Calculate the force of gravity between two planets with masses 5 x 1023 kg and 1 x 1022 kg when the distance
between them is 7 x 1016 m. Do not use scientific notation. Round to one decimal.

"Stars in the sky appear to move slowly from east to west" is true about the movement of stars in the night sky.

Answer: Option D

Explanation:

The Sun, Moon and stars all are understood to wake up in the East and set in the West direction, as every 24 hours the Earth rotates on its axis in the reverse direction from West to East. Consequently, the acceleration we witness is not their action, but ourselves as we go zipping onto the Earth's surface to the North, and these gravitational anomalies fly over us. For illustrating this point, the North Star named as Polaris in Ursa Minor is useful.

Stars in the night sky seem to move slowly from east to west due to the Earth's rotation.

Stars in the sky appear to move slowly from east to west. This apparent motion is due to the rotation of the Earth. As the Earth rotates from west to east, the stars appear to move in the opposite direction.

Answer:

a = 0,1[m/s^2]

Explanation:

First we need to indentify the initial data.

And using this kinematic equation we have:

[tex]v = 4[m/s]\\v_{0}= 2 [m/s] \\t = 20[s]\\\\v= v_{0}+a*t\\a=\frac{v-v_{0}}{t} \\a= \frac{4-2}{20} \\a=0.1[m/s^{2}][/tex]

Boyle's Law states that the volume of a gas decreases as pressure increases at constant temperature. This is a fundamental concept in Chemistry.

Boyle's Law, a fundamental principle in Chemistry and Physics, states that at a constant temperature, the volume of a gas is inversely proportional to the pressure applied on it. So, if the pressure on a gas increases and the temperature remains constant, the volume of the gas correspondingly decreases (Option B). In other words, if you squeeze a gas (increasing the pressure), it will take up less space (decreasing the volume), provided the temperature does not change.

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Final answer:

If a star 100 light-years away begins to expand, it will take 100 years for astronomers on Earth to observe the event, as light from the expansion will take that long to travel the distance to our planet.

Explanation:

If a star 100 light-years away from Earth is beginning to expand into a giant star, astronomers will observe this development after 100 years. This delay is because the light from that event will take 100 years to travel the distance from the star to Earth. As light is the fastest thing in the universe, moving at over 186,000 miles per second, it is the speed at which we receive information from the cosmos. So, even if the star began to expand today, we would not be aware of it until 100 years later - when the light showing the star's expansion arrives here. This concept is similar to observing galaxies through the universe, which allows us to see them as they were when the light left them, essentially looking back in time.

Answer:w=mxg

2x10 =20 N

Explanation:force acting downwards is mg mass into gravitional feild

Answer:

The change in momentum of an object is its mass times the change in its velocity.

The formula to calculate the change in momentum of the object is ΔP= m( Vf - Vi).

The change in momentum is equal to the product of the mass and the velocity change. Because mass is a constant value, it remains constant. The change in velocity causes a change in momentum.

The change in momentum is calculated as the difference in the velocities of the object.

Momentum is the product of an object's mass and velocity and describes mass in motion. Impulse: An impulse is a force that causes a change in motion. The change in momentum of an object, p=m(vf-vi) p = m (vf- vI p = m (vf - vI is equivalent to the impulse, J.

Therefore, the formula to calculate the change in momentum of the object is ΔP= m( Vf - Vi).

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Answer:

Correct answer: Ek = 384,000 J = 0.384 · 10⁶ J = 0.384 MJ

                           Ep = 1,092,000 J = 1.092 · 10⁶ J = 1.092 MJ

                           Et  = 1,476,000 J = 1.476 · 10⁶ J = 1.476 MJ

Explanation:

The total energy at all times is equal to the sum of kinetic and potential energy.

Et = Ep + Ek

We will take the bottom of the mine as a reference point

We can solve this problem combined with the help of kinetics and energy conservation laws, or just with energy conservation laws, which I will do.

Before we drop a rock the potential energy is maximum and the kinetic energy is equals to zero.

The formula for calculating potential energy is:

Ep = m g h ,  we will take that g = 10 m/s²

This is the maximum potential energy (or total energy)

Epmax = Et = 12 · 10 · 12,300 = 1,476,000 J = 1.476 · 10⁶ J = 1.476 MJ

After a fall of 3,200 m the rock will be on height of 9,100 m and its potential energy will be:

Ep = m g h₁ = 12 · 10 · 9,100 = 1,092,000 J = 1.092 · 10⁶ J = 1.092 MJ

The difference between the maximum potential energy (or total energy) and the potential energy at height h₁ is actually kinetic energy.

Ek = ΔEp = Et - Ep = 1,476,000 J - 1,092,000 J

Ek = 384,000 J = 0.384 · 10⁶ J = 0.384 MJ

God is with you!!!

The student has traveled approximately 56.57 meters east.

In this case, the student has traveled 80 meters in a northeast direction. To determine how far east the student has traveled, we need to find the eastward component of their displacement.

Since the northeast direction can be broken down into equal north and east components, we can use trigonometry to determine the eastward displacement.

By using the sine function, we can find that the eastward displacement is approximately 56.57 meters.

A body that goes a distance and then returns to its starting point has the same beginning and ending points. In this case, the displacement is zero, but the distance travelled is not. It is possible to have zero, negative, or even positive displacements.

Therefore, the average velocity is usually 0 when the overall displacement is zero. To gain a better understanding, keep in mind that a body's displacement is a vector, meaning it depends on its direction. Its precise definition is the object's position change rate in a given direction.

The new kinetic energy of the bowling ball is 108 J,

Answer:

Explanation:

Any object in motion will experience an amount of kinetic energy. So the kinetic energy is directly proportional to the product of mass and square of velocity of the object. In the present case, the bowling ball is experiencing a kinetic energy of 12 J.

So, K.E. = 12 J = [tex]\frac{1}{2}mv^{2}[/tex]

As the ball will be having same mass, so when the velocity is increased three times of old velocity, so new speed will be 3v, where v is the old speed. Then the new kinetic energy will be as below:

New kinetic energy = [tex]\frac{1}{2}m(3v)^{2} = \frac{9}{2}mv^{2}[/tex]

Since we know that [tex]\frac{1}{2}mv^{2}[/tex] = 12 J, substitute this in new kinetic energy equation and we get

New kinetic energy = 9 × 12 J = 108 J.

Hence the new kinetic energy of the bowling ball is 108 J, when the new speed is three times the old speed,

While the elevator is speeding up from zero to 3.25 m/s, the scale reads something more than 600N. But once the elevator settles into a constant speed ... whatever that is ... the scale settles back to 600N.

Based on the graph, I would say the correct answer is 11 meters.

The reason I say this is because if you look at the orange line. He's leaving the park to his home. Is shows that it's 11 meters away. The green line is just there to trick you. It shows that you were already 5 meters closer to the park then at home.

Answer:

the force would not change

Explanation:

the answer is the force would double. i just did the test and got it right!

Answer:

30 minutes

Explanation:

Use half life equation:

A = A₀ (½)^(t / T)

where A is the final amount, A₀ is the initial amount, t is time, and T is the half life.

A = A₀ (½)^(t / T)

62.5 = 500 (½)^(t / 10)

0.125 = ½^(t / 10)

t / 10 = 3

t = 30

It will take 30 minutes.

Final answer:

To find the time it takes for a 500 g sample of Nitrogen-13 to be reduced to 62.5 g, we can use the equation for radioactive decay. The time is approximately 40 minutes.

Explanation:

To solve this problem, we can use the equation for radioactive decay: N = N0 * (1/2)(t/t1/2), where N is the final amount, N0 is the initial amount, t is the time passed, and t1/2 is the half-life. In this case, we have N = 62.5 g, N0 = 500 g, and t1/2 = 10 minutes. Substituting these values into the equation:

62.5 g = 500 g * (1/2)(t/10)

Now, we can solve for t by taking the logarithm of both sides and rearranging the equation:

t = 10 * log2(62.5/500)

Using a calculator, the value of t is approximately 40 minutes.

b. Thermal energy flows out of the water into the air in the freezer

Explanation:

Mass refers to the amount of matter in an object. It is a measure of the quantity of particles (atoms and molecules) comprising an object.

Weight, on the other hand, is the force exerted on an object due to gravity.

The terms "weight" and "mass" are often used interchangeably, but they are actually two different things.

Mass is a measure of the amount of matter in an object. It is a scalar quantity, which means that it has magnitude only. Mass is measured in kilograms (kg) or grams (g). The mass of an object does not change, regardless of where it is located or how it is moving.

Weight is a measure of the force exerted on an object due to gravity. It is a vector quantity, which means that it has both magnitude and direction. Weight is measured in newtons (N).

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The answer & explanation for this question is given in the attachment below.

The magnitude of the gravitational force exerted on a rider of mass m during both ascent and descent on an amusement park ride is defined as F = mg, with F being the gravitational force, m the mass of the rider, and g the acceleration due to gravity (~9.81 m/s²).

The gravitational force exerted on a rider with a mass m during both ascent and descent in an amusement park ride is characterized by the same magnitude. This force is given by the expression F = mg, where F is the gravitational force, m is the mass of the rider, and g is the acceleration due to gravity, which is approximately 9.81 m/s² on Earth. Let's break this down:

In both scenarios, note that the actual sensation the rider feels (the 'felt' force) might be different due to the combination of gravitational force and the inertia of the rider's body. This inertia entails a resistance to changes in motion and can lead to what we often describe as the 'thrill' of the ride.

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Answer:

48Ω

Explanation:

V = I*R

R = Resistance = ?

V = Voltage = 24volt

I = Current = 1/2amp

Therefore,

R = V / I = 24 / (1/2)

R = 24 * 2

R = 48Ω

The image of distance (di) of the object is 13.33 cm.

Explanation:

Given data in the problem,

The object located at a distance from the convex lens.

do = 40.0 cm

The distance at which the light is focused.

f= 10.0 cm.

We need to find the image of distance di.

The lens equation gives the quantitative relation among the image distance (di), the object distance (do), and the focal length (f).

The equation is given by,

[tex]\frac{1}{f} =\frac{1}{di} +\frac{1}{do}[/tex].

[tex]\frac{1}{10} =\frac{1}{di} +\frac{1}{40}[/tex].

[tex]\frac{1}{10} -\frac{1}{40} =\frac{1}{di}[/tex].

[tex]\frac{4-1}{40}=\frac{1}{di}.\\[/tex]

[tex]\frac{3}{40} = \frac{1}{di}[/tex].

3 di=40.

di=[tex]\frac{40}{3}[/tex].

di = 13.33 cm

The image of distance (di) of the object is 13.33 cm.

Answer:16875joules

Explanation:

Mass=m=150kg velocity=v=15m/s

kinetic energy =(m x v^2)/2

Kinetic energy =(150x15^2)/2

Kinetic energy =(150x225)/2

kinetic energy =33750/2

Kinetic energy =16875joules

Answer:

(C) acceleration is a change in velocity.

Explanation :

Acceleration is the rate of change of velocity with time.

Acceleration is the rate at which velocity changes, making option C ('Acceleration is a change in velocity.') the most accurate description of the relationship between velocity and acceleration.

The most accurate description of the relationship between velocity and acceleration is that acceleration is the rate at which velocity changes. Therefore, the correct answer to the question is 'C. Acceleration is a change in velocity.'

Acceleration is a vector quantity, which means it has both magnitude and direction. It can result from a change in speed, a change in direction, or both. Velocity is also a vector that describes the speed of an object in a given direction. When an object's velocity changes, it is accelerating, which can be a result of increasing speed, decreasing speed, or changing direction.

In summary, while velocity is the rate of change of position with time, acceleration is the rate of change of velocity with time.

Which statements describe the Mercalli scale? Check all that apply. This scale measures seismic waves based on their size. This scale rates an earthquake according to how much damage it causes. This scale produces a single rating for earthquakes that reach the surface. This scale uses Roman numerals to rank the damage caused by an earthquake. This scale measures the magnitude of an earthquake based on the size of seismic waves.

This scale rates an earthquake according to how much damage it causes.

This scale uses Roman numerals to rank the damage caused by an earthquake.

The intensities of the earthquake can be easily measured with the scale called The Mercalli intensity scale. The Scale called the Richter scale considers the energy of the earthquake. But the Mercalli scale will not consider the energy of the earthquake.

The effects of the earthquake is considered by the Mercalli scale and then the intensity of the earthquake will be calculated based on the effects that is being observed.It is a type of linear measurement. It uses the Roman numerals for the purpose of ranking the damages that are caused by the earthquake.

Answer:

This scale rates an earthquake according to how much damage it causes.

This scale uses Roman numerals to rank the damage caused by an earthquake.

Explanation:

Its CORRECT because I passed the test 100% on e d g e n u i t y 2020

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

Answer: Repulsion, Minimum, Attraction, Maximum

Explanation:

The Concept of attraction & Repulsion

The basic concept of attraction and repulsion between two similar and opposite poles of a bar magnet is that the ends of two bar magnets with similar strongly repel each other whereas poles of opposite polarity attract each other.

Since B and C are of opposite polarity, they will repel each other with minimum forces whereas A and D are of opposite polarity as well, hence they will attract each other with maximum forces when placed together.

We can flip the options accordingly saying, B and C will have the maximum attraction while A and D will have the minimum repulsion when placed together.

The amount of solar energy that reaches Earth is changed by Milankovitch cycles.

Explanation:

The Milankovitch cycles affect the amount of solar energy reaching Earth through changes in Earth's orbital shape and axial tilt over thousands of years. The correct option is B) the amount of solar energy that reaches Earth.

The Milankovitch cycles affect the amount of solar energy that reaches Earth. These cycles consist of changes in Earth's orbit and axial tilt over thousands of years. Of the options provided, B) the amount of solar energy that reaches Earth is the aspect that is changed by the Milankovitch cycles. Specifically, eccentricity, which is one of these cycles, alters the shape of Earth's orbital path from more circular to more elliptical over approximately 100,000 years. This affects the proximity of Earth to the sun during various parts of the orbit, thereby influencing the solar radiation the planet receives.

Answer:

Workdone = 12.2 Joules

Explanation:

Given:

Force applied on the pencil = 47 N

Displacement of the pencil = 0.26 m

We have to find the work done .

Note:

Workdone = Product of force and its displacement (in the direction of the force) .

So,

Plugging the values.

Workdone = [tex]Force\times displacement[/tex]

⇒ [tex]W=F\times d[/tex]

⇒ [tex]W =47\times 0.26[/tex]

⇒ [tex]W=12.2[/tex] Joules (J)

OR

We can say that the displacement is against the direction of applied force.

Displacement = - 0.26

Workdone = [tex]F\times d\times cos(\theta)[/tex]

⇒ [tex]\theta[/tex] is the angle between force and displacement.

⇒ Here, [tex]\theta=180[/tex]

⇒ [tex]cos(180) = -1[/tex]

Workdone (W)  = [tex]Fdcos(\theta)[/tex]

⇒ [tex]47\times -0.26\times -1[/tex]

⇒ [tex]12.2[/tex]  Joules (J).

Workdone on pushing the pencil = 12.2 Joules.

Work is the product of the force and displacement. The work done by in the given situation 12.2 J.

Work:

It is the change in the energy due displacement  of the object by the applied force. Work is the product of the force and displacement.

W = f.d

Where,

W - work

f- force =  47 N

d - displacement = 0.26 m.

put the values in the formula,

W =  47 N x 0.26 m.

W = 12.2 J

Therefore, the work done by in the given situation 12.2 J.

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Answer:

Description 1 matches C.

Description 2 matches A.

Description 3 matches D.

Description 4 matches B.

Explanation:

Description 1 matches C. From graph C, we can see that the distance remains constant at a particular value. Hence, the car is not traveling and hence it is stopped.

Description 2 matches A. Speed is determined by the gradient of a distance-time graph. A depicts a linear graph which tells us that the gradient is constant and hence the car is at constant speed. The fact that the distance is increasing shows that the car is moving forward.

Description 3 matches D. Graph of D becomes less steeper as time progresses. This tells us that the gradient of the graph is decreasing and hence the speed of the car is decreasing.

Description 4 matches B. Graph B shows distance being decreased. This tells us that the car is coming back.

Answer:

Boron, silicon, germanium, arsenic, antimony, tellurrin, polonium, Astatine

Explanation:

Friction decreases the kinetic energy which decreases the mechanical energy.

When two object moves one over the other, the resistance that is faced by the object is called as the friction. Any force that restricts the motion of any moving or any object that is sliding is called as friction. A kinetic energy can be considered as a non conservative energy that reduced the mechanical energy of any moving objects.

A friction can be considered as a force that resits motion of an object. When there a movement of two objects one against the other, there will be a conversion of kinetic energy into heat energy. This conversion is caused by the friction. Thus, the kinetic energy reduces the mechanical energy and they will be converted into heat energy.

Friction is a force that opposes motion, transforming mechanical energy into other forms like heat, effectively reducing the system's mechanical energy.

Friction is a force that opposes the movement or motion of an object. In a system, when there is movement, friction comes into play. Mechanical energy is the sum of kinetic and potential energy in a system. As friction acts against movement, it transforms the mechanical energy within the system into other forms of energy, such as heat energy, which reduces the system's mechanical energy. Let's consider a sliding block for example. As the block slides, the friction between the block and the surface generates heat, thus reducing the mechanical energy (kinetic energy) of the block.

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There is a 33% chance of a large earthquake off the coast of Oregon.

The two main concerns of a large earthquake are Gas fires and Tsunami .

Explanation:

Everytime a large earthquake hits in any other part of the world, We find a small earthquake hitting off the coast of Oregon.

So scientists feel that as United States is prone to Earthquakes, the people have to be prepared for such eventualities.

The main concern for this large earthquake is, that it might lead to gas leakages at homes that can start a gas fire, which might spread. So people have to be careful and check  on any gas leakages.

Such large earthquakes can also lead to tsunami waves. So people have to take precautions and evacuate, if they are near the coastline.

Gasoline stores chemical energy, which can be transformed to other types of energy via chemical reactions, such as the combustion in a car engine.

The energy encapsulated within gasoline can be precisely characterized as chemical energy. This type of energy is encapsulated within the chemical bonds of various compounds, encompassing molecules and atoms. It is significant to note that chemical energy, as a versatile energy form, can be both liberated and harnessed as a source of power in diverse applications.

In the case of gasoline, it represents a potent reservoir of chemical energy. When gasoline undergoes combustion in the engine of a car, it engages in a chemical reaction. This reaction leads to the release of the energy contained within the chemical bonds of gasoline molecules. This released energy manifests in the form of mechanical power, propelling the vehicle, and heat energy, which warms the engine and the surrounding environment. In this process, gasoline's chemical energy is converted into mechanical and thermal energy, illustrating the dynamic interplay between different forms of energy in our daily lives.

The precise understanding of chemical energy's role in powering engines and facilitating various industrial processes underscores the fundamental principles of energy transformation and utilization, forming the basis of many technological advancements and applications.

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