A _________________ is one that forms where rays converge

Answer:

see below

Explanation:

:) A loop of wire carries a conventional current of 0.5 amperes. The radius of the loop is 0.06 m. Calculate the magnitude of the magnetic field at a distance of 0.32 m along the axis of the loop, from the center of the loop.

Radioactivity is a nuclear phenomenon. It is the process of spontaneous emission of α (alpha particles) or β (beta particles) and γ (gamma particles ) radiations from the nucleus of atoms during their decay.

Explanation:

Answer:

radioactivity is the act of emitting radiation spontaneously. This is done by an atomic nucleus that, for some reason, is unstable; it "wants" to give up some energy in order to shift to a more stable configuration.

Explanation:

Answer: 1.5 N/cm

Explanation: is it correct

The Spring Constant is  147 N/m.

The definition of force in physics is: The push or pull on a massed object changes its velocity.

An external force is an agent that has the power to alter the resting or moving condition of a body. It has a direction and a magnitude.

A spring balance can be used to calculate the Force. The Newton is the SI unit of force.

Given parameters:

Initial length of the spring = 0.400 m.

Final length of the spring = 0.450 m.

Change in length: Δx = 0.450 m - 0.400 m = 0.050 m.

Mass of the hung object = 0.750 kg.

Weight of the hung object: w = 0.750 × 9.8 N = 7.35 N

Hence, from Hooke's law,

the Spring Constant is = Weight of the hung object / Change in length

= 7.35 N / 0.050 m

= 147 N/m.

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[tex]\tt \rho=\dfrac{m}{V}[/tex]

ρ =  density

m = mass

V = volume

input the value:

[tex]\tt \rho=\dfrac{390}{20.2}=19.3~g/cm^3[/tex]

Answer: 27˚

Explanation:

The sum of the angles in any triangle will always be 180˚. We know that two of the angles measure 63˚ and 90˚. So we can setup a simple equation to find x:

x + 63 + 90 = 180

x = 27˚

Answer:

im not sure if this is right but i would do the 90 degrees and the 63 degrees  so 90-63=27 degrees but im not sure

Explanation:

Answer:

zero

Explanation:

zero, because no displacement

(a) The magnitude of the electric field of the material is 600 V/m.

(b) The magnitude of the electric field of the material in the presence of dielectric constant is 176.5 V/m.

The magnitude of the electric field of the material is calculated as follows;

E = V/d

where;

Substitute the given parameter into the equation above.

E = 1.5/(2.5 x 10⁻³)

E = 600 V/m

E = E₀/k

E = 600/3.4

E = 176.5 V/m

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The electric field strength at the point where 50 µC charge experienced an attractive force of 2.0 N is 4×10⁴ N/C

This is simply defined as the force per unit charge. Mathematically, it is expressed as:

E = F / Q

Where

From the question given above, the following data were obtained:

E = F/Q

E = 2 / 50×10¯⁶

E = 4×10⁴ N/C

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The resistance of the thermometer at room temperature is 15.04 ohms.

A resistance thermometer is a type of thermometer that measures temperature through a change in resistance.

To calculate the resistance of the thermometer at room temperature, we use the formula below.

Formula:

Where:

Make x the subject of the equation

Hence, The resistance of the thermometer at room temperature is 15.04 ohms.

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Answer: 33.7kg

Explanation:

Using Newton's 2nd Law, the force of gravity is equal to the mass times the acceleration:
[tex]F=ma[/tex]

The force would be the weight due to the gravitational field. And the acceleration would be the one due to gravity:

[tex]330N=m(9.8m/s^2)[/tex]

[tex]m=330/9.8[/tex]

[tex]m=33.7kg[/tex]

Answer:

Homogenous Mixture

Explanation:

When the scientist heated sugar and water, until the sugar was completely dissolved, then the mixture is a homogeneous mixture, also known as a solution.

A mixture is a combination of two or more substances that are physically combined in a way that each retains its own identity and properties. The substances that make up a mixture are called components or constituents, and they can be either elements or compounds.

Mixtures can be classified as homogeneous or heterogeneous, depending on whether the components are uniformly distributed or not.

In a homogeneous mixture, the components are evenly distributed throughout the mixture, resulting in a uniform composition and appearance.

In a heterogeneous mixture, the components are not uniformly distributed, and the mixture may contain visible boundaries or phase separations.

Mixtures can be created by mixing substances together using physical methods, such as stirring, shaking, or heating. Unlike chemical reactions, which involve the formation of new substances with different properties, mixtures can be separated back into their individual components by physical means, such as filtration, evaporation, or distillation.

Here in the question,

The mixture created from the water and sugar solution is a homogeneous mixture, also known as a solution. In a homogeneous mixture, the components are uniformly distributed throughout the mixture, resulting in a uniform composition and appearance. In this case, the sugar molecules are evenly dispersed throughout the water molecules, creating a clear and transparent solution.

Therefore, The mixture created from the water and sugar solution is a homogeneous mixture,

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Answer: 136 Newtons (136N)

Explanation:

Newton's Law of Gravitation states that the gravitational force is proportional to the masses of the two objects, and their separation distance between them. The proportionality constant is called Newtons constant denoted as capital 'G':

[tex]F=GMm/r^2[/tex]

Now, due to Newton's 2nd Law of motion, we know that a net force acting on an object causes an acceleration. We can also say that the force is:

[tex]F=ma[/tex]

Setting both of these equations equal to each other, we get:

[tex]ma=GMm/r^2[/tex]

The smaller 'm' will cancel giving that the acceleration is:

[tex]a=GM/r^2[/tex]

This is the equation which gives the gravitational field created from a source mass 'M'. To find the weight, find the product between the test mass and the gravitational field created by the source mass:

[tex]Weight=mass*acceleration[/tex]

[tex]W=ma[/tex]

[tex]W=(85kg)(1.6m/s^2)[/tex]

[tex]W=136N[/tex]

The units are Newtons due to weight being a force.

Answer:

B

Explanation:

parallel circuits required m

Answer :

An electric force is the attracting or repulsive interaction between any two charged things. Newton's laws of motion, like any other force, define its influence on things.

Explanation:

The area of the coil must be 7.6 x 10⁻⁴ m².

The peak emf induced in a coil is determined by applying Faraday's law of electromagnetic induction as shown below;

emf(peak) = NBAω

Where;

[tex]\omega = 400 \ \frac{rev}{ s} \times \frac{2\pi \ rad}{1 \ rev} \ = 2,513.6 \ rad/s[/tex]

[tex]A = \frac{emf (peak)}{NB\omega} \\\\A = \frac{4.2}{55 \times 0.04 \times 2,513.6} \\\\A = 7.6 \times 10^{-4} \ m^2[/tex]

Thus, the area of the coil must be 7.6 x 10⁻⁴ m².

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Answer: Because the hunter will try to aim at the fish, but the image of fish he sees is actually the apparent image of the fish at a location.

Heres an image to help

Hope this helps!

Answer:

5.98 m

Explanation:

[tex]T=2\pi \sqrt\frac{L}{g}[/tex]

[tex]T^2=4\pi ^2L/g\\L = gT^2/(4\pi^2)[/tex] = 11.15*4.6²/(4π²) = 5.98 m

Given what we know, we can confirm that the bands indicate that the canyon was carved due to erosion caused by moving water.

The bands are the result of sediments being deposited as the canyon was being formed. These sediments are deposited by the running water that carves the canyon. This results in horizontal bands that can tell us much about the history of the canyon as well as the river that formed it.

Therefore, we can confirm that the bands indicate that the canyon was carved due to erosion caused by moving water.

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Answer:

rawr

Explanation:

Answer:

Impulse is 0.4 x 18= 7.2

Explanation:

Impulse is defined as the integral of force over the time duration. When you do the integration of Newtons second law, momentum is

[tex]\int\limits^a_b {F} \, dt =\int\limits^a_b {\frac{dp}{dt} } \, dt[/tex]

= Δp

If momentum p is defined as the integral of force per unit time, then we can take the area under the curve to find momentum, as the area under the curve can approximate the integral of the function.

Therefore, to quickly summarize, taking the maximum force, 18N , multiplied by duration of the interaction, which is 0.5s-0.1s=0.4s, will give your momentum, in the units of  kg•m/s.

Hope that helps!

A open system that is open to its surroundings can trade both matter and energy.

Both matter and energy can be transferred between an open system and its surroundings. The stovetop example would be regarded as an open system because heat and water vapour might be lost to the atmosphere. On the other hand, a closed system can only exchange energy, not matter, with the environment.

A closed system is a type of thermodynamic system in which mass is conserved within the system's boundaries but energy can easily enter or leave the system. Depending on what is being exchanged, the interactions between the system and its environment alter.

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Answer: C

Explanation:

i just took it

Answer:

D.

Explanation:

the required angle is ∠PRS (for more info see the attachment), then it is D.

Answer: D

Explanation:

Answer:

Domestic gadgets like the mixer-grinders, pressure cookers, desert coolers, air- conditioners, exhaust fans, vacuum cleaners, sewing and washing machines are all indoor sources of noise pollution.

Explanation:

Answer:

hi-

Explanation:

During the early teenage years, friendships become more intense, close and supportive. The amount that teenagers communicate with their friends increases. Teenage friendships tend to be based on personal similarity, acceptance and sharing. Same gender friendships are most common during the early high school years.

Consult the attached free body diagram.

By Newton's second law, the net force on the crate acting parallel to the surface is

∑ F[para] = (370 N) cos(-20°) - f = 0

(this is the x-component of the resultant force)

where

• (370 N) cos(-20°) = magnitude of the horizontal component of the pushing force

• f = magnitude of kinetic friction

The crate is moving at a constant speed and thus not accelerating, so the crate is in equilibrium.

Solve for f :

f = (370 N) cos(-20°) ≈ 347.686 N

The net force acting perpendicular to the surface is

∑ F[perp] = n - 1480 N - (370 N) sin(-20°) = 0

(this is the y-component of the resultant force)

where

• n = magnitude of normal force

• 1480 N = weight of the crate

• (370 N) sin(-20°) = magnitude of the vertical component of push

The crate doesn't move up or down, so it's also in equilibrium in this direction.

Solve for n :

n = 1480 N + (370 N) sin(-20°) ≈ 1606.55 N ≈ 1610 N

Then the coefficient of kinetic friction is µ such that

f = µn   ⇒   µ = f/n ≈ 0.216

Answer:

Key Points

When an object is spinning in a closed system and no external torques are applied to it, it will have no change in angular momentum.

The conservation of angular momentum explains the angular acceleration of an ice skater as she brings her arms and legs close to the vertical axis of rotation.

If the net torque is zero, then angular momentum is constant or conserved.

Key Terms

quantum mechanics: The branch of physics that studies matter and energy at the level of atoms and other elementary particles; it substitutes probabilistic mechanisms for classical Newtonian ones.

torque: A rotational or twisting effect of a force; (SI unit newton-meter or Nm; imperial unit foot-pound or ft-lb)

angular momentum: A vector quantity describing an object in circular motion; its magnitude is equal to the momentum of the particle, and the direction is perpendicular to the plane of its circular motion.Key Points

When an object is spinning in a closed system and no external torques are applied to it, it will have no change in angular momentum.

The conservation of angular momentum explains the angular acceleration of an ice skater as she brings her arms and legs close to the vertical axis of rotation.

If the net torque is zero, then angular momentum is constant or conserved.

Key Terms

quantum mechanics: The branch of physics that studies matter and energy at the level of atoms and other elementary particles; it substitutes probabilistic mechanisms for classical Newtonian ones.

torque: A rotational or twisting effect of a force; (SI unit newton-meter or Nm; imperial unit foot-pound or ft-lb)

angular momentum: A vector quantity describing an object in circular motion; its magnitude is equal to the momentum of the particle, and the direction is perpendicular to the plane of its circular motion.

Explanation:

Answer:

Time begins, Formation of subatomic particles, Formation of Atoms, Formation of stars, Formation of Galaxies

Explanation:

At the beginning right after the big bang time starts then sub-atomic particles forms i.e. protons, neutrons from this atoms form and after that stars and galaxies form.

(i) The direction of the current will be in opposite direction to the magnetic field.

(ii) The magnitude of the emf induced in the circuit is 0.359 V.

(iii) The induced current if the circular coil is 0.048 A.

b(i) The magnetic flux linkage through the coil is 1.41 x 10⁻⁴ Tm².

b(ii) The radius of the coil is r√3 m.

The direction of the current will be in opposite direction to the magnetic field.

Initial area of the coil = (πd²)/4

Initial area of the coil = (π x 0.225²)/4 = 0.0398 m²

Final area of the coil = (π x 0.072²)/4 = 0.001296 m²

[tex]emf = \frac{NB(A_1 - A_2)}{t} \\\\emf = \frac{14 \times 1.2(0.0398 - 0.001296)}{1.8} \\\\emf = 0.359 \ V[/tex]

I = emf/R

I = 0.359/7.5

I = 0.048 A

Ф = LI

Ф = 0.015 x 0.0094

Ф =  1.41 x 10⁻⁴ Tm²

[tex]L = \frac{\mu_o N^2\pi r^2}{l} \\\\r^2 = \frac{Ll}{\mu_o N^2\pi } \\\\r = \sqrt{\frac{Ll}{\mu_o N^2\pi } } \\\\r = \sqrt{\frac{0.015(l)}{4\pi\times 10^{-7} \times (420)^2 \pi } } \\\\r = 3 \sqrt{l} \ m[/tex]

where;

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