a silver block initially at 58.5 degrees celsius, is submerged into 100g of water at 24.8 degrees celsius in an insulated container. the final temperature of the mixture upon reaching thermal equilibrium is 26.2 degrees celsius. what is the mass of the silver block?

At the base of the ramp, the box will be moving at a speed of roughly 40.5 m/s.

Acceleration on a ramp is equal to the product of gravitational acceleration and the height to length ratio of the ramp. Acceleration on a ramp is equal to gravity acceleration times the sine of the ramp angle.

Due to its height above the ground at the top of the ramp, the box contains potential energy, as determined by:

PE = mgh

where m is the box's mass, g is gravity's acceleration (9.81 m/s2), and h is the ramp's height (83 meters).

This potential energy is changed into kinetic energy when the box descends the ramp by:

KE = (1/2)mv²

where v denotes the box's speed at the base of the ramp.

Energy is conserved, hence we may compare these two statements:

PE = KE

mgh = (1/2)mv²

Solving for v, we get:

v = √(2gh)

Plugging in the given values, we get:

v = √(29.8183) = 40.5 m/s (rounded to two decimal places)

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Answer:

80 cm

Explanation:

From the diagram attached,

Sum of clockwise moment = sum of anticlockwise

ΣACW = ΣCW

20x = 80(100-x)

Solve for x

20x = 8000-80x

20x+8x = 8000

100x = 8000

x = 8000/100

x = 80 cm.

The position of its pivot from the 20 N end is 80 cm.

The typical speed of commercial aircraft is approximately 460-575 mph, or 740-930 km/h, according to Flight Deck Friend.

The amount of time needed to cover a particular distance on the ground is referred to as ground speed. For instance, when flying at cruising altitude, airplanes may have a ground speed of 300-600 knots (555-1,110 kmph). However, depending on the wind, the plane's speed over the ground may alter.

The aircraft must travel south at a component speed that is opposite of and equal to 80 km/h. The plane's overall speed can only be the same after that. There will be a speed of 320 kilometers per hour.

The typical speed of a commercial airplane is between 460 and 575 mph (740 to 930 km/h).

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In the demonstration described, the charged ball traveled along a path with a vertical segment, a horizontal segment, and a diagonal segment. The potential difference along the horizontal segment can be understood by considering the electric field and potential difference concepts. Here, the electric potential difference experienced by the charged ball along the horizontal segment will be zero.

The electric potential difference, or voltage, is the work done per unit charge as it moves in an electric field. When a charged particle moves along a horizontal segment, it does not experience any change in the vertical direction, meaning that the vertical component of the electric field has no effect on the potential difference along this segment.

In this scenario, the horizontal segment implies that the charged ball is not moving closer to or further away from the source of the electric field. Therefore, the electric potential difference experienced by the charged ball along the horizontal segment will be zero. This is because the work done on the charged ball by the electric field along the horizontal path is zero, as there is no change in the ball's distance from the source of the field in this direction.

In summary, the potential difference along the horizontal segment of the path is zero, as there is no work done on the charged ball by the electric field in the horizontal direction.

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Answer:

B. The kinetic energy of the ball change into potential energy as the ball rises.

Explanation:

This can seem a little bit confusing at first, but once you understand Kinetic Energy, you'll get it right away. Kinetic Energy is energy an object has when it is moving. So for example, you have kinetic energy when you run, a pen has kinetic energy when you drop it in class, and the ball has kinetic energy as it rises.

However, because of outside forces, objects with kinetic energy will eventually lose it. These forces can be anything from friction as an object slides across a surface, to the negative acceleration due to gravity.

In this question, the force working against the motion of the ball is gravity. As you know, when you throw something up, it has to come down, because of gravity. As the ball goes up, it has enough kinetic energy that it continues its upward motion, however it slowly looses that energy, causing it to slow to a stop before falling back to the ground.

On the way up, the energy of the ball changes from this kinetic (moving energy) to what we call potential energy. Potential energy is exactly what is sounds like, it is the potential for something to begin moving. So, as the ball goes higher, it has a lower chance of continuing to go up (meaning it's loosing it's kinetic energy) and higher chance of falling back down (meaning it's gaining potential energy).

Hope this helps.

Answer:

108 N

Explanation:

F = ma

F = (90kg)(1.2m/s^2)

F = 108 N

The teledeltos paper does not conduct charges well, in comparison the metal electrodes are better conductors. When the power supply is turned on,  charge builds up on the conductors. The path do charges follow between the electrodes is least resistance. The charges are transported from one electrode to the other via the path of least resistance.

Electrons have a negative charge, and they are attracted to a positive charge. As a result, electrons flow from negative to positive in electrical circuits. The movement of electrons is referred to as an electrical current. The charges flow through the conductor as the voltage is applied, and the path of least resistance is followed between the electrodes.

The charges travel through the metal electrodes because they have low resistance, while the teledeltos paper has a high resistance which means that it does not conduct charges well. The charges are transported through the metal electrodes between the two electrodes due to their excellent electrical conductivity.

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A secondary rainbow is typically seen in the early afternoon, not in the morning. It is not brighter than the primary rainbow, but it does have a broader band of colors.

The secondary rainbow is formed from the same process as the primary rainbow, but it is reflected twice within the raindrops, creating a reverse order of colors.

The secondary rainbow is always above the primary rainbow and is often fainter in appearance. It is formed from both water and ice crystals in the atmosphere.

A secondary rainbow is a fainter and less commonly observed rainbow that appears outside of the primary rainbow. It is caused by a second reflection and refraction of sunlight within raindrops, resulting in a reversal of colors.

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An appliance is in a room repeatedly making the same sound all day. As the room heats up from 25 degrees Celsius to 35 degrees Celsius is

B) The sound wave's frequency decreases

As the temperature of the room increments, the speed of sound waves within the discussed increments.

In any case, the recurrence of the sound wave created by the machine remains steady. This implies that the wavelength of the sound wave changes as the speed of the wave changes.

Agreeing with the wave condition, the speed of a wave is rise to its recurrence increased by its wavelength.

Subsequently, in the event that the speed of the wave increments and the recurrence remains steady, the wavelength must diminish. This results in a diminish within the recurrence of the sound wave, making it lower pitched. 

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Answer:

Its A the other person is wrong

Explanation:

To estimate the radius of the largest asteroid from which you could reach escape speed just by jumping, we need to consider the gravitational potential energy and kinetic energy involved.

Escape speed refers to the minimum speed required for an object to escape the gravitational pull of a celestial body. The escape speed can be calculated using the formula:

Escape speed (v) = √(2GM/r)

Where G is the gravitational constant (approximately 6.67430 × 10^-11 m³/(kg·s²)), M is the mass of the celestial body, and r is its radius.

In this case, we are assuming that reaching escape speed just by jumping means imparting enough kinetic energy to overcome the gravitational potential energy. Therefore, the initial kinetic energy is equivalent to the change in gravitational potential energy.

The gravitational potential energy (PE) is given by the formula:

PE = -GMm/r

Where m is the mass of the jumping object and r is the radius of the celestial body.

To reach escape speed, the kinetic energy (KE) must be equal to the absolute value of the gravitational potential energy:

KE = |PE|

Since both the gravitational potential energy and kinetic energy involve mass (m), we can cancel out the mass in the equation.

GM/r = v²/2

Simplifying the equation, we get:

r = GM/v²

Substituting the known values, with the assumption that the mass of the jumping object is negligible compared to the mass of the asteroid, and the escape speed is equal to the speed achieved by jumping, we have:

r = (6.67430 × 10^-11 m³/(kg·s²)) * (2500 kg/m³) / v²

The value of v² is the square of the escape speed achieved by jumping. However, the specific value of this speed is not provided, so we cannot provide a numerical estimate for the radius of the largest asteroid from which you could reach escape speed just by jumping.

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Answer:

i think it is newtons third law of motion but i'm not sure sorry.i just really need point i don't know the answer.

Explanation:

72 m/s

Explanation:

Given,

Frequency ( f ) = 6 Hz

Wavelength ( λ ) = 12 m

To find : -

Speed ( v ) = ?

Formula : -

v = f x λ

v

= 6 x 12

= 72 m/s

Therefore,

the speed of a wave with a frequency of 6 Hz and a wavelength of 12 m is 72 m/s.

According to Newton’s first law of motion, an object at rest will begin to move, when an unbalanced force acts upon it.

option B is the correct answer.

Newton's first law of motion, also known as the law of inertia, states that an object at rest will remain at rest, and an object in motion will continue in motion with a constant velocity unless acted upon by an external force.

In other words, an object will maintain its state of motion (whether it is at rest or moving in a straight line at a constant speed) unless a force acts upon it.

Thus, according to Newton’s first law of motion, an object at rest will begin to move, when an unbalanced force acts upon it.

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Answer:

its B

Explanation:

James Clerk Maxwell carried out important investigations on the nature of light in the 1860s.

In the 1860s, James Clerk Maxwell carried out important investigations on the nature of light. He studied the phenomenon of color vision and discovered that white light is composed of different colors. His studies of color vision led to the development of a new color theory called additive color theory. He also discovered that light has both wave-like and particle-like properties and proposed the idea that electromagnetic waves could exist. This led to the development of the electromagnetic theory of light, which showed that light is a form of electromagnetic radiation and is capable of traveling through space.

In conclusion, Maxwell's investigations in the 1860s greatly expanded our understanding of the nature of light and laid the groundwork for many important developments in physics and technology.

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The work  was done to move the block  across the floor  is 400 Joule.

The definition of force in physics is: The push or pull on a massed object changes its velocity. An external force is an agent that has the power to alter the resting or moving condition of a body. It has a direction and a magnitude.

A spring balance can be used to calculate the Force. The Newton is the SI unit of force.

Force applied on the block: F = 40 N.

Displacement of the box = 10 m.

Hence, work  done to move the block = Force × Displacement

= 40 × 10 joule

= 400 joule.

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Answer:

Tt can be calculated by copy

The time interval where the rotational kinetic energy increases is when fmotor is greater than 0.4n and decreases is when fmotor is less than 0.4n.

What is rotational kinetic energy?

Rotational kinetic energy is the kinetic energy associated with the rotation of an object. It is equal to the work done in rotating an object (a moment of force multiplied by the angular displacement) and is equal to one-half the moment of inertia of the object multiplied by the angular velocity squared.

The rotational kinetic energy of the wheel is given by the equation:

K.E. = 1/2 Iω2

where I is the moment of inertia and ω is the angular velocity.

The moment of inertia is given by I = mr2, where m is the mass of the wheel and r is the radius of the wheel.

The angular velocity is given by ω = v/r, where v is the linear velocity of the wheel.

The linear velocity of the wheel is given by v = 2πfr, where f is the frequency of rotation.

The frequency of rotation is given by f = (fmotor - 0.4n)/(2πr).

The rotational kinetic energy can therefore be written as:

K.E. = 1/2 m(2πfr)2r2

Time interval where the rotational kinetic energy increases:

The rotational kinetic energy increases when the linear velocity of the wheel (v) increases. This happens when the frequency of rotation (f) increases. This is when fmotor is greater than 0.4n.

Hence, the time interval where the rotational kinetic energy increases is when fmotor is greater than 0.4n.

Time interval where the rotational kinetic energy decreases:

The rotational kinetic energy decreases when the linear velocity of the wheel (v) decreases. This happens when the frequency of rotation (f) decreases. This is when fmotor is less than 0.4n.

hence, the time interval where the rotational kinetic energy decreases is when fmotor is less than 0.4n.

Therefore, The time interval where the rotational kinetic energy increases is when fmotor is greater than 0.4n and decreases is when fmotor is less than 0.4n.

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Answer:

\(E=1.58*10^6N/C\)

The direction is toward the negative x axis i.e the Rod

Explanation:

From the question we are told that:

Length \(L=14.0cm\)

Total charge \(q=-22.0\muC\)

Distance \(d=36cm=>0.36m\)

Generally the equation for Electric Field is mathematically given by

 \(E=\frac{kq}{d^2}\)

Since Magnitude of E is at 36cm away from center

 \(E=\frac{kq}{d^2-(L/2)^2}\)

 \(E=\frac{9*10^9*(22*10^6)}{0.36^2-(0.14m/2)^2}\)

 \(E=1.58*10^6N/C\)

Therefore with Charge Bearing the Negative sign the direction is toward the negative x axis i.e the Rod

Answer:

this is an example of acceleration

Answer:

Honestly I cant understand that so please explain it someone

Explanation:

Answer:

The law of conservation of energy states that when one form of energy is transformed to another, no energy is destroyed in the process. According to the law of conservation of energy, energy cannot be created or destroyed. So the total amount of energy is the same before and after any transformation

Explanation:

The energy in a system always transforms from one form to another without any significant loss or addition. It simply changes from one form to another with the effect of numerous external influences.

Energy transformation may be defined as the process through which energy can convert from one form to another. It also illustrates the migration of energy from one place to another due to physical factors.

According to the law of conservation of energy, in a closed system energy can neither be created nor destroyed. The total amount of energy remains the same before and after the process of transformation.

Therefore, the energy in a system always transforms from one form to another without any significant loss or addition.

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Answer:

Centripetal force is the force that your body is moving in a circular way towards the center where your body is moving

Explanation:

The dimension of maximum height is M.

The dimension of time of flight is T.

The dimension of range of projectile is M.

The maximum height reached by a projectile is the highest vertical height attained by the projectile.

H = u² sin²θ / 2g

where;

The unit of maximum height is meters, so the dimension will be  M.

The time of flight of a projectile is the total time spent in air by a projectile.

T = 2usinθ / g

The unit of time of flight is seconds, and the dimension will be T.

The range of a projectile is given as;

R = u² sin(2θ) / g

The unit of range of a projectile is meters and the dimension is M.

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We want to see if the Trust SSC can archive a higher maximum speed.

Remember the second Newton's law:

Force = mass*acceleration.

And acceleration is the rate of change of the velocity.

Assuming the mass of the Trust SSC does not change, increasing the force would mean that we increase the acceleration, and thus, larger velocities can be reached.

Now there are some problems.

How we do increase the force?.

It is hard to ve precise, mostly because we don't really know how the system works, we just got some given random data that we can't use without context.

Another thing we need to remember, this velocity is measured in only one mile. So because we have a fixed distance to measure it, we only can get larger velocities by increasing the acceleration.

And to increase the acceleration we can increase the force, as discussed, or, decrease the mass.

How to decrease the mass? Using lighter materials.

Now let's see an example on how decreasing the mass would affect the acceleration.

Then an aproximate force is given by:

F = 10,700kg*20.8 m/s^2 = 222,560 N

Now, if we decrease the mass a little bit, for example to 10,000kg, and we do not change the force, the new acceleration will be given by:

10,000kg*a = 222,560 N

a = (222,560 N)/(10,000kg) = 22.3 m/s^2

So decreasing the mass a little, increases the acceleration, which would make a larger maximum velocity.

Concluding, there are two ways of increasing the maximum velocity:

Increasing the force.

Decreasing the mass of the car.

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Answer:

because it would reduce the use of more electricity for same light output

The difference in path lengths from each of the slits to the location of the center of a third-order bright fringe on the screen is 0.0702 meters.

In a Young's double-slit experiment, the interference pattern is created by the superposition of light waves from two parallel slits. The path difference between the waves determines the location of bright and dark fringes on the screen.

To calculate the difference in path lengths from each of the slits to the center of a third-order bright fringe, we can use the formula:

Δx = (m * λ * L) / d

Where:

Δx is the path difference,

m is the order of the fringe (in this case, m = 3),

λ is the wavelength of light,

L is the distance between the slits and the screen, and

d is the slit separation.

Given:

λ = 589 nm = 589 x 10^(-9) m,

L = 4.00 m, and

d = 0.100 mm = 0.100 x 10^(-3) m,

Substituting the values into the formula:

Δx = (3 * (589 x 10^(-9)) * (4.00)) / (0.100 x 10^(-3))

Simplifying the expression:

Δx = 0.0702 m

Therefore, the difference in path lengths from each of the slits to the location of the center of a third-order bright fringe on the screen is 0.0702 meters.

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