I need help with my science.

Answer:

KE = 1/2 * m * [tex]v^{2}[/tex]

Explanation:

use the formula:

KE = 1/2 * m * [tex]v^{2}[/tex]

KE = kinetic energy in joules (J)

m = mass in kg

v = velocity in m/s

Answer:

KE=1/2mv^2

Explanation:

I hope this helps it's just the formula.

KE=1/2×mass×velocity^2

Answer:   B.

switch

Explanation: edmentum

Answer:

a total of four nodes and three antinodes

Explanation:

please tell me if im incorrect i will fix it asap.

Answer:

C. 25%

Explanation:

You posted in the wrong section, but 25% is closest to the UN's 22% estimate.

Answer:

this seems really complicated

Explanation:

Answer:

Copper

Explanation:

Answer:

The Universe is thought to consist of three types of substance: normal matter, 'dark matter' and 'dark energy'. Normal matter consists of the atoms that make up stars, planets, human beings and every other visible object in the Universe.

Explanation:

Answer:

Hey mate....

Explanation:

This is ur answer.....

According the NASA's StarChild Website, "The universe is a vast open space which contains all of the matter and energy in existence. The universe contains all of the galaxies, nebulae, stars, and planets. The exact size of the universe is unknown. Scientists believe the universe is still expanding outward.

The Universe is thought to consist of three types of substance: normal matter, 'dark matter' and 'dark energy'. Normal matter consists of the atoms that make up stars, planets, human beings and every other visible object in the Universe.

Hope it helps u,

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Answer:

w = 0.196 rad / s

Explanation:

To generate an acceleration similar to that of the earth, the station's centripetal acceleration must be equal to the acceleration due to gravity.

               a_c = v² / r = w² r

               a_c = g

we substitute

               g = w² r

               w² = g / r

               w = [tex]\sqrt { \frac{g}{r} }[/tex]

let's calculate

               w = √9.8/50

               w = 0.196 rad / s

therefore the station must rotate at that angular velocity so that the acceleration in the outer wall is equal to the ratio of gravity

Answer:

gamma ray, or gamma radiation (symbol γ or {\displaystyle \gamma } \gamma ), is a penetrating form of electromagnetic radiation arising from the radioactive decay of atomic nuclei. It consists of the shortest wavelength electromagnetic waves and so imparts the highest photon energy. Paul Villard, a French chemist and physicist, discovered gamma radiation in 1900 while studying radiation emitted by radium. In 1903, Ernest Rutherford named this radiation gamma rays based on their relatively strong penetration of matter; in 1900 he had already named two less penetrating types of decay radiation (discovered by Henri Becquerel) alpha rays and beta rays in ascending order of penetrating power.

Answer:

so basically

Explanation:

ty for the free points tho ez ez ez ez jajjajajajajajjajaj ez ez ez free cash dog water

Answer:

A, C, D

Explanation:

A, C and D are true.

B is false as energy can neither be created nor destroyed.

Answer: D

Explanation:

Answer:

At B

Explanation:

If it's placed on place B as soon as the cold water arrived it will have time to heat. Hope this helps and best of luck

Answer:

Explanation:

It goes thru the fluma

Answer:D increases

Explanation:

When sound travels from air into glass, speed of a sound wave increases. Hence option D is correct.

Wave is a disturbance in a medium that carries energy as well as momentum . wave is characterized by amplitude, wavelength and phase. Amplitude is the greatest distance that the particles are vibrating. especially a sound or radio wave, moves up and down.

Amplitude is a measure of loudness of a sound wave. More amplitude means more loud is the sound wave.

Wavelength is the distance between two points on the wave which are in same phase.

Phase is the position of a wave at a point at time t on a waveform.

speed of the sound is greatest in solid and it is medium in liquid and lowest in gaseous state.

In this problem sound wave is going from air to glass, it is actually going from gaseous to solid state, as speed of sound is greatest in the solid, speed of the sound increases to 5.640 m/s.

Hence option D is correct.

To know more about sound, click :

https://brainly.com/question/29707602

#SPJ7.

Answer:

the answer would be c sry if it is wrong

Answer:

table 1:

1. 100/15 = 6.7 m/s

2. 100/12 = 8.3 m/s

3. 100/9 = 11.1 m/s

table 2:

1. 100/8 = 12.5 m/s

2. 100/6 = 16.7 m/s

3. 100/4 = 25 m/s

Explanation:

Answer:

negative particles

Explanation:

An atom can be defined as the smallest unit comprising of matter that forms all chemical elements. Thus, atoms are basically the building blocks of matters and as such defines the structure of a chemical element.

Generally, these atoms are typically made up of three distinct particles and these are protons, neutrons and electrons.

In Chemistry, electrons can be defined as subatomic particles that are negatively charged and as such has a magnitude of -1.

Valence electrons can be defined as the number of electrons present in the outermost shell of an atom. Valence electrons are used to determine whether an atom or group of elements found in a periodic table can bond with others. Thus, this property is typically used to determine the chemical properties of elements.

Hence, an object is most likely to become electrically charged by gaining or losing negative particles.

Many reasons. Here are a couple:

1.) Water depth for the draft of incoming ships/vessels so they do not run aground.

2.) Distance between sea level and bottom of structures such as bridges for vessels passing underneath.

Answer:

D. 1R=1r1+1r2+1r3

Explanation:

If three components are arranged to form a parallel circuit, and the individual resistance of these components are r1, r2, and r3 respectively, the formula for finding the total resistance R is: 1R=1r1+1r2+1r3.

Answer:

The point at which rays or waves meet after reflection or refraction, or the point from which diverging rays or waves appear to proceed is called focal point

Answer:

read this it might help some

When a moving object collides with a stationary object of identical mass, the stationary object encounters the greater collision force. When a moving object collides with a stationary object of identical mass, the stationary object encounters the greater momentum change.

Explanation:

Answer:

60m/s

Explanation:

since the object is falling under the influence of gravity, the formula is

v = u +gt

before the fall, the object is at rest then

u = 0m/s

v = 0 + 10×6 because acceleration due to gravity is g which is given as 10m/s2

therefore, v = 60m/s

Answer:

kites where invented 2000 AD

so its A. 2000 AD

srry if it's wrong

Answer:

I guess no. A

Explanation:

approximately 2,800 years ago.

Answer:

B. Not

C. Positively

A. Attraction

Explanation:

Mass =150g = 0.15kg

Volume= 35cm^3 = 0.35m^3

Density= Mass×Volume

= 0.15kg × 0.35m^3

= 0.05 kg m^3

Answer:

The kinetic energy is 16 joules.                        

Explanation:

Kinetic energy (E) is given by:

[tex] E = \frac{1}{2}mv^{2} [/tex]

Where:

m: is the mass

v: is the speed

When the kinetic energy is 4 joules, the speed of the object is:

[tex] v_{1}^{2} = \frac{2E_{1}}{m} = \frac{8}{m} [/tex]                         

Now, if the speed is increased twice then we have:

[tex] E_{2} = \frac{1}{2}mv_{2}^{2} = \frac{1}{2}m(2v_{1})^{2} = \frac{1}{2}m[4(\frac{8}{m})] = 16 J [/tex]

Therefore, the kinetic energy is 4 times the initial value.  

I hope it helps you!