A simple harmonic oscillator takes 12.0s to undergo five complete vibrations. Find(c) the angular frequency in radians per second.

Balanced chemical equation: Na_2CO_3(aq) + CaCl_2(aq) → 2NaCl(aq) + CaCO_3(s)b)

Calculate the number of moles of CaCl_2:0.300 mol/L × 0.030 L = 0.009 mol of CaCl_2

Number of moles of Na_2CO_3: 0.800 g ÷ 105.99 g/mol = 0.0075 mol

Since the stoichiometry of the reaction is 1:1 between CaCl_2 and Na_2CO_3, the reaction will not precipitate all of the carbonate ions as calcium chloride is less in amount than sodium carbonate

c) Number of moles of CaCO_3: 0.0075 mol × 1 mol

mol of Na_2CO_3 = 0.0075 mol of CaCO_3

Mass of CaCO_3 produced: 0.0075 mol × 100.09 g/mol

= 0.750675 g of CaCO_3

d) Since AgCl is obtained from the ore, it means that the mass of silver in the ore is equal to the mass of AgCl obtained. Mass percent of silver = mass of Ag/mass of sample × 100

Mass of silver = 9.10 g

Mass of sample = 200 g

Mass percent of silver = 9.10 g/200 g × 100 = 4.55%

Therefore, the percent by mass of silver in the ore is 4.55%.

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Electric and hydrogen are promising alternative energy sources for transportation, offering benefits such as reduced emissions and lower operating costs, although they also face challenges related to infrastructure and production methods.

Electric and hydrogen are two promising alternative energy sources for transportation that have gained significant attention in recent years. Here are some key points about each:

Electric Vehicles (EVs): EVs use electricity stored in batteries to power an electric motor.

They offer several advantages, including zero tailpipe emissions, reduced dependence on fossil fuels, and lower operating costs compared to traditional internal combustion engine vehicles.

The growth of EV infrastructure and advancements in battery technology have contributed to their increasing popularity.

Hydrogen Fuel Cell Vehicles (FCVs): FCVs use hydrogen gas to generate electricity through a chemical reaction in a fuel cell, which then powers an electric motor. FCVs produce zero tailpipe emissions since the only byproduct is water vapor.

Hydrogen fuel can be refueled quickly, similar to traditional gasoline vehicles, providing a longer driving range compared to battery-powered EVs.

Both electric and hydrogen vehicles have their own set of challenges. For EVs, limited charging infrastructure and range anxiety remain concerns, although they have been improving over time.

Hydrogen FCVs face challenges related to hydrogen production, storage, and distribution infrastructure.

Additionally, the overall environmental impact of these alternative energy sources depends on the methods used for electricity or hydrogen production.

The adoption of alternative energy sources for transportation is a complex and evolving field.

It often involves a combination of technological advancements, policy support, and infrastructure development to enable widespread adoption and address existing challenges.

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Answer:

The answer is January. Your welcome

Explanation:

Answer:

Explanation:

because ( ･ั﹏･ั)( ･ั﹏･ั)( ･ั﹏･ั)

The speed of sound in dry air at 20 degrees Celsius is approximately 343.4 meters per second (m/s).

The speed of sound in dry air can be calculated using the formula:

v = 331.4 + 0.6 * T

Where v is the speed of sound in meters per second (m/s) and T is the temperature in degrees Celsius.

Given that the temperature is 20 degrees Celsius, we can substitute this value into the formula and solve for v:

v = 331.4 + 0.6 * 20

v = 331.4 + 12

v = 343.4 m/s

Therefore, the speed of sound at 20 degrees Celsius in dry air is approximately 343.4 meters per second.

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The average force required to stop the vehicle in a distance of 0.178 m  is 4951.7 N.

The average force is the force applied by an item traveling over a specific period of time at a defined rate of speed, or velocity. This velocity is not instantaneous or precisely calculated, as the word "average" indicates.

vf² = v₀² - 2 ax

The final carriage speed is zero (vf = 0)

0 = v₀² - 2ax

a = v₀² / 2x

a = 1.28²/(2× 0.178)

a = 4.602 m / s²

a = 4.6 m/s²    

We calculate the average force

F = ma

F = 1076 × 4.602

F = 4951.7 N

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Magnetic force on an electron is  2 X 10⁻¹⁹ N,the electric field in the rod is 1.25 V/ m,potential difference between the ends of the rod  0.3 1 V and peed of the rod if the potential difference is 1.0 V is 16m.

By using the formula of motional

Here ,

E Induced emp B - magnetic field,

L Is length of conductor V- velocity

Also, the force Son a positive charge moving in magnetic field is given ask

F = QV*B - -> 2

Here

f - force acting on positively charged

particle V - velocity, 9 7 charge

and B - magicbe freed

(a) The velocity of elections and lode is

same .

By using Eg (2, ie f = q vB sung

by putting the Given value, INengel

f = ( 1 .6022 x 10 ).( 5 * 0.25 ).

= 2 X 10⁻¹⁹ N

(b) In the Equilibrium system the electric force is equals to Magnetic force by putting the values-

E = ( 5 . 0 ) ( 0 25 ) = 1.25 V/ m

( c) By using - E= (0 25 m ) (5m/s )

e = 0. 3 1 V

d )

Again By using EQ1

V=E/BL

=1/( 0 . 25 ) ( 0. 25 )= 16m

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A statement which describes the changes that occur in this sequence of events is: 2. matter is converted into energy and then energy is converted into matter.

The law of conservation of matter (LOCOM) states that mass can neither be created nor destroyed in any chemical reaction.

Similarly, the energy possessed by a matter can neither be created nor destroyed, but it can only be converted from one energy form to another.

In this context, we can logically deduce that a statement which best describes the changes that occur in this sequence of events is that matter is converted into energy and subsequently, energy is converted into matter.

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Let's call x the vinegar.

• The first brand contains 7% vinegar, this can be expressed as ,0.07x,.

• The second brand contains 12% vinegar, this can be expressed as ,(210-x)*0.12, because the total amount is 210 mL.

• The chef wants to make 210mL which is 11% vinegar, this is going to be the other side of the equation.

Let's express the equation.

Now we solve for x.

Answer:

0.16239316239316239316239

Explanation:

ang haba nang solve ko dito hehe

Answer:

I believe it is True... I hope it is correct :)

Explanation:

Answer : False

Explanation :

ANSWER:

Light, heat and sound energy.

STEP-BY-STEP EXPLANATION:

When a television is in operation, several different types of energy transformation occur at the same time. The electrical signals leave the base station towards the device itself and the electricity is converted into light, heat and sound energy.

A genetic disease is an example, such as sickle cell anemia. The organelles that house our genes are called chromosomes. Chromosome disorders include Down syndrome.

A genetic disorder is a condition that is wholly or partially brought on by a deviation from the typical DNA sequence.

Genetic illnesses result from changes or anomalies in an organism's genome. A gene mutation can affect one or more genes, leading to a genetic disorder. Changes in chromosomal structure or number may also be to blame. Genes are the basic unit of heredity.

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Answer:

I already told ya

Explanation:

i got brainly so i could learn

Answer:

In order to answer this question, you need the enthalpy of fusion of ice, which is 333.55 J/g (Joules/gram). The enthalpy of fusion is the amount of heat that must be absorbed or lost in order to change physical state.

The number of Joules required to melt the ice = enthalpy of fusion of ice x mass of ice.

1 kg = 1000g

40kg x (1000g/1kg) = 40,000g

Joules needed to melt the ice = 333.55 J/g x 40000 g = 13342000 J or

1.3342 x 107 J

Explanation:

Instead of 40kg input 50kg and get the answer

Answer:

117.6 m/s

Explanation:

The formula of free-falling velocity is:

\(\displaystyle{v = u + gt}\)

where u is initial velocity, g is gravitational force (defined to be 9.8 m/s^2) and t is time.

Since cantaloupe does not have initial velocity then u will equal to 0 which makes the equation to:

\(\displaystyle{v = gt}\)

Since cantaloupe is free-falling and has its direction or motion same as gravitational force. Therefore, g = 9.8 m/s^2 and t = 12:

\(\displaystyle{v = 9.8 \times 12}\\\\\displaystyle{v = 117.6 \ \, \sf{m/s}}\)

Since distance and displacement have same magnitude in this case with positive value then speed will equal to velocity in sign (positive/negative).

Hence, speed for free-falling cantaloupe after 12 seconds will be 117.6 m/s

Answer:  shadows are not parts of their objects—we can change a shadow without changing the object

Answer:

So we can see objects by seeing silhouettes. By contrast, shadows are not parts of their objects—we can change a shadow without changing the object (say, by putting another object in between the object and the light source). So we cannot see objects by seeing shadows.

Thermal insulation reduces unwanted heat loss and also reduces unwanted heat gain.

Insulation creates a barrier between the hot and the cold object by reducing heat transfer by either reflecting light radiation.

Insulating materials are bad conductors of electricity and heat. So, insulating reduces the heat loss via conduction.

Thermal energy is prevented to increase the temperature of building in summers and decrease in winters. The thermal energy transfer plays vital role in insulating a building.

Thus Thermal insulation reduces unwanted heat loss and also reduces unwanted heat gain.

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Answer:

The hammer.

Explanation:

The most practiced throw in Ultimate. A hammer is an overhead throw held with the forehand grip

Answer:

HAMMER.

Explanation:

Ah, the hammer. The most practiced throw in Ultimate. A hammer is an overhead throw held with the forehand grip

A race car is moving at a constant speed around a track. The race car is changing its velocity as the direction of motion changes.

The primary indicator of an object's position and speed is its velocity. It is the distance that an object travels in one unit of time. The displacement of the item in one unit of time is the definition of velocity.

The rate at which a body's displacement changes in relation to time is known as its velocity. Velocity is a vector quantity with both magnitude and direction. SI unit of velocity is meter/second.

As the race car is moving at a constant speed around a track, the magnitude of velocity remains same but during race it may changes its direction of motion, that is why, velocity of it, which depends on both magnitude and direction, may changes.

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The magnitude of the impulse delivered to the baseball by the bat is 8.8 Ns.

The impulse experienced by any object is equal to the change in the momentum of the object.

The magnitude of the impulse delivered to the baseball by the bat is calculated by applying the following equation.

J = Ft

where;

J = (8000) x (1.1 x 10⁻³)

J = 8.8 Ns

Thus, the magnitude of the impulse delivered to the baseball by the bat is 8.8 Ns.

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Answer:

High water level during a tide is called High tide.

Low water level during a tide is called Low tide.

The light rays leave the second mirror at an angle of 173º.

The angle of incidence of light rays striking the first mirror is 38º. When light strikes a mirror, the angle of incidence is equal to the angle of reflection.

So, the angle of reflection of the light rays striking the first mirror is also 38º.

The two mirrors form a 135º angle, and the angle of reflection of the light rays is 38º. So, if we add those two angles together, we get:

38º + 135º = 173º

The light rays leave the second mirror at an angle of 173º. Therefore, the angle ϕ is equal to 173º.

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Answer:

it is easier to kick a stone than to drag a stone.

Explanation:

the science behind the question is fairly simple.

when you kick and object for say a (rock) you have inertia which is made from you clocking your leg back and swinging it full force forward. when you kick with inertia, you will have a much further travel distance of the object rather than dragging it which is almost set at a certain rate of how fast you are moving (m) and how much inertia you are using by pulling (p)

so m+p=i for inertia. hope this  helped

Answer:

Q=it

I=2.5A

T=600 seconds

Q=2.5*600

= 1,500 C

Answer:

Explanation:

Explanation is attached.

The angular speed of the Percy engine is approximately 0.1257 rad/s.

The angular speed of the Percy engine can be determined using the formula below:

ω = θ/t

Where:

ω is the angular speed

θ is the angle in radians (in this case, it is equal to one full revolution, or 2π radians)t is the time taken to complete the revolution

The radius of the track is 21 cm, and its circumference (the distance the Percy engine travels in one revolution) is given by:

2πr = 2π(21 cm) ≈ 131.95 cm

Therefore, the Percy engine covers a distance of approximately 131.95 cm in 50 seconds.

Using the formula above:

ω = θ/t

ω = 2π/50

ω ≈ 0.1257 rad/s

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The angular speed of the Percy engine is 0.1257 rad/s.

Given, the radius of the track = 21 cm

Time is taken to complete one revolution = 50 seconds

To find: Angular speed of the engine

The formula for angular speed is given as:$$ω = \frac{θ}{t}$$

Where,ω is the angular speed of the engine.θ, which is the angle made by the engine in one complete revolution.t is the time taken to complete one revolution of the engine.

We know that the distance traveled by the engine in one revolution is equal to the circumference of the track, C. Therefore, we have:$$C = 2πr$$

Substituting the values, we get:$$C = 2π × 21$$$$C = 132.0 cm$$

The angle made by the engine in one complete revolution,θ = 2π radians.

Substituting the given values in the formula for angular speed, we have:

$$ω = \frac{θ}{t}$$$$ω = \frac{2π}{50}$$$$ω = 0.1257 \ rad/s$$

Angular speed= 0.1257 rad/s.

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Answer:

the answer is  b

Explanation:

The particles in the cold water moved at a slow rate until an increase in temperature caused an increase in particle motion in the hot tea.

According to the kinetic theory of matter, the particles that compose matter are in constant random motion. The particles collide frequently with each other as well as with the walls of the container.

The temperature of the system refers to the average kinetic energy of the molecules of the body. At a lower temperature, the speed of the particles of water is slow. As the temperature increases, more kinetic energy is imparted to the molecules of water and they move faster.

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Answer:

a. 24 kg m/s

b.  3/5s

Explanation:

a.impulse is the change in momentum so at first the momentum is zero because the ball was at rest and the final momentum is 1.2kg*20m/s=24 kg m/s

so the impulse would be (24-0) kg m/s=24 kg m/s

b. so the impulse equation is impulse is force *delts time

so 24 kg m/s=40N*t

t=24 kg m/s /40N=3/5 s

Work done (J) by the force is 60i - 78j + 18k.

Given,

F = (3i - 6j) NR

= (8i + 6k) m – 12i – 18j + 24J

= F * dJ = (3i - 6j) * (8i + 6k – 12i – 18j + 24)J

= (3i - 6j) * (-4i - 18j + 6k + 24)J

= (-12i - 54j + 18k + 72i - 24j)J

= (60i - 78j + 18k)J

Work done (J) by the force is 60i - 78j + 18k.

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