680 J of heat are added to 56g of water initially at 20°
C.
1. How much energy is this in calories?
2. what is the final temperature of the water? ( In C°)

Answer:

a) La frecuencia de la luz emitida es 5,0 × 10¹⁴ Hz

b) El número de fotones por segundo que emite la fuente es 2.26380924 × 10²⁰ fotones

c) Las respuestas del inciso a) yb) son diferentes

Explanation:

Los parámetros dados son;

La potencia de la fuente de luz, P = 75 W

La energía consumida cada segundo por la fuente de luz, E = 75 J

La longitud de onda de la luz emitida, λ = 600 nm

a) La relación entre la energía y la frecuencia de la luz se da a continuación;

υ = c/λ

E = n·h·υ

\(E = \dfrac{h \times c}{\lambda}\)

Dónde;

E = La energía consumida por segundo = 75 J

h = constante de Planck ≈ 6.626 × 10⁻³⁴ J · s

υ = La frecuencia de la luz

λ = La longitud de onda de la luz = 600 nm

c = La velocidad de la luz, c = 3.0 × 10⁸ m / s

Por lo tanto, tenemos;

υ = c / λ = 3,0 × 10⁸ m / s / (600 nm) = 5,0 × 10¹⁴ Hz

∴ La frecuencia de la luz emitida, υ = 5.0 × 10¹⁴ Hz

b) El número de fotones por segundo que emite la fuente, 'n', se da como sigue;

n = E / (h · υ) = 75 J / (6.626 × 10⁻³⁴ J · s × 5.0 × 10¹⁴ Hz) = 2.26380924 × 10²⁰

El número de fotones por segundo que emite la fuente = n = 2.26380924 × 10²⁰ fotones

c) Las respuestas del inciso a) yb) son diferentes

5.0 × 10¹⁴ Hz ≠ 2.26380924 × 10²⁰ fotones.

Answer:

ok

Explanation:

The coefficient of restitution can be calculated from the initial and final heights of the ball after the collision.

The coefficient of restitution (e) is defined as the ratio of the relative speed after the collision to the relative speed before the collision. In this case, the relative speed before the collision is equal to the speed of the ball just before it hits the floor, and the relative speed after the collision is equal to the speed of the ball just after it leaves the floor.

Let's call the initial speed of the ball just before it hits the floor \($v_1$\). After the ball hits the floor, it will lose some energy and rebound with a speed \($v_2$\). The coefficient of restitution is then given by the following equation:

\($e = \frac{v_2}{v_1}$\)

We can use the energy conservation principle to relate the initial height \($h_1$\) to the initial speed \($v_1$\) and the final height \($h_2$\) to the final speed \($v_2$\). The initial potential energy of the ball is given by \($mgh_1$\), where \($m$\) is the mass of the ball and \($g$\) is the acceleration due to gravity. The final kinetic energy of the ball is given by \($\frac{1}{2}mv_2^2$\).

Since the total energy of the system is conserved, we have:

\($mgh_1 = \frac{1}{2}mv_2^2$\)

Dividing both sides by \($m$\) and solving for \($v_2$\), we get:

\($v_2 = \sqrt{2gh_1 - 2gh_2}$\)

Finally, using the equation for the coefficient of restitution, we get:

\($e = \frac{v_2}{v_1} = \frac{\sqrt{2gh_1 - 2gh_2}}{\sqrt{2gh_1}}$\)

So, the coefficient of restitution can be calculated from the initial and final heights of the ball after the collision.

Learn more about Collision:

https://brainly.com/question/2795148

#SPJ4

When the roller coaster moves downwards, kinetic energy is created due to the speed and mass of the roller coaster

(rlly just guessing what this question relates to so take this with a grain of salt)

Answer: True

Explanation:

Answer:

There is no net force on the airplane.

Explanation:

correct answer for khan

Given that two identical blocks of iron, at temperatures T₁ and T₂ (such that T₁ < T₂), are brought into thermal contact and neglecting volume changes and assuming that the specific heat Cp is constant.The final temperature (T) of the combined blocks of iron can be calculated using the equation of heat transfer given by:

As the blocks of iron are identical, the masses (m) and specific heat capacities (c) of the two blocks are the same.Let the final temperature of the blocks be T. Then, the change in temperature of the first block is ΔT₁ = T - T₁ and the change in temperature of the second block is ΔT₂ = T - T₂.According to the principle of conservation of heat, the total amount of heat gained by one block is equal to the total amount of heat lost by the other block. Therefore,mcΔT₁ = - mcΔT₂As the masses and specific heat capacities of the blocks are the same,m(T - T₁) = -m(T - T₂)⇒ T = (T₁ + T₂)/2Therefore, the final temperature of the combined blocks of iron is T = (T₁ + T₂)/2.

Iron is a chemical element with the symbol Fe and atomic number 26. Iron is a metal in the first transition series. Iron is the most common element on Earth by mass, making up most of Earth's outer and inner core. Iron is the fourth most abundant element in the earth's crust. Properties of iron Strong and malleable Resistant to fire High melting point Easy to rust Chemical properties are changes that an object undergoes to form a new substance Chemical properties of iron easily corrode Physical properties are changes that an object undergoes without forming a new substance Physical properties

Learn More About Iron at https://brainly.com/question/14964747

#SPJ11

The decay of uranium isotopes is used to provide information about the age of earth.

Answer:

1 Unit Electricity is the amount of electrical energy consumed by a load of 1 kW power rating in 1 hour..

Explanation:

Answer:

2400 J

Explanation:

Latent heat: This is also called hidden heat, it is the heat that is not detectable by the thermometer.

From the question,

Q = cm.................. Equation 1

Where Q = Energy, c = specific latent heat of the liquid, m = mass of the liquid.

Given: c = 4000 J/kg, m = 600 g =( 600/1000) kg = 0.6 kg

Substitute these values into equation 1

Q = 4000×0.6

Q = 2400 J

Hence the energy required is 2400 J

0.254 g x (1 g/ml) = 0.254 ml

Answer:

true

Explanation:

Answer:

Wavelength is the distance fromone crest to another or from one troughtto another of a wave is called wavelength.

Answer:

Either C or D.

Explanation:

Either one of them.

Answer:

They subtract the atomic number from the atomic mass

Hope this helps

Please mark as the brainliest

The effect that changing plate separation and surface area has on your capacitor is that if the distance between the plates is increased then the capacitance of the capacitor will decrease. If the distance between the plates is decreased, then the capacitance of the capacitor will increase.

Similarly, if the surface area of the plates is increased, the capacitance of the capacitor will increase. If the surface area of the plates is decreased, the capacitance of the capacitor will decrease.The addition of a dielectric effect the capacitance by increasing the capacitance of the capacitor by a factor equal to the dielectric constant. The capacitance of the capacitor is given by the formula C = Kε0A/d  Therefore, the capacitance of the capacitor increases.Charge Q is stored on a capacitor in such a way that there is an equal and opposite charge on each plate. If the magnitude of the charge on one plate is q, then the magnitude of the charge on the other plate is -q.

The capacitance of a parallel-plate capacitor is given by the formula:C = ε0A/dWhere:C = capacitance of the capacitorε0 = permittivity of free spaceA = area of the platesd = distance between the platesIf the distance between the plates is increased, then the capacitance of the capacitor will decrease. If the distance between the plates is decreased, then the capacitance of the capacitor will increase.If the voltage across the equivalent capacitor is 3V, the charge on the equivalent capacitor is given by:Q = CeqV = (0.2F)(3V) = 0.6CIf the charge on the equivalent capacitor is 0.6C, the charge on capacitor C2 is given by:q2 = C2V = (0.05F)(3V) = 0.15CIf the charge on the equivalent capacitor is 0.6C, the charge on capacitor C3 is given by:q3 = C3V = (0.15F)(3V) = 0.45CTherefore, the capacitor that stores less charge is capacitor C2, because its capacitance is smaller than the capacitance of capacitor C3.

To know more about capacitor  visit :-

https://brainly.com/question/31627158

#SPJ11

If raindrops fall vertically at 4.5 m/s with respect to the earth, their velocity in a straight line would be 22.4555 m/s.

Per second in meters the most used units of speed are meters per second (m/s), kilometers per hour (km/h), and miles per hour (mph) (mph). The distance an object goes in one unit of time is its speed. Speed equals distance times time is the speed formula.

A particle or object moves with respect to time when moving at a certain speed, which is expressed vectorially as velocity. Meters per second (m/s) is the commonly used unit for measuring velocity magnitude, also known as speed. A different way to indicate velocity magnitude is with the centimeter per second (cm/s) unit.

To know more about velocity visit:

brainly.com/question/11679227

#SPJ1

The work done by the force field on a particle that moves along the parabola is 7/3 + (e²-e)/2

The work done is defined as the magnitude of the displacement d multiplied by the force component acting in the direction of the displacement.

Work done = \(\int\limits^0_C {F} \, dr\)

dr = dxi  + dyj

Given,

F(x,y) = x²i + yeˣj

Work done =   \(\int\limits^0_C\)(x²i + yeˣj)×(dxi  + dyj)

=   \(\int\limits^0_C\)x²dx + yeˣdy

As, C: x = y² + 1

y = \(\sqrt{x-1}\)

dy = \(\frac{dx}{2\sqrt{x-1} }\)

Now substitute the values of y and dy:

Work done =   \(\int\limits^0_C\)x²dx + \(\sqrt{x-1e^{x} }\) × \(\frac{dx}{2\sqrt{x-1} }\)

=  \(\int\limits^0_C\)x² + ¹/₂ eˣ dx

Now, work done = \(\int\limits^1_2 {x^{2} }\) +  ¹/₂ eˣ dx

= [x³/3 + ¹/₂ eˣ]²₁

= [2³/3 + ¹/₂ e²] - [1³/3 + ¹/₂ e¹]

= 8/3 + ¹/₂ e² - 1/3 + e/2

= 7/3 + (e²-e)/2

To know more about work done visit:

https://brainly.com/question/28790713

#SPJ4

Complete question is as follows:

Find the work done by the force field F(x,y) = x²i + yeˣj on a particle that moves along the parabola x=y²+1 from (1, 0) to (2, 1)

Answer:

the bonds that are formed

Explanation:

Energy is absorbed in order to break bonds.  Energy is released when new bonds are formed. Bond-making is a process of exothermic. Whether the reaction is endothermic or exothermic refers to the difference between the energy needed to break bonds and the energy released when new bonds are formed.

A 5,560 kg lander (weight does not include fuel) must travel to the surface of the moon and back, requiring a delta-v (change in speed) of 18.7 kilometers per second. If the specific impulse (exhaust velocity, ve) of the rocket is 4.13 kilometers per second, approximately 4,683 kg of fuel will be necessary for the lander to travel to the surface of the moon and back.

According to the Rocket Equation, the amount of fuel necessary can be calculated using the formula:

m_fuel = m0 × (1 - e^(-Δv / ve)),

where:

m_fuel is the mass of the fuel required,

m0 is the initial total mass of the lander (including fuel),

Δv is the change in velocity (delta-v) required for the mission,

ve is the exhaust velocity (specific impulse) of the rocket.

In this case, we have:

m0 = 5,560 kg,

Δv = 18.7 km/s,

ve = 4.13 km/s.

Substituting the given values into the equation, we can calculate the mass of the fuel required:

m_fuel = 5,560 kg × (1 - e^(-18.7 km/s / 4.13 km/s)).

Using a calculator or a mathematical software, we find:

m_fuel ≈ 4,683 kg.

Therefore, approximately 4,683 kg of fuel will be necessary for the lander to travel to the surface of the moon and back, considering the given values for the initial mass, delta-v, and specific impulse.

To learn more about fuel visit: https://brainly.com/question/79954

#SPJ11

At latitude 50 degrees N, the celestial equator will cross the meridian at an altitude of 50 degrees in the north.

At latitude 50 degrees N, the celestial equator crossing the meridian refers to the moment when the celestial equator (an imaginary circle projected onto the celestial sphere) intersects the observer's meridian (a line passing through the zenith and the celestial poles). The altitude of an object in the sky is the angle between the object and the observer's horizon. In this case, we are interested in the altitude of the celestial equator at the moment of crossing the meridian.

Given the latitude of 50 degrees N, which is above the equator, the celestial equator will appear to be lower in the sky when crossing the meridian. Since the celestial equator is inclined to the celestial poles at an angle equal to the observer's latitude, which is 50 degrees in this case, the altitude of the celestial equator at the moment of crossing the meridian will be equal to the observer's latitude. Therefore, at latitude 50 degrees N, the celestial equator will cross the meridian at an altitude of 50 degrees in the north.

Learn more about latitude here:

https://brainly.com/question/14833692

#SPJ11

Answer:

It will take 9 hours

Explanation:

If a car travels 100 km per hour and 900 km is divided by 100 it will take 9 hours to travel.

The lateral area of the prism is 98 square inches and the surface area is 122 square inches.

To find the lateral area and surface area of a right rectangular prism with height 7 inches, length 3 inches, and width 4 inches, we can use the following formulas:

Lateral area = 2h(l + w)

Surface area = 2lw + 2lh + 2wh

Plugging in the given values, we get:

Lateral area = 2(7)(3 + 4) = 2(7)(7) = 98 square inches

Surface area = 2(3)(4) + 2(3)(7) + 2(4)(7) = 24 + 42 + 56 = 122 square inches

Therefore, the lateral area of the prism is 98 square inches and the surface area is 122 square inches.

Learn more about prism

brainly.com/question/12649592

#SPJ11

Answer:

Explanation:

You didn't ask a question here, but I assume you want the pressure? You can use the ideal gas equation stating that:

PV = nRT

The 'P' is pressure, the 'V' is volume, the 'n is number of moles of gas, the 'R' is the ideal gas constant, and the 'T' is the temperature. First convert the Celsius degrees into Kelvin by using the following relation:

C + 273.15 = K

4 + 273.15 = 277.15K

Now, find the volume of a cylinder by using:

\(V=\pi r^2l\)

The 'l' is the length of the cylinder

Now just plug and chug everything into the ideal gas equation:

\(PV=nRT\)

\(P(\pi r^2l)=(5moles)(8.3145J/moles*K)(277.15K)P=\frac{11.52J}{\pi r^2l}\)

Answer:

Option (3)

Explanation:

Formula used to calculate acceleration is,

F = ma

Where F = force exerted on a mass

m = mass

a = acceleration due to force exerted on the mass

Option (1),

When F = 100 N and m = 100 kg

100 = 100a

a = 1 m per sec²

Option (2)

For F = 1 N and m = 100 kg

1 = 100a

a = \(\frac{1}{100}\)

a = 0.01 m per sec²

Option (3)

For F = 100 N and m = 1 kg

100 = 1(a)

a = 100 m per sec²

Option (4)

For F = 1 N and m = 1 kg

1 = 1(a)

a = 1 m per sec²

Therefore. acceleration in Option (3) is the maximum.

The mass is undergoing to the greatest amount of acceleration is 1 kg subjected to a force of 100 N.

The given parameters:

The acceleration of each of the given masses is calculated by applying Newton's second law of motion as follows;

\(F = ma\\\\\a = \frac{F}{m}\)

When mass = 100 kg and force = 100 N, the acceleration is calculated as;

\(a = \frac{100}{100} \\\\a = 1 \ m/s^2\)

When mass = 100 kg and force = 1 N, the acceleration is calculated as;

\(a = \frac{1 }{100} \\\\a = 0.01 \ m/s^2\)

When mass = 1 kg and force = 100 N, the acceleration is calculated as;

\(a = \frac{100}{1} \\\\a = 100 \ m/s^2\)

When mass = 1 kg and force = 1 N, the acceleration is calculated as;

\(a = \frac{1}{1} \\\\a = 1 \ m/s^2\)

Thus, the mass is undergoing to the greatest amount of acceleration is 1 kg subjected to a force of 100 N.

Learn more about Newton's second law of motion here: https://brainly.com/question/25545050

The two attractive forces (a) Ion-dipole and (d) Dipole-dipole are all involved in the formation of a solution of kbr in water.

Water is most frequently used for drinking purposes. Two moles of hydrogen and one mole of oxygen make up dihydrogen monoxide, which is what it is. The object is liquid and is at room temperature. Water's chemical formula is H2O, which means that each of its molecules consists of two hydrogen atoms and one oxygen atom.

Because of the limited surface area of our lungs and the fact that the lining of our lungs is designed to handle air rather than water, humans are unable to breathe underwater. There are people (Bajau Laut, sea nomads) that can hold their breath underwater for longer periods of time (up to a few minutes). Biologically speaking, it is not possible to adapt (or devolve) to living underwater in a short amount of time.

Ion-dipole interaction: This is the association of a polar solvent molecule with a solution ion (K+ or Br-) (H2O). An ion-dipole interaction occurs when an ion's positive or negative charge attracts the solvent molecule's partial positive or negative charge.

The polar solvent molecules (H2O) in the solution engage in a dipole-dipole interaction. A dipole-dipole interaction occurs when one solvent molecule's partial positive charge is drawn to another solvent molecule's partial negative charge.

To know more about H2O visit:

https://brainly.com/question/4016176

#SPJ4

The minimum working space on a circuit that is 120 volts-to-ground, with exposed live parts on one side and no live or grounded parts on the other side of the working space, is 3 feet.

Individual electronic components such as resistors, transistors, capacitors, inductors, and diodes are connected by conductive wires or traces through which electric current can flow to form an electronic circuit. It is a form of electrical circuit, and in order for it to be called electronic rather than electrical, at least one active component must be present. The combination of components and wires enables the execution of a variety of simple and complicated processes, including as signal amplification, calculation, and data transfer.

To learn more about circuit visit:

https://brainly.com/question/24059031

#SPJ4

Answer:

The aeroplane flew 4200 miles for 7 hours.

600 times 7 is 4200.

Many bird wings are more convex on the upper surface than they are on the lower surface, this enables the wing to provide greater lift because A. air moves more slowly over the top surface of the wing than over the lower surface.

This difference in air pressure leads to the creation of an upward force called lift that counteracts the force of gravity on a bird's wings to keep it aloft.The upper surface of the bird's wings has a more curved shape and a higher angle of attack than the lower surface. Due to this shape, the air moves faster over the wing's surface, which results in a lower pressure zone above the wing.

Meanwhile, the air below the wings moves slower and thus, there's a higher pressure zone below the wing. The difference in pressure creates a lifting force that helps the bird to fly. In summary, the more convex shape of the upper surface of a bird's wing creates a lower air pressure zone above it and a higher air pressure zone below it, thus providing greater lift that enables the bird to fly and glide. So the correct answer is  A. air moves more slowly over the top surface of the wing than over the lower surface.

Learn more about force at

https://brainly.com/question/29762388

#SPJ11

Whenever the brakes are applied fully, a vehicle going at 50 mph experiences a steady deceleration rate 42 ft/s2, covering 64.05 feet before coming to a halt.

Use the formula d = st, or length equals speed times time, to find the distance. Since both represent a certain amount of distance per unit of time, such as miles an hour or kilometers an hour, rate and speed are comparable.

Initial speed is u=50 mi/h=50×1.467=73.35ft/s.

Vehicle deceleration is, a=-42ft/s²

Use of both the second kinematics equation for motion is as follows:

v²=u²+2as

Here, s denotes the traveled distance, while v is the ultimate speed. Since the automobile eventually stops, v = 0.

0²=73.35²+2(-42)×s

84=73.35²

To know more about distance visit:

brainly.com/question/7109333

#SPJ4