How do plates move in relation to each other at convergent boundaries?

Answer:

3.

Explanation:

If the astronaut in the video wanted to move upward, he should throw the object downward because according to Newton’s third law, the object will then exert a force on him in the opposite direction (i.e., upward). hence, option (3) is correct.

Newton's Third Law states that if object A exerts a force on object B, then object B must apply a force to object A that is equal in magnitude and directed in the opposite direction.

This law represents a specific symmetry in nature: forces always exist in pairs, and no body can exert a force without also being subjected to one.

Hence, if the astronaut in the video wanted to move upward, he should throw the object downward and  the object will then exert a force on him in the opposite direction (i.e., upward).

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Answer:

the initial force exerted on the rocket is 900 N

Explanation:

The computation of the initial force exterted on the rocket is shown below:

Force exerter = Rate of change of momentum

= 300 m/s × 3kg/s

= 900 N

hence, the initial force exerted on the rocket is 900 N

we simply multiplied the rate with its speed so that the force could come

a ) When they reach the ground, rock B has greater velocity.

b ) Both rocks have the same acceleration

c ) Rock A and Rock B arrives at the same time

According to law of conservation of energy,

1 / 2 m u² + m g hi = 1 / 2 m v² + m g hf

u = 0

hf = 0

m g hi = 1 / 2 m v²

v = √ ( 2 g / m ) √ hi

v ∝ √ hi

a ) hi of rock A will be higher because it reaches a certain height above the ground which will be considered as initial height for rock A. So, the final velocity of rock A is higher.

b ) Both the rock are affected by only the force of gravity. So they will have the same acceleration of 9.8 m / s²

c ) If air resistance is ignored,

s = u t + 1 / 2 at²

For an object that is dropped,

u = 0

a = g

s = at² / 2

t = √ ( 2 s / g )

It can clearly be seen that no matter what height an object might be dropped from, if air resistance is ignore they will fall at the same time.

Therefore,

a ) When they reach the ground, rock B has greater velocity.

b ) Both rocks have the same acceleration

c ) Rock A and Rock B arrives at the same time

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The magnitude of acceleration of object A be 10226.93 m/s^2.

Newton's universal law of gravitation states that the force of attraction between any two bodies is inversely proportional to the square of the distance between them and directly proportional to the product of their masses.

Given parameters:

Let, Mass of object A be = m kg.

Mass of object B be= M =  4.21 x 10^21 kg.

Distance between the two objects = r = 5.24 x 10^3 m.

G = 6.67 x 10^-11 N (m/kg) ^2.

So, attraction force acting on object A be: F = GMm/r²

Hence, acceleration of object A be = F/m = GM/r².

After putting the given numerical values , we get:

acceleration of object A be = 10226.93 m/s^2

Hence, acceleration of object A be  10226.93 m/s^2.

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In the Charges and Fields PhET simulation (HTML 5 version), you can change the following aspects of the simulation: add positive or negative charges, adjust the strength of charges, measure electric field and potential and display field lines and equipotential lines.

1. Add positive or negative charges: You can place positive or negative point charges on the grid to create different electric fields.
2. Adjust the strength of charges: You can modify the strength of the point charges, influencing the electric field's intensity.
3. Measure electric field and potential: You can use the electric field and electric potential sensors to measure the field's strength and potential at various points in the simulation.
4. Display field lines and equipotential lines: You can toggle the display of electric field lines and equipotential lines to visualize the electric field and potential created by the charges.
Remember to experiment with different combinations of charges and their strengths to explore various electric field scenarios.

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Answer:

300,000,000

Explanation:

Use the speed formula

Speed= wavelength x frequency

Answer:

A fertilizer or fertiliser is any material of natural or synthetic origin that is applied to soil or to plant tissues to supply one or more plant nutrients essential to the growth of plants. Many sources of fertilizer exist, both natural and industrially produced.

Explanation:

Answer:

8000 J

Explanation:

There is a Quizlet made by a teacher with this answer.

Answer:

a

Explanation:

because there both in the solar system

There are billions of galaxies in the universe and each contains trillions of stars which are different in size, distance from the earth, brightness etc.When we scientifically investigate about this we can obtain the stars of similarity to sun in brightness and size.

Galaxies are a group of stars, dust and dark matter joined together by the force of gravitation. Three trillions of stars in each galaxies. Some stars forms a group of certain  size and shape and number also they are called constellations.

Sun is the closest star to earth. Thus sunlight is the major source of energy in earth. Sunlight reaches the earth surface within a time of 8 minute and 6 seconds.

The star which nearest to sun is named proximacentory which far from the earth and we can see it as spot of light in the sky. There are many more stars which are giants are more brighter than sun.

The brightness and luminosity is determined based on the distance from the earth. Which can be calculated in terms of light years. Each star has an age and length of life. After that the star may die still their light energy can be seen in sky because their light takes more years to reach here.

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The battery rating that is tested at 0 degrees Fahrenheit (-18 degrees Celsius) is the (2) cold cranking ampere (CCA) rating.

CCA measures the number of amps a battery can deliver for 30 seconds at 0°F without dropping below 7.2 volts. This rating is important in colder climates because lower temperatures can cause batteries to lose power, making it more difficult for the battery to start the vehicle.

The higher the CCA rating, the more powerful the battery is in cold weather. The cranking ampere (CA) rating measures the same thing, but at 32°F instead of 0°F. Marine cranking ampere (MCA) is similar to CCA, but is tested at 32°F and for a longer period of time, as it is used in marine applications. Reverse capacity is not a battery rating.

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Answer:

c.) 60 000j

Explanation:

c.) 1kj=1000j

60kjx1000

=60 000joules

Answer:

6 seconds

Explanation:

\(d=v_ot+\dfrac{1}{2}at^2\)

Since the object is being dropped out of the window, it has no initial velocity.

\(176.4=\dfrac{1}{2}(9.8)t^2 \\\\t^2=36 \\\\t=6\text{ seconds}\)

Hope this helps!

Answer:

6 seconds

Explanation:

The formula for free fall is:

h = 1/2gt^2

We know that the height is 176.4 meters. We also know that on Earth, gravity is 9.8 m/s^2.

h=176.4

g=9.8

Substitute these values into the formula.

176.4=1/2(9.8)*t^2

Multiply 9.8 and 1/2

176.4=4.9*t^2

t^2 and 4.9 are being multiplied. The opposite of multiplication is division. Divide both sides by 4.9

176.4/4.9=4.9*t^2/4.9

176.4/4.9=t^2

36=t^2

t is being squared. The opposite of squared is the square root. Take the square root of both sides.

√36=√t^2

√36=t

6=t

t=6 seconds

It will take 6 seconds for the object to fall 176.4 meters.

Answer:

Newton's second law

Explanation:

The greater the mass of an object, the less it will accelerate when a given force is applied.

If the distance from the source is doubled or increased by a factor of 2, then the intensity is quartered decreased by a factor of 4.

A sound wave's intensity is inversely related to density and speed and proportionate to the change in pressure squared.

The region that the sound waves cover grows as one gets farther from the source of the sound. The intensity and loudness of the sound are reduced because the same quantity of energy is dispersed over a larger region.

Inversely proportional to the square of the source's distance, the intensity varies.

Therefore, if the distance from the source is doubled or multiplied by a factor of 2, the intensity is reduced by a factor of 4 and then by a fourth.

When a time difference is twice, intensity is reduced by a factor of 4 each time.

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Answer:

440J

Explanation:

First, let us find the weight of the barbell.

The formula to find the weight is :

W = m × g

Here,

m ⇒ mass ⇒ 20 kg

g ⇒ acceleration of gravity

Let us find it now.

W = m × g

W = 20 kg × 10 ms⁻²

W = 200N

And now let us find the work done by this weight lifter.

Work = Force × Displacement

Let us find it now.

Work = Force × Displacement

         = 200N × 2.2m

         = 440J

Answer:

His initial velocity (speed) must be 64.16 m/s.

Explanation:

Horizontal Motion

When an object is horizontally launched at a speed v from a height h, the maximum horizontal distance (also called Range) traveled by the object can be calculated as follows:

\(\displaystyle d=v\cdot\sqrt{\frac {2h}{g}}\)

Our daredevil is attempting to clear a river d=420 m wide with his motorcycle from a cliff h=210 m high. We need to find the speed needed to safely reach the opposite edge of the river.

From the above equation, we solve for v:

Speed:

\(\displaystyle v=d\cdot\sqrt{\frac {g}{2h}}\)

\(\displaystyle v=420\cdot\sqrt{\frac {9.8}{2\cdot 210}}\)

\(\displaystyle v=420\cdot\sqrt{\frac {9.8}{420}}\)

v = 64.16 m/s

His initial velocity (speed) must be 64.16 m/s.

Answer:

The shape of a screw is a cylindric shape that grows in diameter at the top. Along the cylindar portion, it has horizantal ridges that circulate around the screw.

Hope this helps, brainliest pls :D

Answer:

3500joules of work

Explanation:

Work done = Force×,distance

Given

Focrce= mass ,× acceleration = 140×10 = 1400N

Distance moved = 2.5m

Workdone = 1400×2.5

Work done = 140×25

Workdone = 3500Joules

The force applied to pull the box up the ramp acts parallel to the incline is 8N

The force applied to pull the box is expressed as:

\(F_N = F_m + F_f\)

Fm is the moving force

Ff is the force of friction

Get the moving force and frictional fice

\(F_m = 10sin30^0 = 5N\\F_f = 3N\)

The force applied to pull the box up the ramp acts parallel to the incline = 5N + 3N  = 8N

Hence the force applied to pull the box up the ramp acts parallel to the incline is 8N

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Answer:

importance of measurement is it gives proper required amount of anything if it will not exist then alot of work be disrupted .In many work measurement is very necessary like in scientific works

We cannot see room temperature objects in the dark because they emit thermal radiation primarily in the infrared range, which is outside the visible spectrum.

The reason we cannot see room temperature objects in the dark is because the amount of electromagnetic radiation they emit at room temperature is in the infrared range, which is beyond the visible spectrum of light.

Objects at room temperature emit thermal radiation known as blackbody radiation. The intensity and wavelength distribution of this radiation depend on the temperature of the object. At room temperature, the peak intensity of the radiation occurs in the infrared range, which is not visible to the human eye.

Our eyes are sensitive to a specific range of wavelengths known as the visible spectrum, which includes colors from violet to red. We perceive objects when they reflect or emit visible light that falls within this spectrum.

Since the thermal radiation emitted by room temperature objects is predominantly in the infrared range, it is outside the range of wavelengths that our eyes can detect, and therefore we cannot see these objects in the dark.

However, specialized devices such as infrared cameras can detect and convert the emitted infrared radiation into visible images, allowing us to "see" the heat signatures of room temperature objects even in the absence of visible light.

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The induced emf opposing the current is approximately -3.84 V for the 8.00 A current through a 4.00 mH inductor is switched off in 8.33 ms.

To find the induced emf in the inductor, we can use the formula:
emf = -L * (ΔI/Δt)
where:
emf = induced electromotive force (in volts)
L = inductance of the inductor (in Henrys)
ΔI = change in current (in amperes)
Δt = time taken for the current to change (in seconds)
Given the information in your question:
L = 4.00 mH = 4.00 * \(10^{-3}\) H (converting millihenry to henry)
ΔI = 8.00 A (since the current is switched off, the change is equal to the initial current)
Δt = 8.33 ms = 8.33 * \(10^{-3}\) s (converting milliseconds to seconds)
Now, we can plug these values into the formula:
emf = - (4.00 * \(10^{-3}\) H) * (8.00 A) / (8.33 * \(10^{-3}\) s)
emf = - (32 * 10^-3) / (8.33 * \(10^{-3}\))
emf ≈ -3.84 V
The induced emf opposing the current is approximately -3.84 V. The negative sign indicates that the induced emf opposes the change in current, as expected.

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The EMF induced in the inductor opposing the change in current is approximately 3.84 V.

To find the EMF induced in the inductor, we'll need to use the formula for the induced EMF in an inductor, which is:

EMF = -L × (ΔI / Δt)

Here, EMF is the induced electromotive force, L is the inductance, ΔI is the change in current, and Δt is the time interval during which the current changes.

Given the information in your question, we have:

\(L = 4.00 mH = 0.004 H\) (converting millihenries to henries)
\(ΔI = 8.00 A\) (the current goes from 8 A to 0 A)
\(Δt = 8.33 ms = 0.00833 s\) (converting milliseconds to seconds)

Now, plug the values into the formula:

EMF =\(-0.004 H × (8.00 A / 0.00833 s)\)

EMF = \(-3.8408 V\)

Since we're looking for the magnitude of the induced EMF, we can ignore the negative sign:

EMF = 3.8408 V

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Think about how the tennis ball moves. Let's assume that the tennis ball's velocity is positive while it is moving toward the racket and negative when it is moving away from the racket.

Tennis ball mass, m, is 60 grammes, or 0.060 kilogrammes.

Tennis ball's initial speed before being struck by the racquet is 20 m/s, or v0.

v = the tennis ball's final speed after being struck by the racket = -39 m/s

P = modification of the ball's momentum

The ball's change in momentum is described as

ΔP = m (v - v₀)

Adding the aforementioned values

ΔP = (0.060) (- 39 - 20) (- 39 - 20)

ΔP = - 3.54 kgm/s

thus, the change in momentum's magnitude is 3.54 kg/s.

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Answer:

they go BOOM i seen a gas station do it

Explanation:

Answer:

Possiable answer by edge:

The shape of a river’s stream bed affects the speed and eroding power of a river by influencing the amount of friction between the water flowing through the river and the stream bed below. Friction is the force that opposes the motion of one surface as it moves across another surface. In a river, there is friction between the flowing water and the stream bed beneath it. Where a river is deep, less water comes into contact with the stream bed, so there is less friction. The reduced friction means there is less opposition to the water’s motion, so the river flows at a greater speed and has more kinetic energy for erosion. On the other hand, where a river is shallow, more water comes into contact with the stream bed, so there is more friction. The increased friction means there is more opposition to the water’s motion, so the river flows at a lesser speed and has less kinetic energy for erosion. Also, the roughness of a stream bed covered with boulders and other obstacles causes the water to flow through the river in a turbulent fashion. This could cause the river to move slower in some cases or erode more in other cases.

Explanation:

summary of answer:

influencing the amount of friction between the water flowing through the river and the stream bed below.

Answer:

False, Other guy is wrong

Explanation:

The equation is not the same