An increasing magnetic field is 50.0 ∘
clockwise from the vertical axis, and increases from 0.800 T to 0.96 T in 2.00 s. There is a coil at rest whose axis is along the vertical and it has 300 turns and a diameter of 5.50 cm. What is the induced emf?

Answer:

When there's no external force, the total momentum of system remains the same before and after collision

Less than the kinetic energy of the system before the collision

Explanation:

Definition of conservation of momentum

: the total linear momentum of a system of particles not acted upon by external forces is constant in magnitude and direction irrespective of any reactions among the parts of the system

Definition of inelastic collision:An inelastic collision is a collision in which there is a loss of kinetic energy.

Brainliest please

Answer:b

Explanation:

Here are 3 alkali metals with physical and chemical similarity.

What is alkali metals?

Alkali metals are come from the fact that when these metals or their oxides dissolved in water.a basic solution results.

Three alkali metals -

1- hydrogen(H)

2-lithium(Li)

3-potassium(K)

Physical and chemical similarity of hydrogen -

-it is colourless and tasteless in nature.

-it is a combustible gas but not a supporter of combustion.

Physical and chemical similarity of lithium -

-it have a melting point of 180.54

-it is the lightest of all metals,with a density approximately half that of water.

Physical and chemical similarity of pottasium -

- this metal is soft and white with a silver lustre.

-it imparts a lavender colour to a flame, and it's vapour is green.

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Answer:

Explanation:

Step one:

given

mass m= 24kg

distance moved= 6m

time taken= 4seconds

Step two:

Required

power

but work done is the force applied at a distance, and the power is the work done time the time taken

Work done= F*D

F=mg

W= mg*D

W=24*9.81*6

W=1412.6J

Power P= work * time

P=1412.6*4

p=5650.5W

P=5.6kW

Answer:

many for a hour. I don't know how much I did this week

Explanation:

My goal was to do jogging every morning for around one hour for starters. I felt release of endorphins and I gained lots of positive energy. Organizations tell that it's good to do exercise for 60 minutes and take 1200 steps at least.

Hope this helps

Answer: Volume and mass

Explanation: I took the quiz lol

The final momentum of the skater is 3.77 m/s.

Momentum is the product of mass and acceleration. Recall that the principle of conservation of linear momentum states that total momentum before collision must equal the total momentum after collision.

Thus;

(50 Kg × 0 m/s) + (55Kg ×  7.2m/s) = (50 Kg + 55Kg) v

v =  (55Kg ×  7.2m/s)/(50 Kg + 55Kg)

v = 396/105

v = 3.77 m/s

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After three half-lives, 1/8 (or 0.125) of the parent isotope remains. Thus, 0.125 times the parent atoms. The daughter isotope would be equivalent to the remaining parent isotope, 0.125 times the original number of parent atoms.

After three half-lives, the parent isotope has exponentially decayed, forming the daughter isotope. Each half-life reduces the parent isotope by half and increases the daughter isotope. Three half-lives have passed, reducing the parent isotope to 1/8 of its initial level. The rock sample would have 1/8 of the parent isotope.

The daughter isotope would have accumulated during decay. After three half-lives, the daughter isotope would have reached 3/8 of the parent isotope as each half-life creates one-half of it. After three half-lives, the rock sample would have 1/8 of the parent isotope and 3/8 of the daughter.

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Groundwater pressure is one of the major factors that promotes landslides.

The five main reasons for its impact on slope stability are listed below:

1. Increase in water pressure: The first factor that promotes landslides due to groundwater pressure is the increase in water pressure. Groundwater pressure builds up in soil when water cannot flow through it, causing the soil to become saturated. When this happens, the weight of the water increases and causes an increase in pressure. This can lead to the failure of the soil, resulting in a landslide.

2. Weakening of soil structure: The second reason for the impact of groundwater pressure on slope stability is the weakening of soil structure. Soil structure refers to the arrangement of soil particles and their binding properties. Water can weaken soil structure, leading to the failure of the soil and a landslide.

3. Saturation of soil: The third reason is the saturation of soil. When soil becomes saturated, it loses its ability to hold water, causing it to become unstable. This can lead to a landslide.

4. Reduction of shear strength: The fourth reason is the reduction of shear strength. Shear strength refers to the ability of a soil mass to resist sliding along a surface. Water can reduce the shear strength of soil, making it more susceptible to failure.

5. Increase in pore pressure: The final reason for the impact of groundwater pressure on slope stability is the increase in pore pressure. Pore pressure refers to the pressure of water within the spaces between soil particles. When pore pressure increases, it can cause soil particles to become separated, leading to soil failure and a landslide.

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The height of the wooden block would be approximately 2.04 meters.

To calculate the height (h) of a 15 kg wooden block with a gravitational potential energy (GPE) of 300 J, we can use the formula:

GPE = m ×× g  h

Rearranging the formula to solve for height (h):

h = GPE / (m × g)

Plugging in the values

m = 15 kg (mass of the wooden block)

GPE = 300 J (gravitational potential energy)

g ≈ 9.8 m/s² (acceleration due to gravity on Earth)

Calculating the height (h)

h = 300 J / (15 kg × 9.8 m/s²) h ≈ 2.04 meters

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-- The given question is incomplete, the complete question is

"Calculate the height of 15 kg wooden block if it were to have a GPE of 300 J."--

a. Alternating.

The electrical current used to transmit electricity to our homes and workplaces is alternating current (AC). AC is used because it can be easily transformed into different voltages using a transformer,

which makes it more efficient for long-distance transmission. AC is also the type of current that is generated by most power plants.

In contrast, direct current (DC) is not commonly used for long-distance power transmission because it cannot be easily transformed into different voltages, and it experiences more energy loss over distance.

However, DC is used in some specialized applications, such as in batteries and electronic devices.

Hybrid and oscillating currents are not typically used for power transmission.

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The visible region of the electromagnetic spectrum ranges from higher frequency/shorter wavelength violet to lower frequency/longer wavelength red.

The collection of all EM radiation types is known as the electromagnetic (EM) spectrum. Radio waves from a radio station and visible light from a lamp in your home are two examples of electromagnetic radiation. The energy that is flowing and dispersing is known as radiation.

Emissions of electromagnetic radiation are produced when an atom absorbs energy. The energy is absorbed, and as a result, one or more electrons relocate within the atom. When an electron returns to its initial position, an electromagnetic wave is produced.

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Answer:

Time

Explanation:

The total amount of energy transferred by an appliance depends on power and time.

Power is rate of  doing work or rate of consumption of energy .It's unit is watt.

So p = E/t

Where, P = Power

E = Energy consumed

t = time taken

so , E = p x t

Hence energy  transferred depends on power and time . The unit of electrical energy consumed is  watt-second or joules. It's commercial unit is kWh(kilowatt-hours). The less the time taken by an appliance to do the work , the more is the power of the appliance

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In 1801, Italian astronomer Giuseppe Piazzi discovered a large, rocky body orbiting the sun, which he named Ceres.

This celestial object was found to be part of a group of similar rocky bodies traveling in the same orbit, known as the asteroid belt. The asteroid belt is located between the orbits of Mars and Jupiter and is comprised of numerous irregularly shaped objects, primarily composed of rock and metal. These objects, referred to as asteroids, vary in size and can range from a few meters to several hundred kilometers in diameter.

Piazzi's discovery of Ceres marked the first time an asteroid was identified and it subsequently led to the observation of many more objects within the asteroid belt. This region in our solar system has since become a subject of significant interest and study, as it provides valuable information on the formation and evolution of the solar system. Additionally, understanding the composition and characteristics of asteroids has practical implications, as it aids in predicting and mitigating potential threats posed by near-Earth objects.

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Options A, B & D are true.

We are dealing with the concept of inertia.

This means that inertia is the force that keeps an object at rest or in constant motion.

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Answer:

the first question is B, if not then its C

Explanation:

sorry if I am wrong

Answer:

The wavelength of the wave would increase to 10 meters.

Explanation:

We can use the formula:

velocity = frequency × wavelength

to relate the velocity, frequency, and wavelength of a wave.

Given that the wave has a speed of 20 m/s and a wavelength of 5 meters, we can solve for its frequency as follows:

frequency = velocity ÷ wavelength = 20 m/s ÷ 5 meters = 4 Hz

Now, if the same wave is created in the same medium, but with half the original frequency, its new frequency will be:

new frequency = 4 Hz ÷ 2 = 2 Hz

To find the new wavelength of the wave, we can rearrange the formula above to solve for wavelength:

wavelength = velocity ÷ frequency

Using the new frequency of 2 Hz, we get:

new wavelength = 20 m/s ÷ 2 Hz = 10 meters

Therefore, if the same wave was created in the same medium, with half the original frequency, the wavelength of the wave would increase to 10 meters.

Answer:

14 miles per hour

Explanation:

You have to divide 56 miles by four hours to get 14 miles per hour

Decrease

The mathematical relationship between heat, internal energy and work done by the system is given as:

△U = Q + W

where △U is the change in the internal energy

W is the workdone by the system

Q is the heat energy in the system

Since the workdone by the system is negative, when a system does work, there is a depletion in the amount of energy possessed by the system.

Due to this loss of energy by the system as a result of the workdone, the internal energy decreases.

A girl pulls her school box with force of 78N inclined at 27 degrees to the ground.  The part of the force moving the box along the ground will be 35.1 N

there will be two components of forces :

vertical as well as horizontal component

vertical component = F sin ( 27 )

horizontal component = F sin ( 27 ) = 78 sin ( 27 )

                                                          = 35.1 N  

The part of the force moving the box along the ground will be 35.1 N

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It will take approximately 2.19 seconds for the boat to reach the dock.

To find the time it takes for the boat to reach the dock, we can use the following kinematic equation:

d= ut +1/2 at²

Where:

d = distance traveled (12 meters)

u = initial velocity (0 m/s since the boat is stationary)

a = acceleration (5.0 m/s²)

t = time

Substituting the given values into the equation, we have:

12=0⋅t+ 1/2 5 t²

Simplifying the equation, we get:

12= 5/2 T²

Multiplying both sides by 2/5.0, we get:

2/5 . 12 = t²

Simplifying further:

4.8=t²

t= 2.19

Therefore, it will take approximately 2.19 seconds for the boat to reach the dock.

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Answer:

Concave lens is also known as diverging lens because it diverge the parallel beam of light after reflect through it.

Answer:

Its being pushed.

Explanation:

There is no air but its being pushed by the flames coming from the rocket.

The value of the mean of all values of d (Hd) is -0.04.

As per data the following temperatures,

Temperature (°F) at 8 AM 98.3

Temperature (°F) at 12 AM 99.1 98.8 99.2 97.1 97.4 97.8 97.2

Temperature (F) at 8 AM 99.3 98.8 97.6 97.7 97.1

Temperature (°F) at 12 AM 99.1 99.2 97.8 972 97.4

Let the temperature at 8 AM be the first sample, and the temperature at 12 AM be the second sample. Then,

d = x₂ - x₁

Now, we need to find the values of d for all five subjects.

Therefore, d is as follows:

d₁ = 99.3 - 99.1

   = 0.2

d₂ = 98.8 - 99.2

    = -0.4

d₃ = 97.6 - 97.8

    = -0.2

d₄ = 97.7 - 97.2

   = 0.5

d₅ = 97.1 - 97.4

    = -0.3

In general, Hd represents the mean of all values of d.

Thus, the value of Hd is:

Hd = (0.2 + -0.4 + -0.2 + 0.5 + -0.3) / 5

     = -0.04

Thus, the value of Hd is -0.04.

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The hint given suggests solving integrals of the form ∫[−∞, ∞] e^-(ax²+bx) dx, which will be encountered during the Fourier transform process. The final solution will be in terms of the normalized constant A, the parameter a, and time t.

To normalize ψ(x,0), we need to find the value of A. Using the normalization condition, we get:

1 = ∫ψ*ψ dx from -infinity to infinity

1 = ∫|A|^2 e^-2ax dx from -infinity to infinity

1 = |A|^2/2a

|A|^2 = 2a

A = sqrt(2a)

Now, to find ψ(x, t), we need to apply the time-dependent Schrödinger equation. We have:

ψ(x, t) = (1/sqrt(2π)) ∫Φ(k) e^(i(kx-wt)) dk

where Φ(k) is the Fourier transform of ψ(x, 0). Using the Fourier transform, we get:

Φ(k) = (1/sqrt(2π)) ∫ψ(x, 0) e^(-ikx) dx

Φ(k) = (1/sqrt(2π)) ∫sqrt(2a) e^-ax e^(-ikx) dx

Φ(k) = sqrt(2a/(π(a^2+k^2)))

Substituting this in the expression for ψ(x, t), we get:

ψ(x, t) = (1/π^(1/4)) (a/π)^(1/4) ∫ e^(-(a^2+k^2)(x^2+w^2t^2)/4+ikx-wt) dk

This integral can be solved using the Gaussian integral formula:

∫ e^(-ax^2) dx = sqrt(π/a)

After solving the integral, we get:

ψ(x, t) = (a/π)^(1/4) e^(-a(x-wt)^2/2)


The hint given suggests solving integrals of the form ∫[−∞, ∞] e^-(ax²+bx) dx, which will be encountered during the Fourier transform process. The final solution will be in terms of the normalized constant A, the parameter a, and time t.

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Answer:

3m/s^2

Explanation:

acceleration=velocity/time

acceleration= 30/10=3m/s^2