HELP FAST!!!!!


I DONT UNDERSTAND ​

Answer:

Galileo Galilei

Explanation:

The famous astronomer Galileo Galilei was the one who discovered Jupiter’s large moons.

I hope it helps! Have a great day!

Muffin ^^

Answer:

Galileo Galilei

Explanation:

The great and famous astronomer Galileo Galilei was the one that discovered Jupiter’s largest moons.

I hope it helps! Have a great day!

Anygays-

Answer:

-13.5 m/s^2

-1.35m/s

Explanation

First, find the momentum of the paintball by using the formula [tex]p=mv[/tex].

[tex]p=0.15*45[/tex]

[tex]p = 6.75[/tex]

The next step would be to find the change of momentum of the gun. Since the gun was at rest it had a momentum of 0. Momentum acts in different directions equally, therefore we can set up the equation for the acceleration:

FΔt=Δp

Where F is force, Δt is the change of time and Δp is the change of momentum.

Since we solve for acceleration, we can convert F to ma to get:

maΔt=Δp

Substitute values:

5a*(0.1-0)=-6.75

5a=-67.5

a=-13.5

Our a is -13.5m/s^2, it's negative since the direction it's acting on is opposite of the paintball.

Now we can find velocity (and double-check our work!).

The first way to solve for velocity is:

[tex]V=Vi+at[/tex]

Where V is final velocity, Vi is initial, a is acceleration and t is time.

substitute values:

[tex]V=0-13.5*0.1\\V=-1.35m/s[/tex]

If we are correct, using the formula p=mv, we should get the same result (remember, our momentum is negative).

[tex]p=mv\\-6.75=5v\\-1.35m/s=v[/tex]

Hope this helps!

Answer:

I think it is  atrioventricular valves

Explanation:

hope this helps

Para calcular el contenido en gramos de una bebida alcohólica basta con multiplicar los grados de la misma por la densidad del alcohol (0,8). El contenido de alcohol de una bebida depende de la concentración de alcohol y del volumen contenido.

The mass in grams and in kilograms of ethyl alcohol respectively is: a) 1185.0 g and b) 1185 kg

Density is an intensive property of matter. It represents the relationship between the mass and the volume of a body or substance. Its units are in the International System kg/m3, kg/L, g/ml, g/cm3, among others.

Density = m/V

The mass is obtained by clearing this equation

m=Density *Volume

m= ?

V= 1500 cm3 * 1 * 10⁻⁶ m³ / 1 cm³ = 0.0015 m³ = 1.5 * 10⁻³ m₃

Density= 790.0 kg/m3

Answer:

 B C     I suppose , though A is correct too

Explanation:

The arrows on the magnetic field lines point from the magnet's north pole to its south pole. The field lines are closest together in and near the magnet. Thus, the correct options are B and C.

Magnetic force is the force of the electrically charged particles which are in motion, such as attraction, or repulsion results from their activity. It is the fundamental force behind the phenomena like how electric motors operate and magnets are drawn to metals.

Usually, when we draw magnetic field lines, we start to draw outwardly from the North pole to the South Pole. This same direction is prevalent on the Earth due to the fact that the Earth functions as a giant magnet. Thus, the model describes that the magnetic field lines will spread out of the north end of the magnet to the south end. The magnetic field lines are closest in and near the magnet.

Therefore, the correct options are B and C.

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Answer:

188 v

Explanation:

The average of a sine wave is .637 times the peak value

.637 x = 120

x = 120 / .637 = 188 v

The voltage in an American household is 120 v. however because we use a/c power, the voltage is oscillating between two maximums, then the maximum or peak voltage required to produce an average voltage of 120 Volts would be 76.44 Volts.

The rate of doing work is known as power. The Si unit of power is the watt.

Power = work / time

The mathematical expression for the power is as follows

P = VI

As given in the problem, the voltage in American household is 120 v. however, because we use a/c power, the voltage is oscillating between two maximums.

The average voltage (VAV) of a sinusoidal waveform is determined by multiplying the peak voltage value by the constant 0.637, which is two divided by pi (π).

The maximum voltage = 120 × 0.637

                                      =  76.44 Volts

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The cell is an animal cell and the rod-shaped structures in the cell are mitochondria.

Cell organelles are membrane-bound structures found within the cell of eukaryotes which carry out specific functions in the cell.

Some cell organelles include:

The rod-shaped structures in the cell are mitochondria.

Asters are star-shaped structures found within the cell which are found close to the nucleus d

at the early mitosis in an animal cell.

Asters do not form during mitosis in plants.

Therefore, the cell is an animal cell and the rod-shaped structures in the cell are mitochondria.

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a. The integral expression for the change in potential energy of the spring is ΔU = ∫kxdx

b. The change in potential energy of the spring is ΔU = k(x₂² - x₁²)/2

Since we are given the differential elastic potential energy, du, to find the integral expression, we integrate du.

The integral expression for the change in potential energy of the spring is ΔU = ∫kxdx

Since the infinitesimal elastic potential energy of the spring du = kxdx, integrating both sides of the expression, we have

ΔU = ∫du

ΔU = ∫kxdx

So, the integral expression for the change in potential energy of the spring is ΔU = ∫kxdx

The change in potential energy of the spring is ΔU = k(x₂² - x₁²)/2

Performing the integration for the change in potential energy of the spring

ΔU, we have that integrating for change in length from x₁ to x₂

ΔU = ∫kxdx

ΔU = k[x²/2]₁²

ΔU = kx₂²/2 - kx₁²/2

ΔU = k(x₂² - x₁²)/2

So, the change in potential energy of the spring is ΔU = k(x₂² - x₁²)/2

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the output voltage of the transformer that has 1,000 turns of wire in the primary coil and 50 turns in the secondary coil is 120 V

A transformer is an electrical device that transfer electric energy from one circuit to another.

To calculate the output voltage of the transformer, we use the formula below.

Formula:

Where:

Make V' the subject of the equation

From the question,

Given:

Substitute these values into equation 2

Hence, the output voltage of the transformer that has 1,000 turns of wire in the primary coil and 50 turns in the secondary coil is 120 V.

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Answer:

D)it decreases to 1/9 its original magnitude

Answer:

945 joules

Explanation:

the formula for kenetic energy is:

0.5 × m × v^2

where m is in (kg) ane (v) is in meter per second.

so we can just use the formula;

0.5 × 2.1 × 30^2

so the answer is 945 joules

Answer:

See below ↓↓↓

Explanation:

1. C. Gas

2. B. Speed

3. A. Pascal

Answer:

5. 25 [kg].

Explanation:

1) the final ratio is:

m_20kg *g=m*g/cos37°; ⇒ m= m_20kg / cos37°;

2) answer is:

m=20/0.8=25 [kg].

Answer:

153000J

Explanation:

[tex]work \: done = \: force \times distance \\ force = mass \times acceleration \: due \: to \: gravity \\ = 51 \times 10 \\ = 510newton \\ work \: done = 510 \times 300 \\ = 153000joules[/tex]

The material the parachute is made out of" will not be a suitable control variable as it is needed in the research.

It should be noted that a control variable simply means any variable that is held constant in a research.

In this case, the material the parachute is made out of" will not be a suitable control variable as it is needed in the research.

Therefore, it's false.

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Answer:

150J

Explanation:

yee thats it hope it helps

Answer:

4 ohms

Explanation:

V = I R

12 = 3 R

R = 4 ohms

Answer:

c. 3,000

Explanation:

I am guessing 3000 years

Answer:

rusting metal I think hehe

Answer:

8927.1 Pa

Explanation:

pressure = height x density of liquid x g

               = (91/100) x 1000 x 9.81

               = 8927.1 Pa

increase or decrease

Thus the mass may increase and  decrease due to conduction || varies

If we say that a galaxy has a lookback time of 1 billion years, we mean that its light traveled through space for 1 billion years to reach us.

have a great day!

ii) The pressure difference in the two containers starts the flow of the water from container A to B until the pressure becomes equal in both the containers. Pressure causes force on water, because pressure = force/area

Answer:The difference between air temperature and dew point is less than 4.5 degrees Fahrenheit when fog can form.

Explanation:This can occur because of added moisture or falling air temperatures. The difference between air temperature and dew point is less than 4.5 degrees Fahrenheit when fog forms.

Answer:

A or B you choose

Explanation:

This is called current electricity or an electric current. A lightning bolt is one example of an electric current, although it does not last very long. Electric currents are also involved in powering all the electrical appliances that you use, from washing machines to flashlights and from telephones to MP3 players.

what is an electrical current, amp, ampere Current is the flow of electrons. When a circuit is closed then a current of electrons can flow and when a circuit is open then no current can flow. We can measure the flow of electrons just like you can measure the flow of water through a pipe.

High energetic winds turning generator , causing electrons to flow into power lines is an example of current electricity. Remaining all are examples of static electricity .

The movement of electrons from one area of the circuit to another is referred to as current electricity. Free electrons flow between two points when two bodies with different potentials are connected by a wire, until both objects reach the same potential, at which point the current stops.

Current flows until a potential difference exists throughout the conductor. The following techniques can be used to produce current electricity:

1. Through the passage of a metal wire through a magnetic field (Both alternating current and direct current can be generated by the following method)

2.Utilizing a battery and chemical reactions (Direct current can be generated through this method)

Here, the wind's kinetic energy provide the mechanical energy for the generator to to produce power lines. Hence option A is correct. All others are static electricity for short time only.

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