Consider a sample of gas that contains 775 moles of smokestack gas. how many molecules of so2 are contained in this sample?
2.04 x 10 12

ANSWER

EXPLANATION

Parameters given:

Speed of electron, v = 4.10 * 10^3 m/s

Magnetic field, B = 1.45 T

Magnetic force, F = 1.40 * 10^(-16) N

To find the angle that the velocity of the electron makes with the magnetic field, apply the formula for magnetic force:

where θ = angle

q = electric charge = 1.6 * 10^(-19) C

Make θ the subject of the formula:

Therefore, the angle that the velocity makes is:

To find the second angle, subtract the angle from 180 degrees:

The angles are:

Answer:

There is no force in space.

Explanation:

Weight is the gravitational force acting on the mass as in space there is no gravity so weight appeares as zero

Answer:

It is because of gravity that your weight of a certain mass becomes zero in space.

Explanation:

The time of motion of the satellite is 1.65 hours.

The speed of the satellite from the center of the Earth is 26,945.35 km/h.

The time of motion of the satellite in hours is calculated as follows;

t = ( 99 min / 1 ) x ( 1 hour / 60 min )

t = 1.65 hours

The speed of the satellite from the center of the Earth in km/h is calculated as follows;

v = ( 2πr ) / ( t )

where;

The position of the satellite above the surface of the Earth = 705 km

The radius of Earth = 6,371 km

The total distance of the satellite from the center of the Earth = 705 km + 6,371 km = 7,076 km

v = ( 2π x 7076 ) / ( 1.65 )

v = 26,945.35 km/h

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The tennis ball takes approximately 0.582 seconds to reach its maximum height. The problem can be solved by putting the values of velocity, time and acceleration due to gravity in the formula of height.

To find the time it takes for the tennis ball to reach its maximum height, we can use the equation for vertical motion under constant acceleration, which is given by:

h = v0t - (1/2)gt^2

where h is the height, v0 is the initial velocity, t is the time, g is the acceleration due to gravity (9.8 m/s^2), and t is the time.

In this case, we know the initial height and velocity, so we can solve for the time it takes to reach the maximum height (when the velocity is equal to 0 m/s):

h = v0t - (1/2)gt^2

1.3 = 8.2t - (1/2)(9.8)(t^2)

Rearranging and solving for t, we get:

4.9t^2 - 8.2t + 1.3 = 0

t = 0.582 s

So it takes approximately 0.582 seconds for the tennis ball to reach its maximum height.

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With the use of formula, the frequency of the tuning fork is 13.6 Hz

A tuning fork can be used to determine the speed of sound in air using a resonance tube. The apparatus needed for this experiment are;

The experiment begins when a student holds a pipe vertically, with one end submerged in water while the opposite end is out in the air. Just above the pipe, the student holds a tuning fork. The student carefully moves the pipe up and down, varying the level of water inside of it, until they detect a strong resonant sound.

Given that the student detects this sound when the length of air inside of the pipe measures 56.25 cm, and then again when the length is 68.75 cm. Taking the speed of sound in air to be of 340. m s–1.

The parameters given are:

\(L_{1}\) = 56.25 cm

\(L_{2}\) = 68.75 cm

V = 340 m/s

The formula to use for this question is

V = 2F( \(L_{2}\) - \(L_{1}\) )

340 = 2F (68.75 - 56.25)

340 = 2 x 12.5 x F

340 = 25F

F = 340/25

F = 13.6 Hz

Therefore, the frequency of the tuning fork is 13.6 Hz

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Answer:5 min

Explanation: just is

Explanation:

see the attachment.. hope it will help you

Answer:

2+ charge

Explanation:  The alkaline earth metals have two valence electrons in their highest-energy orbitals (ns2). They are smaller than the alkali metals of the same period, and therefore have higher ionization energies. In most cases, the alkaline earth metals are ionized to form a 2+ charge

Hope this helps, have a great day :)

Answer:

B

Explanation:

for the motion every night, it is because the Earth spins on its axis.

for the changes over a year, this is because the Earth rotates around the sun.

for the changes over hundreds, thousands or millions of years, this is because the whole solar system (including the Earth, of course) rotates with all the other stars in our galaxy around the center of the galaxy. and each star system has its own orbit (similar to the planets in our solar system).

it is very rare to see objects outside of our galaxy without a telescope, but they change too over a long period of time, because our galaxy not only rotates by also moves through the universe, and these other objects move on their own too.

Answer:

b earth spins on its axis

Explanation:

Answer:

Q=21600C

Explanation:

Q=It.

Data

I=12A

t=30min

convert time from minutes to second

t=60*30

=1800s

Q=?

Q=It

=(12A)*(1800s)

Q=21600C

Answer:

Mass and Gravity

Explanation:

Objects with mass exert forces on each other via the force of gravity. This force is proportional to the mass of the two interacting objects and is inversely proportional to the square of the distance between them.

It is 15 meters from point A to point B. The measure of magnetic field strength is the tesla.

The portion of a material's magnetic field that results from an external current and is not intrinsic to the material itself is known as the magnetic field strength, also known as magnetic intensity or magnetic field intensity. It is measured in amperes per meter and represented as the vector H.

H is defined by the formula H = B/ M, where B is the magnetic flux density, which measures the real magnetic field present in a material as a concentration of magnetic field lines, or flux, per unit cross-sectional area; is the magnetic permeability; and M is the magnetization.

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The complete question is

If the strength of the magnetic field at A is 27 units and the strength of the magnetic field at B is 3 units, what is the distance to B?

a) 10 m

b) 225 m

c) 15 m

The radius of the arc of the teardrop at the top is 10.57 m, the total mass of the car and riders is given as M, the force exerted by the rail on the car at the top is F = 19.62M N (Newtons), and the centripetal acceleration at the top of the circular loop would be 9.64 m/s².

To find the radius of the arc of the teardrop at the top, we can use the given centripetal acceleration and speed. The centripetal acceleration is 2g, which is 2 times the acceleration due to gravity (g = 9.81 m/s²). So, the centripetal acceleration (ac) is 2 * 9.81 = 19.62 m/s². The speed (v) at the top is given as 14.4 m/s.

We can use the formula for centripetal acceleration: ac = (v²) / r, where r is the radius of the arc. Rearranging the formula to find r, we get r = (v²) / ac.
Substituting the values, we have r = (14.4 m/s)² / 19.62 m/s² = 10.57 m.
So, the radius of the arc of the teardrop at the top is 10.57 m.

To find the force the rail exerts on the car at the top, we can use the formula F = mac, where F is the force, m is the mass of the car and riders, a is the centripetal acceleration, and c is a constant equal to 1.
Substituting the values, we have F = M * 19.62 m/s².

Since the total mass of the car and riders is given as M, the force exerted by the rail on the car at the top is F = 19.62M N (Newtons).

If the roller coaster had a circular loop of radius 21.4 m and the cars have the same speed, 14.4 m/s at the top, we can find the centripetal acceleration using the formula ac = (v²) / r.
Substituting the values, we have ac = (14.4 m/s)² / 21.4 m = 9.64 m/s².
So, the centripetal acceleration at the top of the circular loop would be 9.64 m/s².

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The number of hydrogen atoms required to obtain 7.9 kg of hydrogen is approximately 4.78 x 10^26 atoms.

To calculate this, we can use the following steps:

1. Determine the mass of one hydrogen atom: 1.0 atomic mass unit (u).

2. Convert the mass of hydrogen from kilograms to atomic mass units by dividing 7.9 kg by the mass of one hydrogen atom (1.0 u).

3. Use Avogadro's number, which states that 1 mole of any substance contains 6.022 x 10^23 entities (atoms, molecules, etc.), to convert from atomic mass units to the number of hydrogen atoms.

4. Multiply the result obtained in step 2 by Avogadro's number to find the number of hydrogen atoms.

The answer, approximately 4.78 x 10^26 atoms, represents the number of hydrogen atoms required to obtain 7.9 kg of hydrogen.

In this calculation, we use conversion factors and Avogadro's number to relate the mass of hydrogen in kilograms to the number of hydrogen atoms.

By converting units and using the concept of moles, we can determine the quantity of atoms in a given mass of a substance.

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1. The energy required is 513 kJ to boil 0.60kg of ethanol.

2. The density of gold is  19,300 kg/\(m^3\) if it has a volume of 2.00 x \(10^-^5\)\(m^3\) and a mass of 0.386kh.

Question 1: The energy required to boil a substance can be calculated by multiplying the mass of the substance by its specific latent heat of evaporation. In this case, the specific latent heat of evaporation for ethanol is given as 855 kJ/kg, and the mass of ethanol to be boiled is 0.60 kg.

Energy required = Mass × Specific latent heat of evaporation

Energy required = 0.60 kg × 855 kJ/kg

Energy required = 513 kJ

Therefore, the energy required to boil 0.60 kg of ethanol is 513 kJ.

Question 2: The density of a substance is calculated by dividing its mass by its volume. In this case, the volume of the gold is given as 2.00 x\(10^-^5\) \(m^3\) and the mass of the gold is 0.386 kg.

Density = Mass / Volume

Density = 0.386 kg / 2.00 x \(10^-^5\) \(m^3\)

Density = 19300 kg/\(m^3\)

Therefore, the density of gold is 19300 kg/\(m^3\).

In summary, the energy required to boil 0.60 kg of ethanol is 513 kJ, and the density of gold is 19300 kg/m^3.

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Galileo’s telescopic discoveries of the moons of Jupiter are often mentioned. But they did not amount to proof that the Ptolemaic system was incorrect.

It's hard to tell you how big a shakeup this caused in astronomy at the time. Thanks to Galileo, we now knew that planets weren't perfect, ethereal lights in the sky. That things could orbit them, same as (most astronomers thought) things did around Earth, making Earth less special, and providing evidence that maybe that heliocentric theory wasn't that out there.

Basically, before Galileo, astronomers were looking at an unchanging, heavenly firmament, separate from Earth by its very heavenly nature.

After, they were studying planets - actual worlds like ours - and moons and the physical (as opposed to heavenly) reality of their place in the universe.

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Refraction occurs when a light ray passes from one medium to another with a different refractive index. Therefore, option 3 is the correct answer.

A) Refraction occurs when a light ray passes from one medium to another with a different refractive index. The angle of incidence is the angle between the incoming light ray and the normal, while the angle of refraction is the angle between the refracted light ray and the normal. According to the laws of refraction, the angle of incidence and the angle of refraction are related by the ratio of the refractive indices of the two media. In situations where the angle of incidence is greater than the critical angle, total internal reflection occurs instead of refraction.
Looking at the four situations depicted in the drawing, we can see that only situation 1 shows a possible refraction. This is because the angle of incidence is smaller than the angle of refraction, which indicates that the refracted ray bends away from the normal, as expected based on the relative refractive indices of the two media. In situations 2, 3, and 4, the angle of incidence is larger than the angle of refraction, which violates the laws of refraction and is therefore not physically possible.
B) Total internal reflection occurs when a light ray travels from a medium with a higher refractive index to a medium with a lower refractive index, and the angle of incidence is greater than the critical angle. The critical angle is the angle of incidence at which the angle of refraction is 90 degrees. If the angle of incidence exceeds the critical angle, the light ray is reflected back into the original medium instead of refracting into the second medium.
Without doing any calculations, we can see that option 3 shows a pair of refractive indices where total internal reflection is not possible. This is because the refractive index of medium B is 1.00, which is the lowest possible value for a refractive index. If medium A has a higher refractive index than 1.36, then the critical angle will be smaller than 45 degrees, and total internal reflection will not occur. Therefore, option 3 is the correct answer.

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a. The probability that a randomly selected soda can has a volume less than 12 fluid ounces is approximately 0.3085

b. The probability that the sample mean volume is less than 12 fluid ounces, when a sample of size n = 32 is taken, is approximately 0.0023

c. The distribution of the sample mean becomes narrower and more concentrated around the population mean. Consequently, the probability of obtaining a sample mean less than 12 fluid ounces decreases because the sample mean is less likely to deviate significantly from the population mean.

a) Let X be the volume of a randomly selected soda can. We are given that the mean (μ) is 12.01 fluid ounces and the standard deviation (σ) is 0.02 fluid ounces.

We need to calculate P(X < 12). To do this, we standardize the variable using the z-score formula:

z = (X - μ) / σ

Substituting the given values, we have:

z = (12 - 12.01) / 0.02

= -0.5

Now, we can use a standard normal distribution table or calculator to find the probability associated with the z-score of -0.5. From the table, we find that the probability is approximately 0.3085.

b) When a sample of size n = 32 soda cans is drawn randomly from the population, the mean volume of the sample (denoted by X-bar) follows a normal distribution with the same mean (μ = 12.01 fluid ounces) but a smaller standard deviation (σ-bar) given by:

σ-bar = σ / sqrt(n)

Substituting the values, we have:

σ-bar = \(0.02 / \sqrt{(32)\)

= 0.02 / 5.6569

≈ 0.00354

Now, we need to calculate P(X-bar < 12). Again, we standardize the variable using the z-score formula:

z = (X-bar - μ) / σ-bar

Substituting the given values, we have:

z = (12 - 12.01) / 0.00354

≈ -2.8249

Using the standard normal distribution table or calculator, we find that the probability associated with the z-score of -2.8249 is approximately 0.0023.

c) As larger and larger sample sizes are taken, the probability that the sample mean volume is less than 12 fluid ounces tends to decrease. This is because as the sample size increases, the sample mean becomes a better estimate of the population mean. The larger the sample size, the more reliable and representative the sample mean is of the true mean. Hence, the sample mean is more likely to be closer to the population mean.

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Jack and jill travel up a hill at a speed of 2 mi/h. They travel back down the hill at a speed of 4 mi/h. Their average speed for the entire trip is 8/3 mi/h

The average speed is the total distance traveled by the object in a particular time interval. The average speed is a scalar quantity

Let x be the distance of hill from one side.

⇒ Distance for round trip = 2x

Let t1 and t2 be the time taken by them when going and returning back respectively.

Total time taken for round trip = t1+ t2

we have,

speed = distance/ time

⇒time = distance/speed

so, t1 = x/2

t2= x/4

Average speed for round trip = total distance/ total time

\(average speed = \frac{2x}{ \frac{x}{2} + \frac{x}{4} } \)

= 8/3 mi/h

therefore, Their average speed for the entire trip is 8/3 mi/h.

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The mass of a car can significantly affect the distance it travels when subjected to a given braking force. The braking force is the force that is applied to a car's brakes to bring it to a stop.

When a car is subjected to a braking force, the force acts to slow down or stop the car's motion. The mass of the car determines how much force is needed to achieve a given deceleration.

The greater the mass of the car, the more force is required to achieve the same deceleration. This means that a car with a greater mass will travel a longer distance before coming to a stop when subjected to a given braking force, compared to a car with a lower mass.

Therefore, it is important to consider the mass of a car when designing its braking system, to ensure that it is capable of providing sufficient force to achieve the desired deceleration and stopping distance.

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Full Question: How does the mass of a car affect the distance it travels when subjected to a given braking force?

Answer:

A) The ball will roll forever in a straight path.

Answer:

Vf = 126,85 m/s

Explanation:

En este caso, vamos a asumir que la velocidad inicial de la moneda cuando se deja caer es cero, puesto que no nos lo indican. Al ser la velocidad inicial cero, lo unico que influye en la velocidad de la moneda es la gravedad y la altura, por ende, la siguiente formula nos ayudará a calcularla:

Vf² = Vo² - 2gh   (1)

Pero como la velocidad inicial es cero, y si también asumimos que la dirección de bajada será nuestro eje positivo, entonces:

Vf² = 2gh   (2)

Ahora solo nos queda, reemplazar los valores de altura que es 821 m, y la aceleración de gravedad que es 9.8 m/s² y resolvemos la velocidad:

Vf² = 2 * 9,8 * 821

Vf = √16091,6

Esta debería ser la velocidad con que llega al suelo.

Exitos

La magnitud de la velocidad con la que choca con el suelo es aproximadamente 126.898 metros por segundo.

Si despreciamos los efectos de la viscosidad del aire y la aceleración de Coriolis, entonces el movimiento de la moneda se describe por el movimiento de caída libre, es decir, un movimiento uniforme acelerado debido a la gravedad terrestre. La velocidad final de la moneda es determinada por la siguiente ecuación cinemática:

\(v = \sqrt{v_{o}^{2}+2\cdot a\cdot h}\) (1)

Donde:

Si sabemos que \(v_{o} = 0\,\frac{m}{s}\), \(a = 9.807\,\frac{m}{s^{2}}\) y \(h = 821\,m\), entonces la velocidad final de la moneda es:

\(v = \sqrt{\left(0\,\frac{m}{s} \right)^{2}+2\cdot \left(9.807\,\frac{m}{s^{2}} \right)\cdot (821\,m)}\)

\(v\approx 126.898\,\frac{m}{s}\)

La magnitud de la velocidad con la que choca con el suelo es aproximadamente 126.898 metros por segundo.

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Answer:

1)  energy = 15.6 kWh,  2)    total_cost = $ 2.03

Explanation:

1) The energy dissipated is the product of the power and the time of use In a month it was used t = 6.5 h and the power of the toaster is

P = 2400 W = 2,400 kW

       energy = P  t

       energy = 2,400  6.5

        energy = 15.6  kWh

using rounding to a decimal

        energy = 15.6 kWh

2) The cost of energy is unit_cost = $ 0.13 / kWh

so the total cost

         total_cost = energy    unit_cost

         total_cost = 15.6   0.13

         total_cost = $ 2.028  

rounding to two decimal places

         total_cost = $ 2.03

Curling is a sport played with 20 kg stones that slide across an ice surface. Suppose a curling stone sliding at 1 m/s strikes another, stationary stone and comes to rest in 2 ms. The force on the stone during the impact is option (D) 10,000 N.

To calculate the force on the curling stone during the impact, we can use the impulse-momentum theorem, which states that the impulse of a force on an object is equal to its change in momentum. We can assume that the two stones are of equal mass (20 kg), since the problem does not provide any information to suggest otherwise. Let's call the initial velocity of the moving stone "v" and the final velocity (0 m/s, since it comes to rest) "u". The change in velocity is therefore:

Δv = u - v = 0 - 1 = -1 m/s

The time taken for the stone to come to rest is given as 2 ms, which is equal to 0.002 s. Using the formula for impulse, J = Δp = mΔv, we can calculate the impulse of the force acting on the stone:

J = (20 kg) x (-1 m/s) = -20 Ns

Since the force is applied for a time of 0.002 s, we can calculate the force using the formula for average force:

F = J / t = (-20 Ns) / (0.002 s) = -10,000 N

The negative sign indicates that the force is in the opposite direction to the motion of the stone. Therefore, the approximate force on the stone during the impact is 10,000 N, which is answer choice D.

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Explanation:

I think it will increase a little bit ... just image ... if the temperature is 0, the velocity will be 0 too. because the vibration of atom is so weak and the sound cant progation.

Answer:

The velocity will increase.

Explanation:

Wave velocity and the temperature of the medium are directly proportional so if the temperature increases, the velocity will increase.

Answer: 63.43 m

Explanation:

Given

Car lands 68.38 m away from the base of the garage

Stuntman drove the car with speed \(u=19\ m/s\)

Since there is no acceleration in the horizontal direction, so there is no change in velocity

\(\Rightarrow 68.38=19\times t\\\Rightarrow t=3.598\ s\)

time taken to cover 68.38 m is 3.598 s

In this time car travels a vertical distance of h

Such that we can write

\(\Rightarrow h=u_vt+\frac{1}{2}at^2\\\\\Rightarrow h=\frac{1}{2}gt^2\\\\\Rightarrow h=0.5\times 9.8\times (3.598)^2=63.43\ m\)

Answer:

Respect the client’s decision

Explanation:

just took the test

Answer: Respect the client's decision

Explanation: Either way the professional would know not to do anything rash and it is the client's decision whether or not they want to move forward, it would have obviously been a touchy subject if they were that reluctant.

Given: No. of fans = 5

           Current (I)= 0.8A

           Voltage (V) 220V

To find:   Total power P

Solution:  We know that P=VI

  Therefore for one fan P= 0.8*220

                                         = 176 W

Total Power for 5 fans = 176*5

                                      = 880W

Answer:

brush

Explanation:

its correct

Answer:

B. Brush

Explanation:

Edg 2021