the magnetic field perpendicular to a circular wire loop 7.2 cm in diameter is changed from 0.30 t to -0.47 t in 140 ms , where means the field points away from an observer and - toward the observer. Calculate the induced emf. Express your answer using two significant figures. In what direction does the induced current flow?

Aproximately 1.09 m/s was the locust's first speed.

In engineering mechanics, vectors are used to express values with both a magnitude and a direction. For analysis, vector representations of a variety of engineering quantities—including forces, displacements, velocities, and accelerations—are required.

Δy = vsin(θ)t - 0.5gt²

0 = v*sin(55°)t - 0.5(-9.81 m/s²)*t²

t = 2vsin(55°)/g

Now, we can use the horizontal motion of the locust to find the initial velocity v. The horizontal distance traveled by the locust is given by:

Δx = v*cos(55°)*t

Substituting the expression for t that we just found:

0.750 m = vcos(55°)2vsin(55°)/g

Solving for v:

v = √(0.750 mg/(2sin(55°)*cos(55°)))

v ≈ 1.09 m/s

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Answer:

3690 Newton

Explanation:

By using the F=ma formula we can find the Force if we know the mass and acceleration, so:

F= 180kg*20.5m/s^2

F=3690 kg*m/s^2 or 3690N

Answer:

For B it is 0

Explanation:

I think

Answer:

C

Explanation:

The law of conservation of energy determines that energy cannot be created or destroyed.

Answer:

900 Grams

Explanation:

The time taken, and the distance travelled by the car before stop, will be 5.3 second and -53.3 m west.

The length of the path traveled by the body is known as the distance covered by the body.

Distance is a 1-dimensional phenomenon. its unit is a meter(m). The distance can be found by the product of velocity and time.

The given data in the problem will be

u is the initial velocity =20m/sec

t is the time =?

d is the distance =?

From the Newtons second law;

\(\rm F \triangle t = \triangle P \\\\ \triangle t = \frac{\triangle P }{F} \\\\ \triangle t = \frac{m(v_f-v_i)}{F} \\\\ \ \triangle t = \frac{2240 (0-20))}{8410} \\\\ \triangle t = 5.3 \ sec \\\\)

The distance travelled before the car stop is,

\(\rm \triangle t = \frac{1}{2} (v_f+v_i)\traingle t \\\\ \traingle x = \frac{1}{2} (-20+0)5.3 \\\\\ \triangle x= -53.3 m \ west\)

Hence,the time taken, and the distance travelled by the car before stop, will be 5.3 second and -53.3 m west.

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The concept of the centrifugal force is used for producing an effective imitation of gravity. It is an important concept in the mechanics.

when any body is executing circular motion about a fixed axis, an outward force act on that object to balance the body and to execute the circular motion. The outward force is known as the centrifugal force.

It is the pseudo force act in order to balance the centripetal force acting inward during the circular motion.

The centrifugal force is comes into the picture when any body executes circular motion about a fixed axis.

To simulate gravity for the inhabitants, the concept of the centrifugal force is used.

Hence, the concept of the centrifugal force is used for producing an effective imitation of gravity.

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Answer:

the answer is b because an object in motion stays in motion

The water likely spilled because of inertia of motion such that an object in motion tends to stay in motion. So, option B is correct.

Inertia is defined as the property of matter by which it tends to continue its state of rest or uniform motion.

Here,

When you are travelling in a car, holding a cup of water in one hand and the driver of the car is forced to stop suddenly so that the water in the cup gets spilled out.

When the car was moving, the water in the cup was actually at the same speed relative to the car and cup. When the car is tend to stop suddenly, this causes a sudden change in acceleration of the car and thus the cup. As a result, the water in the cup spills out. This is due to the property of inertia that the water got spilled out.

According to the law of inertia, a body will preserve its state of rest or uniform motion unless an external force acts on it.

Here, the spilling out of water is the application of inertia of motion. That means the the water inside the cup which was moving forward and when the change in acceleration occurred, it got spilled in front of you thus tending to continue its state of motion.

Hence,

The water likely spilled because of inertia of motion such that an object in motion tends to stay in motion.

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when Force (N) is 10.0 Length (m) is 0.60

when Force (N) is 8.0 Length (m) is 0.40

when Force (N) is 4.0 Length (m) is 0.20

when Force (N) is 4.0 Length (m) is 0.20

when Force (N) is 2.0 Length (m) is 0.10

chatgpt

49. To find the length of a pendulum that has a period of 2.3 seconds on the Moon, where the gravitational acceleration (g) is 1.6 N/kg, we can use the formula:

Period (T) = 2π√(Length (L) / g)

Substituting the given values:

2.3 = 2π√(L / 1.6)

To solve for L, we can rearrange the formula:

L = (2.3 / (2π))^2 * 1.6

L ≈ 0.781 meters (or 78.1 centimeters)

So, the pendulum must be approximately 0.781 meters (or 78.1 centimeters) long to have a period of 2.3 seconds on the Moon.

50. Ranking Task:

To rank the pendulums according to their periods, we need to consider both the length and mass of each pendulum.

Ranking from least to greatest period:

1. A: 10 cm long, mass = 0.25 kg

2. C: 20 cm long, mass = 0.25 kg

3. B: 10 cm long, mass = 0.35 kg

There is a tie between pendulums A and C, as they have the same length but different masses.

Answer:

pf = 3750000 kg.m/s

F = 175000 N

Explanation:

Constant Acceleration

An object moves with constant acceleration if its velocity changes uniformly in time.

If we call vo to the initial speed, vf the final speed, and t the time, then the acceleration is calculated as:

\(\displaystyle a=\frac{v_f-v_o}{t}\)

The new stealth helicopter was traveling at vo=180m/s and changed to vf=250 m/s in t=6 seconds, thus the acceleration was:

\(\displaystyle a=\frac{250-180}{6}\)

\(a=11.67~m/s^2\)

Please note this number is shown rounded to the nearest hundredth, but it was stored in the calculator's memory with full precision. This fact affects the next calculation as will be noted below.

The acceleration must be produced for some net force that can be calculated by:

F = m.a

Where m=15000 Kg is the mass of the helicopter. Thus:

F = 15000 * 11.67

F = 175000 N

The above product would lead to the inaccurate result of 175050 if the acceleration would have not used with its full representation in the calculator's memory.

The momentum of an object of mass m and velocity v is:

p = m. v

The final momentum of the helicopter is:

pf = m.vf = 15000*250 m/s

pf = 3750000 kg.m/s

Note: When performing calculations over intermediate results, it's important to keep them as accurate as possible to preserve the accuracy of the final result.

The energy lost to friction and air resistance is 186 J.

option B.

The energy lost to friction and air resistance is calculated from the change in the mechanical energy of the pendulum.

The initial potential energy of the pendulum at the initial position is calculated as;

PEi = mghi

where;

P.Ei = 12 kg x 9.8 m/s² x 20 m

P.Ei = 2,352 J

The final kinetic energy of the pendulum is calculated as follows;

K.Ef = 0.5 x 12 kg x (19 m/s)²

K.Ef = 2,166 J

ΔE = 2,166 J - 2,352 J

ΔE = -186 J

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Answer: B

Explanation: A P E X

The sentence best describes how the concentration of the reactant changed is it decreased gradually as the reaction progressed.

The correct option is B.

The chemical reaction is the reaction between two reactants which led to the formation of products.

The products are substances which forms after reaction. The reactants are the substances which are original materials.

This graph shows how the concentration of a reactant changed during a chemical reaction.

The sentence best describes how the concentration of the reactant changed is it decreased gradually  as the reaction progressed.

Thus, the correct option is B.

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These are the absorption of energy by electrons.

What is electron?

The electrons are an atom's negatively charged building blocks. An atom's entire population of electrons comes together to create a negative charge that balances out the positive charge of the protons in the atomic nucleus. Electrons are incredibly little compared to all the other atom's parts.

What is atom ?

A negatively charged electron or electrons surround the core nucleus of an atom, which is made up of one or more of them. Protons and neutrons, which are comparatively heavy particles, are present in the positively charged nucleus in one or more quantities.

We call the shell is complete if they have 2 electrons ( in the first shell only) called duplet or 8 electrons ( in any shell except the first ) called octate.

1) In the first figure, the duplet is complete. ( 2 electrons in the first shell). But the second one has only 4 and octate is incomplete, still the third shell has one electron. So this is the excited state.

2) In second picture, first shell has only one electron and duplet is not complete. Still the second shell has two electrons. This is the excited state.

3) In third picture, first shell has completed duplet and second shell has completed the octate. But third shell is not completed. Still the forth shell has three electrons. So, this is also the excited state.

4) Forth picture has complete duplet and complete octate. Higher shells have no electrons. So, this is not excited state.

5) In fifth picture also, atom has completed duplet and octate. Higher orbit ( third ) has two electrons. Though, the octate is complete, higher shells have no electrons. So this is not a excited state.

Therefore, these are the absorption of energy by electrons.

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The magnitude of the electric flux through the sheet is 4.05 N m² C⁻¹ (Option E).

The electric flux through a surface is given by the product of the electric field strength and the area of the surface projected perpendicular to the electric field.

In this case, the electric field strength is 18 N C⁻¹, and the area of the sheet projected perpendicular to the electric field is 0.450 m²

(since the normal to the sheet makes an angle of 60° with the electric field). Multiplying these values gives the electric flux:

Electric flux = Electric field strength × Area

Electric flux = 18 N C⁻¹ × 0.450 m²

Electric flux = 8.1 N m² C⁻¹

In summary, the magnitude of the electric flux through the sheet is 4.05 N m² C⁻¹. This value is obtained by multiplying the given electric field strength by the projected area of the sheet perpendicular to the electric field.

The angle of 60° is taken into account to determine the effective area for calculating the flux.(Option E).

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Answer:

the answer is B.

Answer:

light

Explanation:

you can see stuff in space but cant hear it

Explanation:

If the kinetic energy of an object is given and we need to find its velocity of motion, then we can find it by using the formula of kinetic energy as :

\(K=\dfrac{1}{2}mv^2\)

m is mass of the object

We can rearrange the above equation such that,

\(v=\sqrt{\dfrac{2K}{m}}\)

Hence, this is the velocity at the end of a rollercoaster ride.

We are given the following number in scientific notation:

To convert this number into standard form we will move the decimal point a number of times equal to the exponent of the ten. Since the exponent is positive we will move the point to the right, like this:

Therefore, the standard form of the number is 800.90

Answer:

Recycling is the action or process of converting waste into reusable material. Recycling can be done in many different ways such as using Coca-Cola tin cans and cutting them in half to design a pencil holder. Or it may be also cutting a flat waste wood-building piece to design a chair. Or may be recycling plastic water bottles to use them again.

Explanation:

The thermosphere has the highest temperature of any layer in Earth’s atmosphere.

The term troposphere is the region that is found  12 to 50 kilometers from Earth’s surface. This region is found to be the region where you can find a lot of gases.

Both the Troposphere and the stratosphere  get colder as altitude increases. However, the ozone in the stratosphere  protects people from ultraviolet (UV) radiation.

The thermosphere has the highest temperature of any layer in Earth’s atmosphere.

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The net force on particle q₂, located between particles q₁ and q₃, is approximately 189000 N. The force exerted by particle q₁ on q₂ is positive and equals 252000 N, while the force exerted by particle q₃ on q₂ is negative and equals -63000 N.

To find the net force on particle q₂, we need to calculate the individual forces exerted on q₂ by particles q₁ and q₃ and then determine their sum.

The force between two charged particles can be calculated using Coulomb's law:

F = k * |q₁ * q₂| / r²

Where F is the force between the particles, k is the electrostatic constant (k ≈ 9.0 x \(10^9\) Nm²/C²), q₁ and q₂ are the charges of the particles, and r is the distance between them.

First, let's calculate the force exerted on q₂ by q₁:

F₁₂ = k * |q₁ * q₂| / r₁₂²

F₁₂ = (9.0 x \(10^9\) Nm²/C²) * |(8.0 μC) * (3.5 μC)| / (0.10 m)²

F₁₂ ≈ 252000 N

The force is positive because q₁ and q₂ have opposite charges.

Next, let's calculate the force exerted on q₂ by q₃:

F₂₃ = k * |q₂ * q₃| / r₂₃²

F₂₃ = (9.0 x \(10^9\)Nm²/C²) * |(3.5 μC) * (-2.5 μC)| / (0.15 m)²

F₂₃ ≈ -63000 N

The force is negative because q₂ and q₃ have the same charge.

Finally, we can find the net force on q₂ by summing the individual forces:

Net force = F₁₂ + F₂₃

Net force = 252000 N + (-63000 N)

Net force ≈ 189000 N

The net force on particle q₂ is approximately 189000 N.

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The insights to be used in creating a primary message is that; Electric vehicle demand is skyrocketing. Option C

We can see that the demand for electric vehicles has increased in the recent times. Why has the demand for electric vehicles increased? We know that in the recent times there has been a push for the use of cleaner energy.

This has made a strong impressions upon governments around the would and has led to an increase in the rate at which any kind of research that tries to fund the use of devices that use alternative energy to fossil fuels is concerned.

As a result of this, there has been an increase in the demand and the use of the electric vehicles especially in the developed countries where more people can be able to afford the vehicles.

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The speed of the box 2.8 s after you started pushing on it is 9.1 m/s.

The gravitational force is a force of attraction that attracts all the physical forms having mass.

Given, gravitational force on the box is 29.4 N.

At the instant you start pushing the box, normal force is equal in magnitude to the gravitational force, which is 29.4 N. Given, frictional force 13.0 N, so : Fnet = 23.0 sin 45 - 13.0 - 29.4 = -9.7 N

d = (1/2)at² = (1/2)(-9.7/3.0)(2.8)^2 = -27.1 m.

Negative sign indicates that the box has moved in opposite direction to the force you applied.

As, v² = u² + 2as,

v = sqrt(2as) = sqrt(2(9.7/3.0)(27.1)) = 9.1 m/s.

Therefore, the speed of the box 2.8 s after you started pushing on it is 9.1 m/s.

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Answer:

please I do not understand that question

We have that the  the strength of the force between the Sun and the moon  is mathematically given as

F2=0.12140F1N

Question Parameters:

Distance between the Earth and the Sun were increased by a factor of 2.87,

Generally the equation for the  Gravitational Force   is mathematically given as

\(F=\frac{Gm1m2}{d^2}\\\\Where\\\\f1/f2=d1^2/d2^2\\\\Therefore\\\\F2=\frac{F1*d1}{3.23^2}\\\\F2=\frac{F1*1}{2.87^2}\\\\\)

F2=0.12140F1N

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(a) The equation for the work done in stretching the spring from x1 to x2 is ¹/₂K₂Δx².

(b) The work done, in stretching the spring from x1 to x2 is 11.25 J.

(c) The work, necessary to stretch the spring from x = 0 to x3 is 64.28 J.

The work done in stretching the spring is calculated as follows;

W = ¹/₂kx²

W(1 to 2) = ¹/₂K₂Δx²

where;

W(1 to 2)  =  ¹/₂(250)(0.65 - 0.35)²

W(1 to 2)  = 11.25 J

W(0  to 3) = ¹/₂k₁x₁² + ¹/₂k₂x₂² + ¹/₂F₃x₃

where;

W(0  to 3) = ¹/₂(660)(0.35)² + ¹/₂(250)(0.65 - 0.35)² + ¹/₂(105)(0.89 - 0.65)

W(0  to 3) = 64.28 J

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Answer:

a).\($3.99 \times 10^5 \ v/m$\)

b). 2.9925 kV

Explanation:

Given :

For mass spectrometer

The magnetic field = B

B = 0.105 T

a).  Given speed, v = \($3.8 \times 10^6 \ m/s$\)

We known

\($\frac{E}{B}=v$\)

∴ \($E= 3.8 \times 10^6 \times 0.105$\)

      \($=3.99 \times 10^5 \ v/m$\)

b). Now spectrometer, d = 0.75 cm

                                      \($d=0.75 \times 10^{-2} \ m$\)

We known

\($E=\frac{V}{d}$\)

\($V = E\times d$\)

\($V = 3.99 \times 10^5 \times 0.75 \times 10^{-2}$\)

\($V = 2.9925 \times 10^3 \ V$\)

   = 2.9925 kV