What is the velocity of an object that has been in free fall for 2.5

Answer:

\(7,500\:\text{Watts}\)

Explanation:

Power is given by \(P=\frac{W}{\Delta t}\), where \(W\) is work and \(\Delta t\) is elapsed time. To calculated work, we'll use \(W=F\Delta x\), where \(F\) is force and \(\Delta x\) is displacement. Substituting given values, we have:

\(W=10\cdot 50\cdot 60=30,000\:\text{J}\).

Now plugging this in to our power equation, we get:

\(P=\frac{30,000}{4}=\boxed{7,500\:\text{W}}\)

Answer:

The power developed by the machine is 7700 Watt.

Explanation:

\(p = \frac{w}{t} \)

Holding Brick 2 in place requires more force than holding Brick 1 just beneath the water's surface due to the higher pressure and buoyant force acting on it at a greater depth.

The force needed to hold Brick 2 in place underwater is greater than the force needed to hold Brick 1 just beneath the surface. This difference in force is primarily due to the increased pressure acting on Brick 2 as a result of its deeper position in the water.

In this scenario, there are two main forces acting on the bricks: the gravitational force, also known as weight (W), and the buoyant force (Fb). The weight of the bricks remains constant regardless of their position, as it depends only on their mass and the acceleration due to gravity. The buoyant force, on the other hand, depends on the volume of fluid displaced by the bricks and the density of the fluid, which in this case is water.

The pressure in a fluid increases with depth, which means that the buoyant force acting on Brick 2 is greater than that acting on Brick 1. Consequently, to keep Brick 2 submerged at a depth of 2 feet, you would need to exert a greater force to counteract the increased buoyant force.

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approximately 2.093 x 10^(-6) cubic meters (or 2.093 milliliters) of coffee has spilled out of the beaker.To calculate the volume of coffee that has spilled out of the beaker, we can use the concept of thermal expansion. The change in volume is given by the formula ΔV = βVΔT, where β is the coefficient of volume expansion, V is the initial volume, and ΔT is the change in temperature.

First, let's convert the initial volume to cubic meters: V = 0.858 x 10^(-3) m^3.
Next, we calculate the change in temperature: ΔT = 90.6 - 18.2 = 72.4 °C.
The coefficient of volume expansion for water (and coffee) is approximately β = 3.4 x 10^(-4) °C^(-1).
Plugging in these values into the formula, we get:
ΔV = (3.4 x 10^(-4) °C^(-1)) * (0.858 x 10^(-3) m^3) * (72.4 °C) = 2.093 x 10^(-6) m^3.

Therefore, approximately 2.093 x 10^(-6) cubic meters (or 2.093 milliliters) of coffee has spilled out of the beaker.

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The different colors of light we perceive are a result of the varying frequencies (and wavelengths) of the electromagnetic radiation. The order of the primary colors by their wavelength, from shortest to longest, is

b, y, r

To order the primary colors (red, yellow, and blue) by their wavelength, we need to consider the visible light spectrum. The visible light spectrum ranges from shorter wavelengths (higher frequencies) to longer wavelengths (lower frequencies).

Here's a brief explanation:

1. Blue (b) light has a shorter wavelength compared to red and yellow light. It has higher frequency and is closer to the ultraviolet region of the electromagnetic spectrum.

2. Yellow (y) light has an intermediate wavelength between blue and red light.

3. Red (r) light has a longer wavelength compared to blue and yellow light. It has lower frequency and is closer to the infrared region of the electromagnetic spectrum.

So, the correct order of the primary colors by their wavelength, from shortest to longest, is "b, y, r."

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Answer:

Explanation:

The answer to that question is "both," though past players tend to have used heavier bats than do today's players. Baseball's "king of swat" Babe Ruth reportedly began his hitting career using a 54 ounce (1.5 kg) hickory bat, and is known to have used a 40oz bat in 1927 when he hit his 60 home runs.[1] Ty Cobb and Joe Di Maggio both played with 42oz bats and Rogers Hornsby used a 50oz piece of lumber. George Sisler, playing for the St. Louis Browns in the 1920's, made his bat heavier by hammering Victrola needles into the barrel of his bat.[2] In the 1950's Cincinnati Reds' Ted Kluszeski hammered tenpenny nails into his bat to make it heavier.

Other great hitters including Ted Williams, Rod Carew and Stan Musial used much lighter bats: 31-33oz.[1] Roger Maris used a 33oz bat to hit his 61 home runs in 1961. Many players have tried to make their bats lighter by drilling a hole in the barrel and filling it with cork. Detroit Tigers' Norm Cash admitted to using a corked bat in 1961 when he won the batting title with a .361 average (though he slumped to .243 the next year with the same corked bat).[2]

Kirkpatrick[3] reports that Roger Maris participated in a 1962 experiment in which he batted for distance with 5 different new bats whose weights varied from 33 to 47oz. He hit 5 long fly balls with each bat and the distances were measured and correlated to bat weight. The heavier bats, on average, resulted in further distance. However, Maris' preferred bat (which he used to break Babe Ruth's home run record) was the lightest of the set, even though it produced the shortest distance fly balls. Mark McGwire used a 35oz bat to hit his 70 home runs in 1998, and Barry Bonds used a 32oz bat to hit his 73 home runs in 2001. Most of today's major league players typically use 31-35oz bats.

Physicists have shown,[3,4] from a simple collision analysis, that the optimum bat weight is between 15 and 18oz. However, no professional batter uses a bat this light (in fact, you cannot make a wood bat this light). NCAA regulations[x] recently imposed a -3 rule (length in inches minus weigh in ounces cannot exceed 3) so that 34 inch bats must weigh 31oz. So far no such rule exists for Little League play, and -12 composite bats were introduced for the 2003 season. This brings us back to our original questions: which is better: heavier or lighter bats? So, what is the optimum bat weight, and what criteria influence this choice? Let's start by looking at the collision between ball and bat.

Answer:

41.52 m

Explanation:

Using,

v = d/t....................... Equation 1

v = speed of pulse of sound, d = distance travelled by the pulse of sound, t = total time taken.

From equation 1, make d the subject of the equation

d = vt............................ Equation 2

Given: t = 0.12 s.

Constant: v = 346 m/s

Susbtitute these values into equation 2

d = 346(0.12)

d = 41.52 m

Virginia is officially called as Commonwealth of Virginia. It is a state in the Mid-Atlantic and South-eastern regions of the United States between the Atlantic Coast and the Appalachian Mountains.

Commonwealth countries just like other countries have independent Foreign policies, Defence policies, or political policies. They put themself in the commonwealth because in past they are the colony of any other country. But the country can leave the commonwealth group.

The statement that describes the paleontology of the states are :

a. variety of historical eras are represented by the rocks in Virginia.

b. A sea once engulfed Virginia.

c. The Allegheny Plateau includes coal deposits.

d. In the past, the state's weather was warm and muggy, resembling a tropical rainforest.

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Two strings are vibrating at the same frequency of 200 hz. after the tension in one of the strings is decreased, an observer hears seven beats each second when the strings vibrate together new frequency is 218 hertz frequency is decreases

Two strings are present in this query; they are two strings, mm. They are both vibrating at the same pitch. That equals 2:27 Hz. Let's assume that the tension after one string is constant tension and that this is a result of tension. As a result, one of the strings' tensions lowers. In this case, observer a little frequency He perceives a nine-beat rhythm while the strings are vibrating in unison. Decide on the new frequency in the adjusted strength. Therefore, as far as we are aware, the bid frequency vs the beat frequency is the difference in frequency. Both the initial and the final frequencies are as follows. Consequently, this is how beat frequency is expressed.

The beat frequency is therefore stated as being nine at night. Because whenever the two strings vibrate together, beats are created. We have nine beats, so there you have it. The initial frequency is 227 Hz when these two strings are vibrating together. The new modified frequency is being calculated. This f. dash therefore equals 2: 7 -9. Therefore, 218 Hz is what f dash equals. We have therefore changed our frequency to this. As a result, no beats will be made when these two strings are vibrating. Therefore, frequency will likewise drop if tension in this string reduces. As a result, it is clear that the starting frequency is 2 27 hertz. If you lower the tension, you'll notice that the new frequency is 218 hertz. So you can see the frequency is decreases

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Answer: 41.9 below the negative x-axis.

Explanation: To find the direction of the resultant vector, we need to use some trigonometry and vector addition. Here are the steps:

Draw a diagram of the particle’s motion and label the vectors. The particle starts at the origin and moves 7.22 cm in the negative y-direction, which we can call vector A. Then it moves 8.05 cm in the positive x-direction, which we can call vector B. The resultant vector R is the vector that goes from the origin to the final position of the particle.

Find the components of vector A and vector B. Vector A has a magnitude of 7.22cm and a direction of 270 degrees (or -90 degrees) from the positive x-axis. Vector B has a magnitude of 8.05 cm and a direction of 0 degrees (or 360 degrees) from the positive x-axis. Using trigonometry, we can find the x and y components of each vector as follows:

A_x = A cos(270) = 7.22 cos(270) = 0

A_y = A sin(270) = 7.22 sin(270) = -7.22

B_x = B cos(0) = 8.05 cos(0) = 8.05

B_y = B sin(0) = 8.05 sin(0) = 0

Add the components of vector A and vector B to get the components of vector R. Using vector addition, we can find the x and y components of the resultant vector as follows:

R_x = A_x + B_x = 0 + 8.05 = 8.05

R_y = A_y + B_y = -7.22 + 0 = -7.22

Find the magnitude and direction of vector R using Pythagoras’ theorem and inverse tangent function. The magnitude of vector R is given by the square root of the sum of the squares of its components, and the direction of vector R is given by the inverse tangent of its y component divided by its x component, as follows:

R = sqrt(R_x^2 + R_y^2) = sqrt(8.05^2 + (-7.22)^2) = sqrt(114.81) = 10.71 cm

theta = tan^-1(R_y / R_x) = tan^-1(-7.22 / 8.05) = -41.9 degrees

Adjust the direction of vector R according to its quadrant. Since vector R is in the fourth quadrant, where both x and y are positive, we need to add 360 degrees to its direction to get a positive angle measured counterclockwise from the positive x-axis, as follows:

theta = -41.9 + 360 = 318.1 degrees

Alternatively, we can express the direction of vector R as an angle measured clockwise from the negative x-axis, which is equivalent to subtracting its direction from 360 degrees, as follows:

theta = 360 - (-41.9) = 401.9 degrees

However, since angles are periodic with a period of 360 degrees, we can subtract multiples of 360 degrees from this angle to get an equivalent angle between 0 and 360 degrees, as follows:

theta = 401.9 - 360 = 41.9 degrees

Therefore, the direction of vector R is either 318.1 degrees counterclockwise from the positive x-axis or 41.9 degrees clockwise from the negative x-axis.

Hope this helps, and have a great day! =)

Answer:

Weather

Weather describes what the atmosphere is like at a specific time and place, and may include temperature, wind, and precipitation. Weather is the change we experience from day to day. Climate is the long-term average of weather in a particular spot.

Explanation:

By using the Kohler curves is 4×\(10^{-5} cm\). If Rh is not shown in the graph therefore the sensitivity is near 1.00 S Rh is 88%. That is 0.0055 means 0.55%.

Kohler curves, also known as Kohler plots, are a graphical representation of the magnetoresistance of a material as a function of the magnetic field strength. They were first introduced by Walter Kohler in 1934 to describe the behavior of ferromagnetic materials. Kohler curves are useful in the study of magnetic materials and have applications in the development of magnetic sensors and memory devices.

Kohler curves plot the ratio of the resistance of a material at a given magnetic field strength to its resistance in the absence of a magnetic field, versus the square of the magnetization of the material. The resulting curve can be used to determine the degree of spin polarization in the material, which is a measure of the alignment of electron spins in the material with the magnetic field.

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Complete Question:

Using the Kohler curves estimate the following: (a) the radius of the droplet that will form on a sodium chloride particle of mass 10^-18 kg in air that is 0. 1% supersaturated; (b) the relative humidity of the air adjacent to a droplet of radius 0. 4 microns that contains 10^-19 kg of dissolved ammonium sulfate; (c) the critical supersaturation required for an ammonium sulfate particle of mass 10^-19 kg to grow beyond the haze state

Answer:

Radio waves, I believe

Explanation:

Answer:

radio yes yup yup yup yup

Answer:

It would lift the object to the same height than before you move it 3 centimeters to the left. You see, the height doesn't change if you move the inclined plane horizontally, because height is a vertical variable.

Therefore, if the inclined plane has a height of 1 meters, then the object will be lifted 1 meters up, no matter if you move the inclined plane 50 meters horizontally, it won't change its height.

Answer:

The adapted expression for average acceleration is \(a = \frac{v}{t'}\).

Explanation:

Let be \(v = v_{o} + a\cdot t\), which can be adapted by using the following substitution:

\(t = t'-t_{o}\)

Where:

\(t'\) - Final instant, measured in seconds.

\(t_{o}\) - Initial instant, measured in seconds.

\(v = v_{o}+a\cdot (t-t_{o})\)

Where:

\(v\) - Final velocity, measured in meters per second.

\(v_{o}\) - Initial velocity, measured in meters per second.

\(a\) - Average acceleration, measured in meters per square second.

Now, average acceleration is cleared:

\(a = \frac{v-v_{o}}{t'-t_{o}}\)

Given that \(t_{o} = 0\,s\) and \(v_{o} = 0\,\frac{m}{s}\), then:

\(a = \frac{v}{t'}\)

Answer:

a = (v-v0)      

     ____      where v = final velocity, v0

         t

Explanation:

Using algebra, , where v = final velocity, v0 = initial velocity, and t = time. So,

= -9.3 m/s2.

Responder:

Explicación:

Se dice que el trabajo se realiza cuando una fuerza aplicada a un objeto hace que el objeto se mueva a través de una distancia. El trabajo realizado por un cuerpo se expresa mediante la fórmula;

Workdone = Fuerza * Distancia

Como Fuerza = masa * aceleración,

Workdone = masa * aceleración * distancia

Masa dada = 5.0kg, aceleración = 2.0m / s² d =?

Para obtener d, usaremos una de las leyes del movimiento,

d = ut + 1 / 2at²

u = 0 (ya que el cuerpo acelera desde el reposo) yt = 7.0s

d = 0 + 1/2 (2) (7) ²

d = 49m

Workdone = 5 * 2 * 49

Workdone = 490 Julios

Yes , Crystalline regions in thermoplastics help increase their strength, stiffness, and resistance to heat.

This is because the crystalline structure provides a more ordered arrangement of polymer chains, which increases the intermolecular forces and makes the material stronger.

Crystallinity in thermoplastics can be introduced by cooling the material from its molten state to its solid state, which allows the polymer chains to arrange themselves in a more ordered structure. This is known as "thermal crystallization."

Alternatively, crystallinity can be induced by stretching or orienting the material in a particular direction, which also causes the polymer chains to align themselves in a more ordered structure. This is known as "cold crystallization" or "orientation-induced crystallization."

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Answer:

kinetic

Explanation:

Answer:

The functionality of a body can be restored with the help of appropriate flexibility and strengthening. Once everything is in place, you can exercise those muscles specifically for balance to put them to the test. Your body may then adjust, improving your general stability as you get better at completing those activities.

Answer:

The stability of an object is increased when the lower the centre of gravity is.

So we should try to lower the centre of gravity.

Answer:

C. 3.2 x 10^8 Ω•m

Explanation:

An insulator is a material that resists the flow of electricity.

In the given data the material with the highest resistivity is the best insulator

3.2 x 10^8 Ω•m

Approximately 5.95 x \(10^1^8\)neutrinos are produced in the Sun every second.

The number of neutrinos produced in the Sun every second can calculated by using  luminosity-flux equation:

L = 4πr²F

where L is the luminosity, r is the distance from the source (in this case, the Sun), and F is the flux.

Given that the flux at Earth's surface is approximately 70 billion solar neutrinos per square centimeter per second, we can substitute this value into the equation:

L = 4π(1 AU)²(70 billion neutrinos/cm²/s)

Note that 1 astronomical unit (AU) is the average distance from the Earth to the Sun, which is approximately 149.6 million kilometers or 93 million miles.

Now, we need to convert the area from square centimeters to square meters, which is 1 cm²= 0.0001 m²:

L = 4π(1 AU)²(70 billion neutrinos/cm²/s)(0.0001 m²/cm²)

Simplifying the equation:

L = 4π(1 AU)²(7 million neutrinos/m²/s)

Now we can calculate the number of neutrinos produced in the Sun every second by multiplying the luminosity (L) of the Sun by the flux (F) at Earth's surface:

Number of neutrinos produced in the Sun per second = L * F

Number of neutrinos produced in the Sun per second = 4π(1 AU)²(7 million neutrinos/m²/s) * (1.496 x \(10^1^1\)meters)²

Calculating the expression:

Number of neutrinos produced in the Sun per second ≈ 5.95 x \(10^1^8\)neutrinos

Therefore, approximately 5.95 x \(10^1^8\) neutrinos are produced in the Sun every second.

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Answer:

To find the mass using density and volume we just multiply them against each other which causes ml to cancel and just leaves us with grams which represents how much the item weights.

\(mass=density*volume\)

\(mass=0.875\frac{g}{ml}*4.0\ ml\)

\(mass=3.5\ g\)

Therefore, our final answer is that our pencil weight 3.5 grams

Hope this helps!  Let me know if you have any questions

The mass of a pendulum has no impact on its period. The period of a pendulum is determined solely by the length of the pendulum and the gravitational acceleration acting on it.

According to the laws of mechanics, the period of a pendulum is determined solely by its length and the gravitational acceleration acting on it. Because the mass of the bob does not impact the time it takes for the pendulum to complete a swing, the mass of the pendulum has no impact on its period. The mass of the bob is not included in this formula, implying that it has no impact on the pendulum's period.The effect of mass on the pendulum's motion can be demonstrated using another formula, which describes the period of a physical pendulum.

The motion of a pendulum is harmonic, which means that it repeats itself in time and space. The period of a harmonic motion is the time it takes for one complete cycle to occur. The mass of the pendulum bob, on the other hand, has no impact on the time it takes for the pendulum to complete a swing.To better understand why this is the case, consider the formula for the period of a pendulum: T = 2π √(L/g), where T is the period, L is the length of the pendulum, and g is the gravitational acceleration. A physical pendulum is one in which the mass is distributed throughout the body rather than concentrated at the bottom. The period of a physical pendulum is given by T = 2π √(I/mgh), where I is the moment of inertia of the pendulum, m is its mass, h is the distance between the center of mass and the pivot point, and g is the gravitational acceleration. In this case, the mass of the pendulum has an effect on its period because it affects the moment of inertia. However, this formula is only valid for physical pendulums and does not apply to simple pendulums, which have all their mass concentrated at the bottom.In summary, the mass of a pendulum has no effect on its period. Instead, the period of a pendulum is determined solely by its length and the gravitational acceleration acting on it.

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Sure, I can explain that to Billy Bob.

Billy Bob, the bowling ball and the balloon have the same size, but they have different masses. The bowling ball has a much greater mass than the balloon, which means that it has more inertia. Inertia is the tendency of an object to resist changes in its motion. The bowling ball has more inertia than the balloon, so it takes more force to stop it.

When you dropped the bowling ball and the balloon, they both started with the same initial velocity. However, the bowling ball's greater mass meant that it had more inertia, so it resisted the force of gravity more than the balloon. This caused the bowling ball to accelerate more slowly than the balloon.

As a result, the bowling ball took much longer to stop than the balloon.

Here's a simplified analogy: imagine that you have two cars, one that is very heavy and one that is very light. If you push them both forward with the same amount of force, the heavy car will accelerate more slowly than the light car. This is because the heavy car has more inertia than the light car.

I hope this explanation helps!

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The time submarine passes a marker that is 125 km from shore is 3.87 hr.

Speed is the directional velocity of an object in motion as a demonstration of its price of alternate in function as discovered from a particular frame of reference and as measured by way of a specific preferred time.

velocity is the top indicator of the placement in addition to the rapidity of the item. it may be described as the distance protected by way of an item in unit time. velocity may be defined as the displacement of the item in unit time.

velocity is the quickness of movement or movement. A synonym is a celerity; a less difficult phrase is pace. In physics, pace especially refers to the dimension of the price and route of an alternate in the function of an item.

calculation:-

velocity = displacement/time

             = 290 / 9

              = 32.22 km/hr

new distance = 125 km

velocity is constant = 32.22 km/hr

time = displacement/velocity

        = 125/32.22

         = 3.87 hr

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Testable hypotheses are the theoretical problems that operational definitions have converted into.

Scientific observation is an empirical research designed to systematically address issues about the world. Through the use of operational definitions, theoretical questions are converted into. a provable theory. The measurement process for measuring external, observable behaviour is specified in Operational Definitions. The measurements that are obtained are utilised to define and quantify the construct. A measurement process (a collection of operations) is specified in an operational definition for the purpose of measuring an external, observable behaviour, and the definition and measurement of the hypothetical construct are then based on the results of the measurement procedure. No matter how solid your conceptual definition may be, you cannot measure anything without an operational definition.

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Answer:

Displacement (km)

Explanation:

The y axis is the vertical axis pointing up and down. This is labeled as the the displacement (km) in the graph.

Answer:

Explanation:

The acceleration of an object given it's mass and the force acting on it can be found by using the formula

\(a = \frac{f}{m} \\ \)

f is the force

m is the mass

From the question we have

\(a = \frac{2.5}{0.55} \\ = 4.545454...\)

We have the final answer as

Hope this helps you