What type of waves can be found during a Tsunami?

The statement is false, and the reasoning is as follows: The principle of conservation of energy states that energy can neither be created nor destroyed but can only be transformed from one form to another.

Principle of conservation of energy states: energy cannot be created or destroyed but can be transformed from one form to another.

In this case, we can assume that the stone is dropped from a height and falls to ground due to the force of gravity. Initially, stone has only gravitational potential energy, which is given as 100 J. As stone falls, it gains kinetic energy, which is the energy of motion. At the point where the stone reaches ground, all of its potential energy has been converted to kinetic energy.

Total energy of the stone at any point during its fall is the sum of its potential and kinetic energy. Therefore, we can write:

So total energy = Gravitational potential energy + Kinetic energy

Total energy at initial position = Total energy at ground level

Or, 100 J = 75 J

This is not possible as we know that energy cannot be created or destroyed and can only be transformed from one form to another.

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The net force on an object if a  force of 30 N to the right is applied to an object. An opposite force of 20 N to the left is applied to the same object is 10 N to the right. And the right option is D.

The net force is the vector sum of all the forces that act upon an object.

To calculate the net force applied to the object, we use the formula below.

Formula:

Where:

From the question,

Given:

Substitute these values into equation 1

Hence the right option is D. 10 N to the right.

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Anthropometry is the science that defines physical measures of a person's size, shape, and functional capabilities.

Developed in 1879 by the French anthropologist Alphonse Bertillon, his Bertillon system uses photographs and measurements of certain physical characteristics to identify people. It was a method of writing. This system was used to track and identify suspects and criminals.

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Answer:

100°

will be the angle of the planks

Answer:

heyyyyyyy

Explanation:

Answer:

Things that electricity cant flow through are called insulators.

Hi friend! I have an iPhone. why do you ask????

Answer:

Explanation:

let east be the positive direction

Δv = vf - vi = 17 m/s - (-15 m/s) = 32 m/s

if you let west be the positive direction, then

Δv = -17 m/s - 15 m/s = -32 m/s

Using concepts of Kinetic Energy, we got that 2.89 times of previous braking distance we need to increase to stop the car.

We have Speed of car = v

Now, when speed is increase by 70%,in that case

new speed of car v'= 1.7 v

We know that K.E=(1/2)×m×v²,where m is the mass of the object and v is the velocity of the object.

Now, when speed is increase by 70% then,

new Kinetic Energy is =(1/2)×m×(1.7)²

New kinetic energy=    (1.7)²K.E₁

New kinetic energy=2.89K.E₁

Hence, to stop the car we need to increase our braking distance to 2.89 times from the previous braking distance.

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An object's mass, rather than its weight is used to indicate the amount of matter it contains because weight is defined as the amount of force due to an existing field (In most cases, gravitational field) that is experienced by the body. The weight of the same body can be different in different environments it's observed.

However, the mass of the body is the exact measure of the amount of matter contained in a body. Which is constant, regardless of the environment, or conditions the body is observed.

Hence, for real-world calculations and experimentation, the mass of the body is considered to represent the amount of matter it contains rather than its weight.

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A variety of time and temperature combinations can be applied to milk (including banana flavor!) to make it safe to drink. Collectively, all of these heat-based approaches are referred to as pasteurization. Pasteurization is a process that involves heating food to a specific temperature for a specific period of time to destroy potentially harmful pathogens while preserving its flavor and nutritional value.

The method was first used by French chemist and microbiologist Louis Pasteur in the 19th century to keep wine and beer from spoiling.

There are several methods of pasteurization, but the most common involves heating milk to 145°F (63°C) for at least 30 minutes, followed by rapidly cooling it to 39°F (4°C) or lower.

Another method, called high-temperature, short-time (HTST) pasteurization, heats the milk to 161°F (72°C) for 15 seconds, followed by rapid cooling to 39°F (4°C) or lower.

Other heat-based approaches include ultra-pasteurization, which involves heating milk to 280°F (138°C) for two seconds, and flash pasteurization, which heats the milk to 161°F (72°C) for 15 seconds before cooling it quickly.

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The maximal static friction force (F) between surfaces in contact prior to motion starting is divided by the normal force (N) to determine the coefficient of static friction. Solving yields a value of 1.08 m/s2.

The maximal static friction force (F) between surfaces in contact prior to motion starting is divided by the normal force (N) to determine the coefficient of static friction.

Static friction's highest value is F s = _s mg.

where _s is the static friction coefficient

50kg is the box's weight in meters.

Gravitational acceleration is equal to 9.81 m/s2.

F s = 0.5×50×9.81 =245 N

The object must be in motion because the applied force exceeds the static friction's maximum value, F s.

As a result, kinetic friction rather than static friction must be considered.

by the equilibrium state

ma = F k m g

where F = 250 N, k = kinetic friction coefficient = 0.4, and m = 50 Kg

a = box's acceleration

50a = 250-0.4×50×9.81

Solving yields a value of 1.08 m/s2.

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The statement "density of a substance is one gcm³" refers to a physical quantity that describes the amount of mass per unit volume of a substance. The unit of density is grams per cubic centimeter (g/cm³) which is usually denoted by the symbol ρ (rho).

Density is a scalar quantity and is always positive. It is used to characterize the physical properties of materials and is often used in engineering and science. Density is an intensive property and does not depend on the size or shape of the sample. The density of a substance is typically reported at a specified temperature and pressure.

At standard temperature and pressure (STP) of 0°C and 1 atm, the density of water is one gram per cubic centimeter (g/cm³). If a substance has a density of one g/cm³, it means that one cubic centimeter of that substance has a mass of one gram. For example, if we have a block of iron with a volume of one cubic centimeter, its mass would be one gram since the density of iron is approximately 7.87 g/cm³.

In contrast, if we had a block of aluminum with a volume of one cubic centimeter, its mass would be 2.7 grams since the density of aluminum is approximately 2.7 g/cm³.'

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A steam engine ( Carnot engine ) has an efficiency of 73%. If the waste heat has a temperature of 24◦C, the temperature of the boiler is 827.41°C.

Both 121°C (250°F) and 132°C (270°F) are commonly used steam sterilising temperatures. For a short period of time, these temperatures (and other high temperatures) must be held in order to destroy microbes.

efficiency = 1 - (Temp_cold / Temp_hot)

Temp_cold = 24°C + 273.15 = 297.15 K

efficiency of 73%.=  .73

Tem_hot = T_cold / (1 - efficiency)= 297.15 K / (1 - 0.73)

Tem_hot = 1100.56 K

Finally, by deducting 273.15, we may change the temperature of the hot reservoir back to Celsius:

Tem_hot = 1100.56 K - 273.15 = 827.41°C

hence, he temperature of the boiler is 827.41°C.

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Answer:

a is your answer.............

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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Answer:

-It holds people's belongings tight to Earth's surface

-it helps cool Earth's surface

- it keeps the solar wind from reaching earth

The student's claim is untrue. When the rod is brought closer, sphere A is polarized, and sphere B acquires a net negative charge. When the rod is removed, sphere B remains charged but sphere A does not remain polarized.

An uncharged object has a neutral charge because it has the same number of protons and electrons. An object is said to be positively charged if it lacks electrons and negatively charged if it has an excess of electrons.

The nature of electric charges is that if the charges are the same, they will repel each other, and if the charges are different, they will attract. So a charged object can attract other charged objects that have a different charge or attract one type of charge on an uncharged object.

When the positively charged rods are brought closer but do not touch ball A. Then sphere A, sphere A is polarized, and sphere B is negatively charged. When the rod is removed, sphere B remains charged but sphere A does not remain polarized.

Complete the question, see the picture.

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The incorrect statement is a. The ball does not accelerate in the horizontal direction.

When the ball is projected horizontally, it moves forward with a constant horizontal velocity. This means that it does not accelerate in the horizontal direction, so statement a is incorrect. However, in the vertical direction, the ball is subject to the force of gravity, which causes it to accelerate downwards at a rate of 9.8 m/s^2. This means that the ball's vertical velocity changes by 9.8 m/s each second. When the ball hits the ground, it has both a horizontal and vertical velocity, so statement c is also incorrect.

The incorrect statement is a. The ball does not accelerate in the horizontal direction. However, in the vertical direction, the ball is subject to the force of gravity, which causes it to accelerate downwards at a rate of 9.8 m/s^2. When the ball hits the ground, it has both a horizontal and vertical velocity, so statement c is also incorrect.

When a ball is projected horizontally from the top of a cliff and free falls to the ground, it does not accelerate in the horizontal direction, but it does accelerate in the vertical direction due to the force of gravity. When the ball hits the ground, it has both a horizontal and vertical velocity.

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The names of meteor showers (Geminids, Leonids, Perseids, Quadrantids) are names of meteor radiant points which are in the apparent direction of the luminous tails of individual meteors seen all over the sky.

The Quadrantids, for example, appear to radiate from the constellation Boötes.

The names of meteor showers (Geminids, Leonids, Perseids, Quadrantids) are names of radiant points which are in the apparent paths of the luminous tails of individual meteors seen all over the sky.

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Answer:

The value  is  \(s = 306.6 \ m\)

Explanation:

From the question we are told that

   The  acceleration is \(a = 2.52 \ m/s\)

    The speed to attain is \(v = 39.2 \ m/s\)

Generally the time taken is mathematically represented as

        \(t = \frac{v}{a}\)

=>    \(t = \frac{39.2}{2.52}\)

=>    \(t= 15.6 \ s\)

Generally from the kinematic equation we have that

      \(s = ut + \frac{1}{2}at^2\)

Here the initial  velocity is  zero i.e  u =  0 \  m/s (it started from rest)

So

     \(s = 0* 15.6 + \frac{1}{2} * 2.52 * (15.6)^2\)

=>  \(s = 306.6 \ m\)

The general equation of simple harmonic motion is

y = a cos (? t )or y = a sin (? t )

but here y = a cos (? t )...because at t=0 amplitude is maximum

Here amplitude 'a '= 0.01 m

m = 0.3 kg

x = 0.02 m

Force constant k is given by,

k = mg / x = 0.3 x 9.8/ 0.02 = 147 N/m

The time period of oscillation is given by ,

T = 2 ? ?( m / k )

? = 2 ? / T = ? ( 147 / 0.3 )

? = 22.1

then y = (0.01m) cos (22.1 t )

In physics, a force is a power that can change the motion of an item. A force can purpose an object with mass to alternate its pace. Pressure also can be described intuitively as a push or a pull. A force has both value and path, making it a vector quantity.

A pressure is a push or a pull and it affects our each day lives because without force, people might not be capable of open and near stuff or lift up our arms or legs.

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The component of the weight of the box along the surface is 105.8 N.

The component of the weight of the box along the surface can be calculated using the formula

W_parallel = W * sin(angle),

where W is the weight of the box and angle is the angle of the inclined surface. To find the weight of the box, we can use the formula W = m * g, where m is the mass of the box and g is the acceleration due to gravity.

Given that the mass of the box is 14 kg, we can calculate the weight of the box as follows:

W = 14 kg * 9.8 m/s^2 = 137.2 N.

Now, let's find the component of the weight along the surface. The angle of the inclined surface is given as 52 degrees.

Using the formula W_parallel = W * sin(angle), we can calculate the component of the weight along the surface:

W_parallel = 137.2 N * sin(52 degrees)

= 105.8 N.

Therefore, the component of the weight of the box along the inclined surface is 105.8 N.

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The resistance of the material at a temperature of 50°C is approximately 25.791 Ω.

We can use the formula for temperature dependence of resistance to solve this problem:

R2 = R1 [1 + α(T2 - T1)]

where R1 is the resistance at temperature T1, R2 is the resistance at temperature T2, and α is the temperature coefficient of resistance.

Plugging in the given values, we get:

R2 = 23 Ω [1 + (3.9 x 10⁻³/°C)(50°C - 20°C)]

Simplifying, we get:

R2 = 23 Ω [1 + (3.9 x 10^-3/°C)(30°C)]

R2 = 23 Ω [1 + 0.117]

R2 = 23 Ω [1.117]

R2 = 25.791 Ω

Therefore, the resistance of the material is approximately 25.791 Ω.

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Answer:

400 m

Explanation:

20m/s x 20s = 400m

Answer:

Joule’s law of heating states that when a current ‘i ' passes through a conductor of resistance ‘r’ for time ‘t’ then the heat developed in the conductor is equal to the product of the square of the current, the resistance and time.

H = i 2 rt

The reason behind the heat produced is the collision of the free electrons with the lattice ions or atoms while accelerating in presence of the external electric field.

we know that

volt= work done/ total charge or v = w/q

from this we get w= vq

we know that current i = q / t

so q = it

putting this in prev equation

we get w = vit

from ohms law v = ir

putting it in prev eq we get

w = irit = i2rt joule as work is stored as heat soH = I2RT Joules

if a current carrying conductor having resistance (r) gets heated by to passing of current (i) for time (t) and the heat thereby produced be H

joules law states that

H propotional to i^ 2 when r and t are constant

H propotional to r when I and t are constant

H propotional to t when r and I constant

15Joule work  when you lift your 10. 0 kg sister to a height of 1. 5 m .

Kinetic energy (K.E.) is inversely proportional to the square of an object's velocity and its mass: K.E. = 1/2 m v2. When a mass is measured in kilograms and a speed is measured in meters per second, the kinetic energy is measured in kilogram-meters squared per second squared.

In mathematics, the idea of work done W is defined as the force f times the distance (d), or W = f. d. If the force is applied at an angle to the displacement, W = f. d cos, and vice versa.

W = f. d

W = 10*1.5 = 15j

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The correct statement of Newton's Second Law is: An object's acceleration is inversely proportional to its mass and proportional to the net force acting on it.

Newton's Second Law of Motion states that the force acting on an object is directly proportional to the mass of the object and its acceleration. In other words, the greater the force applied to an object, the greater its acceleration, and the greater the object's mass, the less it will accelerate for a given force.

This law is often expressed mathematically as F = ma, where F is the force applied to an object, m is the object's mass, and a is its acceleration.

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The average force on the puck by the stick is 448 N

To find the average force on the hockey puck, we can use the impulse-momentum theorem:

Impulse = Change in momentum

The impulse on the puck can be calculated as:

Impulse = mass x change in velocity
Impulse = 0.16 kg x (9 m/s - (-5 m/s))
Impulse = 0.16 kg x 14 m/s
Impulse = 2.24 N*s

The change in velocity is negative because the puck is moving in the opposite direction after the impact.

The impulse on the puck is equal to the average force multiplied by the time of contact:

Impulse = average force x time
2.24 N*s = average force x 0.005 s
average force = 2.24 N*s / 0.005 s
average force = 448 N

Therefore, the average force is 448 N.

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