As of the time our textbook went to press, 118 different elements had been discovered. All of the ones with atomic number over 92 have been made in physics laboratories. When element 119 (one that has not yet been identified) is found, provided it is like the other artificially made elements, it will:

A

have only protons, no neutrons at all

B

soon be used in industry to make new kinds of plastics

C

have one of the smallest nuclei known

D

only remain stable for an extremely small fraction of a second

E

eventually be found in the Sun (with very high quality spectrometers)

Answer:

When the hands are close together on the handlebars of a bike, the steering is more sensitive and requires more effort to make small adjustments. This is because the steering axis of the bike, which is an imaginary line passing through the center of the front wheel and the center of the steering tube, is shorter. This means that even small movements of the handlebars translate to larger changes in the direction of the front wheel.

On the other hand, when the hands are far apart on the handlebars, the steering is less sensitive and requires less effort to make adjustments. This is because the steering axis of the bike is longer, meaning that larger movements of the handlebars are required to achieve the same change in direction of the front wheel.

Overall, the sensitivity of the steering depends on the length of the steering axis, which in turn depends on the distance between the hands on the handlebars. Therefore, it is more difficult to steer a bike when the hands are close together on the handlebars than when they are far apart.

Explanation:

The mass of an object on which force is exerted which displaces 8m of distance and changes its velocity from 0 to 7.18 m/s is m=F/3.22.

Force(F) applied on the body is mass(m) times its acceleration(a).

i.e. F=ma

according to this equation we get acceleration as

a = F ÷ m this equation says that when we apply more force to the body, more acceleration it gets. When more is the mass of the body, greater force is needed to accelerate with same amount to that less mass.

Given,

Initial velocity u = 0 m/s

final velocity v= 7.18 m/s

Distance s = 8m

According to equation of kinematics,

v²=u²+2as

7.18²=2×8×a

a= 3.22 m/s²

F = ma

F= 3.22×m

m=F÷3.22

if force is given, we can calculate exact mass of an object.

Hence mass of an object is m=F/3.22.

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Answer: 1. Intelligence

2. Creativity

3. Leadership

4. Empathy

5. Resilience

Explanation: NOW READ ONE PIECE MY SON

The advantage of stored digital data that could also be a disadvantage is:

C. Information in stored digital data can be quickly changed.

What is Digital Data?

Digital data is any information that is stored or transmitted in digital form, usually as a series of binary digits (bits). This includes text, images, audio, video, and other types of data that can be represented using a series of 0s and 1s. Digital data is often created and processed using computers and other digital devices, and can be stored and transmitted using various types of digital storage media and communication channels.

While the ability to quickly change information in stored digital data can be advantageous for updating or correcting errors, it can also be a disadvantage if the information is changed inappropriately or maliciously. This can lead to inaccurate or false information being disseminated, potentially causing harm or confusion. Additionally, the ability to quickly change information can make it difficult to verify the accuracy or authenticity of the data. Therefore, while the ability to quickly change information in stored digital data can be beneficial, it is important to use caution and employ proper security measures to ensure the accuracy and integrity of the data.

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To calculate the number of revolutions per minute required to create artificial gravity of 9.80 m/s² in a space station with a diameter of 770 m, we can use the formula for centripetal acceleration: a = (v²)/r

Where a is the centripetal acceleration, v is the velocity of the space station, and r is the radius of the space station. In this case, we want to solve for v, so we can rearrange the formula as: v = sqrt(a * r). Plugging in the given values, we get: v = sqrt(9.80 m/s² * 385 m), v = 62.39 m/s. To convert this to revolutions per minute, we need to know the circumference of the space station, which is: C = 2 * π * r, C = 2 * 3.14 * 385 m, C = 2415.4 m. So the number of revolutions per minute is: rev/min = v / C, rev/min = 62.39 m/s / 2415.4 m/rev * 60 s/min, rev/min = 1.56 rev/min. Therefore, the space station needs to make 1.56 revolutions per minute to create artificial gravity of 9.80 m/s².

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Answer: The cannon ball will hit the floor after 4.24 seconds. It will strike at a distance of 212m from the foot of cliff. As the object is travelling with the zero acceleration due to horizontal movement its final velocity will be 50m/s.

1. No, a portion of the innermost wave front shown in Figure 6 cannot be approximated by a plane wave because the wave front is curved, meaning that the wave does not travel in a straight line.

A wave is a disturbance that propagates through a medium, such as air, water, or a solid material. Waves are caused by a source of energy, such as a vibrating tuning fork or a stone thrown into a pond. Waves can also be generated by seismic activity, such as earthquakes. Waves are characterized by their wavelength (the distance between two successive crests or troughs), frequency (the number of waves generated per unit of time), and amplitude (the maximum displacement of the medium from its equilibrium position).

2. In Figure 7, the source of the ripple waves is moving to the right.
3. If the source of the waves in Figure 7 is stationary, then the ripple tank must be moving to the left.

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Answer:

A. A force can be a push or pull

D. A force can have mass or weight

Answer:

P V = N R T        describes an ideal gas

T2 / T1 = P2 V2 / (P1 * V1) = 4

T1 = 273 + 10 = 283        initial absolute temperature of gas

Core samples provide us with the actual rocks from inside Earth. They are considered direct evidence of Earth's interior.

Rocks from the interior of the Earth are actually sampled via core samples. These are regarded as concrete proof of the interior of the Earth. Because they take a direct sample of the rocks that make up the layers that make up the Earth's surface and core, core samples provide clear proof of what is inside the planet.

Researchers can identify differences in weather patterns and climatic changes across time using geological core samples. Also, there may be proof of species, as well as the sedimentary make-up of lake and river beds, for instance. The dynamic character of the Earth's formation and how it changes through time are directly demonstrated by core samples. Where there are changes in the composition of the Earth can be determined thanks to seismic waves.

Seismograms can be used by geologists to determine the various components of the Earth's internal structure, such as which regions are solid, molten, or made of gases.

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Correct question is:

________ provide us with the actual rocks from inside Earth. They are considered ________ evidence of

Acceleration due  to gravity of the spacecraft at a height of 6400 km from earth's surface is 2.45 m/s²

The acceleration of an object attained due to the gravitational force acting on it is called acceleration due to gravity.

Here,

The acceleration due to gravity on the surface of earth,

g = GM/R²

Acceleration due to gravity at a height h from earth's surface,

g' = GM/(R + h)²

So, g'/g = R²/(R + h)²

Therefore, g' = gR²/(R + h)²

Here, h = 6400 km = Radius of earth, R

so h = R

Therefore,

g' = gR²/(R + R)²

g' = gR²/4R²

g' = g/4 = 9.8/4

g' = 2.45 m/s²

Hence,

Acceleration due  to gravity of the spacecraft at a height of 6400 km from earth's surface is 2.45 m/s²

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Your question was incomplete, but most probably your full question was:

On the surface of the Earth the spacecraft falls at 9.8 m/s². What is the Spacecraft's acceleration at a height 6400 km from Earth?

Yes, the point B floodplain shape. Because the flat region next to the river, which continues until it reaches the neighboring sloping terrain, is the goal of producing flood fields.

These fields are often level areas of land close to rivers, which allows for easy flooding during rainy seasons. Flood damage is lessened by the comparatively low elevation of the flat ground. By establishing floodplains, we can lessen the likelihood of flooding and the devastation it causes.

A productive agricultural field that may be utilized to generate food and other resources, the level terrain also offers the perfect environment for growing crops.

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The question is -

Would a floodplain form at point B? Why or why not?

Conversion of following units:

1. 946000000 mm= 946 km

2. 0.4m = 0.0004 km

3. 0.019m = 19 cm

4. 30,925,800 cm= 309.258 km

5. 0.002651 Lt.=  2.651 ml

6. 0.04854mm= 0.004854cm

Conversion of units is defined as the conversion between different units of measurement for the same quantity by means of multiplicative conversion factors, which change the value of the quantity being measured without changing its effect.

For above given example,

1. 1 Pound= 0.453592kg

So, 200 pounds will equals to 9.07185kg

2. One quarter = 25 cents

13 quarters will have 325 cents.

3. 1 minute= 60seconds

1 hour= 60 minutes= 3600 seconds

1 day= 24hrs or 86400seconds

So, 3days= 259200seconds

4. 1 mile/hr.= 0.44704m/s

So, 30miles/hr.= 13.4112 m/s

Thus, Conversion of following units:

1. 946000000 mm= 946 km

2. 0.4m = 0.0004 km

3. 0.019m = 19 cm

4. 30,925,800 cm= 309.258 km

5. 0.002651 Lt.=  2.651 ml

6. 0.04854mm= 0.004854cm

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The work done on the box, given that it moves 6.50 meters horizontally when a force of 25.72 N is applied is 144.78 J

Work is defined as the product of force and distance moved in the direction of the force. This is given as:

Work done (Wd)  = force (F) × distance (d)

Wd = fd

When certain angle projection is involved, the work done is given as

Wd = FdCosθ

The following data were obtained from the question:

The work done can be obtained as follow:

Wd = FdCosθ

Wd = 25.72 × 6.50 × Cos 30

Wd = 167.18 × Cos 30

Wd =  144.78 J

In conclusion, we can say that the work done is 144.78 J

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The correct explanation for the movement of the compass needle when the direction of the voltage on the battery is switched is (C) The current in the wire produced a magnetic field.

Voltage, also known as electric potential difference, is a measure of the electric potential energy per unit of charge in an electrical circuit. It is the force that drives the flow of electric charge in a circuit. Voltage is usually measured in volts (V) and is represented by the symbol "V".

When an electric current flows through a wire, it creates a magnetic field around the wire. The direction of the magnetic field depends on the direction of the current flow.

This magnetic field interacts with the Earth's magnetic field and causes the compass needle to move. Therefore, as the direction of the current in the wire changes when the voltage on the battery is switched, the direction of the magnetic field around the wire also changes, causing the compass needle to move.

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The kinetic energy of the system does not change.

When two horseshoe magnets are placed next to each other, then they either attract or repel each other, depending on the position of their poles. if the poles are opposite they attract, if they are same they repel with other.

In case, if the poles of two horseshoe magnets are attracted to each other, indicating poles are opposite to each other. when the magnets are brought together then the work must be done to oppose the magnetic field between poles. This increases the potential energy of the system.

However, the question is about the kinetic energy of the system, which is related to the motion of the objects in the system. In this case, once the magnets are brought together they attract each other, they will have zero potential. Therefore, the kinetic energy will not change.

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Magnitude and direction of a vector that is equal to a+b is 19m and 0.0° resp. Hence the correct option is C. magnitude 19 m direction 0.0°

Vector is a mathematical quantity which has both magnitude and direction.

Vectors are denoted with usual notation with an arrow upon it. for example, Force, Displacement, Velocity and Acceleration etc. are the vectors which has both magnitude as well as direction.

When two same vectors are acting at a point in two dimension. The magnitude of  resultant of this two vectors are given by,

R² = R₁² + R₁² +2R₁R₂cosθ......1

Where θ is the angle between them.

The direction of the resultant vector of two same vectors is given by the equation,

tanθ = (R₁ sinθ) ÷ (R₁ + R₂cosθ)......2.

In this picture, we have to find magnitude and direction of vector A+B, we have nothing to do with vector C.

vector A is at 37° from vertical, means 90-37 = 53° from positive x direction.

A = 12 m and 53°

B = 15m and 40°

angle between these two vectors are θ= 53+40 = 93°

magnitude of resultant of this two vectors are A+B which is given by the equation.

putting these values in equ. 1 we get,

R² = 12² + 15² +2(12×15)cos93°

R² = 350.15

R = 18.71 ≅ 19m ( magnitude)

From equation 2

tanα = (12 sin93°) ÷ (12+ 15cos93°)

tanα  = 0.8337

α  = 39.82° this angle is from vector B

so the angle of resultant from positive x axis is 40-39.82 = 0.17 ≅ 0.0°

Hence C is correct option is c: magnitude 19 m direction 0.0°

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Kinetic energy increases because the magnets move in the opposite direction of the field.

A magnet is an object that can attract certain materials, such as iron and steel. Magnets have two poles, a north pole and a south pole, and they can attract and repel other magnets. When two magnets are placed near each other, their magnetic fields interact and the force of attraction or repulsion can be felt. Magnets can also pick up objects made of iron and steel, such as paper clips and nails. Magnets can be made of different materials, including iron, nickel, cobalt, and other alloys. Natural magnets are found in the earth and are known as lodestones.

When two magnets are pulled apart, their relative motion generates a magnetic field that opposes the original field. This increases the kinetic energy stored in the system.

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Answer:

b

Explanation:

The current flowing through the battery is 46.67 A.

The first step is to calculate the equivalent resistance of the circuit, which includes the resistance of the loop and the internal resistance of the battery. Since the points P and Q are connected to the battery, they are effectively in parallel, so the equivalent resistance is,

1/R = 1/40 Ω + 1/0.5 Ω = 0.025 Ω

R = 40 Ω || 0.5 Ω = 0.024 Ω

The total current flowing through the circuit is given by Ohm's law, I = V / (R + r), where V is the voltage of the battery, r is its internal resistance, and R is the resistance of the loop.

Substituting the given values,

I = 24 V / (0.024 Ω + 0.5 Ω) = 46.67 A

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--The complete question is, A circular loop has a resistance of 40Ω. Two points P and Q of the loop, which are one quarter of the circumference apart are connected to a 24V battery, having an internal resistance of 0.5Ω. What is the current flowing through the battery.--

Answer:

Kinetic energy with 1250 J of energy

Explanation:

Kinetic energy formula = [tex]\frac{1}{2}[/tex]m[tex]v^{2}[/tex]

Potential energy formula = mgh

Velocity is given so we'll use kinetic energy

[tex]\frac{1}{2}[/tex]*100*[tex]5^{2}[/tex] = 1250 J

The equations of motion are:

[tex]v=u+at\\v^2=u^2+2as\\s=ut+\frac{1}{2}at^2[/tex]

Hence, the formula for distance (or displacement (s) ), time (t), and acceleration (a) to get to speed (u), is:

[tex]s = ut+\frac{1}{2} at^2[/tex]

The lines of iron fillings will be attracted towards the poles of the magnet on the paper. The fillings gets sticked on the magnet. The glass or plastic will stop the passage of the magnetic lines of force .

Magnetic field lines are lines of force generated by a strong magnetic field. For a bar magnet, the magnetic south pole and north pole are having stronger magnetic fields than the middle part.

When magnetically susceptible materials comes in contact with a magnet they gets attracted to the poles of the magnet. The fields lines of the material gets aligned parallel to the applied field.

Some materials such as paper and glass are not showing magnetic properties. Hence, they can stop the passage of magnetic field lines. If we place a glass or paper in between the poles of a two magnets, they will stick to the glass from both ends due to the attraction to the opposite pole.

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Answer:

Asteroids

Explanation:

this is an asteroid because there is an asteroid belt close or so what close to the sun.

Salt, or NaCl, is an example of an ionic compound. Ionic compounds are formed when a metal combines with a non-metal through the transfer of electrons.

Crystalline compounds are compounds that have a well-defined, ordered, and repeating three-dimensional arrangement of atoms, ions, or molecules in a solid state. In a crystalline compound, the constituent particles are arranged in a highly ordered and repeating pattern called a crystal lattice.

In the case of NaCl, the sodium (Na) donates an electron to the chlorine (Cl), forming an ionic bond between them and resulting in the formation of an ionic compound. Ionic compounds typically have high melting and boiling points, are crystalline in structure, and conduct electricity when dissolved in water.

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The recoil speed of the water pistol, given that the mass of the water pistol is 0.9 Kg is -6.39 m/s

The following data were obtained from the question:

The recoil speed of the water pistol can be obtained as illustrated below:

m₁v₁ = -m₂v₂

(0.025 × 230) = -(0.9 × v₂)

5.75 = -0.9v₂

Divide both sides by -0.9

v₂ = 5.75 / -0.9

v₂ = -6.39 m/s

Thus, we can conclude that the recoil speed is -6.39 m/s

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Where a river flows from an area of hard rock to an area of soft rock, the softer rock may wear away, eventually forming a drop called a waterfall. Thus, the correct option is B.

A waterfall is a river or other body of the water's steep which fall over a rocky ledge into a plunge pool below. Waterfalls are usually also called as cascades. The process of erosion, the wearing away of the earth, plays an important part in the formation of waterfalls in the world.

Waterfalls are generally created when the riverbed changes suddenly from the hard rock to soft rock. Rapids are formed where a fast-flowing river quickly cuts downwards through the waterbed of hard and soft rocks, eroding the soft rock and leaving the hard rocks which are standing above the water surface.

Where a river flows from an area of harder rock to an area of the softer rock, the softer rock may wear away, and it eventually results into the formation of a drop called a waterfall.

Therefore, the correct option is B.

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Answer: inertia

Explanation:

he glass of water has inertia — it will not move unless a big enough force acts on it. The force in this activity pulling on the glass of water is the friction between the tablecloth and the glass.

Mass is a measure of an object's inertia, or resistance to changes in its motion. It is measured in kilograms (kg).

Mass is a physical property of an object that measures the amount of matter it contains. It is measured in kilograms (kg) or in grams (g). Mass is different from weight, which is the measure of the force of gravity on an object. Mass is the same everywhere in the universe and is unaffected by gravity, while weight depends on gravity and can vary from place to place. Mass is an important concept in physics, as it is used to calculate energy, momentum, and other physical properties of an object.

Fnet (net force) is the sum of all the forces acting on an object. It is measured in Newtons (N).

Fapp (applied force) is the force that is applied to an object in order to change its motion. It is also measured in Newtons (N).

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