Iα, where τ is the torque, I is the moment of inertia, and α is the angular acceleration. Since the rod is released from rest, \(\alpha = \frac{\omega^2}{2l}\), and therefore, Στ \(= (1/3)ml^2\alpha\). Substituting the values and simplifying, we get the reaction at the pivot to be 2w/3.

b) For a weight of 1.8 lb and length of 3 ft, the mass of the rod can be determined as \(m = \frac{w}{g} =\frac{1.8}{32.2} = 0.056 lb-s^2/ft\). The moment of inertia of the rod can be calculated using the formula \(I = \frac{1}{3} ml^2 = 0.002 lb-ft^2\). Substituting these values into the formula for ω, we get \(\omega= (3g/2l)^{0.5} = 2.12 rad/s\). The corresponding reaction at the pivot can be found using the equation Στ = Iα, where \(\alpha = \omega^2/2l = 0.238 rad/s^2\). Substituting the values, we get the reaction at the pivot to be 1.2 lb.

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Answer:

True! UwU

Explanation:

the magnetic field is strongest near to the poles of the magnet were the lines of flux are more closely spaced.

The graph in which the block will travel with the greatest speed is the graph with the greatest displacement at given equal forces.

Based on the principle of work energy theorem, the work done in moving the block against the frictionless floor is equal to the kinetic energy.  

K.E = ¹/₂kx²

K.E = ¹/₂Fd

¹/₂mv² = ¹/₂Fd

mv² = Fd

v² = Fd/m

v = √ (Fd/m)

Thus, the graph in which the block will travel with the greatest speed is the graph with the greatest displacement at given equal forces.

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Explanation:

list in order with the smallest molecules at the top and largest molecules at the bottom:

1.Oxygen

2.Water

3.Carbon dioxide

4.amino acid

5.Glucose

6. Starch

7. Protein

The molecules can be arranged as follows with the smallest at the top is oxygen, water, carbon dioxide, amino acid, glucose, starch, protein.

The given molecules;

starch, water, glucose, carbon dioxide, protein, amino acid, oxygen

The molecular weight of the given compounds is listed as follows;

water -------- 18 g/mol

glucose -------  180.2 g/mol

starch (2 or more glucose) ------ 360 g/mol

carbon dioxide ------ 44 g/mol

protein -------- 20,000 g/mol

amino acid (glycine) ----- 75 g/mol

oxygen -------- 16 g/mol

Thus, the molecules can be arranged as follows with the smallest at the top;

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