Please help!!!!!!!!!!!!! :((

Answer:

The force of gravitational attraction is 8.454 x 10⁻⁸ N.

Explanation:

Given;

mass of the boy, m₁ = 78 kg

mass of the girl, m₂ = 65 kg

distance between the boy and the girl, r = 2 meters

The force of gravitational attraction is given as;

[tex]F = \frac{Gm_1m_2}{r^2}[/tex]

where;

G is gravitational constant = 6.67 x 10⁻¹¹ Nm²/kg²

r is the distance between two masses, m₁ and m₂

[tex]F = \frac{Gm_1m_2}{r^2} \\\\F = \frac{(6.67 \times 10^{-11})(78 \times 65)}{2^2}\\\\F = 8.454 \times 10^{-8} \ N[/tex]

Therefore, the force of gravitational attraction is 8.454 x 10⁻⁸ N.

Answer:

Gabriella is not moving

Explanation:

This type of problem can be solved by having the concept of relative velocities clear. Two bodies move at Equal velocity 4 [m/s] towards Pierre. But they ask us about how Michelle sees Gabriella moving.

Since Gabriela moves at the same speed as Michelle, when Gabriela turns her head to see Michelle, she doesn't seem to move faster or slower than she does.

A classic example is when we are passengers of a car and in a window next door we see, a car next to us, this car seems static before our eyes, but we are aware that it moves at a speed equal to that of the vehicle we occupy.

Answer:

[tex]17.89\ \text{m/s}[/tex]

Explanation:

Velocity is given by

[tex]v(t) = 16.02\hat{i}-7.96(1 + t)\hat{j} + 0.76t^3\hat{k}[/tex]

Initial velocity is asked so t = 0

[tex]v(0)=16.02\hat{i}-7.96(1+t)\hat{j}+0.76\times 0\hat{k}\\\Rightarrow v(0)=16.02\hat{i}-7.96\hat{j}[/tex]

Magnitude is given by

[tex]|v|=\sqrt{16.02^2+(-7.96)^2}\\\Rightarrow |v|=17.89\ \text{m/s}[/tex]

The initial velocity of the glider was [tex]17.89\ \text{m/s}[/tex].

Answer:  Given Force = 12 N

                  Mass = 3kg  and 6kg

F= mass. acceleration

A= F/M

A(3kg object) = 12/3 = 4m/s^2

A(6kg object) = 12/6 = 2m/s^2

Answer:

Explanation:

The acceleration of an object given it's mass and the force acting on it can be found by using the formula

[tex]a = \frac{f}{m} \\ [/tex]

f is the force

m is the mass in kg

From the question

5000 g = 5 kg

We have

[tex]a = \frac{55}{5} \\ [/tex]

We have the final answer as

Hope this helps you

Answer:

damage to a house and trees posibly

Answer:

Which structural damage might be expected if a Category 1 hurricane is predicted to hit an area?

Responses

A high percentage of framed homes could be destroyed, with total roof failure and wall collapse.

A high percentage of framed homes could be destroyed, with total roof failure and wall collapse.

ANSWER : ( Well-constructed frame homes could have damage to the roof, shingles, and vinyl siding.

Explanation: i did the quiz it was easy

Answer:

6.74 x 10¹⁴Hz

Explanation:

Given parameters:

Wavelength  = 4.45 x 10⁻⁷m

Speed of light  = 3 x 10⁸m/s

Unknown:

The frequency of the indigo light  = ?

Solution:

To solve this problem, we use the expression below;

       V  = f ∧

V is the sped of light

f is the frequency

 ∧ is the wavelength

 Now insert the parameters and solve;

        3 x 10⁸  =  f x 4.45 x 10⁻⁷

         f  = 6.74 x 10¹⁴Hz

Answer:

thank for making me give up on life

Explanation:

I thought the stuff I had was hard wth is even that

Answer:

Increases

Explanation:

For a given force, as the time increases, the impulse related to that force increases also.

Impulse and time are directly related to one another. Impulse is mathematically given as:

           I  = F t

I is the impulse

F is the force

t is the time taken

So, as both force and time increases, the value of the impulse must increase.

Answer:

40 N

Explanation:

We first need to calculate the acceleration of the tron ball.

Since acceleration, a = (v - u)/t where u = initial velocity of iron ball = 17m/s, v = final velocity of iron ball = 27m/s and t = time taken for the change in velocity = 5 s.

So, a = (v - u)/t

= (27 m/s - 17 m/s)/5 s

= 10 m/s ÷ 5 s

= 2 m/s²

We know force on iron ball, F = ma where m = mass of iron ball = 20 kg and a = acceleration = 2 m/s²

So, F = ma

= 20 kg × 2 m/s²

= 40 kgm/s²

= 40 N

So, the magnitude of the force on the iron ball is 40 N.

Answer:

fossil fuels are petroleum and natural gas. Well Fossils are mineralized remains of ancient plants and animals

The change in the vertical height of the person is obtained as 2.5 m.

Let us recall that gravity is a universal force of attraction that acts on any object that is found to be on the surface of the earth. It is instructive to know that gravity can only be an attractive force.

As the  person slides down the zip wire, the position of the person is changing. We have to know that the gravitational potential energy of the person is dependent on the position of the wire. As such, as the position changes, the gravitational potential energy of the person is also changing.

Using the formula;

W = mgh

W = gravitational potential energy

m = mass of the object

g = acceleration due to gravity

h = height of the body

If we substitute the values we have;

h = W/mg

h = 1.47 * 10^3/ 9.8 * 60

h = 2.5 m

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The cumulative distance traveled by the bird is 3.12 km.

The cumulative distance of the bird is calculated as follows;

Apply the principle of relative velocity.

Vbt - Vrt = L

(Vb - Vr)t = L

where;

Substitute the given parameters and solve for time of motion,

(41 - 8.2)t = 2.5

32.8t = 2.5

t = 2.5/32.8

t = 0.076 hr

Distance traveled by the bird = 0.076hr x 41 km/hr = 3.12 km

Thus, the cumulative distance traveled by the bird is 3.12 km.

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Given that,

Mass of magnesium, m = 2 kg

Heat added to it, Q = 8160 J

Increase in temperature, [tex]\Delta T=4\ K[/tex]

To find,

The specific heat of magnesium.

Solution,

Th formula that is used to find the heat required to raise the temperature in terms of specific heat is given by :

[tex]Q=mc\Delta T\\\\c=\dfrac{Q}{m\Delta T}\\\\c=\dfrac{8160\ J}{2\ kg\times 2\ K}\\\\c=2040\ J/kg-K[/tex]

So, the specific heat of magnesium is [tex]2040\ J/kg-K[/tex].

Answer:

B is the answer.

Explanation:

Answer:

3 m/s

Explanation:

rbsbdvebzvsvehdhdbd

Your speed is (36m)/(12sec).

That's 3 m/s. (Choice-A)

There's not enough information to determine your velocity.

Answer:

appreciate things u have

find happiness in things

Explanation:

I hope this helps u!

As, orbital period of jupiter is equivalent to 12 years.

So, monitoring sun for 50 years will give periodic peaks in intensity.

The power transferred per unit area is referred to in physics as the intensity or flux of radiant energy, and the area is measured on a plane perpendicular to the direction of the energy's transmission. Watts per square meter are the base units of the SI system. The term "intensity" is most often used to describe the average power transfer during a wave's duration, such as sound waves or electromagnetic waves like light or radio waves. There are many different energy exchange scenarios that can be described using the word intensity. One could figure out how much kinetic energy each drop of water from a sprinkler is carrying, for instance.

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Plasma best describes the elements inside stars.

Plasma:

Plasma is a charged gas and have strong electrostatic interactions.

Plasma is a state of matter that is a subset of gases, but the two states behave very differently.

plasmas are made up of atoms.

plasmas have no fixed shape or volume, and are less dense.

The electrostatic forces between the particles in the plasma become significant.

Plasma can conduct electricity because it contains charged particles.

The gas inside the bulb becomes a conductive plasma.

There are 3 states of plasma which depend on the supplied energy, usually electrical. The lowest energy state is dark mode, basically because it is invisible. The solar wind is dark mode, charged particles flowing from the Sun.

Plasma is a ionised gas , thus conduct electricity.

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Answer:

Answer is Electrons

Explanation:

If there is gain of electron then it will result a negative charge. And when there is loss of electrons it will result in the formation of positive charge iron.

The heating coil of a water heater has a resistance of 20 ω and operates at 210 v.  It takes 5 hrs to raise the it take to raise the temperature of 200 kg of water from 15oc to 80oc.

Obstruction is a proportion of the resistance to flow stream in an electrical circuit. Opposition is estimated in ohms, represented by the Greek letter omega (Ω). Ohms are named after Georg Simon Ohm (1784-1854), a German physicist who concentrated on the connection between voltage, current and opposition. In any case, obstruction and conductance are broad as opposed to mass properties, implying that they additionally rely upon the size and state of an item. Channels permit the free progression of power. Yet, in materials, for example, semiconductors and covers, the power encounters a specific power that goes against the free progression of electrons.

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Answer:

Engineers determine which features the material must have.

Explanation:

The statement provides an example of designing a solution in the technological design process is B. Engineers determine which features the material must-have.

Steps of the technological layout system encompass: pick out trouble, research the hassle, generate possible answers, pick out the fine solution, create a version, test the model, refine and retest the model as wished, and talk the final answer.

The design answer definition can be used to generate the quit product specifications with a view to be used to produce the product and to conduct product verification. This technique may be in addition delicate depending on whether or not there are extra subsystems of the quit product that need to be defined.

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The Wavelength and pressure amplitude of the final note is 0.39 m and 0.255 Pa respectively.

The minuscule pressure difference between compressions and rarefactions in a sound wave is what the human ear uses to function. Pressure amplitude refers to the size of these pressure variations. Generally speaking, a sound appears louder the larger the pressure amplitude it has. Even for very loud sounds, these pressure changes are negligible in comparison to ambient pressure. A jet plane at 30 yards, for example, has pressure changes of just a few hundred Pascals, or less than one-hundredth of atmospheric pressure, which is loud enough to cause damage to human ears (which is roughly 100,000 Pa). The pressure amplitudes of the quietest noises that people can hear are approximately one billionth of the atmospheric pressure.

x=Asin (w [ t-K])+ b

Given:

Initial frequency, [tex]f_{initial} = 146.8\;Hz[/tex]

Final frequency, [tex]f_{final} = 880\;Hz[/tex]

Sound level, [tex]\beta=79\;dB[/tex]

We know that,

Speed of the sound, [tex]v=343\;m/s[/tex]

Density of air, [tex]\rho=1.2\;kg/m^{3}[/tex]

Wavelength, [tex]\lambda=\frac{v}{f}[/tex]

Wavelength of final note is,

[tex]\lambda=\frac{v}{f_{final}}[/tex]

Substitute the known values in the above equation,

[tex]\lambda=\frac{343}{880}}[/tex]

[tex]\lambda=0.39\;m[/tex]

[tex]\beta=10\times log(\frac{I}{I_{0}} )[/tex]

We know that, [tex]I_{o}=1 \times 10^{-12}\;W/m^{2}[/tex]

[tex]79=10\times log(\frac{I}{1 \times 10^{-12}} )[/tex]

By solving the above equation, We get,

[tex]I=7.9\times 10^{-5} W/m^{2}[/tex]

Pressure amplitude of the final note is,

[tex]I = \frac{(\triangle p)^{2} }{2 \times \rho \times v}[/tex]

[tex](\triangle p)^{2} = I \times2 \times \rho \times v[/tex]

[tex]\triangle p = \sqrt{I \times2 \times \rho \times v}[/tex]

Substitute the known values in the above equation,

[tex]\triangle p = \sqrt{7.9 \times 10^{-5} \times2 \times 1.2 \times 343}[/tex]

By solving the above equation, We get,

[tex]\triangle p = 0.255\;Pa[/tex]

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Answer:

There are instances when the vectorial component or nature are important in solving problems.

Explanation:

The directional component of the velocity vector might become very important in some situations

Velocity problems involving topography; whether the velocity situation involves uphill or downhill for instance would have significant impact on the equation being solved, as deceleration or acceleration might occur, which would affect the velocity.

The resultant velocity of the boat and the river can be calculated by the application of vector diagram resulting to Pythagorean's theorem.

Velocity is a distance travelled in a specific direction per time taken. Velocity is a vector quantity and some questions involving velocity can be solved vectorially.

An example where the vectoral nature of velocity would be important when solving a problem will be a scenario where a boat is moving perpendicularly across a flowing river of high current.

Let assume that the river is flowing in west - east direction with a certain velocity. And the boat is moving across the river in north - south direction with a specific velocity.

The resultant velocity of the boat and the river can be calculated by the application of vector diagram resulting to Pythagorean's theorem.

Therefore, the vectoral nature of velocity will be important when solving a resultant velocity problem of a boat crossing a flowing river.

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A meteoroid is a rock in space when it enters a planet's atmosphere it is a meteor, any piece remaining after impact is a meteorite.

Meteoroids are small objects floating in space. They are made up of rocks, iron, and dust. In our solar system, meteoroids orbit the Sun and some planets.

When these meteoroids enter the atmosphere of earth, they become meteors. These meteors started to burn and shine due to friction.

Meteorites are the surviving un-burnt piece of meteors that hit the surface of the Earth.  

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Answer:

change 20 min into hr = 0.33 hr

Explanation:

convert= divide the time by 60 because 60 mins make 1 hr