What happens when magnesium becomes a 2+ ion?

Answer:

Explanation:

They traveled this distance in 2 parts, essentially. Part 1 had an average speed for a certain number of hours, part 2 had an average speed for a certain number of hours, and those 2 parts taken together took them a distance of 364 km. In equation form, that looks like this:

km/hr part 1 + km/hr part 2 = 364 km

Now we need to find each part on the left side of that equation. Part 1 first:

We traveled 65 km/hr for 2 hours, so that took us

\(65\frac{km}{hr}*2hr\) and canceling out the hour label, we have that in part 1 we got

65(2) = 130 km. Good. Now onto the second part, where our unknown is.

We traveled 78 km/hr the second part for x hours, so that took us

\(78\frac{km}{hr}*xhr\) and canceling out the hour label, we have that in part 2 we got

78x km. Now we can fill in the main equation (the one in bold print)

130 km + 78x km = 364 km and subtracting 130 km from both sides:

78x km = 234 km and dividing by 78 km:

x = 3 hours. Part 2 took 3 hours. Part 1 took 2 hours, so the whole trip took 5 hours.

The internal resistance is 3.92 Ω.

An ideal emf of 19 volts, voltage across the terminals is 13.2 volts, current is 1.47 amps.

Resistance and voltage:

In terms of power, voltage is defined as the work done per unit charge across two points in an electric circuit. It is measured in volts (V).

Resistance is defined as the opposition to the flow of electric current through a conductor. It is measured in ohms (Ω).

Internal resistance:

Let R be the internal resistance.

The voltage, V = 19 V - IR

The voltage across the terminals, V' = 13.2 V, and the current, I = 1.47 A.

The equation for calculating internal resistance is given asR = (V - V') / I

Substitute the given values.

R = (19 - 13.2) / 1.47R = 3.92 Ω

Therefore, the internal resistance is 3.92 Ω.

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Operators must have unobstructed access to a ladder for escape from a trench within a distance of 25 feet.
According to OSHA regulations, operators must have unobstructed access to a ladder for escape from a trench within 25 feet. So, the correct answer is c 25 feet.

According to OSHA Occupational Safety and Health Administration, employers must provide ladders, steps, ramps, or other safe means of egress for workers working in trench excavations 4 feet 1.22 meters or deeper1. The means of egress must be located so as not to require workers to travel more than 25 feet 7.62 meters laterally within the trench1. Therefore, the answer is c 25 feet. Operators must have unobstructed access to a ladder for escape from a trench within 25 feet. So, the correct answer is c 25 feet

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(a) The ball cleared the crossbar by 10.23 m.

(b) The ball approaches the crossbar while falling.

The maximum height reached by the ball is calculated by applying the following kinematic equation as shown below;

H = u² sin²θ / 2g

where;

H = (20.2² x (sin 53)²) / (2 x 9.8)

H = 13.28 m

ΔH = 13.28 m - 3.05 m = 10.23 m

The horizontal distance travelled by the ball is calculated as follows;

R = u² sin(2θ) / g

R = (20.2² sin(2 x 53) ) / (9.8)

R = 40 m

Thus, the ball cleared the crossbar and since the maximum height travelled by the ball is far greater than the height of the crossbar, the ball will approach the crossbar while falling.

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Answer:

There are two main ways to determine the age of a rock, these are Relative dating and Absolute dating. Relative dating is used to determine the relative order of past events by comparing the age of one object to another.

Explanation:

Explanation:

rock and fossils are made by layers of dirt, sand,organic matter that has beem compressed over thousands,if not millions of years.

some scientists use this layering to determine how old the earth is.

its kind of like looking at the rings of a tree to see how old it is.

the scientists look at each layer of the rock or fossil and use what they already know about when this type of soil or organic matter existed and try to piece together the past

The optical property of glass that primarily allows for the minimal loss of signal strength (amplitude) in fiber optics is its ability to maintain total internal reflection of the digital light signal.

This is due to the high refractive index of glass, which allows the light to bounce off the walls of the fiber instead of being absorbed or scattered, resulting in efficient transmission over long distances. Fiber optics is a technology that uses thin strands of glass or plastic, called optical fibers, to transmit information in the form of light signals over long distances. The light signals are sent through the fibers by bouncing off the walls of the fibers in a process called total internal reflection. Fiber optics is used extensively in telecommunications to transmit voice, data, and video signals over long distances, as it is faster, more reliable, and has higher bandwidth than traditional copper wires. It is also used in medical equipment, sensors, and lighting. The use of fiber optics has revolutionized the way information is transmitted and has played a key role in the development of modern communication systems.

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The arrangement of electromagnetic radiation, starting with the lowest energy and increasing to the greatest energy, is Option B) radio, ultraviolet, infrared, and gamma rays.

Radio waves have the lowest energy and longest wavelength among the given options. They are used for communication and broadcasting purposes.
Ultraviolet (UV) rays have higher energy and shorter wavelength than radio waves. They are responsible for effects like sunburn and are used in applications such as UV sterilization.
Infrared (IR) radiation has higher energy and shorter wavelength compared to ultraviolet rays. It is associated with heat and finds applications in thermal imaging and remote controls.
Gamma rays have the highest energy and shortest wavelength among the given options. They are a form of ionizing radiation used in medical imaging and radiation therapy.
Therefore, the correct arrangement of electromagnetic radiation in terms of increasing energy is radio, ultraviolet, infrared, and gamma rays, as mentioned in Option B.

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Answer:

12.6 s

Explanation:

y =  1/2 at^2

780.1 =  1/2 ( 9.81) t^2           answer can only have 3 s.d. due to the 9.81

t = 12.6 s

Answer:

240N

Explanation:

The formula for force is F=mass×acceleration.

Therefore, Force= 120×2= 240N

The electrostatic force between the two spheres when their distance is decrease to 0.5 m will be 4F

From Coulomb's law,

F = Kq₁q₂ / r²

Cross multiply

Fr² = Kq₁q₂

Kq₁q₂ = constant

F₁r₁² = F₂r₂²

With the above formula, we can obtain the final force as follow:

F₁r₁² = F₂r₂²

F × 1² = F₂ × 0.5²

F = F₂ × 0.25

Divide both side by 0.25

F₂ = F / 0.25

F₂ = 4F

Thus, we can conclude that the final force will increase by a factor of 4

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Answer:

8360N

Explanation:

F = ma

= 2200kg × 3.8 m/s²

= 8360 N

The wavelength that is associated with lamp 1 is A.

We know that the wavelength has to do with the horizontal distance that is covered by a wave. We can know the wavelength of the light if we can look at the intensity of the light that is emanating from each of the bulbs.

Clearly, the bulb that is labelled 1 is a dim bulb and the wave front that is generated by the bulb is also a small wave front thus the wavelength that is due to the brightness of this bulb would correspond to A.

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Answer:

Nuclear reactors are the heart of a nuclear power plant. They contain and control nuclear chain reactions that produce heat through a physical process called fission. That heat is used to make steam that spins a turbine to create electricity.

Answer:

A nuclear power plant's heart is made up of nuclear reactors. They contain and regulate nuclear chain reactions, which produce heat via a physical process known as fission. This heat is converted to steam, which powers a turbine to generate energy.

The velocity of an object can change even if the speed of the object remains constant.

Initial velocity (u) squared plus two times the acceleration (a) times the displacement equals final velocity (v) squared (s). Final velocity (v) is equal to the square root of initial velocity (u) squared plus two times the acceleration (a) times displacement when v is the variable being solved for (s).

In physics, an object's initial position is its starting point for motion, and its final position is where it comes to rest.

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Location of the ball is top of the circle and acceleration is 3g.

Since tension force is more, surely ball is having net force upward and hence, the location of the ball in this case is top of the circle.

Any object that moves in a circle has an acceleration vector towards the center of that circle. This is known as Centripetal acceleration.

total force/ net force when ball is top of the circle is sum of tension force and gravity force.

\(F_{net\) = T + mg

Because of this net force, there is centripetal acceleration towards the center.

so, T + mg = ma

2mg + mg = ma

3mg = ma

a = 3 × force of gravity

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Aswer:

False, the values ​​of the distance traveled and the displacement only coincide when the trayectorie is a straight line. Otherwise, the distance will always be greater than the offset.

Although these terms are used synonymously in other cases, they are totally different. Since the distance that a mobile travels is the equivalent of the length of its trajectory. Whereas, the displacement will be a vector magnitude.

xXCherryCakeXx.

TimeTime when energy stored in the capacitor will be half of its initial value=7.3s

To find the time at which the energy stored in the capacitor will be half of its initial value, we can use the formula for the time constant (τ) of an RC circuit and the fact that energy is halved when the voltage across the capacitor is reduced to 1/√2 of its initial value.

The time constant (τ) of the RC circuit is given by τ = R * C, where R is the resistance and C is the capacitance.

τ = (1.3 * 10^6 Ω) * (8.1 * 10^-6 F) = 10.53 seconds

Now, we can use the formula for discharging a capacitor: V(t) = V_initial * e^(-t/τ)

We need to find the time (t) when V(t) = V_initial / √2. So:

V_initial / √2 = V_initial * e^(-t/10.53)

Divide both sides by V_initial:

1 / √2 = e^(-t/10.53)

Take the natural logarithm of both sides:

-ln(√2) = -t / 10.53

Now, solve for t:

t = 10.53 * ln(√2) ≈ 7.3 seconds

So, the energy stored in the capacitor will be half of its initial value at approximately 7.3 seconds.

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Answer:

12

Explanation:

A x B = |A||B|sin ©

A x B = 3x4 sin 90

= 12

Answer:

Explanation:

The answer is magnetic force

Answer:

Magnetic forces which causes attraction between the two poles

Answer:

Harder

Explanation:

The more force that is exerted on an object the greater the resulting velocity. Using Newton’s 2nd law:

Force = Mass x Velocity

we can derive for Velocity to show that

Velocity = Force/Mass

So, the more force on an object (of any mass) the greater the velocity.

hope that helps :)

Answer:

There are two main types of OTC pain medicines: acetaminophen (Tylenol) and nonsteroidal anti-inflammatory drugs (NSAIDs). Aspirin, naproxen (Aleve), and ibuprofen (Advil, Motrin) are examples of OTC NSAIDs. If OTC medicines don't relieve your pain, your doctor may prescribe something stronger

169 Kcalories are provided by a portion of food that has 25 grams of carbs, 6 grams of protein, and 5 grams of fat.

Kcalories mean kilo-calories. Basically, kilo-calorie or kcal refers to 1,000 calories. To get the Kcalories of food, you have to add the kcal of carbohydrates, protein, and fat.

Get the product by multiplying the number of grams of carbohydrate, protein, and fat by 4,4, and 9, respectively. So if you want to get the energy or Kcal available from a meal, you must then combine the outcomes.

Simply put it, take note of the following conversions:

So here's how to compute the Kcalories of food that contains 25g carbs, 6g protein, and 5g fat.

1.    25g x 4kcal/g = 100kcal

2.    6g x 4kcal/g = 24kcal

3.    5g x 9kcal/g = 45kcal

4.    100kcal + 24kcal + 45kcal = 169kcal!


Therefore, the food contains 169 kilo-calories!

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Answer:

i think it is B

Explanation:

Answer:

Explanation:

R1= (1/6 + 1/6)rised to -1 = 3 ohm

R total = R1 + 6 = 3+ 6 =  9 ohm

The correct answer is e. None of the above alternatives gives a true statement. None of the statements in options a, b, c, and d are true when it comes to a modulus M over a ring R having a finite basis.

When a modulus M can be formed entirely from a finite set of elements, the modulus M is said to be finitely generated. M's finite basis does not, however, automatically imply that M is finitely generated. A basis is a set of linearly independent elements, and it might not be enough to produce all of the components of the modulus.

According to the assertion in option b, M must include nonzero items of nonzero order if it has a finite basis. This is untrue, though. The smallest positive number k, such that the element raised to the power of k equals the identity element, is referred to as the order of an element.

According to option c, every non-null element in a modulus with a finite basis has a null. Nevertheless, this claim is likewise untrue. It is possible for a modulus with a finite basis to have non-null elements without a null element.

According to option d, a ring R is a body, or a field, and only then can a modulus have a finite basis. However, this assertion is also untrue. Even though the ring R is not a field, a modulus can nonetheless have a finite basis. None of the given alternatives provides a true statement about a modulus M over a ring R having a finite basis.

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When an object is positioned close to the focal point of a converging lens, a virtual image is created. Its image is magnified & upright for such a posture.

Despite not being officially acknowledged or confirmed, a virtual tyrant in essence or effect. A: occurring or existing mostly online virtual purchasing. 2: being “ on ” or “ simulated on the a computer or a computer network printed or digital books a virtual keyboard.

When we frequently use the word "virtual," we generally mean online, that is, via a computer or other device. We use it to describe any communication that does not occur in a face-to-face physical setting.

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