It took 50 joulss to push a char 5 meters across the floor. With what force was the chair pushed?​

Answer:

it'll be 0

Explanation:

Answer:

c = λ f

Explanation:

In the electromagnetic spectrum, the wavelength and frequency of a specific radiation are related to the speed of the wave, which in this case the speed of light

         c = λ f

where c is the speed of light, λ the wavelength and f the frequency of radiation

Answer:

 θ = 64.5º

Explanation:

To find the angles of a vector with respect to some axis of a coordinate system, the tangent function is used.

           tan θ = [tex]\frac{y}{x}[/tex]

where y is the opposite leg and x is the adjacent leg

in this case the angle is

        θ = tan⁻¹   [tex]\frac{A_y}{A_x}[/tex]

let's calculate

        θ = tan⁻¹ [tex]\frac{15.9}{ 7.6}[/tex]

        θ = tan⁻¹ 2.09

        θ = 64.5º

this angle is with respect to the positive pâté of the x axis

Answer:

see below

Explanation:

1) B, virtual because the when you stand in front of a mirror, the image formed is virtual and Image is laterally inverted

2) D because, when using converging lens , real image is formed, it is inverted and it can also be magnified or diminished when the object is placed at different focal length.

real image can be captured on the screen because light rays meet at the image position

when using converging lens, the image formed if it is virtual is upright.

hope this helps

Answer:

Uv rays

Explanation:

ultraviolet rays of the suun gives force

Answer:

what zones

Explanation:

Answer:

A and B

Explanation:

They contain Chlorophyll

They are relatively tall

Answer:

Answer:

Speed = 0.217 m/s

Explanation:

Given the following data;

Distance = 0.5m

Time = 2.3 seconds

To find the speed;

Speed = distance/time

Speed = 0.5/2.3

Speed = 0.217 m/s

Therefore, the speed of the bowling

ball is 0.217 meter per seconds.

the answer is "all organisms evolve at the same rate" :)

Answer:

answer is b

Explanation:

Answer:

turtle

Explanation:

Answer: 6.24 km

Explanation:

Given

The magnitude of the first vector(say) [tex]\left | a\right |=5\ km[/tex]

the magnitude of the second vector(say) [tex]\left | b\right |=7\ km[/tex]

the angle between them is [tex]120^{\circ}[/tex]

The resultant vector magnitude is given by

[tex]\left | \vec{R}\right |=\sqrt{a^2+b^2+2ab\cos \theta}[/tex]

[tex]\left | \vec{R}\right |=\sqrt{5^2+7^2+2\times 5\times 7\cdot \cos 120^{\circ}}\\\left | \vec{R}\right |=\sqrt{74-35}=\sqrt{39}\\\left | \vec{R}\right |=6.24\ km[/tex]

Answer: I believe it may be 18m/s I apologize if it isn't but have a great day :DDD

Answer:

C, it is not moving

it has no potential

Answer:

Explanation:

Frictional force = 7000 N

mass of car = 1300 kg . Initially car was moving uniformly so no force acting on car at that time . After frictional force acts , it creates deceleration or negative acceleration .

acceleration = force / mass

= - 7000 / 1300

= - 5.38 m / s²

.c ...energy

Explanation:

Amplitude does not affect wavelength. It also does not affect wave speed. Amplitude is the energy of the wave measured from the rest position to the top of the crest. A wave with more energy has a higher up crest/ higher amplitude.

As the amplitude of a mechanical wave increases, the quantity which increases is: C. energy.

A mechanical wave can be defined as a type of wave that requires a medium for its propagation and it creates a disturbance in the medium. Thus, a good example of mechanical wave is sound wave, which is typically transported in a perpendicular direction.

Amplitude refers to the maximum displacement of a wave when measured from its equilibrium position. Also, the amplitude of a mechanical wave has no effect on the following:

Read more on wave here: https://brainly.com/question/19250621

Answer:

materials that allow many electrons to flow freely are caused conductors such as copper, silver, aluminum, hydrochloric solution, sulfuric acid, and salt water. in contrast materials which allow few electrons to flow are called insulators such as plastic, rubber, glass, and dried paper.

Explanation:

Hope this helped Mark BRAINLEST!!

Answer:

Distance covered by Anthony is 3 km. Don't know about displacement though.

Answer:

V = 360 kV

Explanation:

Given that,

Charge, q = -2µC

We need to find the electric potential difference of 5cm from a point charge.

We know that the formula for the electric potential is given by :

[tex]V=\dfrac{kq}{r}\\\\V=\dfrac{9\times 10^9\times 2\times 10^{-6}}{0.05}\\\\V=360000\ V[/tex]

or

[tex]V=360\ kV[/tex]

So, the electric potential difference is 360 kV.

Answer:

If the atoms get two close then the nuclii will repell each other.

Explanation:

Since electrons are negative they are attracted to the nucleus because it is positive. If two atoms get close enough together then the electrons of each atom will be attracted to both nuclii.

Answer:

"a prank and an Internet meme involving an unexpected appearance of the music video for the 1987 Rick Astley song "Never Gonna Give You Up". The meme is a type of bait and switch using a disguised hyperlink that leads to the music video."

Explanation: G O O G L E

Answer:

here:Rick Astley - Never Gonna Give You Up (Official Music Video)

Explanation:

Uranium is an element. Uranium is a pure substance kind of matter. Thus, the correct option is A.

A pure substance is a single type of matter which cannot be separated or divided into other smaller kinds of matter through any kind of physical means or chemical decomposition. A pure substance always has a definite and a constant composition. A mixture is a physical combination which is made up of two or more kinds of pure substances in which each of the substance retains its own chemical identity in the compound.

Uranium is a chemical element with the symbol of U for its representation and the atomic number of 92. Uranium element is a silvery-grey metal in the actinide series of the periodic table of elements. A uranium atom has both 92 protons and 92 electrons, of which 6 of these electrons are valence electrons.

Therefore, the correct option is A.

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Answer:

A

Explanation:

Answer:

The force of the (attraction) between the poles B and C is (maximum) and the force of a (attraction) between the poles A and D is (minimum).

Explanation:

Answer:

The Moon spins in space in a movement called rotation. Oddly enough, it also takes the Moon about 27 days to spin around once (which is much slower than Earth's rotation, which only takes 24 hours). That means the Moon goes all the way around Earth in the same amount of time it takes to spin around just once!

Answer:

mass equals 375 kg

Explanation:

f=ma

f=7500

a=20

m=f/a

m=7500/20

m=375

1500 kg  is the mass of the car​.

Newton's second law of motion describes the relationship between an object's mass and the amount of force needed to accelerate it.

Newton's second law is often stated as,

F=ma, which means the force (F) acting on an object is equal to the mass (m) of an object times its acceleration (a).

According to the question,

Mass = 20m/s , Time = 4s , Force = 7500 N

a = Δv/Δt

a = 20m/s / 4s

a = 5 m/s²

If F = ma then,

7500 N =  m x 5 m/s²

m = [tex]\frac{7500 N }{ 5m/s^{2} }[/tex]

m = 1500 kg

Therefore,

1500 kg  is the mass of the car​.

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Answer:

hola

Explanation:

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Answer:

Explanation:

4

Answer:

D) 735 J(oules)

Explanation:

Work is defined as force * distance

Force is defined as mass * acceleration

Given a mass of 15 kg and a gravitational acceleration of 9.8 m/s² since the box is being lifted up, the force being applied to the box is 15 kg * 9.8 m/s² = 147 N

Since the distance is 5 meters, the work done is 147 N * 5 m = 735 N/m = 735 J, making D the correct answer.