liquid can flow but solid cannot give reason ​

Answer:

a

Explanation:

Answer:

\( \boxed{\sf Work \ done = 4 \ J} \)

Given:

Force = 8 N

Distance covered by the body = 50 cm = 0.5 m

Explanation:

Work Done = Force × Distance covered by the body

= 8 × 0.5

= 4 J

Answer: 1.232

Explanation:I remember having this as a hw and this was the answer correct me if I was wrong

From Hooke's law, the length of the spring after extension and after the mass is attached is 1.788 meters. Option B is the answer.

Hooke's law state that in an elastic material, the force applied is directly proportional to the extension provided that the elastic limit is not exceeded.

Given that a 12.0 kg mass is attached to 1.2 m long spring with a spring constant of 200.0 N/m.

The given parameters are:

According to Hooke's law

F = Ke

But F = mg

mg = Ke

Substitute all the parameters into the formula to get extension e

12 x 9.8 = 200e

e = 117.6 / 200

e = 0.588 m

The length of the spring after extension and after the mass is attached will be

\(L_{2}\) = \(L_{1}\) + e

\(L_{2}\) = 1.2 + 0.588

\(L_{2}\) = 1.788 m

Therefore, the correct answer is option B because the length of the spring after extension and after the mass is attached is 1.788 meters.

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Answer:

32.0 Ω

Explanation:

Ohm's law:

V = IR

128 V = (4.00 A) R

R = 32.0 Ω

If 128 volts are required to push 4.00 A of current through a resistor, then the resistance of the resistor is 32 ohms, and Ohm's Law is used to solve for the resistance of the resistor.

Ohm's Law is a fundamental law of electricity that relates the three basic electrical quantities of voltage, current, and resistance, and states that the current flowing through a conductor is directly proportional to the voltage applied across it and is calculated below,

Ohm's Law is used to solve for the resistance of the resistor

Ohm's Law: V = IR

(Here, V =the voltage (in volts), I =the current (in amperes), and R =the resistance (in ohms) )

Given , 128 V is required to push 4.00 A of current through the resistor, one can substitute these values into Ohm's Law and R is solved,

R = V/I

R = 128 V / 4.00 A

R = 32 Ω

Hence, if 128 volts are required to push 4.00 A of current through a resistor, then the resistance of the resistor is 32 ohms.

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The density of the liquid is 0.5 g/cm³. to calculate the density, we use the formula: density = mass/volume.

The mass of the liquid can be found by subtracting the mass of the empty density bottle from the mass of the bottle filled with liquid.

For water: mass of liquid = 70g - 20g = 50g.

For the second liquid: mass of liquid = 55g - 20g = 35g.

Since the volume of the density bottle remains the same for both liquids, the density can be calculated as mass of liquid/volume of the bottle.

For water: density = 50g/100cm³ = 0.5 g/cm³.

For the second liquid: density = 35g/100cm³ = 0.35 g/cm³.

Therefore, the density of the liquid is 0.5 g/cm³.

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Answer:

Well if they playing a game like that

The minimum velocity vo required for the bob to swing through a complete circle is:

\(vo = \sqrt\frac{(m1v02 + m2v02 - m2g2l2)}{m1}\)

Using conservation of energy, we can solve for the minimum velocity required for the bob to swing through a complete circle.

The total initial energy of the system is:

\(Ei =\frac{1}{2} m1v02 +\frac{1}{2} m2v02\)

The total final energy of the system is:

\(Ef = \frac{1}{2} m2vf2 + mg2l2\)

where vf is the velocity of the bob after the collision and g is the gravitational acceleration.

Equating the initial and final energy, we have:

\(\frac{1}{2}m1v02 +\frac{1}{2} m2v02 =\frac{1}{2}m2vf2 + mg2l2\)

Solving for vf, we have:

\(vf = \sqrt{} \frac{(m1v02 + m2v02)}{m2 - g2l2}\)

The minimum velocity required for the bob to swing through a complete circle is given by the expression:

\(vo = \sqrt \frac{(m2vf2 + mg2l2)}{m1}\)

Substituting the expression for vf, we have:

\(vo = \sqrt{ \frac{(\frac{m2(m1v02 + m2v02)}{m2 - g2l2})}{m1}\)

\(vo = \sqrt\frac {(m1v02 + m2v02 - m2g2l2)}{m1}\)

Therefore, the minimum velocity vo required for the bob to swing through a complete circle is:

\(vo = \sqrt\frac{(m1v02 + m2v02 - m2g2l2)}{m1}\)

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This is because the cloth soaked in water can absorb and evaporate the heat from your forehead.

This technique is used to cool down your fever, and to help you feel better.

The presence of a keeper alters the magnetic field of a horseshoe magnet by providing a closed magnetic circuit, enhancing the magnet's strength and efficiency.

A horseshoe magnet consists of a U-shaped magnet with a North and South pole at its ends. The magnetic field lines of the magnet extend from one pole to the other, creating a loop. However, when the magnet is not in use, the magnetic field lines tend to spread out and weaken.

To prevent this dispersion and maximize the magnet's strength, a keeper is used. The keeper is a ferromagnetic material, such as iron or steel, that is placed across the open ends of the horseshoe magnet. By doing so, the keeper forms a closed magnetic circuit, allowing the magnetic field lines to flow through the keeper, effectively closing the loop.

This closed circuit prevents the magnetic field lines from spreading out and improves the magnet's efficiency. The presence of the keeper also enhances the magnet's overall magnetic strength, as the magnetic field is concentrated within the closed circuit, leading to a stronger magnetic force at the poles.

Thus, the keeper alters the magnetic field of the horseshoe magnet by providing a closed path for the magnetic field lines, increasing its efficiency and strength.

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The total travelled distance is • Speed, time and distance is one of the most common and important topics in the Mathematics or Quant section.

Velocity is the pace and direction of an object's movement, whereas speed is the time rate at which an object is travelling along a path. In other words, velocity is a vector, whereas speed is a scalar value.

For instance, 50 km/hr west denotes the velocity of a car whereas 50 km/hr (31 mph) denotes the speed at which it is moving down a route.

The average speed of an object is determined by dividing the distance traveled by the amount of time it takes the object to reach the distance.

Therefore, The total travelled distance is • Speed, time and distance is one of the most common and important topics in the Mathematics or Quant section.

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\(▪▪▪▪▪▪▪▪▪▪▪▪▪  {\huge\mathfrak{Answer}}▪▪▪▪▪▪▪▪▪▪▪▪▪▪\)

Given terms :

As we know, Distance covered is equal to :

The sartorius muscle is the solution. A superficial muscle that runs the full length of the leg, the sartorius is involved in the flexion of the knee and hip.

The heart's wall is made up of cardiac muscle, which also causes the heart to contract vigorously. Intestinal, uterine, blood vessel, and internal ocular muscles are all made of smooth muscles.

The epidermis and some skeletal muscles are linked to the bones (muscles in our face). The skeletal muscles' contraction aids in the movement of the limbs and other bodily parts.

Although some estimates go as high as 840, the majority of sources claim that there are over 650 identified skeletal muscles in the human body.

Therefore, The sartorius muscle is the solution. A superficial muscle that runs the full length of the leg, the sartorius is involved in the flexion of the knee and hip.

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The truck pushes the sound waves together so that the sound wavelengths in front of the truck get shorter. This causes the frequency to increase, which increases the pitch.

The number of waves that pass a specific place in a given length of time is known as wave frequency. Hertz (Hz) is the SI unit for wave frequency,

A higher-frequency wave with the same amplitude has more energy than a lower-frequency wave.

The truck pushes the sound waves together so that the sound wavelengths in front of the truck get shorter. This causes the frequency to increase, which increases the pitch.

Frequency is directly propotional to the pitch. Option A is correct.

Hence this causes the frequency to increase, which increases the pitch.

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Answer:

B

Explanation:

cold condenses and makes the balloon smaller

The percentage of the total power developed in the circuit that is delivered to the load resistance (ro) when ro is set for maximum power transfer is 50%.

What is Circuit?

A circuit is a closed loop or path through which an electric current flows. It is made up of various components, such as resistors, capacitors, inductors, diodes, transistors, and switches, connected together in a particular arrangement to perform a specific function, such as amplification, switching, or signal filtering. The two types of circuits are AC (alternating current) and DC (direct current) circuits, which differ in their power sources and voltage waveforms.

The percentage of the total power developed in the circuit that is delivered to the load resistance (ro) when ro is set for maximum power transfer is 50%. This occurs when the load resistance is equal to the internal resistance of the source, and in this case, half of the total power generated is transferred to the load resistance while the other half is dissipated as heat in the internal resistance of the source.

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When a person comes into contact with electricity, the severity of the shock can be affected by whether they are wet or dry.

If a person is wet, the water on their skin can conduct electricity and allow it to pass through their body more easily, increasing the severity of the shock.

On the other hand, if a person is dry, the resistance to the flow of electricity is higher, reducing the severity of the shock.

In the case of a 120 V electrical shock, the severity of the shock can vary depending on the conditions.

It is important to note that any electric shock can be dangerous and potentially life-threatening, regardless of whether a person is wet or dry.

If someone comes into contact with electricity, it is crucial to seek medical attention immediately.

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Given :

Mass of object, m = 1.5 kg.

To Find :

The momentum of boulder dropped from a cliff after 3 seconds.

Solution :

Speed of boulder after 3 seconds of free fall is given by :

v = u + gt       ( Equation of motion )

v = 0 + 10×3    ( g = acceleration due to gravity )

v = 30 m/s

Now, momentum is given by :

P = m × v

P = 1.5 kg × 30 m/s

P = 45 kg m/s

Therefore, momentum of boulder is 45 kg m/s.

Answer:

a) Stone            v_{y} = - 7.25 ft / s ,  vₓ = 0.362 ft / s

b) tennis ball    v_{y} =  -3.16 ft / s ,   vₓ = 0.634 ft / s

c) golf ball        v_{y} = - 1,536 ft / s, vx = 0.634 ft / s

2) golf ball

Explanation:

1) The average speed is defined with the displacement interval in the given time interval

           v =( \(x_{f}\)-x₀) / Δt

let's use this expression for each object

a) Stone

  It tells us that it is released from y₀ = 10 ft and reaches the floor at

t = 0.788 s, but in the problem they tell us that the calculation is for t = 1.38 s

           \(v_{y}\) = (0-10) / 1.38

           v_{y} = - 7.25 ft / s

 in this interval a distance of x_{f} = 0.500 ft was moved away from the building (x₀ = 0 ft)

          vₓ = (0.500- 0) / 1.38

          vₓ = 0.362 ft / s

In my opinion it makes no sense to keep measuring the time after the stone has stopped.

b) tennis ball

It leaves the building at a height of y₀= 10ft and at the end of the period it is at a height of y_{f} = 5.63 ft, all this in a time of t = 0.788 + 0.591 = 1.38 s

the average vertical speed is

            \(v_{y}\) = (5.63 - 10) / 1.38

            v_{y} = -3.16 ft / s

for horizontal velocity the ball leaves the building xo = 0 reaches the floor

x₁ = 0.500 foot and when bouncing it travels x₂ = 0.375 foot, therefore the distance traveled

         x_{f} = x₁ + x₂

         x_{f} = 0.500 + 0.375

         x_{f} = 0.875 ft

we calculate

         vₓ = (0.875 - 0) / 1.38

         vₓ = 0.634 ft / s

c) The golf ball

the vertical displacement y₀ = 10 ft, and y_{f} = 7.88 ft

          v_{y} = (7.88 - 10) / 1.38

          v_{y} = - 1,536 ft / s

the horizontal displacement x₀ = 0 ft to the point xf = 0.875 ft

          vₓ = (0.875 -0) / 1.38

          vₓ = 0.634 ft / s

2) in this part we are asked for the instantaneous speed at the end of the time interval

a) the stone is stopped so its speed is zero

          v_{y} = vₓ = 0

b) the tennis ball

It is at its maximum height so its vertical speed is zero

        v_{y} = 0

horizontal speed does not change

          vₓ = 0.634 ft / s

c) The golf ball

they do not indicate that it is still rising. Therefore its vertical speed is greater than zero

         v_{y} > 0

horizontal speed is constant

         vₓx = 0.634 ft / s

the total velocity of the object can be found with the Pythagorean theorem

         v = √ (vₓ² + v_{y}²)

When reviewing the results, the golf ball is the one with the highest instantaneous speed at the end of the period

In the shells of the atom, we find the electrons while in the nucleus of the atom, we find the protons.

We define the electron as the smallest part of a substance that is able to take part in a chemical reaction. Thus the atoms of elements are quite different from each other but there are some of the feature of the atom that is general to all the atoms.

The atoms are made up of the sub atomic particles such as the electrons, the protons and the neutrons. Now we know that the protons and the protons can be found in the nucleus of the atom while the electrons are in the shells.

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A rock sample contains 1/4 of the radioactive isotope u-235 and 3/4 of its daughter isotope pb-207. if the half-life of this decay is 700 million years, this rock is approximately 2.1 billion years old.

Radioactive decay of Uranium-235 to Lead-207 follows a first-order rate law with a half-life of 700 million years. This means that 50% of Uranium-235 will decay to Lead-207 in 700 million years, and another 50% of the remaining Uranium-235 will decay to Lead-207 after another 700 million years. Since the rock sample contains 1/4 Uranium-235 and 3/4 Lead-207, we can assume that the original sample contained only Uranium-235 and that all of its decay products (including Lead-207) are still present.

This means that the original sample contained 4 parts Uranium-235 to 0 parts Lead-207, and that 1 part Uranium-235 remains for every 3 parts Lead-207 (since 1/4 of the original 4 parts Uranium-235 has decayed to Lead-207).

Thus, we can set up an equation where 1/2 of the remaining Uranium-235 will decay to Lead-207 after some time t:1/4 x 1/2^(t/700 million years) = 3/4

Simplifying this equation, we get:1/2^(t/700 million years) = 3t/700 million years = 2.1 billion years

Therefore, the rock sample is approximately 2.1 billion years old.

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Newton's first and second laws of motion both do, but I think the one you're looking for is: The First Law of Motion.  That description is a little more direct.

It says that if an object is not acted on by a net external force, then it continues in "constant, uniform motion".

Answer:

I am happy with you the father said to his daughter

While a rock thrown upward at 50 degrees to the horizontal rises, neglecting air drag, its horizontal component of velocity remains unchanged.

The horizontal component of velocity refers to the velocity in the horizontal direction, which is perpendicular to the vertical direction of the rock's motion. Neglecting air drag means that no external force acts on the horizontal component of velocity. According to Newton's first law of motion, an object in motion will continue to move at a constant velocity in the absence of external forces.

In this case, as the rock rises vertically, its horizontal component of velocity remains unaffected by the vertical motion. The force of gravity acts vertically downward and does not affect the horizontal motion of the rock. Therefore, the horizontal component of velocity remains unchanged throughout the rock's upward trajectory.

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Answer:

rubber

Explanation: because its the only insulator

The requried combined length of the trains are 1.8 kilometers.

Velocity is defined as the rate of change in the position of an object with respect to time.

Here,

Let's first convert the speeds from km/h to m/s to make our calculations easier,

The first train travels at 108 km/h = 30 m/s.

The second train travels at 72 km/h = 20 m/s.

Now, we can calculate the relative speed of the trains:

The relative speed between the two trains is 30 m/s - 20 m/s = 10 m/s.

We know that the first train overtakes the second train in 60 seconds. During this time, the first train will cover a distance equal to the combined length of both trains.

Let's denote the length of the first train as L₁ and the length of the second train as L₂. Then, we can write,

Distance covered by the first train in 60 seconds = L₁

Distance covered by the second train in 60 seconds = L₂ + L₁ (because the second train is L₂ behind the first train when it is overtaken)

The speed of the first train is 30 m/s, so its distance covered in 60 seconds is:

Distance covered by the first train in 60 seconds = 30 m/s x 60 s = 1800 m

Similarly, the speed of the second train is 20 m/s, so its distance covered in 60 seconds is,

Distance covered by the second train in 60 seconds = 20 m/s x 60 s = 1200 m

L₁ = 1800 m - 1200 m = 600 m

L₁ + L₂ = 1800 m

So the combined length of both trains is:,
L₁ + L₂ = 1800 m

L₁ + L₂ = 1.8 km

Therefore, the combined length of both trains is 1.8 km.

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If the object and image distances with respect to the lens are 17 cm and V cm and the focal length is 10 cm, the image distance will be 6.3 cm

1 / f = ( 1 / v ) - ( 1 / u )

f = Focal length

v = Object distance

u = Image distance

f = 10 cm

u = 17 cm

1 / v = ( 1 / 10 ) + ( 1 / 17 )

1 / v = 27 / 170

v = 6.3 cm

Focal length is the distance between the center of the lens and its point of focus. The image distance is the distance between the center of the lens and the image. The object distance is the distance between the center of the lens and the object.

Therefore, the image distance will be 6.3 cm

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Answer:

is being negatively reinforced. The unpleasant stimulus that Schwartz is experiencing is the electric shock, and by yelling "Uncle!" he is reducing that stimulation and making himself feel better. As a result, he is receiving unfavorable reinforcement for his behavior.

Explanation:

The use of a parachute when jumping out of a plane is beneficial because it reduces the impulse and momentum of the jumper, leading to a safer landing with a reduced risk of injury.

The use of a parachute when jumping out of a plane is beneficial because it reduces the impulse and thus the momentum of the person jumping. Momentum is defined as the product of an object's mass and velocity, and it is conserved if there are no external forces acting on the object.

When jumping out of a plane, the initial momentum of the person is determined by their mass and the velocity they have just before jumping. If they were to fall to the ground simply, the momentum would remain constant and the velocity would increase as they fall, leading to a much greater impact force upon landing.

Thus, the use of a parachute when jumping out of a plane is beneficial because it reduces the impulse and momentum of the jumper, leading to a safer landing with a reduced risk of injury.

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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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