Based on their locations on the periodic table, which two elements would you
expect to form positive ions with a +3 charge?
O A. Nitrogen, N
O B. Aluminum, Al
O C. Phosphorus, P
D. Boron, B

Rated

A t-rated switch may be used to (its/a) Rated current capacity current capacity when controlling an incandescent lighting load.

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For 10-MeV neutrons, the difference in speeds between classical and relativistic kinematics is not large, but the relativistic kinetic energy must be used in order to be accurate.

Reactors are designed to sustain and control nuclear chain reactions for generating power, and in fission reactions, neutrons with energies up to 10 MeV are produced. These fast neutrons are used to initiate fission in the nuclei of fissionable materials. In order to calculate the velocity of neutrons, one must use the correct expression for kinetic energy.The classical kinetic energy expression, $KE=\frac{1}{2}mv^2$, is not valid for neutrons travelling at relativistic speeds. The relativistic energy expression for a particle with mass m and velocity v is $E=(mc^2)\sqrt{1-\frac{v^2}{c^2}}$, where c is the speed of light.In the case of 10-MeV neutrons, the difference in speeds between classical and relativistic kinematics is not large, but the relativistic kinetic energy must be used in order to be accurate.

Using the classical expression for kinetic energy would result in an error of less than 1%, but it is still important to use the correct expression when calculating the velocity of high-energy particles.

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The expected chain length (number of repeating units per chain) that would be formed in the experiment, assuming all initiators initiate chains and all monomers add onto the chains can be calculated using the following formula.

Expected chain length = (Number of moles of monomers used/Number of moles of initiators used) + 1Where,+ 1 denotes the length of the initiator's unit and is added to the average number of monomer units. Hence, it indicates the length of the polymer's first unit.The number of moles of monomers used can be determined as follows

The number of moles of initiators used can be determined as follows:Number of moles of initiators = (Mass of initiators used/Molecular weight of initiators)Example:If the mass of monomers used is 0.05 g and the molecular weight of monomers is 100 g/mol, then the number of moles of monomers used

= (0.05/100) mol

= 5 × 10⁻⁴ molIf the mass of initiators used is 0.01 g and the molecular weight of initiators is 200 g/mol

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Answer:

If the starting GPE is doubled than it's KE would also double.

B A Comet, hope this helps.

The Comet (B) is the object that develops a "tail" when it enters the inner solar system and the sun heats it up.

But it's really kind of weird to call it a "tail".  Once the comet passes closest to the sun and starts to head out of the solar system again, the so-called "tail" goes IN FRONT of it.

Hello!

We can use the following equation:

\(V = Ed\)

V = Potential Difference (V)

E = Electric Field (N/C)

d = distance between plates (m)

Begin by converting 4.1 mm to m.

1 mm = 0.001 m

4.1 mm = 0.0041 m

Now, we can solve for the electric field strength.

\(E = \frac{V}{d} = \frac{8.5}{0.0041} = \boxed{2037.17 \frac{N}{C}}\)

ANSWER

EXPLANATION

To find the wavelength of the wave, apply the formula for the speed of a wave:

where λ = wavelength

f = frequency

Therefore, by substituting the given values into the equation and solving for λ, the wavelength of the wave is:

That is the answer.

It takes the ball 3.06 seconds to reach its highest point

The time it takes for a ball to reach its highest point is given by the equation:

t = v / g

where

In this case, the initial velocity is 30.0 m/s and the acceleration due to gravity is \(9.8 m/s^2\). Therefore, the time it takes for the ball to reach its highest point is:

\(t = 30.0 m/s / 9.8 m/s^2 = 3.06 s\)

Therefore, it takes the ball 3.06 seconds to reach its highest point.

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Answer:

A blackbody, or Planckian radiator, is a cavity within a heated material from which heat cannot escape. No matter what the material, the walls of the cavity exhibit a characteristic spectral emission, which is a function of its temperature.

Example:

Emission from a blackbody is temperature dependent and at high temperature, a blackbody will emit a spectrum of photon energies that span the visible range, and therefore it will appear white. The Sun is an example of a high-temperature blackbody.

\(\qquad\) \(\purple{\twoheadrightarrow\pmb{AC= \sqrt{AB^{2} + BC^{2} -2AB\times BC\cos(\alpha)}}}\)

Substituting the data, we get the following:

\(\qquad\) \(\twoheadrightarrow\sf {AC= \sqrt{(4)^{2} + (6)^{2} -2(4)(6)\cos(60^{\circ})}}\)

\(\qquad\) \(\twoheadrightarrow\sf {AC= \sqrt{16+ 36 -48(1/2)}}\)

\(\qquad\) \(\twoheadrightarrow\sf {AC= \sqrt{52-24}}\)

\(\qquad\) \(\twoheadrightarrow\sf {AC= \sqrt{28}}\)

\(\qquad\) \(\twoheadrightarrow\sf {AC= 2\sqrt{7}}\)

\(\qquad\) \(\purple{\twoheadrightarrow\pmb{AC= 5.30\ cm}}\)

The minimum force (Fmin) required to move the block up the ramp is 12.7 N.

Mass of the block (m) = 3.3 kg

Angle of the ramp (θ) = 37°

Coefficient of friction between the block and the ramp (μg) = 0.44

Coefficient of kinetic friction between the block and the ramp (uk) = 0.30

Step 1: Resolve the forces acting on the block.

The weight of the block (mg) can be resolved into two components:

- The force acting parallel to the incline (mg*sinθ)

- The force acting perpendicular to the incline (mg*cosθ)

Step 2: Calculate the force of friction.

The force of friction can be calculated using the equation:

Force of friction (Ff) = μg * (mg*cosθ)

Step 3: Determine the minimum force required.

To move the block up the ramp, the applied force (Fapplied) must overcome the force of friction.

Thus, the minimum force required (Fmin) is given by:

Fmin = Ff + Fapplied

Step 4: Substitute the given values and calculate.

Ff = μg * (mg*cosθ)

Fmin = Ff + Fapplied

Now, let's calculate the values:

Ff = 0.44 * (3.3 kg * 9.8 m/s² * cos(37°))

Ff ≈ 12.717 N

Fmin = 12.717 N + Fapplied

Therefore, the minimum force (Fmin) required to move the block up the ramp is approximately 12.7 N.

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The rotational speed of the motor 3 in rpm. b. 92

The figure shows a hydraulic circuit that uses three chain conveyors. The torque that drives the motors is T: =1500 N.m. T2 =700 Nm and, T3 = 300Nm.The volumetric flow rate produced by the pump is 6.3 liters per minute. The displacement volume of the motors is V01 =1000 cm3/rev. V02 =1000 cm3/rev and, V09 =500 cm3/rex.

The motors have a volumetric efficiency of 0.9 and an overall efficiency of 0.85. The leakage of hydraulic motors 1 and 3 is internal completely, while the leakage of hydraulic motor 2 is external completely.The orifice of the flow control valve has a diameter of 0.5 mm. The capacity coefficient of the needle valve is 0.7.

The pressure losses through the pipes are ignored. The volumetric flow rate through the needle valve is Q = C × A2 × ΔP / ρ where C is the capacity coefficient, A is the area of the orifice, ΔP is the pressure difference through the needle valve, and ρ is the density of the fluid. The density of the oil used in the hydraulic system is 860 kg/m3. We need to determine the rotational speed of motor 3 in rpm.

So,Let’s first determine the volumetric flow rate required by hydraulic motor 3. Using the expression of volumetric flow rate through the needle valve, we have Q = C × A2 × ΔP / ρ… (i)We are given that the capacity coefficient of the needle valve is 0.7. Its orifice diameter is 0.5 mm.

Hence, the area of the orifice is given byA2 = π d2 / 4where d is the diameter of the orifice. So, A2 = π × (0.5 mm)2 / 4 = 0.196 mm2 = 1.96 × 10-7 m2Using equation (i), we haveQ = C × A2 × ΔP / ρNow, we will calculate ΔP. To do this, we need to determine the flow rates Q1, Q2, and Q3.Let Q’ be the total volumetric flow rate through the system.

Since the overall efficiency of the system is given as 0.85, we haveQ’ = 0.85 × 6.3 l/min = 5.355 l/min = 5.355 × 10-3 m3/minWe know that the volume of fluid passing through the hydraulic motors is equal to their displacement volume multiplied by the number of revolutions per unit time.So, we haveQ1 = V01 × n1 … (ii)Q2 = V02 × n2 … (iii)Q3 = V03 × n3 … (iv)where V01, V02, and V03 are the displacement volumes of hydraulic motors 1, 2, and 3, respectively.

We are given that V01 = V02 = 1000 cm3/rev and V03 = 500 cm3/rev, which gives V01 = V02 = 1 × 10-6 m3/rev and V03 = 0.5 × 10-6 m3/rev.Substituting equations (ii), (iii), and (iv) in equation (i), we haveQ = C × A2 × (Q1 + Q2 - Q3) / ρSolving for Q3, we getQ3 = (Q1 + Q2 - Q) / C × A2 × ρPutting the given values in the above expression, we haveQ1 = V01 × n1 = (1 × 10-6 m3/rev) × n1Q2 = V02 × n2 = (1 × 10-6 m3/rev) × n2Q3 = V03 × n3 = (0.5 × 10-6 m3/rev) × n3Q = 5.355 × 10-3 m3/min = 5.355 × 10-3 / 60 m3/s = 8.925 × 10-5 m3/sA2 = 1.96 × 10-7 m2C = 0.7ρ = 860 kg/m3

Substituting the above values, we get8.925 × 10-5 = (1 × 10-6 × n1 + 1 × 10-6 × n2 - 0.5 × 10-6 × n3) / (0.7 × 1.96 × 10-7 × 860)Solving for n3, we have n3 = 91.6 rpmSo, the correct option is b. 92.

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Answer:

6 also

Explanation:

Since Kinetic Energy and mass are directly proportional, as one increases, the other will increase with the same magnitude

A weight of mass 1.25 kg is suspended by a string wrapped around a pulley wheel, which consists of a solid disk of mass 4.54 kg and radius 0.528 m and the vertical distance s is 19.701 m.

To find the distance the given data are,

Mass suspended, m = 1.25 kg

Mass of the pulley, M = 4.54 kg

Radius of the pulley, r = 0.528 m

Let us consider the tension in the string be 'T'

therefore,

the net force in the vertical direction

mg - T = ma

where, g is the acceleration due to the gravity

a is the acceleration of the hanging mass.

Let, Torque on the pulley = Iα

where,

I is the moment of inertia of the pulley

α is the angular acceleration.

Thus, torque = T × r

also

α = a/r

and I = (Mr²/2) for the circular disc

on substituting the values in the above relation for torque, we get

T × r = (Mr²/2) × (a/r)

or

T = (Ma)/2

On comparing the values of T,

mg - [(Ma)/2] = ma

or

mg = a (M/2+m)

Substituting the values, we get

1.25×9.8 = a( 4.54 /2 + 0.528)

on simplifying the above equation,

12.25 = a 2.798

a = 4.378 m/s²

or

s = ut + 1/2 at²

where, s is the distance covered

u is the initial speed = 0 (for this case)

t is the time = 3 seconds

therefore, on substituting the values, we get

s = 0 ×3 + 1/2 ( 4.378)(3²)

s = 19.701

Thus, the vertical distance s is 19.701 m.

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Answer:

Ofc! Uhm, The cause of that increase would be (C) As it rises.

Explanation:

I hope this helped a little- I'm sure that I won't be 100% correct as it is 11 pm for me, haha. Nya~ good luck on the test!

Answer:

5m/s ez

Explanation:

plz make me brainliest

Explanation:

work done is equals to force into displacement in the direction of force

Ans: D

Answer: 480 N is required to maintain the arrangement .

Explanation:

Given, 320 N  force is required to hold 2 protons in a particular arrangement .

Then the force required to keep 1 proton in a particular arrangement = 320/2

= 160 N

Then if  a proton is replaced by an alpha particle , it is given that a alpha contains 2 protons , then we conclude that after replcament , the arrangement has 1 alpha and 1 proton = 3 protons

Then , the force exerted by 3 protons = 3×160 = 480 N

The force exerted by the arrangement , if one of the protons is replaced with alpha is 480 N

Answer:

approximately 0.00504 kWh

Explanation:

This electrical energy and is measured in kWh.

For 5 minutes and 20 seconds of use, it is 0.06 W x 0.084 h = 0.00504 kWh.

Note: 60W = 0.06kW; 5min 20sec = 0.083(8) ≈ 0.084 hour

Given the electric- and magnetic- field orientations, we need to determine the direction of propagation of the wave.

This can be determined using the right-hand rule.

To apply the right-hand rule to determine the direction of an electromagnetic field, follow these steps:

a) E in the +x direction, B in the +y direction:

For a wave with electric field in the +x direction and magnetic field in the +y direction, the direction of propagation of the wave is in the -z direction.

b) E in the -y direction, B in the +x direction:

For a wave with electric field in the -y direction and magnetic field in the +x direction, the direction of propagation of the wave is in the +z direction.

c) E in the +z direction, B in the -x direction:

For a wave with electric field in the +z direction and magnetic field in the -x direction, the direction of propagation of the wave is in the +y direction.

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A balanced force is required for a change in the direction of the motion.

According to Newton's second law of motion, the force applied to a body is directly proportional to the product of mass and acceleration of the body.

Balanced forces are those that are opposite in direction and equal in size. When forces are balanced there is no change in direction.

Thus, when there is change in direction, a balance force can be applied to cancel the change in direction of motion.

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A materiel that allows electricity to flow easily is called an conductor

Answer:

1 / f = 1 / o + 1 / i

1 / image distance + 1 / object distance = 1  focal length

If the object distance is large the image will be at about the focal length

The value of 1 / f is fixed for any one particular lense

As the object distance decreases the image must increase

The above equation can also be written as

o i / (i + o) = f    or i / (i / o + 1)  = f

If for instance o was very large the image would be at the focal length

The solid sphere will reach the bottom of the inclined plane first. The reason for this is that the sphere has the smallest surface area to volume ratio which means that there is less friction acting on it as it rolls down the incline.

Solid sphere moves more quickly than solid cylinder because it has a lower moment of inertia and more kinetic energy during translation. Comparable solid objects move more slowly than hollow ones.

If a cylinder and a sphere have the same mass and radius, the cylinder will have a greater moment of inertia due to its greater mass at its edges. Because the sphere's moment of inertia is smaller, it will move faster and arrive at the bottom first.

The process by which potential energy (PE) is transformed into kinetic energy is the cause of the solid cylinder's faster descent than the hollow cylinder. Some of the PE is transformed to rotating kinetic energy (RKE), not simply linear kinetic energy, because the cylinder is rolling (LKE).

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Answer:

b) downward. Correct choice

Explanation:

Projectile Motion

It's known as the type of motion that experiences an object that is projected near the Earth's surface and moves along a curved path exclusively under the action of gravity.

The gravity manifests through the acceleration of gravity g whose value is \(9.8 m/s^2\) and points downward. The object will eventually fall to the ground at a time and speed which depends on the initial speed and launch angle.

When the bullet is fired regardless of the initial speed and angle, the only acceleration of the system is g, thus:

b) downward. Correct choice

The acceleration acts on the bullet will be the acceleration due to gravity that is g and has a downward direction.

Since the bullet is fired at an angle of 45 so the bullet will travel in a projectile. So every point in time the acceleration due to gravity will act on the bullet.

After some point in time, the bullet will come to the surface of the earth as the energy in the bullet will reduce.

As we know that anything present on the earth is under the influence of the earth's gravity.

So the fired bullet will experience acceleration due to the gravity of the earth and the direction of the acceleration will always be downwards.

So the bullet will eventually fall to the ground at a time and speed which depends on the initial speed and launch angle.

Thus the acceleration acts on the bullet will be the acceleration due to gravity that is g and has a downward direction.

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Answer:

Explanation:

The answer is the layer right under the convection current, C and D. The heat is generated by radioactive decay of heavy elements in the Earth core.

What is the heat source for convection currents in layer E?

O A

O B✓

O C

O D

The angle of slope if the sled carrying a 30 kg child which is moving at a constant speed is 12.7°

Given that,

Force, F = 100 N

Mass, m = 10 + 30 = 40 kg

Angle at which the force is applied, θ = 30°

Resolving the force applied into its horizontal and vertical components,

cos θ = \(F_{x}\) / F

\(F_{x}\) = 100 * cos 30° = 100 * 0.866

\(F_{x}\) = 86.6 N

A force due to the weight of the cart is applied on the ground which is directly vertical downwards. But the slope is at an angle. So resolving this force into its horizontal and vertical components.

sin θ = \(w_{x}\) / w

w = m g

w = 40 * 9.8

w = 392 N

Given that the velocity when travelling up the slope is constant. So the acceleration is zero.

Σ \(F_{x}\) = m a = 0

\(F_{x}\) - \(w_{x}\) = 0

\(w_{x}\) = 86.6 N

θ = \(sin^{-1}\) ( 86.6 / 392 ) =  \(sin^{-1}\) ( 0.22 )

θ = 12.7°

Therefore, the angle of slope if the sled carrying a 30 kg child which is moving at a constant speed is 12.7°

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