Where do nebulae come from, in the opinion of science?
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1 point
It was made from a giant rabbit's skin.
It formed from the same cloud of dust that our entire galaxy is made from
It formed from hydrogen, the first element created in the universe.
It formed debris that was left over after a nova or supernova

Answer:

Explanation:

Comment

You have to read this carefully enough that you don't mix up energy and forces.

Gravity is a force. If you don't believe me try jumping off a building. Which way are you going to go and why? Down because gravity attracts your mass.

So Magnetism must be a force as well. It acts in one direction, but not a specific one the way gravity acts). It also either attracts or repulses (pushes an object away)

Answer A

Answer:

set-up X

Explanation:

Assuming that both nails are iron and the charge of the battery is the same, set-up X has a stronger magnetic field.

The more coils [turns] made around a nail, the stronger the electromagnet / magnetic field will be because each coil/loop essentially sets up its own magnetic field.

Hope this helps!!

Explanation:

Here,

Velocity of A=60km/hr

Velocity of B=80km/hr

Now,

Relative velocity of B with respect to A in the same direction=Velocity of B - Velocity of A

=80km/hr-60km/hr

=20km/hr

Answer:

20Km / hr

Explanation:

Here

velocity car A=60km/hr

velocity car A=60km/hrvelocity car B=80km/hr

Now

Relative velocity of B with respect to A in the same direction =velocity of B - velocity of A

= 80Km/hr - 60Km/hr

=20km/hr Ans

Explanation:

At a distance of 4.25 light years, Proxima is the closest-known star to our solar system. Science of the Alpha Centauri system. The two stars that make up Alpha Centauri, Rigil Kentaurus and Toliman, are quite similar to our sun

Answer:

1/3 power

Explanation:

I'm just a smart guy

The Berlin Airlift is best described as the aircraft used to delivered needed food and supplies to the city of Berlin through the air because all other routes were blocked by the Soviet Union.

The Berlin airlift was a 1940s military operation that supplied West Berlin with food and other vital goods by air after the Soviet Union blockaded the city.

Thus, the Berlin Airlift is best described as the aircraft used to delivered needed food and supplies to the city of Berlin through the air because all other routes were blocked by the Soviet Union.

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remote control

Explanation:

A remote control uses light waves just beyond the visible spectrum of light—infrared light waves—to change channels on your TV.

Answer:

The SI units used to describe energy is Joule (J)

The line leading a bracket around the balls, labeled A, represents the nucleus of the atom.

The nucleus constructs the major part of the atom where all the mass of atom is concentrated. The nucleus of the atom lies at the center, where protons and neutrons are placed.

2 red and 2 blue overlapping balls in the center are surrounded by a green, fuzzy, circular cloud with a white line running through it. 2 green balls sit on the white line, and a line leading a bracket around the balls is labeled a. a line leading to a bracket overlapping the white line is labeled b.

The red balls and the two overlapping balls in the center are representing the protons and neutrons.

Thus, the line leading a bracket around the balls, labeled A, represents the nucleus of the atom.

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Answer:

Explanation:

brash this so hard

Explanation:

Force = mass x acceleration

F= ma (formula)

15N = o.5kg x a

Divide both sides by o.5

a = 30 (greater acceleration)

15N = 4.5kg x a

Divide both sides by 4.5

a= 3.33 (great acceleration)

15N = 0.05kg x a

Divide both sides by 0.05

a = 300 (greatest acceleration)

You decide to hike up Mt. Everest so you can experience what it is like to be above roughly 75% of the air in the atmosphere,  the pressure at the summit is mathematically given as

P= 250mb

Generally, the equation for pressure at the summit is mathematically given as

P= (100-75) * pressure at the surface

Therefore

P= (25/100) x 1000

P= (0.25 x 1000)mb

P= 250mb

In conclusion, the pressure at the summit

P= 250mb

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If the elevator falls from a height of 240 meters and Superguy is 1 km away, he will have 6.5 seconds to save Lois, which means that his average speed must be 150 meters per second.

The total distance traveled by an object divided by the total time taken is the average speed.

The average speed of an object indicates the pace at which it will traverse a distance. The metric unit of speed is the meter per second.

Given data:

Distance of super guy from the tower = 1.00 km

height(h)= 240 m

From the Newtons' second equation of motion:

[tex]\rm S= ut+\frac{1}{2} at^2 \\\\\ 210 = 0+\frac{10}{2} t^2 \\\\ t= \sqrt 42\\\\t=6.5 \ sec[/tex]

Distance is the foundation as the product the velocity and time;

D=ut

u=d/t

u=1000/t

u=1000/6.5

u=150 m/sec

Hence, he will have 6.5 seconds to save Lois, which means that his average speed must be 150 meters per second.

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Only the horizontal component of the tension force is performing work on the crate. This component has magnitude (50 N) cos(30°) = 25√3 N, so the work done is

(25√3 N) (10 m) = 250√3 N•m ≈ 433 J

The energy stored in the capacitor at given capacitance and voltage is determined as 396.5 J.

The energy stored in the capacitor is calculated as follows;

E = ¹/₂CV²

where;

V is the voltage

E = ¹/₂ x 13 x 10⁻⁶ x (7.81 x 10³)²

E = ¹/₂ x 13 x 10⁻⁶ x (7.81 x 10³)²

E = 396.5 J

Thus, the energy stored in the capacitor at given capacitance and voltage is determined as 396.5 J.

The complete question is below

An electronic defibrillator used on heart attack victims works by delivering charge stored in a capacitor. If the device utilizes a 13.0 μF capacitor charged to 7.81 × 103 V, what is the energy stored in the capacitor?

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The correct option is B. Decrease the length of the wire between the switch and the battery.

The resistivity of a wire is the measure of the opposition to the flow of current offered by the wire.

ρ = RA/L

RA = ρL

R = ρL/A

where;

Decrease in length of the wire will cause a decrease in the resistance of the wire, and it will increase the current flowing in the wire, causing the bulb to glow brighter.

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Answer:

Radiology plays a huge role in disease management by giving physicians more options, tools, and techniques for detection and treatment. Diagnostic imaging allows for detailed information about structural or disease-related changes. With the ability to diagnose during the early stages, patients may be saved.

Explanation:

The time  taken for anna to move the box the distance of 9.72 meters is 25.9 seconds. The correct option is c.

The force is the action of push or pull to move or stop an object.

Anna pushes a box with a force of 8.00 newtons. she generates a power of 3.00 watts.

Force is related to power by the relation

Force = Power / Velocity

Put the values, we get

8 = 3/V

V = 0.375 m/s

Velocity is defined as the ratio of distance and the time taken.

The box is moved by the distance of 9.72 meters. So, time taken is

V = d/t

0.375 = 9.72/t

t =25.9 seconds.

Thus,  time  taken for anna to move the box the distance of 9.72 meters is 25.9 seconds.

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Explanation:

friend I have solved it as we know that force = mass *acceleration and by the equations of motion

To solve this, we must be knowing each and every concept related to force and its calculation. Therefore, the amount of force applied in the car during the time is 6000N.

Nature is governed by four fundamental or universal forces. All stuff in the universe would disintegrate in the absence of these forces. Any pull or push that causes an item to change its physical condition is referred to as force (in terms of motion or deformity).

Mathematically,

V²-u²=2aS

V=72 km/h=72000/3600=20m/s

u=0m/s

s= 50 m

substituting all the given values in the above equation, we get

20²-0²=2×a×50

a=4m/s²

Force = mass ×acceleration

substituting all the given values in the above equation, we get

1500 kg=mass

Force = 1500 ×4

         =6000N

Therefore, the amount of force applied in the car during the time is 6000N.

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Answer:

See below ~

Explanation:

The Mechanical Advantage (MA) is defined as the ratio between the force produced by the machine to the force applied to it.

=============================================================

So,

⇒ [tex]\frac{F(out)}{F(in)} = 2[/tex]

⇒ This means that the force produced is twice the applied force

Answer:

The wavelength is about 666.2 nm.

The color is red.

Explanation:

Recall the relationship between frequency and wavelength:

[tex]\displaystyle c = \lambda \nu[/tex]

Solve for wavelength λ:

[tex]\displaystyle \lambda = \frac{c}{\nu}[/tex]

Substitute and evaluate. Note that 1 Hz = 1 s⁻¹:

[tex]\displaystyle \begin{aligned} \lambda & = \frac{(2.998\times 10^{8} \text{ m/s})}{(4.5\times 10^{14} \text{ /s})} \cdot \frac{1\times 10^9\text{ nm}}{1\text{ m}} \\ \\ & = 666.2 \text{ nm}\end{aligned}[/tex]

Therefore, the wavelength of the light is about 666.2 nm.

This corresponds with the red region of the visible spectrum.

If the charged particle moves in the magnetic field or electric field, then it experiences  magnetic force or electric force because of its magnetic or electric properties.

The magnetic field is the region of space where a charged object experiences magnetic force when it is moving.

When a charged particle such as an electron or proton moves inside a conductor, magnetic lines of force rotate around the particle. This relative motion causes the magnetic field to generate.

Thus, If the charged particle moves in the magnetic field or electric field, then it experiences  magnetic force or electric force because of its magnetic or electric properties.

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Answer:

If a magnetic or electric field is present, materials that generate these fields will interact by attracting or repelling each other because of their magnetic or electric properties.

Explanation:

Answer: A

Explanation:

Answer:

a coil rotating in a magnetic field to change its flux

Answer:

Soil erosion by water occurs when bare-sloped soil surface is exposed to rainfall, and the rainfall intensity exceeds the rate of soil intake, or infiltration rate, leading to soil-surface runoff.

Explanation:

Surface cover and runoff. Surface cover is a major factor to control erosion because it reduces the impact of raindrops falling on bare soils and wind removing soil particles. It also reduces the speed of water flowing over the land. Erosion risk is significantly reduced when there is more than 30% soil cover.

Answer:

by natural process of flood

by blasting of dam

increasing the water level

The biomass energy can use improve water quality in soil erosion and sedimentation are decreased during biomass crop growth. The correct option is C.

Biomass energy is obtained by the processing of the dead plants and animal or vegetable, cow dung or wood.

The biomass energy obtained by these bio things, it is enriched with the nutrients required by the new crop plants to grow effectively.

The biomass energy provides good water quality by soil erosion and sedimentation.

Thus, The correct option is C.

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Explanation:

20÷250 =12.5 and do it by using fourmulaes

The reactance of the circuit will be 5.233×10⁻⁴ ohm. Inductive reactance is the product of 2 times π frequency and the coil inductance.

When alternating electricity passes through pure reactance, it causes a voltage drop that is 90 degrees out of phase with the current.

The letter “X” is used to represent reactance in mathematics, and it is measured in ohms.

The inductive reactance of a coil is calculated using the following formula:

Inductive reactance, or XL, is the product of 2 times p (pi), and the frequency of the ac current in hertz, and the coil inductance in henries.

XL= 2πfL

Where,

f {frequency)

L (Inductance)

The reactance of the circuit is found as;

[tex]\rm R_{new}=0.38[{(\frac{1}{60} )^2][/tex]

[tex]\rm R_{new}=1.055 \times 10^{-4} \ ohm[/tex]

The inductance of the circuit is;

[tex]\rm X_{new}=1.9(\frac{1}{60} )^2\\\\X_{new}= 5.233 \times 10^{-4}\ ohm[/tex]

Hence, the reactance of the circuit will be 5.233×10⁻⁴ ohm.

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neutralization reactions occur when you combine two extremely reactive substances together for the purpose of rendering them inactive, or neutral.