5) In the picture to the right, a wave source is
moving to the right. Measure the wavelengths
recorded by observer A, on the left, and
observer B, on the right.
Do this by measuring 5 wavelengths and
dividing by 5 to get a precise average.

Answer:

Zero

Explanation:

When it reaches max height, it stops and begins to fall back down....at this point the velocity = 0

The time constant of the circuit can be determined from the formula τ = RC. The values given in the question are R = 4.00 MΩ and C = 3.00 µF. Thus, the time constant is given as:τ = RC = (4.00 × 10^6 Ω) × (3.00 × 10^-6 F) = 12 secondsb. The current in the circuit can be found by using Ohm’s law, which states that I = V/R, where V is the voltage across the circuit.

The voltage across the circuit is 12.0 V, so the current is given as:I = V/R = (12.0 V)/(4.00 MΩ) = 3.00 µAThe charge on the capacitor as a function of time can be found using the formula Q = Qmax (1 - e^(-t/τ)), where Qmax is the maximum charge that can be stored by the capacitor. The maximum charge can be found using the formula Qmax = CV, where V is the voltage across the capacitor.

The voltage across the capacitor is the same as the voltage across the circuit, which is 12.0 V. Thus, the maximum charge that can be stored by the capacitor is:Qmax = CV = (3.00 × 10^-6 F) × (12.0 V) = 36 µCThe charge on the capacitor as a function of time is given as:Q = Qmax (1 - e^(-t/τ)) = (36 µC) (1 - e^(-t/12)).

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The hollow spherical shell has a mass of 7.90 kg and a radius of 0.230 m. It initially rests and then rotates with a constant acceleration of 0.895 rad/s2 around a stationary axis that lies along a diameter. The kinetic energy of the hollow spherical shell is 2.12 J.

The first step is to calculate the angular displacement using the formulaθ = n × 2π = 5.00 rev × 2π/rev = 31.4 rad[The angular displacement here is a positive value, as the spherical shell is rotating in a counterclockwise direction]. The next step is to calculate the angular velocity after 5.00 rev, using the formula

ωf = ωi + αt, where ωi = 0 [initial angular velocity]α = 0.895 rad/s2 [angular acceleration n]t = 2.22 s [time taken to complete 5.00 revolutions]Therefore,ωf = 0 + 0.895 × 2.22 = 1.987 rad/s Kinetic energy of the shell, K = 1/2 I ω²where I is the moment of inertia of the shell.

The moment of inertia of a hollow spherical shell is given by

I = 2/3 M R² where M is the mass of the shell and R is the radius of the shellSubstituting values, K = 1/2 × 2/3 × 7.90 × (0.230)² × (1.987)²= 2.12 J [to 2 significant figures]

Therefore, the kinetic energy of the hollow spherical shell is 2.12 J after it has turned through 5.00 revolutions.

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Answer:

Y

Explanation:

I had this question and y was right .

Answer: mixture

Explanation:

Answer:

soil is a mixture of minerals, dead and living organisms (organic materials), air, and water. These four ingredients react with one another in amazing ways, making soil one of our planet’s most dynamic and important natural resources.

Another definition of soil

The surface mineral and/or organic layer of the earth that has experienced some degree of physical, biological and chemical weathering.

In summary, soil is a mixture....

Given :

A car drives 10 km with a speed of 72 km/hr and then runs out of gas.

Then you walk 2 km for the next 30 min  until you find a gas station .

To Find :

The average speed of whole journey .

Solution :

Average speed is given by :

\(v_{avg}=\dfrac{\text{Total distance covered}}{\text{Total time taken}}\\\\v_{avg}=\dfrac{10+2}{\dfrac{10}{72}+\dfrac{1}{2}}\\\\\\v_{avg}=18.78\ km/hr\)

Hence , this is the required solution .

Answer:

B I'm Pretty Sure :DDD

Explanation:

Balanced Forces

In one of your situations in the last section, you pushed or pulled on an object from opposite directions but with the same force. You observed that the object did not move. When the forces on an object are equal and in opposite directions, the forces are balanced, and there is no change in motion.

Answer:

a. normal

Explanation:

In the field of physics the normal is a line drawn at a right angle to a barrier. In other words the normal line is the line that is drawn perpendicular (right angle, 90 degrees) to the reflective surface of a mirror, or the particular boundary in which refraction occurs at the point of incidence of a light ray. This can be seen in the picture attached below.

Answer:

C. Its melting point equals −38.8 °C because it is mercury.

Explanation:

Given that the old thermometer contained a very small amount of mercury and the melting point of mercury is \(-30^{\circ}C\).

The temperature at which any material starts changing from the solid-state to the liquid-state is known as the melting point of the material.

As the melting point of any material does not depends on the amount of material. So, whether there is a small amount of mercury or is a large amount of mercury.

Hence, the melting point remains \(-30^{\circ}C\) because it is mercury.

So, option (C) is correct.

As per the definition above, there is no need to burn the mercury to determine the melting point, so option (A) is wrong.

The melting point does not depend on the initial temperature, mass, volume of the material, so options (B) and (D) are wrong.

The type of angle pair between angles K and D is "Alternate interior," 4th option.

"Alternate interior" angles are a pair of angles on opposite sides of a transversal line that are between two parallel lines. When two lines are parallel, alternate interior angles are equal in measure. In this case, lines m and n are parallel, and angles K and D are located on opposite sides of the transversal line AB.

They do not add up to 180° unless the alternate interior vertical angles are 90°. If the alternate interior angles are obtuse, adding them together will yield a value greater than 180°.

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Hi there!

We can use the work-energy theorem to solve.

Recall that:

\(\large\boxed{W = \Delta KE = \frac{1}{2}mv_f^2 - \frac{1}{2}mv_i^2}\)

The initial kinetic energy is 0 J because the crate begins from rest, so we can plug in the given values for mass and final velocity:

\(W = \frac{1}{2}(50)(5.61^2) = 786.8025 J\)

Now, we can define work:

\(\large\boxed{W = Fdcos\theta}}\)

Now, plug in the values:

\(786.8025 = Fdcos\theta\\\\786.8025 = (375)(3.07)cos\theta\)

Solve for theta:

\(cos\theta = .6834\\\theta = cos^{-1}(.6834) = \boxed{46.887^o}\)

The acceleration of the 5. 0-kilogram cart on applying two equal and opposite force be 0 m/s².

Acceleration is rate of change of velocity with time. Due to having both direction and magnitude, it is a vector quantity. Si unit of acceleration is meter/second² (m/s²).

Given parameters:

One force: F₁ = 25 Newtons acted eastwards.

Another force: F₂ =  25 Newtons acted westwards.

Magnitude of net force acting on the object = (25N -25N) = 0 Newton.

Hence, acceleration of the 5. 0-kilogram cart. be 0 m/s².

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Jogging is a way to build endurance as it involves a sustained period of cardiovascular activity, which gradually improves endurance levels.

Back squatting is a way to build strength, as it involves lifting a heavy weight and repeatedly pushing against resistance, which strengthens the muscles and improves overall strength. Pilates is a way to build flexibility, as it involves stretching and elongating the muscles in a controlled way, which improves range of motion and overall flexibility. Cycling is a way to build endurance, as it involves sustained cardiovascular activity and can be done at different levels of intensity to gradually improve endurance levels. Pushups are a way to build strength, as they involve repeatedly pushing against resistance and gradually improving the strength of the chest, arms, and core muscles. Yoga is a way to build flexibility, as it involves stretching and elongating the muscles in a controlled way, which improves range of motion and overall flexibility. Building endurance, strength, and flexibility are all important for overall health and fitness, and incorporating a variety of activities into your workout routine can help to achieve this balance.

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Answer:

The answer would be D. The area used to be underwater.

Explanation:

\(\qquad\qquad\huge\underline{{\sf Answer}}\)

The Correct choice is D

During the excavation, fossils of fishes were found that confirms that the area was once underwater.

Answer:

Answer is A

Speed = Wavelength × Frequency

Explanation:

Googled it

Coach Carver has created a new team game for his students to play. It involves sprinting, tagging, and throwing a ball. Each team consists of 10 to 20 students. Which place is the safest to play the game

Answer:

Football Field

Explanation:

In sporting or gaming activities that involve sprinting, tagging, and throwing a ball. The safest place to play the game is "FOOTBALL FIELD"

This is because the football field is originally designed and created for footballing activities which are deemed spacious and free of danger. There is also evidence in the Olympic sporting activities.

Therefore, in this case, even though there is no option in the question, the correct answer is the Football field.

Answer:

hydrochlorine +12÷B to the power of 4 -× y reapeated zminus 2 to the power of 9

When the area of each plate is doubled while keeping the charge and separation constant, the electric field decreases, the potential difference remains the same, and the stored energy in the capacitor increases four times.

When the area of each plate of a capacitor is doubled while keeping the total charge on each plate and the separation between the plates constant, the following changes occur:

1. Electric Field: The electric field between the plates decreases. The electric field (E) between the plates of a capacitor is inversely proportional to the area (A) of the plates. As the area is doubled, the electric field is halved, assuming the other factors remain constant.

2. Potential Difference: The potential difference (V) across the plates remains the same. The potential difference across the plates of a capacitor depends on the charge (Q) and the capacitance (C), which is determined by the geometric and material properties of the capacitor. Since the total charge and separation between the plates are held constant, the potential difference remains unchanged.

3. Stored Energy: The stored energy in the capacitor increases four times. The energy stored in a capacitor (U) is directly proportional to the area of the plates (A). When the area is doubled, the stored energy is quadrupled (increases by a factor of four).

Therefore, when the area of each plate is doubled while keeping the charge and separation constant, the electric field decreases, the potential difference remains the same, and the stored energy in the capacitor increases four times.

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Answer:

friction

air drag

every thing that opposes the motion affects kinetic energy

Explanation:

kinetic energy is a energy which is increase with increase in motion and potential energy is energy stored while the object is at rest

potential energy ∝ 1/(kinetic energy)

as kinetic energy increases potential energy decreases

Table at rest, Books on a table, See-saw are objects in equilibrium found in the class room.

There is no net force acting on an object and it is said to be in equilibrium if the size and direction of the forces acting on it are precisely balanced. If an object is moving with a constant velocity, it is in equilibrium because its acceleration is zero. The fundamental function of an object in equilibrium is a zero acceleration.

Two forces are in equilibrium when they are acting on an object that is stationary or moving at a constant speed. The body will accelerate if the forces have a result rather than canceling each other out.

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The orbital speed of the Moon around the Earth is approximately 1022 m/s. the angular speed of the Moon around the Earth is approximately 2.69 x \(10^-6\) rad/s. the period of the Moon's revolution around the Earth is approximately 2.36 x 10⁶ seconds or 27.3 days (since there are approximately 86,400 seconds in a day).

To calculate the rate of rotation of the Moon around the Earth, we need to know the mass of the Moon and the gravitational constant (G). The mass of the Moon is approximately 7.342 x 10²² kg, and the gravitational constant is approximately 6.674 x 10⁻¹¹ m³/kg/s².

Using these values, we can calculate the orbital speed, angular speed, and period of the Moon's revolution as follows:

Orbital speed: The orbital speed of the Moon around the Earth can be calculated using the formula:

v = √(G(M+E)/r)

where v is the orbital speed, G is the gravitational constant, M is the mass of the Moon, E is the mass of the Earth, and r is the distance between their centers.

Plugging in the values, we get:

v = √(6.674 x 10⁻¹¹ x (7.342 x 10²² + 5.972 x 10²⁴) / (380,000 x 1000)) = 1022 m/s

Therefore, the orbital speed of the Moon around the Earth is approximately 1022 m/s.

Angular speed: The angular speed of the Moon around the Earth can be calculated using the formula:

ω = v/r

where ω is the angular speed and r is the distance between the centers of the Earth and the Moon.

Plugging in the values, we get:

ω = 1022 / (380,000 x 1000) = 2.69 x \(10^-6\) rad/s

Therefore, the angular speed of the Moon around the Earth is approximately 2.69 x \(10^-6\) rad/s.

Period of moon revolution: The period of the Moon's revolution around the Earth can be calculated using the formula:

T = 2πr/v

where T is the period, r is the distance between the centers of the Earth and the Moon, and v is the orbital speed.

Plugging in the values, we get:

T = 2π x 380,000 x 1000 / 1022 = 2.36 x \(10^6\) s

Therefore, the period of the Moon's revolution around the Earth is approximately 2.36 x 10⁶ seconds or 27.3 days (since there are approximately 86,400 seconds in a day).

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Translated Question ;

The distance between the centers of the Earth and the Moon is 380,000 km, what other data are needed to calculate the rate of rotation of the Moon around the Earth, from these data, calculate the orbital speed, the angular speed, and the period of moon revolution

True, solenoids convert electrical energy directly into linear mechanical motion by using a coil of wire and a movable plunger.

A solenoid is an electromechanical device that consists of a coil of wire wrapped around a metallic core, usually a cylindrical plunger. When an electric current is applied to the coil, it creates a magnetic field that pulls the plunger inwards. This action produces linear mechanical motion, which can be used to operate various devices such as valves, switches, or relays.

The strength of the magnetic field and the resulting motion depend on the number of turns in the coil, the current flowing through the wire, and the properties of the core material. When the current is removed, the magnetic field collapses, and the plunger returns to its original position, either by a spring or the absence of the magnetic force.

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Answer:

d. it will be replaced by a new theory if enough evidence is collected.

Explanation:

i think

The volume of gasoline with a density of 0.680 g/cm3 and a mass of  4,400 g is: 6,470.58 cm3

The density formula and the procedure we will use is:

d = m/v

Where:

Information about the problem:

Applying the density formula and clearing the volume we get:

d = m/v

v = m/ d

v = 4,400 g/0.680 g/cm3

v = 6,470.58 cm3

It is a physical quantity that expresses the ratio of the body mass to the volume it occupies.

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Sweating is an effective way to cool down on a hot day because the process of evaporation removes heat from your body. When sweat evaporates, it absorbs heat from your skin, lowering your body temperature.

why do we sweat?
Sweating is the body's natural way of cooling itself down. When we sweat, our bodies release water onto the surface of our skin. This water then evaporates, taking heat with it and leaving us feeling cooler. This process is known as "evaporation cooling."

Evaporation occurs when a liquid turns into a gas. In the case of sweating, the liquid is water and the gas is water vapor. As the water on our skin evaporates, it takes some of the heat from our bodies with it, leaving us feeling cooler.

So, the concept of evaporation is key to understanding why sweating on a hot day can cool us down. As the sweat on our skin evaporates, it removes heat from our bodies, helping to regulate our body temperature and keep us from overheating.

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Under the given scenario, the people in Hawaii would have approximately 47 minutes (0.78 x 60 minutes) from observing the unusual sea level decrease to when the tsunami reaches their location.

A tsunami of wavelength 225km and velocity 575km/h travels across the Pacific Ocean. As it approaches Hawaii, people observe an unusual decrease in sea level in the harbors. To determine how much time people have to run to safety, we need to calculate the time it takes for the tsunami to reach Hawaii.

We can use the formula: time = distance/velocity.

In this case, the distance is unknown, but we can use the wavelength as a proxy. Since the wavelength is 225km, we can assume that the distance between each crest and trough of the wave is 225km. Therefore, the distance traveled by the wave in one wavelength is 2 x 225km = 450km.

Now we can calculate the time it takes for the wave to travel this distance using the given velocity of 575km/h:

time = distance/velocity
time = 450km / 575km/h
time = 0.78 hours

So the people in Hawaii would have approximately 47 minutes (0.78 x 60 minutes) from observing the unusual sea level decrease to when the tsunami reaches their location. It's important to note that this is just an estimate and the actual time may vary depending on factors such as the ocean's depth and the coastline's shape.

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I dont see the question to this

Answer:

The correct answer would be B

Explanation:

I took the test and we use wind and turbines to create a renewable energy source.

The de Broglie wavelength of the electron is 2.212 x 10-11 m.

The de Broglie wavelength is a concept in quantum mechanics which states that all matter has a wave-like nature, and can thus be described as a wave.

(a) The de Broglie wavelength (λ) of a particle is given by the equation: λ = h/p, where h is Planck's constant (6.626 x 10-34 J.s) and p is the momentum of the particle.
The momentum of an electron with a 1000-V potential drop is given by the equation p = eV/c,
where e is the electron charge (1.602 x 10-19 C) and c is the speed of light (2.998 x 108 m/s).
Therefore, the de Broglie wavelength of the electron is:
λ = h/(eV/c) = (6.626 x 10-34 J.s) / (1.602 x 10-19 C x 1000 V/2.998 x 108 m/s) = 2.212 x 10-11 m.

(b) X-rays are produced when high-energy electrons strike a solid.
The wavelength of the x-ray is inversely proportional to the energy of the electron.
The energy of the electron is equal to the potential drop, i.e. 1000 eV. Therefore,
the wavelength of the x-ray produced is: λ = hc/eV = (6.626 x 10-34 J.s x 2.998 x 108 m/s)/(1.602 x 10-19 C x 1000 eV) = 1.246 x 10-10 m.

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