Which kind of wave can refract when crossing from one medium to another, with the wave having a different speed in the two media? A) Water waves B) Electromagnetic waves C) Sound waves D) Electromagnetic, sound and water waves E) only electromagnetic and sound waves

Answer:

A. 3,000,000 m

B. 0.25 km

C. 10 m

D. 1,000 cm

Explanation:

no hablo español, así que solo ingrese esto en el traductor de G*ogle

A. One kilometer equals 1000 meters, so

3,000*1,000 = 3,000,000 m

B. One meter equals 0.001 kilometer, so

250*0.001 = 0.25 km

C. One centimeter equals 0.01 meter

1,000*0.01 = 10 m

D. One milimeter equals 0.1 centimer, so

10,000*0.1 = 1,000

The undamped horizontal spring oscillator has an amplitude of 1.61 m when passing through its equilibrium position during oscillation.

It is given to us that -

Mass of the undamped spring oscillator, m = 2.52 kg

Spring constant during oscillation, k = 21.6 n/m

Speed of the spring oscillator, v = 3.34 m/s

We have to find out the amplitude of oscillation, say A.

According to the concept of Conservation of Energy, we can say that -

\(\frac{1}{2} mv^{2} = \frac{1}{2} kA^{2}\) ------ (1)

where,

m = mass of the oscillator

v = speed of oscillation

k = Spring constant

A = Amplitude of oscillation

Now, substituting the given values in equation (1), we have

\(\frac{1}{2} mv^{2} = \frac{1}{2} kA^{2}\\= > \frac{1}{2} *2.52*(3.34)^{2} = \frac{1}{2} *21.6*A^{2}\\= > 28.11211 = 10.8A^{2}\\= > A^{2}=2.60\\= > A = 1.61m\)

Therefore, the undamped horizontal spring oscillator has an amplitude of 1.61 m when passing through its equilibrium position during oscillation.

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Answer:

  1500 J

Explanation:

Apparently, we're to assume that no energy is lost to friction or other effects. Then all of the energy the train has is due to work being done on it.

  1500 J of work was done on the train

Answer:

I'm terrible at explaining so here's a screenshot, please do not listen to the other answer, it is wrong.

- Ripper

Explanation:

Answer:

C is the correct answer !!!

Explanation:

Initially the sound waves are in phase and they overlap to form the constructive interference pattern. The length that we have to raise the top part will be equal to the wavelength of the waves in meters.

Interference is an absorption word from English, namely interference, which means interference, obstacles, and mixing. Interference in this case can be interpreted as an obstacle in a process caused by obstacles in the form of mixing something in something.

Wave interference is a combination of a number of separate waves in the same medium and produces a resultant wave. An example is music. Music is formed from a combination of several sound waves that interfere with each other.

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The concentration of (OH −) Hydroxide ions increase when the excessive base is added to the solution of Sodium Hydroxide as the base itself dissociates to give out OH −  ions which increase their concentration per unit volume.

when sodium hydroxide NaOH dissolves in water it separates into positively charged sodium ions cations and negatively charged hydroxide ions anions. these ions move round in the water, free and unbiased of every other, although cations have a tendency to be surrounded greater intently with the aid of anions and vice versa.

Sodium while sodium is added to water, the sodium melts to form a ball that moves around at the surface. It fizzes unexpectedly, and the hydrogen produced may also burn with an orange flame before the sodium disappears. The resulting huge concentration of OH- makes the solution greater basic and results in a dramatic growth inside the pH.

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Answer:

Electrostatics is a branch of physics that studies electric charges at rest. Since classical physics, it has been known that some materials, such as amber, attract lightweight particles after rubbing. The Greek word for amber, or electron, was thus the source of the word 'electricity'.

Answer:

The new radius will be 1.3 times the original radius, so r_new = 1.3r_old. Plugging this into the equation for moment of inertia, we get:

I_new = m * r_new^2 / 2

= m * (1.3r_old)^2 / 2

= m * 1.69 * r_old^2 / 2

= 1.69 * (m * r_old^2 / 2)

= 1.69 * I_old

Therefore, the moment of inertia increases by 69% when the radius is increased by 30% while the mass is held constant.

The grindstone, shaped like a solid disk, with a diameter of 0.650 m and a mass of 55.0 kg, has a shaft attached 0.300 m from its center. The shaft itself has a mass of 4.00 kg.

When the motor attached to the grindstone is shut off, it comes to rest in 9.50 s after initially rotating at 450 rev/min.

The angular deceleration of the grindstone can be calculated using the equation:

α = (ωf - ωi) / t

where α is the angular deceleration, ωf is the final angular velocity, ωi is the initial angular velocity, and t is the time taken for deceleration.

To find the angular deceleration, we need to convert the initial angular velocity from rev/min to rad/s:

ωi = (450 rev/min) × (2π rad/rev) × (1 min/60 s) = 47.12 rad/s

The final angular velocity is zero since the grindstone comes to rest.

Plugging in the values:

α = (0 - 47.12 rad/s) / 9.50 s = -4.96 rad/s²

Therefore, the angular deceleration of the grindstone is -4.96 rad/s².

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Answer:

The smaller net force :)

Explanation:

The second law shows that if you exert the same force on two objects of different mass, you will get different accelerations (changes in motion). The effect (acceleration) on the smaller mass will be greater (more noticeable).

If two different net forces are applied to the same object at different times, a smaller net force will cause the object to accelerate at a greater rate.

Force is defined as the push or pulls applied to the body. Sometimes it is used to change the shape, size, and direction of the body. Force is defined as the product of mass and acceleration. Its unit is Newton.

Newton's second rule states that if you apply the same force to two objects with different masses, the accelerations will be different. The impact will be larger on the smaller mass.

If two different net forces are applied to the same object at different times, a smaller net force will cause the object to accelerate at a greater rate.

Hence smaller rate is the correct answer.

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To determine the frequencies for communication with the Montgomery County FSS (Flight Service Station) while on the ground at College Station, I would need more specific information such as the specific frequency bands or channels used by the Montgomery County FSS.

Typically, flight service stations utilize specific frequency bands allocated by aviation regulatory authorities for aviation communication purposes. These frequency bands include VHF (Very High Frequency) and UHF (Ultra High Frequency) bands. VHF frequencies are commonly used for air-to-ground communication in the aviation industry.To determine the exact frequencies for communication with the Montgomery County FSS at College Station, it would be best to consult the appropriate aviation authorities, such as the Federal Aviation Administration (FAA) or relevant aviation communication resources, which can provide the specific frequencies and channels used by the Montgomery County FSS.

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The magnitude of the gravitational force between the meteor and earth becomes 64 times as great when meteor moves from 16 to 2 radii.

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The minimum current through R1 will be 10mA.

Using Ohm's Law (V = IR), we can find the minimum current through R1 as follows:

Vr1 = Vz5 + Vz6

where Vr1 is the voltage across resistor R1.

Therefore, the minimum current through R1 is:

Ir1 = Vr1 / R1

Assuming that R1 is a standard value resistor (e.g., 1kΩ), and the Zener voltages are each 5V, the voltage across R1 will be:

Vr1 = Vz5 + Vz6 = 5V + 5V = 10V

Therefore, the minimum current through R1 will be:

Ir1 = Vr1 / R1 = 10V / 1kΩ = 10mA

Current is the flow of electric charge through a conductor or material. It is defined as the rate of flow of electric charge, measured in units of amperes (A). One ampere is equivalent to the flow of one coulomb of electric charge per second.

Electric current is caused by the movement of charged particles, typically electrons, in a circuit. When a voltage is applied to a conductor, it creates an electric field that causes electrons to move through the conductor. This flow of electrons constitutes an electric current.

The direction of electric current is defined as the direction of flow of positive charges, even though the actual charges that move are electrons, which are negatively charged. Electric current can be direct current (DC), where the flow of charge is in one direction, or alternating current (AC), where the direction of flow periodically changes.

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Answer:

grav times mass equals force

Explanation:

This is a Uniformly Accelerated Rectilinear Motion exercise.

We obtain the following data:

Vo = 20 m/s, Vf = 35 m/s, t = 5, a = ¿?

To calculate the acceleration, subtract the final velocity minus the initial velocity, divided by the time.

a = Vf - Vo / t

Greetings

Answer:

waterproof and transmits light.

Answer:

waterproof and transmits light.

Explanation:

When two or more cars arrive at an intersection at approximately the same time, the general rule is that the car on the right has the right of way.

However, if the cars are directly across from each other and there is no clear right or left, then the car that is already in the intersection has the right of way. In situations where there is still confusion, it is always best to proceed with caution and communicate with other drivers to ensure a safe and orderly flow of traffic.
When two or more cars arrive at an intersection at approximately the same time, the question of "who goes first?" depends on several factors.
1. Check for traffic signs or signals: Follow the rules indicated by stop signs, yield signs, or traffic signals to determine the right of way.
2. Right of way at a four-way stop: If it is a four-way stop, the first car to come to a complete stop has the right to proceed. If multiple cars stop at the same time, the car furthest to the right has the right of way.
3. Right of way at a T-intersection: If it is a T-intersection (three-way stop), the car on the through road has priority over the car on the terminating road.
Remember, always prioritize safety and ensure all drivers are aware of their turn before proceeding through the intersection.

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The mass of object b will be 1.5kg.

As a twisting or turning force, torque frequently causes objects to rotate around an axis, which could be the center of mass or a fixed point. Another way to think of torque is the capacity of something rotating, such as a shaft or gear, to overcome turning resistance.

Balancing torque for lower end

m x 2 = \(m_{A}\) x 1

m = 1x1/2

m = 0.5kg

for middle one

(mA + m) x 2 = \(m_{0}\) x 1

\(m_{0}\) = (0.5+1) × 2

\(m_{0}\) = 3.0kg

for upper end

\(m_{B}\) x 3 = (\(m_{A}\)+m+\(m_{0}\)) x 1

\(m_{B}\) x 3 =  (1+0.5+3)

\(m_{B}\) x 3 = 4.5

\(m_{B}\) = 4.5/3

\(m_{B}\) = 1.5kg.

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Elasticity is of significant importance in the everyday lives of businesses and consumers as it helps them understand and respond to changes in prices and demand for goods or services. By considering elasticity, businesses can make informed decisions regarding pricing strategies, production levels, and resource allocation. Consumers, on the other hand, can assess the impact of price changes on their purchasing decisions and adjust their consumption patterns accordingly.

Elasticity, specifically price elasticity of demand, measures the responsiveness of consumer demand to changes in price. It indicates the percentage change in quantity demanded resulting from a one percent change in price. Understanding price elasticity allows businesses to determine how sensitive consumers are to changes in price and adjust their pricing strategies accordingly.

For example, let's consider the market for gasoline. Gasoline is a highly price-sensitive good, meaning that changes in its price have a significant impact on consumer demand. If the price of gasoline increases, consumers may reduce their consumption and seek alternatives such as carpooling or using public transportation. In this scenario, businesses need to consider the price elasticity of gasoline to predict and respond to changes in consumer behavior. They might lower prices to stimulate demand or introduce more fuel-efficient options to cater to price-conscious consumers.

In conclusion, elasticity matters because it provides valuable insights into the dynamics of supply and demand, enabling businesses and consumers to make informed decisions in response to price changes. By understanding elasticity, businesses can adapt their strategies to maintain competitiveness, while consumers can optimize their purchasing choices based on price sensitivity.

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Answer:

1. Cell

2.Cells

3.Robert Hooke

The Weight of an object is more at pole and less at equator of the earth because the distance of the pole is less than the distance of the equator from the centre of the earth.

True. Various heat-related disorders can be brought on by inadequate hydration combined with exposure to extreme heat and humidity.

One of three disorders brought on by excessive heat, with heat cramps being the least dangerous and heatstroke being the most serious, is heat exhaustion. High temperatures, particularly when there is also a high humidity level, and intensive physical activity are the main causes of heat illness.

According to T8 CCR Section 3395, "Heat Illness" refers to a dangerous medical illness caused by the body's incapacity to handle a specific amount of heat. Examples of this ailment include heat cramps, heat exhaustion, heat syncope, and heat stroke.

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Answer:

N = q / e    where q is the total charge on the ion and e = 1.6E-19 the charge on an electron or N = coulombs / (coulombs / electron)

The wavelength of the light is approximately 563 nm.

The formula to calculate the wavelength of light diffracted by a grating is given by:

λ = d sinθ / m

where λ is the wavelength of light, d is the slit spacing (the inverse of the number of slits per unit length), θ is the diffraction angle, and m is the order of diffraction.

Substituting the given values, we get:

λ = (1/750) mm x sin(34°) / 1

λ = 5.63 × 10⁻⁷m

Therefore, the wavelength of the light is approximately 563 nm.

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Answer:

Ductility

Explanation:

is the physical property of a material associated with the ability to be hammered thin or stretched into wire without breaking. A ductile substance can be drawn into a wire.

Answer:

conduction i think

Explanation:

Answer:Conduction

Explanation:

Answer:

20N

Explanation:

w over h is 600 divided by 300

Answer:

20 000 pascals

Explanation:

PRESSURE in the metric system is measured in Pascals

   the units are   N / m^2

300 cm^2 = .03 m^2

600N / .03 m^2 =20 000 pascals

Answer:

I. increase the force that the engine provides.

II. decrease the mass of the car

Explanation:

Newton's Second Law of Motion states that the acceleration of a physical object is directly proportional to the net force acting on the physical object and inversely proportional to its mass.

Mathematically, it is given by the formula;

Force = mass * acceleration

\( Acceleration = \frac {Force}{mass} \)

In this scenario, a car manufacturer wants to change its car’s design to increase the car’s acceleration. Thus, the changes the engineers should consider making to the design is to increase the force that the engine provides and decrease the mass of the car.

Answers:

The astronaut's final speed with respect to the shuttle after the tank is thrown would be 2.67 m/s.

Let's first find the initial momentum of the system, which is zero because the astronaut is at rest with respect to the shuttle and the tank is thrown in the opposite direction with a speed of 12 m/s:

p_initial = m_astronaut * v_astronaut_initial + m_tank * v_tank_initial

where m_astronaut = 63 kg is the mass of the astronaut, v_astronaut_initial = 0 m/s is the initial velocity of the astronaut, m_tank = 10 kg is the mass of the oxygen tank, and v_tank_initial = -12 m/s is the initial velocity of the tank (negative because it is thrown in the opposite direction).

p_initial = 63 kg * 0 m/s + 10 kg * (-12 m/s) = -120 kg m/s

After the tank is thrown, the system experiences no external forces, so its total momentum remains constant:

p_final = m_astronaut * v_astronaut_final + m_tank * v_tank_final

Since the tank is thrown away from the astronaut with a certain momentum, the astronaut gains an equal and opposite momentum, so we can write:

p_final = -p_initial

Substituting the values of p_final and p_initial, we get:

m_astronaut * v_astronaut_final + m_tank * v_tank_final = -120 kg m/s

We also know that the tank is thrown away at a certain speed, so we can write:

v_tank_final = -12 m/s

Thus:

m_astronaut * v_astronaut_final + 10 kg * (-12 m/s) = -120 kg m/s

v_astronaut_final = (120 kg m/s - 10 kg * (-12 m/s)) / 63 kg

v_astronaut_final = 2.67 m/s

Therefore, the astronaut's final speed with respect to the shuttle after the tank is thrown is 2.67 m/s.

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Answer:

Charge quantization is the principle that the charge of any object is an integer multiple of the elementary charge.

Explanation: