what will be the equilibrium temperature when a 215 g block of copper at 255 ∘c is placed in a 155 g aluminum calorimeter cup containing 845 g of water at 16.0 ∘c

Answer:

B.  10 m

Explanation:

f = v/λ = (20 m/s)λ / (5 m) = 4 Hz    original frequency

1/2(4 Hz) = 2 Hz   half the original frequency

(20 m/s) / λ = 2 Hz

λ = (20 m/s) / (2 Hz) = 10 m

The second wavelength would increase to 10 m

The stopping time will be 0.13 second required in order to safely stop a CEV .

Speed is distance travelled by the object per unit time. Due to having no direction and only having magnitude, speed is a scalar quantity With SI unit meter/second.

The average force acting on CEV is = 426000 N.

Mass of the  CEV is = 7250 kg.

Initial speed of the CEV  is =  7.65 m/s

Hence, deceleration of the CEV is = ( 426000 N ÷ 7250 kg) = 58.75 m/s²

Hence, required stopping time = 7.65 m/s ÷ 58.75 m/s² = 0.13 second.

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The present value of the following single amounts are as follows;

PV for FV = $20,000, I =7%, N =10 years is $10,155.84

PV for FV = $14,000, I =8%, N =12 years is $4,489.92

PV for FV = $25,000, I =12%, N =20 years is $2,590.11

PV for FV = $40,000, I =10%, N =8 years is $18,520.89.

Future value (FV) =$20,000,

Interest rate (I) =7%,Time (n) = 10 years

The present value (PV) can be calculated as follows;

PV = FV / (1 + i)n = 20000 / (1 + 0.07)10PV = 20000 / 1.96715PV = $10,155.84

Future value (FV) =$14,000,

Interest rate (I) =8%,

Time (n) = 12 years

The present value (PV) can be calculated as follows;

PV = FV / (1 + i)n = 14000 / (1 + 0.08)12PV = 14000 / 3.12159PV = $4,489.92

Future value (FV) =$25,000,

Interest rate (I) =12%,Time (n) = 20 years

The present value (PV) can be calculated as follows;

PV = FV / (1 + i)n = 25000 / (1 + 0.12)20PV = 25000 / 9.64632PV = $2,590.11

Future value (FV) =$40,000,Interest rate (I) =10%,Time (n) = 8 years

The present value (PV) can be calculated as follows;

PV = FV / (1 + i)n = 40000 / (1 + 0.1)8PV = 40000 / 2.15893PV = $18,520.89

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Answer:

a) The distance covered by the moving object is approximately 18.85 km

b) The magnitude of the displacement of the object is 0 (no displacement)

Explanation:

From the drawing, we have;

The sale of the drawing is 1 unit = 1 km

The radius of the circle in the drawing along which the object moves = 3 units

Therefore;

The radius of the circle along which the object moves, r = 1 km/unit × 3 units = 3 km

a) The distance covered by the object that moves from point A to B to C to D and finally to A is equal to the circumference of the circle

Therefore;

The distance covered by the moving object, d = 2·π·r

By pugging the value for r = 3 km

d = 2 × π × 3 km = 6·π km ≈ 18.85 km

The distance covered by the moving object, d ≈ 18.85 km

b) The displacement = The object's change in position

The initial position of the object = Point A

The final position of the object = Point A

Therefore, the displacement of the object, A = No displacement = 0 (No difference between the initial and final location of the object

We are unable to directly determine the work performed by the engine because the distance over which the force acts is unknown.

This indicates that the effort expended to increase the car's speed will be equivalent to the change in kinetic energy of the vehicle. Thus, 30 kJ of effort must be performed.

The work W is equal to the force f times the distance d, or W = fd, to mathematically describe this idea.

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Complete Question:

Light from the sun travels in electromagnetic waves. Which of these statements describe electromagnetic waves? Choose the 3 that apply.

Group of answer choices.

a) consist of transverse wave patterns.

b) can move through a vacuum.

c) caused by a vibration in a medium.

d) consist of longitudinal wave patterns.

e) requires a medium, such as air, to travel.

f) made of vibrating electric and magnetic fields.

Answer:

a) consist of transverse wave patterns

b) can move through a vacuum

f) made of vibrating electric and magnetic fields

Explanation:

Electromagnetic waves is a propagating medium used in all communications device to transmit data (messages) from the device of the sender to the device of the receiver.

Generally, the most commonly used electromagnetic wave technology in telecommunications is light and radio waves. Light from the sun travels in electromagnetic waves.

The statements which describe electromagnetic waves are;

I. It consist of transverse wave patterns.

II. It can move through a vacuum.

III. It is made of vibrating electric and magnetic fields.

a) The total distance a ball falls in 6 seconds is 576 feet.

b) The formula for the total distance a ball falls in n seconds is:
S_n = 16n * (n + 1) / 2

a. To find the total distance a ball falls in 6 seconds, we need to sum up the distances it falls during each second. Based on the given information, the distances are:
1st second: 16 ft
2nd second: 48 ft
3rd second: 80 ft
We can observe a pattern here: the distance increases by 32 ft each second (16, 48, 80, 112, 144, 176). So, the distances for the remaining seconds are:
4th second: 112 ft
5th second: 144 ft
6th second: 176 ft

Now, we can sum up these distances: 16 + 48 + 80 + 112 + 144 + 176 = 576 ft. Therefore, the total distance a ball falls in 6 seconds is 576 feet.

b. To find a formula for the total distance a ball falls in n seconds, we can notice that the sequence of distances forms an arithmetic progression with the first term a = 16 and the common difference d = 32. The formula for the sum of the first n terms of an arithmetic progression is:

S_n = n * (2a + (n - 1)d) / 2

In our case, S_n represents the total distance a ball falls in n seconds. Plugging in the values for a and d, we get:

S_n = n * (2 * 16 + (n - 1) * 32) / 2

Simplifying, the formula for the total distance a ball falls in n seconds is:

S_n = 16n * (n + 1) / 2

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The object is known as buleshift.

Object is a type of thing that can be seen or touch but it's is never alive .

When an object is moving to the  away from us, the light from the object is known as if the  redshift, and when an the  object is moving to the  towards us, the light from to  the object is known as of the  blueshift. Astronomers use by the  redshift and blueshift to deduce how far an object is away from Earth, in the  concept of key to charting by its  the universe's expansion.

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Answer:

Net flux through the surface is zero.

Explanation:

Recall that the net electric flux through a closed surface depends on the net charge enclosed inside that surface.

In our case, there are two point charges of exactly opposite charge (net charge - zero), which are located inside the Gaussian surface of radius "2 a" centered at the origin - both charges are located at a distance "a" from the origin of coordinates, therefore inside the Gaussian surface.

Then the net flux through the surface is also ZERO.

Answer:

an earthquake

Explanation:

the energy is being released

The number of significant figures in the calculation for the perimeter should match the least number of significant figures among the measurements, which is 2. Therefore, the calculation for the perimeter should be reported with 2 significant figures.

When performing calculations, it is important to consider the rules of significant figures. The rule states that the result of a calculation should be rounded to match the least number of significant figures in the given measurements.

In the given measurements, the least number of significant figures is 2, which is found in Side 3 (2.000 m). Therefore, when calculating the perimeter of the seven-sided figure, the result should be rounded to 2 significant figures.

For example, if the calculated perimeter is 41.756 meters, it should be rounded to 42 meters since 2 is the least number of significant figures. This ensures that the result aligns with the precision of the measurements provided.

By adhering to the rules of significant figures, we can maintain consistency and accuracy in our calculations and ensure that the level of precision is appropriate for the given data.

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What does your model look like and the one it's being compared to?

Answer:

you should prolly put the model

Explanation:

Answer:

D

Explanation:

Answer:

B

Explanation:

increasing the waters temperature

Answer:

4 m

Explanation:

\(v = f \times  λ\)

speed of sound wave (according to question)

= 1 × 1000 = 1000m/s

wavelength is represented by λ

therefore to find the wavelength, divide the speed by the frequency of the second wave given by the question

λ of another wave = 1000 ÷ 250 = 4 m

Speed of sound equals wavelength and frequency. The wavelength of the sound wave if the frequency is 250hz is 4 meters.  

Sound requires a medium to propagate in the form of vibration. It is the pattern of disturbance caused by the movement of energy particles propagating through the medium.

Sound waves can travel in the form of transverse and longitudinal waves. When the sound source continues to vibrate in the medium, the vibrations are propagated in the form of sound waves.

The sound waves travel at different speeds in different mediums. the speed of sound waves remains constant in the same medium. The speed of sound waves is directly proportional to wavelength and frequency.

Wavelength(λ) measures the distance between two crests/ two troughs in a wave and its SI unit is a meter. The frequency (f) of a wave is the number of waves that pass in a certain time and its unit is hertz(Hz). The SI unit of the speed sound wave is m/s.

From the givens,

wavelength(λ) = 1 meter.

frequency (f) = 1000hz.

Speed of wave(v) = wavelength × frequency

                              = 1 × 1000

                           v   = 1000 m/s.

speed of wave = 1000 m/s.

frequency = 250hz

wavelength(λ) = speed / frequency

                        = 1000 / 250

                        = 4 meters.

Hence, the wavelength(λ) of a 250 hz sound wave is 4 meters.

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(a) It can be stated that the 10-gram marble hits the ground first because it has a higher acceleration and travels faster.

(b) Both marbles will travel the same distance since their horizontal components of velocity and initial velocity with respect to the ground are the same.

According to the given statement, a 10-gram marble has a speed that is 5 times faster than that of a 100-gram marble. Both marbles roll off the table at the same time. The questions to answer are as follows:

(a) The acceleration due to gravity is constant at 9.8 m/s², according to Newton's Law of Gravitation.

According to the law of physics, heavier objects fall faster than lighter ones, but since the 10-gram marble has a speed that is five times faster than the 100-gram marble, it implies that the 10-gram marble covers more ground in less time than the 100-gram marble as acceleration is directly proportional to the force applied.

The time taken by both marbles to reach the ground is given byt = √(2h/g)where h is the height from which the marbles were dropped, and g is the acceleration due to gravity.

The height from which the marbles were dropped is the same in both cases, so it can be stated that the 10-gram marble hits the ground first because it has a higher acceleration and travels faster.

(b) The range traveled by both marbles is determined by the horizontal component of their velocity. It's worth noting that the horizontal components of their velocities are identical since they were launched from the same height, so there's no advantage for either marble.

The range of a projectile is determined by the formula:

R = u²sin(2θ)/g where R is the range, u is the velocity of the object, θ is the angle of the initial velocity with the horizontal, and g is the acceleration due to gravity.

Since the angle of the initial velocity with the horizontal is the same for both marbles, and their initial velocity is also the same, it can be stated that both marbles travel the same distance.

Therefore, both marbles will travel the same distance since their horizontal components of velocity and initial velocity with respect to the ground are the same.

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Answer: so basically, Newtons Law states that every particle attracts every other particle in the universe with a force which is directly proportional to the product of their masses and inversely proportional to the square of the distance between their centers.

Explanation: newtons law simplified in my opinion is a physical law that describes the attraction between two objects with mass.

hope this helps.

Answer:

Explanation:

she rieat

The wavelength of the photon is 377nm.

The Balmer series is the series that begins or ends at n=2. It is one of the series of the hydrogen spectrum.

Now;

1/λ = RH(\(\frac{1}{n_{2} ^{2} }\) - \(\frac{1}{n_{1} ^{2} }\))

λ = Wavelength

RH = Rydberg constant for hydrogen

\(n_{2\) = final energy level

\(n_{1}\) = initial energy level

1/λ = 1.097 * 10^7(1/2^2 - 1/12^2)

1/λ = 1.097 * 10^7(0.25 - 0.0069)

λ = 3.77 * 10^-7 m or 377nm

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(a) To calculate the Sun's flux at a distance of 58.5 million kilometers, we can use the inverse square law for radiation. By considering the known flux at a reference distance, we can determine the flux at the given distance.

(b) To determine the amount of matter that must be converted into energy to produce 11,118 billion joules, we can use Einstein's mass-energy equivalence equation, E = mc², where E is the energy, m is the mass, and c is the speed of light.

(c) To calculate the age of a radioactive sample with a given ratio of daughter atoms to parent atoms and a known half-life, we can use the formula for radioactive decay and solve for time.

(a) The Sun's flux follows the inverse square law, which states that the flux is inversely proportional to the square of the distance. If we know the flux at a reference distance, we can use the equation F₁/F₂ = (D₂/D₁)², where F₁ and F₂ are the fluxes at distances D₁ and D₂, respectively. Plugging in the values:

F₁/[(58.5 million km)²] = F₂/[(distance to the Sun)²],

we can calculate the Sun's flux at the given distance.

(b) To determine the mass that needs to be converted into energy, we can rearrange the equation E = mc² to solve for mass, which gives us m = E/c². Plugging in the values:

m = (11,118 billion joules) / (speed of light)²,

we can calculate the mass that must be converted into energy.

(c) The ratio of daughter atoms to parent atoms can be related to the decay constant λ, where λ = ln(2) / t₁/₂, and t₁/₂ is the half-life of the isotope. From the given ratio, we can calculate the decay constant. Then, using the formula N(t) = N₀ * e^(-λt), where N(t) is the number of parent atoms at time t, N₀ is the initial number of parent atoms, and e is Euler's number, we can solve for the time t, which represents the age of the sample.

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Answer:

ε = -0.0589V = -58.9mV

Explanation:

In order to calculate the induced emf in the coil, you use the following formula:

\(\epsilon=-N\frac{d\Phi_B}{dt}=-N\frac{d(SBcos\alpha)}{dt}\)         (1)

ε: induced emf = ?

N: turns of the coil = 28

ФB: magnetic flux trough the coil

S: cross sectional area of the circular coil = π.r^2

r: radius of the cross sectional area of the coil = 4.40cm = 0.044m

B: magnetic field

α: angle between the direction of the magnetic field and the direction of the normal to the cross area of the coil = 0°

You take into account that the area is constant respect to the magnetic field that cross it. Only the magnetic field is changing with time. The magnetic field depends on time as follow:

\(B(t)=0.010t+0.040t^2\)           (2)

You replace the expression (2) into the equation (1), evaluate the derivative, and replace the values of the other parameters for t =4.20s:

\(\epsilon=-NS\frac{dB}{dt}=-NS\frac{d}{dt}[0.010t+0.040t^2]\\\\\epsilon(t)=-NS(0.010+0.080t)\\\\\epsilon(t)=-(28)(\pi(0.044m)^2)(0.010T/s+0.080T/s^2(4.20s))\\\\\epsilon(t)=-0.0589V=-58.9mV\)

The induced emf in the coil is -58.9mV

The value of t, which represents the time it takes for the father to give the merry-go-round an angular velocity of 1.50 rad/s, is 38.4 seconds.

What is Velocity?

Velocity is a vector quantity that describes the rate of change of an object's position with respect to time. It includes both magnitude (speed) and direction. Velocity is typically represented by a vector with an arrow pointing in the direction of motion, and its magnitude is given in units of distance per time (e.g., meters per second, kilometers per hour, etc.). In physics, velocity is an important concept used to describe the motion of objects and is often used in calculations involving displacement, acceleration, and other kinematic quantities.

Rotational inertia (I) = 6400 kg·m² (from the example problem)

Angular velocity (ω) = 1.50 rad/s

Torque (τ) = 250 N·m (from the example problem)

Plugging in the given values into the formula, we get:

t = 6400 kg·m² * 1.50 rad/s / 250 N·m

t = 38.4 s

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Answer:

(a) The projectile takes approximately 4.420 seconds to reach the water, (b) The horizontal scope of the projectile is 1591.2 meters, (c) The remaining height to descend after 2 seconds of being launched is 63.624 meters.

Explanation:

The projectile experiments a parabolic motion, where horizontal speed remains constant and accelerates vertically due to the gravity effect. Let consider that drag can be neglected, so that kinematic equation are described below:

\(x = x_{o}+v_{o,x} \cdot t\)

\(y = y_{o} + v_{o,y}\cdot t +\frac{1}{2}\cdot g \cdot t^{2}\)

Where:

\(x_{o}\), \(y_{o}\) - Initial horizontal and vertical position of the projectile, measured in meters.

\(v_{o,x}\), \(v_{o,y}\) - Initial horizontal and vertical speed of the projectile, measured in meters per second.

\(t\) - Time, measured in seconds.

\(g\) - Gravitational acceleration, measured in meters per square second.

\(x\), \(y\) - Current horizontal and vertical position of the projectile, measured in meters.

Given that \(x_{o} = 0\,m\), \(y_{o} = 80\,m\), \(v_{o,x} = 360\,\frac{m}{s}\), \(v_{o,y} = 0\,\frac{m}{s}\) and \(g = -9.807\,\frac{m}{s^{2}}\), the kinematic equations are, respectively:

\(x = 360\cdot t\)

\(y = 80-4.094\cdot t^{2}\)

(a) If \(y = 0\,m\), the time taken for the projectile to reach the water is:

\(80 - 4.094\cdot t^{2} = 0\)

\(t = \sqrt{\frac{80}{4.094} }\,s\)

\(t \approx 4.420\,s\)

The projectile takes approximately 4.420 seconds to reach the water.

(b) The horizontal scope is the horizontal distance done by the projectile before reaching the water. If \(t \approx 4.420\,s\), the horizontal scope of the projectile is:

\(x = 360\cdot (4.420)\)

\(x = 1591.2\,m\)

The horizontal scope of the projectile is 1591.2 meters.

(c) If \(t = 2\,s\), the height that remains to descend is:

\(y = 80-4.094\cdot (2)^{2}\)

\(y = 63.624\,m\)

The remaining height to descend after 2 seconds of being launched is 63.624 meters.

Answer:

there is no picture :o?

Explanation:

:oo

Answer:

0.22 km/h

Explanation:

72 hours in 3 days

16/72 = 0.222222222

round to 0.22 km/h

For future reference, Distance/Time= Speed

Answer:

What is 27 °F in °C ?

-2.77778

As a result, 27 degrees Fahrenheit equals around -2.17 degrees Celsius.

Temperature is the degree to which a thing is hot or cold. Temperature is a measure of a system's average kinetic energy. As particles in a substance travel faster, their kinetic energy increases, raising the temperature of the system. Heat is defined as the energy exchanged when two bodies of differing temperatures come into contact. Temperature is a quantity that indicates a body's thermal condition (i.e., the degree of hotness or coldness of the body). When two bodies of differing temperatures come into touch, it defines the direction of heat transfer.

Here,

To convert from Fahrenheit to Celsius, use the following formula:

°C = (°F - 32) * 5/9

Plug in the value for °F:

°C = (27 - 32) * 5/9 = -3.89 * 5/9 = -3.89 * 0.5556 = -2.17 °C

So, 27 °Fahrenheit is equal to approximately -2.17 °Celsius.

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Answer:

B: C + O2 = CO2

Explanation:

In Chemistry,a synthesis reaction is one that occurs when two or more reactants combine in such a manner that they form a single product.

Looking at the options, the only one where 2 reactants combine to form a single product is option C where Carbon reacts with Oxygen to form carbon (IV) oxide.

The maximum possible thermal efficiency of the system is d. 67.9%.

By utilizing the physics of heat engines and Second Law of Thermodynamics, we can calculate that the maximum achievable efficiency of a heat engine with a hot reservoir at 515 k and a cold reservoir at 190 k is 67.9%.

This result serves as an upper limit for all practical engines, regardless of the specifics of their design or engineering capabilities.

Making this maximum efficiency is possible through improvements in technology and increased knowledge on thermodynamics and energy production.

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Answer: A.

63.1%

Explanation: edmentum

The Copernican Principle refers to the idea that there is nothing special about our place in the universe, and that everything in the universe revolves around the Sun, challenging the geocentric model.

The Copernican Principle is a foundational concept in astronomy and cosmology. It challenges the geocentric view by asserting that there is nothing special about our place in the universe. It proposes that everything in the universe, including celestial bodies and systems, revolves around the Sun. This heliocentric model, pioneered by Nicolaus Copernicus, marked a significant shift in our understanding of the cosmos. It introduced the idea that the Earth is not the center of the universe but rather a planet in orbit around the Sun. The Copernican Principle has since shaped our perception of the vastness and diversity of the cosmos, challenging previous geocentric beliefs.

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Explanation:

The relationship is directly proportional; as temperature increases, volume increases in the same way.

Charles's law states that at a constant pressure, the volume of fixed a mass of a gas is directly proportional to its absolute temperature or kelvin temperature.

Mathematically, this law can be written as follows;

\(V = kT\\\\where;\\k \ \ is \ a \ constant \\\\T \ is \ kelvin \ temperature\\\\V \ is \ the \ volume \ of \ the \ gas\)

This law explains the direct relationship between Volume of the gas and its Kelvin temperature. That is, as Temperature increases, the volume of the gas increases.

Thus, the correct statement is "The relationship is directly proportional; as temperature increases, volume increases in the same way".

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Answer:

The relationship is directly proportional; as temperature increases, volume increases in the same way.

Explanation:

I took the test.