A heat transfer of 9.8 ✕ 105 J is required to convert a block of ice at -12°C to water at 12°C. What was the mass of the block of ice?

Carbon belong to Group IV of elements; meaning it can bond with 4 Group I atoms such as Hydrogen to form CH4.

The answer is One atom of carbon can bond with up to four other atoms.

One atom of carbon:

does not has four electron shells

cannot  form a special shape called a tetrahedron

is not part of all inorganic compounds

so only right ans left: can bond with up to four other atoms

Magnetic field lines are hypothetical lines which shows the magnetic field around the bar magnet

It is basically the force on a small hypothetical north pole if it is placed near the bar magnet

So if we place a small hypothetical north pole near North pole of bar magnet then it will experience a repulsive force due to north pole so it will be away from the north pole

Similarly if we put the small hypothetical bar magnet near South pole of magnet then it will be attracted towards the south pole then we can say that the magnetic field lines is towards the south pole

So the correct option must be

Arrows point away from north and toward south.

Magnetic field lines for a bar magnet point away from the north pole and toward the south pole, following the direction a north pole of a compass needle would point when placed near the magnet.

If you drew magnetic field lines for a bar magnet, the arrows on the magnetic field lines would point away from the north pole of the magnet and toward the south pole. This is because magnetic field lines are defined by the direction in which the north pole of a compass needle points. As explained in various figures, when placing a compass near a bar magnet, the north pole of the compass (which is actually a magnetic south pole) is repelled by the bar magnet's north pole and attracted to the bar magnet's south pole. Hence, this indicates the direction of the magnetic field lines from north to south outside the magnet.

Inside a bar magnet, these magnetic field lines form continuous closed loops, eventually connecting the south pole back to the north pole within the magnet. Therefore, the correct statement about the direction of magnetic field lines is that they point away from the north pole and toward the south pole of a bar magnet.

Given:                                                                                                        

m1= 13000 Kg     (mass of the 1st object)                                                                                 

m2= 7800 kg        (mass of thesecond object)                                                                            

 r= 0.23 m  (distance between the two objects)

Now F= (G×m1×m2)÷r^2

G= 6.67x10^-11 Nm^2/Kg^2 (G is the gravitational constant)

F = (6.67x10^-11 ×1300×7800) ÷ (0.23)^2 =  0.0127852N

The attached free-body diagram shows the forces that are responsible for the skier coming to rest eventually on the incline.

We see that the component of his Weight along the incline [tex]mgSin \alpha[/tex] and the Friction both act in tandem to stop him.

In order to calculate the Friction, we can make use of Newton's 2nd law, which states that [tex]F_{net}  = ma[/tex]

The [tex]F_{net}[/tex] here is given by [tex]mgSin \alpha + F_{k}[/tex], where [tex]F_{k}[/tex] is the Kinetic Friction.

We also know that the magnitude of Friction Force can be calculated using the equation [tex]F_{k} =[/tex] μ.[tex]F_{N}[/tex], where [tex]F_{N}[/tex] is the Normal Force acting perpendicular to the incline as shown in the figure.

We see that [tex]F_{N}  = mgCos \alpha[/tex] since they both balance each other out.

Hence, putting all these together, we have [tex]mgSin \alpha +[/tex]μ.[tex]mgCos \alpha = ma[/tex]

Simplifying this, we get [tex]gSin \alpha +[/tex] μ[tex]gCos \alpha = a[/tex]

We clearly see that we need to calculate the acceleration before we can obtain the value of the Coefficient of Friction μ

And for that, we make use of the following data obtained from the question:

Initial Velocity [tex]V_{i}  = 11.0 m/s[/tex]

Final Velocity [tex]V_{f} = 0[/tex]

Displacement along the incline [tex]D = 15m[/tex]

Acceleration a = ?

Using the equation [tex]V_{f} ^{2}  = V_{i} ^{2}  + 2aD[/tex], and

Plugging in known numerical values, we get [tex]0 = (11)^{2} + 2a(15)[/tex]

Solving for a gives us, [tex]a = -4.03 m/s^{2}[/tex]

Since the negative sign indicates that this is deceleration, we can ignore the sign and consider the magnitude alone.

Thus, plugging in [tex]a = 4.03 m/s^{2}[/tex] in the force equation we wrote above, we have

[tex](9.8)Sin (17) +[/tex] μ.[tex](9.8)Cos (17) = 4.03[/tex]

Solving this for μ, we get its value as μ = 0.124

Thus, the average coefficient of friction on the incline is 0.12

To find the average coefficient of friction for the skier, you need to set the work done by friction equal to the loss in kinetic energy, and solve for the coefficient of friction. This situation is independent of the skier's mass. Using given information about speed, distance travelled up the incline, angle of incline, and acceleration due to gravity, you can calculate the coefficient of friction.

To calculate the average coefficient of friction in this scenario involving a skier on an incline, you need to use the principle that the work done by friction is equal to the kinetic energy lost by the object. The skier's initial kinetic energy is given by (1/2)mv², where m is the mass of the skier and v is the speed (11 m/s). The work done by friction is given by Fd, where F is the force of friction and d is the distance travelled up the incline (15 m).

Since the force of friction is equal to μN (where μ is the coefficient of friction and N is the normal force), we substitute N = mg cos θ (where θ is the angle of incline, g is the acceleration due to gravity, and m is again the mass of the skier).

After setting the work done by friction equal to the loss in kinetic energy and solving for μ, one can obtain the average coefficient of friction.

Note that in this set up, the mass of the skier cancels out, meaning the result is independent of the skier's mass. Assuming the acceleration due to gravity to be approximately 9.8 m/s², and the angle of inclination to be 17 degrees, the resulting average coefficient of friction would be determined through this method.

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Force = Mass x Acceleration

To solve for Mass, we need to divide both sides by the acceleration.

Force / Acceleration = Mass

Since our Force = 100N and our Acceleration = 10m/s^2, we can just plug these values into the equation that is = Mass.

Force / Acceleration = Mass

Mass = (100N)/(10m/s^2) = 10 kg

Given:

Force(F): 100 N

Acceleration: 10 m/s^2

Now we know that

F= mx a

Where F is the force acting on the object which is measured in Newton

m is the mass of the object measured in Kg

a is the acceleration measured in m/s^2

Substituting the given values in the above formula we get

100= 10m

m= 10 Kg

Given:

m(mass of the box)=10 Kg

t(time of impact)=4 sec

u(initial velocity)=0.(as the body is initially at rest).

v(final velocity)=25m/s

Now we know that

v=u+at

Where v is the final velocity

u is the initial velocity

a is the acceleration acting on the body

t is the time of impact

Substituting these values we get

25=0+a x 4

4a=25

a=6.25m/s^2

Now we also know that

F=mxa

F=10 x6.25

F=62.5N

Answer is false.

An electromagnetic wave is a non-mechanical wave which does not require a medium for its transmission. This travels even through vacuum. Examples of electromagnetic waves are radio wave, X ray, infra red rays,gamma rays etc.

A mechanical wave requires a medium for transmission. There are three types of mechanical waves namely transverse waves, longitudinal waves and surface waves. Some of the examples of mechanical waves are sound waves,water waves and seismic waves.

The answer is A- Venus has phases.

The Copernicus's heliocentric (Sun-centered) theory stated that the Sun is at rest near the center of the Universe, and that the Earth, spinning on its axis once daily, revolves annually around the Sun. He proved this theory by discovering that Venus went through phases just like the moon by recording his observations through the telescope.He also disproved the theory that the sun and other planets revolve around the earth through his recorded observations seen via the telescope.

The discovery Galileo made to support the theory that the planets, including Earth, orbit the Sun is that Venus has phases.

This is defined as a planet's area that reflects sunlight when viewed from a given point with the duration being inclusive.

Galileo discovered that Venus has phases which depicts that planets, including Earth, orbit the Sun.

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Convection occurs through heat transfer due to a difference in density in the fluids.

Consider a pot of water being heated. The water in the pot gets heated rises ,it provides energy for the particles in the water to move and thus the water expands which results in the density of the water becoming less. These particles rise up till the top of the pot owing to the property of very less density of the particles.

Then after some time, it cools down which results in increase of the density of the particles. The heavier denser particles sink to the bottom and is once again heated and rises and this process continues unless all the water particles in the pot are heated and warmed.This transfer of energy by the movement of particles cause convection.

During the day the heat surface above the earth exposed to the sun's rays is heated. This rise in temperature,decreases the density of the air and the warm air rises.

This air cools down and becomes denser. This dense cool air sink back and forces the warm air to rise again.

This transfer of movement of particles causes convection. This cycle is the cause of winds and thus energy is transferred through the atmosphere.

Final answer:

Density plays a crucial role in convection currents as it dictates that less dense, warmer fluid will rise, while denser, cooler fluid will sink, facilitating heat transfer through fluids.

Explanation:

The role density plays in the movement of convection currents is foundational to how heat is transferred through fluids (gases and liquids). Density is inversely related to temperature: as the temperature of a fluid increases, it becomes less dense due to thermal expansion. This property causes warmer, less dense fluid to rise, while cooler, denser fluid sinks under the influence of gravity, creating a convection current. This process results in the transfer of heat from warmer regions to cooler ones. An example of this can be seen when water is heated in a pot on the stove—hotter water expands and rises to the top, while cooler water sinks to the bottom, creating a cycle that evenly distributes the heat.

Thus each supplementary level will obtain the construction of tub with x so make the unit "cm".  It can be x cm. Presently we understand that the highest cavity is 20 cm, and it is also x*y, where y is the number of floors. Consequently, we possess x*y=20 since the number of floors is:

20/x  =

Answer:

Just because due to difference in mass,m. The Sun posses more gravitational power,G and exerts a force,F(g) on the planets to move around it. As the planets do not fall into the star, as they also have a movement upon there very position or spot.

Explanation:

There are a number of objects inside the solar system, as the planets, satellites and the Star which is obviously the red giant known as the Sun varies in there mass,m. As the value of the mass,m contributes in creating the amount of gravitational force,G acting on one another.

So, the planets posses an amount of mass in it and contributes to creating the intensity of force that it posses while interacting with one another inside the solar system. While the planet has less weight as compared to the Sun so, they have less gravitational pull with them, but they don't fall into the star just because they also moves side ways in the orbit.

Answer is B. It is a metalloid.

Metalloid is a chemical element that has characteristics of both metals and non- metals.

Antimony is brittle,is a poor conductor of heat and electricity,has a low boiling point and is a crystalline solid. These are some of the characteristics which a non-mechanical has.

It can also be classified as a metal due to its ability to form alloys easily and due to it's shiny silver appearance.Antimony alloys are used in batteries.

To receive AM radios with a resonance frequency between 500 and 1650 kHz using a fixed 3.83 µH inductor, the capacitor needs to have a value between approximately 0.20 and 2.19 nF.

In order to receive AM radio signals, you indeed need an RLC circuit to resonate at frequencies between 500 and 1650 kHz. The resonant frequency (f) of an LC (inductor-capacitor) circuit can be calculated with the formula: f = 1 / (2π√(LC)), where L is the inductance and C is the capacitance. Considering a fixed inductance of 3.83 µH, the capacitor's value needs to vary to alter the resonant frequency.

To find the range of capacitance, we can resolve the formula for C on the given frequency boundaries. So, for 500 kHz (or 500,000 Hz), the formula becomes: C = 1 / (4π²f²L) = 1 / (4 * (3.14)² * (500,000)² * 3.83 * 10^-6), giving you approximately 2187.87 picofarads (or about 2.19 nF), and for 1650 kHz (or 1,650,000 Hz), roughly 200.23 picofarads (or 0.20 nF).

Therefore, to tune into any station in this AM frequency band, your variable capacitor should have a range of about 0.20 to 2.19 nF.

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The range of capacitance needed for the variable capacitor is from approximately 0.2434 nF to 26.47 nF.

To determine the range of capacitance needed for the variable capacitor to resonate at any frequency between 500 and 1650 kHz with a fixed inductor of 3.83 µH, we can use the formula for the resonant frequency of an RLC circuit:

[tex]\[ f = \frac{1}{2\pi\sqrt{LC}} \][/tex]

where f is the frequency in hertz, L  is the inductance in henrys, and  C  is the capacitance in farads.

First, we need to convert the inductance from microhenrys to henrys:

[tex]\[ L = 3.83 \times 10^{-6} \, \text{H} \][/tex]

Now, we solve for  C in terms of  f and  :

[tex]\[ C = \frac{1}{(2\pi f)^2 L} \][/tex]

For the smallest frequency (500 kHz), we have:

[tex]\[ f_{\text{min}} = 500 \times 10^3 \, \text{Hz} \][/tex]

[tex]\[ C_{\text{max}} = \frac{1}{(2\pi f_{\text{min}})^2 L} \][/tex]

[tex]\[ C_{\text{max}} = \frac{1}{(2\pi \times 500 \times 10^3)^2 \times 3.83 \times 10^{-6}} \][/tex]

[tex]\[ C_{\text{max}} \ = \frac{1}{(3.14159 \times 10^6)^2 \times 3.83 \times 10^{-6}} \][/tex]

[tex]\[ C_{\text{max}} \ = \frac{1}{9.8696 \times 10^{12} \times 3.83 \times 10^{-6}} \][/tex]

[tex]\[ C_{\text{max}} \ = \frac{1}{37.769 \times 10^{6}} \][/tex]

[tex]\[ C_{\text{max}} \ = 26.47 \times 10^{-9} \, \text{F} \][/tex]

[tex]\[ C_{\text{max}} \ =26.47 \, \text{nF} \][/tex]

For the largest frequency (1650 kHz), we have:

[tex]\[ f_{\text{max}} = 1650 \times 10^3 \, \text{Hz} \][/tex]

[tex]\[ C_{\text{min}} = \frac{1}{(2\pi f_{\text{max}})^2 L} \][/tex]

[tex]\[ C_{\text{min}} = \frac{1}{(2\pi \times 1650 \times 10^3)^2 \times 3.83 \times 10^{-6}} \][/tex]

[tex]\[ C_{\text{min}} \ = \frac{1}{(1.0367 \times 10^7)^2 \times 3.83 \times 10^{-6}} \][/tex]

[tex]\[ C_{\text{min}} \ =\frac{1}{1.0744 \times 10^{14} \times 3.83 \times 10^{-6}} \][/tex]

[tex]\[ C_{\text{min}} \ = \frac{1}{4.109 \times 10^{8}} \][/tex]

[tex]\[ C_{\text{min}} \ =24.34 \times 10^{-10} \, \text{F} \][/tex]

[tex]\[ C_{\text{min}} \ = 243.4 \, \text{pF} \][/tex]

To express [tex]\( C_{\text{min}} \)[/tex] in nF:

[tex]\[ C_{\text{min}} \ = 0.2434 \, \text{nF} \][/tex]

Answer:

Price will also increase.

Explanation:

If there is an increase in demand for a product, keeping other factors constant, price of product will also rise. According price demand curve demand of a product and price of product in direct proportional relationship with each other. So as demand of any product increases, its price will also increase simultaneously.

Any surface, when observed under a sufficiently powerful microscope can be seen to have a lot of irregularities (Refer to the attached figure). When two such surfaces come into contact with each other, given adequate amount of time, the irregularities can interlock quite well with one another. Thus, in the case of Static Friction, because the surfaces are not moving relative to each other, the irregularities interlock very well, thus requiring a greater amount of force to dislodge one object from the other.

On the other hand, when an object is moving, the irregularities are not given sufficient time to interlock well with one another and hence, lesser force is required to dislodge one object from the other.

Under such a scenario, we can intuitively understand that when a lubricant is put on a surface, it would occupy the spaces left by the irregularities, thus filling them and not giving a chance for another object's irregularities to interlock. Hence, we see this as a great reduction in the overall friction force.

Storage form of energy:

Potential energy:

All stationary objects are having potential energy stored in it. This energy can be transferred in form of kinetic energy when it comes in the motion from rest. Example, An object placed at height h having potential energy in it. When it comes in motion from the rest the potential energy is converted into kinetic energy.

Nuclear energy:

Nuclear energy is energy that is stored in nucleus of any element. Example, fusion reaction on sun gives earth solar energy.

Electric energy:

Electrical energy is due to movement of the electrical charges. Example, In elctrical batteries electrical energy is stored.

Thermal energy:

Thermal energy is the internal energy of a substance that is transferred to other substance in the form of heat. Example, on heating water is a beaker stem energy is developed.

Magnetic energy:

Magnetic energy is the potential energy stored in the magnetic field. Example, using magnetic energy electric field is produced according to Faraday's law.

Energy has various stored forms, including chemical, mechanical, radiant, electrical, and gravitational potential energy.

Energy can be categorized into multiple storage forms. We often see energy transforming from one form to another in everyday situations.

Chemical Energy: This is stored in the bonds between atoms and molecules. For instance, the energy stored in the bonds of a glucose molecule that our bodies break down for fuel.

Mechanical Energy: It's the sum of kinetic and potential energy associated with the motion and position of an object. A working windmill is an example of mechanical energy.

Radiant Energy: It's the energy of electromagnetic waves. For example, the light emitted by the sun.

Electrical Energy: This involves the movement of charged particles. An example would be the energy that drives your computer or mobile device.

Gravitational potential energy: It's depends on an object's height above the ground. The potential energy of a book on a shelf, for example, becomes kinetic energy when the book falls, which proves the energy's existence.

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Given:

m= 50 g =0.05 Kg

Velocity= 70m/s

t=0.05 sec

acceleration= velocity/time

acceleration=70/0.05

acceleration= 1400 m/s∧2

Force= mass x acceleration

Force= 0.05 x 1400 =70 N

The position vector of the bullet has components

[tex]x=v_0t[/tex]

[tex]y=1.4\,\mathrm m-\dfrac g2t^2[/tex]

The bullet hits the ground when [tex]y=0[/tex], which corresponds to time [tex]t[/tex]:

[tex]1.4\,\mathrm m-\dfrac g2t^2=0\implies t=0.53\,\mathrm s[/tex]

The bullet travels 168 m horizontally, which would require a muzzle velocity [tex]v_0[/tex] such that

[tex]168\,\mathrm m=v_0(0.53\,\mathrm s)[/tex]

[tex]\implies v_0\approx320\,\dfrac{\mathrm m}{\mathrm s}[/tex]

In the given physics problem, the bullet travels horizontally 168 meters before hitting the ground from a height of 1.4 meters. By calculating the time it takes for the bullet to fall to the ground due to gravity and then applying that time to the horizontal distance traveled, we find that the speed of the bullet when it exited the rifle was approximately 313.43 m/s.

The scenario defined is a classic Physics problem where an object is fired horizontally and falls to the ground due to gravity. We can calculate the horizontal speed of the bullet using the equations of motion associated with the vertical, free-fall motion of the bullet.

Gravity causes the bullet to fall to the ground. As we know that the height from the ground is 1.4 meters, we can calculate the time taken for the bullet to hit the ground using the equation: time = sqrt(2 * height / g), where g is the gravitational constant (approx. 9.8 m/s^2).

Substituting the given value, we get time = sqrt(2 * 1.4 / 9.8), which is around 0.536 seconds. The bullet travels 168 meters in this time horizontally, therefore its horizontal speed will be distance / time, which is 168 meters / 0.536 seconds = 313.43 m/s. So, Madelin's bullet had a speed of around 313.43 m/s when it exited the rifle.

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Now we know by Ohm's law that

Ohm's law states that the current through a conductor between two points is directly proportional to the voltage across the two points.

Introducing the constant of proportionality, the resistance,the Ohm's law can be mathematically represented as

V=I x R

Where V is the voltage measured in volts

I is the current measured in amperes

R is the resistance measured in ohms

Given:

I = 2 A

V= 110 V

Applying Ohm's law and substituting the given values in the above formula we get

V=I x R

110 = 2 X R

R = 55 ohms

Final answer:

The resistance of the electric iron that is connected to a 110 V circuit and has a current of 2 A flowing through it is 55 ohms.

Explanation:

To calculate the resistance of an electric iron that is used in a 110 V circuit with a current of 2 A, we use Ohm's law, which is stated as V = IR, where V is voltage, I is current, and R is resistance. Rearranging the formula to solve for resistance gives us R = V/I. Plugging in the values provided, we get R = 110 V / 2 A, which gives us a resistance of 55 ohms.

Given:

m16=2.66 x 10^-26 kg

v=3.7 x 10^6 m/s

B= 2.0

These are singly charged hence

q=1.6 x 10^-19 C

The ratio of these two masses is 16 to 18.

Let the mass of m18 be x

m18/m16= x/(2.66 x 10^-26)

18/16= x/(2.66 x 10^-26)

x= [18 x (2.66 x 10^-26)]/16

=2.99 X 10^-26 kg

When they hit a target after traversing a semicircle the distance between them is the difference of their diameter.(∆d)

∆d=2r18-2r16

Where r18 is the radius of the m18 mass

r16 is the radius of the m16 mass.

∆d=2(r18-r16).

The radius of an object transversing in a magnetic field is given by the below formula.

r = mv/qB

m is the mass of the object.

v is the velocity of the object

q is the charge carried by the object

B magnetic field

∆d=2(r18-r16). Substituting the value for r from the above formula.

∆d=2[(m18-m16)v]/qB

m18-m16=

(2.99-2.66)x10^-26=0.33x 10^-26

qB=1.6x10^-19 x2=3.2 x10^-19

Substituting these values in the ∆d formula we get

∆d=

2x3.7x10^6x0.33x10^-26/3.2x10^-19

=2.442 x 10^-20/3.2x 10^-19

=0.76 x10-1m

Using the mass spectrometer and the given data, we can calculate the mass of oxygen-18, and from there calculate the difference in the radii of the ions' paths, which equals the separation between the paths of oxygen-16 and oxygen-18.

In this scenario, a mass spectrometer is being utilized to differentiate between two isotopes: oxygen-16 and oxygen-18. The differential pathway of these isotopes is determined by their mass-to-charge ratios when exposed to a magnetic field. The radius of the circular path in the magnetic field is given by R=mV/qB. Given that both ions are singly charged and have the same velocity, the ratio of their path radii should also be equal to the ratio of their masses.

The mass of oxygen-16 is given as 2.66×10-26 kg. By using the ratio of the masses (16 to 18), we can calculate the mass of oxygen-18 as (18/16)*2.66×10-26 kg = 2.985×10-26 kg. The difference in radii (i.e., the separation between their paths) would then be the difference in the masses times the radius of oxygen-16 in the field.

To calculate the radius of oxygen-16, we can rearrange R=mV/qB as m = RqB/V. Substituting the given values for the magnetic field (B = 2.00 T), the velocity (V = 3.70 ✕ 106 m/s), and the charge (q = the elementary charge e = 1.60217662 × 10-19 C), and using the value we found for the mass of oxygen-16 we can solve for R.

This gives us the radius of oxygen-16's path, and multiplying this radius by the difference in the masses of the ions (18/16-1) will give us the separation in the paths of the ions.

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Took a test and the answer was that the water vapor had remained the same. (35.0 grams)

Answer:

35 grams

Explanation:

Mass does not change with the state of matter.

If you always keep the same mass you will always keep the same number of moles n, and the same number of molecules of watter.

It may have different volume and pressure, but as long as there is not any loss of matter the mass will remain the same.

The answer is B : F = 1.8 X 10 ∧ -15

Given:

Velocity of the proton: 2.0 × 10∧6 m/sec                                      

Magnetic field strength(B): 5.5 × 10∧-3 tesla

Now it is given that velocity and the magnetic field are at 90 degree.

Also Magnetic force F= qvBsin∅                                                       

where F is the magnetic force                                                                    

q is the charge of the proton  which is equal to  1.602x10∧-19 coloumbs

∅ is the angle between the v and B.                                                          

v is the velocity of the proton                                                                

B is the magnetic field                                                              

Substituting the values  we get

F = 1.602 x 10 ∧-19 × 2.0 × 10∧6 × 5.5 × 10∧-3 Sin 90

F= 17.6 x 10 ∧-16  N                                                                                        

F= 1.76 x 10∧-15  N

Rounding off we get  F = 1.8 X 10 ∧ -15 N

Answer:

PLATO ANSWERS!!!!!!!

1.8 × 10^6-15 newtons

Answer: 6.22 N(the units have been mentioned wrongly in the question)

Given:

mass of the ball(m)=0.42 Kg

acceleration of the ball(a)=14.8m/s^2

F=mxa

Where m is the mass of the ball.

a is the acceleration of the ball.

F is the force applied on the ball.

F=0.42 X 14.8

F= 6.26 N

It's vertical position in the air at time [tex]t[/tex] is

[tex]y=\left(18.2\,\dfrac{\mathrm m}{\mathrm s}\right)t-\dfrac g2t^2[/tex]

where [tex]g=9.80\,\dfrac{\mathrm m}{\mathrm s^2}[/tex] is the acceleration due to gravity. After 1.00 second has passed, its position is

[tex]\left(18.2\,\dfrac{\mathrm m}{\mathrm s}\right)(1.00\,\mathrm s)-\dfrac g2(1.00\,\mathrm s)^2=13.3\,\mathrm m[/tex]

Answer:

The ball is going to reach 13.3 meters after 1 second.

Explanation:

The vertical movement of the ball can be described by the kinematic equations of y component for the position:

[tex]y=yo+vy_{o}t+1/2*ayt^2[/tex]

Where yo is the initial position and depends on where the system of reference is located. For this purpose is useful to consider the origin of the system of reference at the ground level,  thus yo will be 0. The vyo coefficient is the initial vertical velocity and is given as 18.2 m/s. The ay coefficient is the vertical acceleration and due there is only the ball weight acting, the acceleration is taken of -9.8 m/s^2 (acceleration of gravity ). The time t must be expressed in seconds to obtaining the position in meters.

[tex]y=18.2\frac{m}{s}*t+1/2*(-9.8\frac{m}{s^2})*t^2[/tex]

Evaluating the equation for a time of 1 second:

[tex]y=18.2\frac{m}{s}*(1 s)+1/2*(-9.8\frac{m}{s^2})* (1 s)^2[/tex]

[tex]y=18.2 m+ (-4.9 m)[/tex]

[tex]y=13.3 m[/tex]

The table is:

t(s)  vx(m/s)

0     0

10    23

20   46

30   69

a) from the data in the table, we observe that the acceleration is constant (because the rate of change in velocity is the same for each time interval of 10 seconds), so we can choose just one interval and calculate the acceleration as the ratio between the change in velocity and the change in time. Taking the first interval, we find

[tex]a=\frac{\Delta v_x}{\Delta t}=\frac{23 m/s-0}{10s -0}=2.3 m/s^2[/tex]

b) To find the jet's acceleration in g's, we just need to divide the acceleration in m/s^2 by the value of g, the acceleration of gravity (9.81 m/s^2), so we find

[tex]a_g=\frac{a}{g}=\frac{2.3 m/s^2}{9.8 m/s^2}=0.23 g[/tex]

c) the wheels leave the ground when the jet reaches its take-off velocity, which is 82 m/s.

At t=0s, the velocity of the jet is 0. We know that the acceleration is constant (a=2.3 m/s^2), so we can find the time t at which the jet reaches a velocity vf=82 m/s by using the equation

[tex]v_f = v_i +at[/tex]

Re-arranging and substituting numbers, we find

[tex]t=\frac{v_f}{a}=\frac{82 m/s}{2.3 m/s^2}=35.65 s[/tex]

The Airbus's acceleration during takeoff is approximately 2.3 m/s² or 0.23 g. The plane leaves the ground around 35 seconds into takeoff.

To find the acceleration during takeoff, first observe the change in velocity over time. From 0 s to 30 s, the velocity increases from 0 m/s to 69 m/s. Therefore, the acceleration a is (69 m/s - 0 m/s) / (30 s - 0 s) = 2.3 m/s².

To express this acceleration in g's, recall that 1 g is 9.8 m/s², so the acceleration in g's is 2.3 m/s² / 9.8 m/s² = 0.23 g.

Lastly, to find when the wheels leave the ground, observe that this happens when the velocity reaches the takeoff speed. The jetliner reaches 82 m/s between 30 s and 40 s (a simple linear interpolation gives approximately 35 seconds ).

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Answer:

2057N

Explanation:

Mass (M) = 85kg

Acceleration (a) = 34.0m/s²

g = 9.8m/s²

Weight = mass * acceleration

Weight = 85 * 34 = 2890N

Force acting against the astronaut = M*g

F = 833N

Weight of the astronaut = weight of the astronaut inside the rocket (thrust) - force of gravity acting on him

Weight = Ma - Mg = M(a-g)

Weight = 2890 - 833 = 2057N

We can see here that the apparent weight of an 85-kg astronaut aboard this rocket is:  2057N

We can see here that the Mass (M) = 85kg

Then Acceleration (a) = 34.0m/s²

g = 9.8m/s²

Weight = mass × acceleration

Weight = 85 × 34 = 2890N

We can see here that Force acting against the astronaut = M × g

F = 833N

Weight of the astronaut = weight of the astronaut inside the rocket  - force of gravity acting on him

Weight = Ma - Mg = M(a-g)

Weight = 2890 - 833 = 2057N

Thus, weight = 2057N

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mercury themometer and household paint

realisticlly it could be clorhine (i have some right in my garage) jokenly dirty baby dipers

Centripetal acceleration is applied in circular motion. Y is the point on the track that most closely resembles a circular path for the roller coaster.

The path that corresponds to circular path is point Y, at this point, the rider experiences centripetal acceleration.

Centripetal force is radial acceleration on an object moving in a circular path.

[tex]a_c = \frac{v^2}{r}[/tex]

where;

Thus, in the given diagram, the path that corresponds to circular path is point Y, at this point, the rider experiences centripetal acceleration.

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Given:

m(mass of the car)=1200 Kg

u(initial velocity)=25m/s

Time of impact=0.04s

v(final velocity)=0.

Now we know that

v=u +at

Where v is the final velocity

u is the initial velocity

a is the acceleration

t is the time of impact

Substituting these values we get

0=25+ax0.04

-0.04 a =25

a=-625 m/s^2

Now we also know that

F=mxa

Where F is the force

m is the mass of the car

a is the acceleration of the car

F=1200 x 625

F=750000N

The correct answer is:

Radio waves have longer wavelengths and lower frequencies than microwaves

Explanation:

Microwaves have wavelength between 1 mm and 1 meter, while radio waves have wavelength greater than 1 meter, so radio waves have longer wavelengths.

Frequency is inversely proportional to the wavelength, according to the relationship:

[tex]f=\frac{c}{\lambda}[/tex]

where c is the speed of light and [tex]\lambda[/tex] is the wavelength. From this equation, we immediately understand that the longer the wavelength, the lower the frequency, and viceversa. Therefore, since radio waves have longer wavelengths, they have lower frequencies than microwaves.

Answer:

Radio waves have longer wavelengths and lower frequencies than microwaves