Answer:
6
Explanation:
because the numbers before the decimal point are whole numbers so that would mean the 4 & 0 before the points the ones and tens place. and anything behind a decimal goes in order as usual ones,tens,hundredths, thousandths, ten thousandths, and so on. so that what makes the 6 be in the hundredths place.
How do you find the force of a ping-pong ball rolling down a track?
Answer:
Weight
a) weight's vertical component = Normal upward force
b) weight's horizontal component = Friction force = (mass of ball)(acceleration)
These forces depend upon the track,
1) inclined or horizontal
2) steepness.
Explanation
The force of gravity points straight down, but a ball rolling down a ramp doesn't go straight down, it follows the ramp. Therefore, only the component of the weight which points along the direction of the ball's motion can accelerate the ball.
weight's horizontal component = Friction force = (mass of ball)(acceleration)
The other component pushes the ball into the ramp, and the ramp pushes back.
If the ramp is horizontal, then the ball does not accelerate, as gravity pushes the ball into the ramp and not along the surface of the ramp. Hope this helps. Can u give me brainliest
Explanation:
Help please I am stuck
Answer:
ADCACExplanation:
von mises and tresca criteria give different yield stress for
The von Mises and Tresca criteria are two different methods used to determine the yield stress of a material. The von Mises criterion considers the distortion energy, while the Tresca criterion considers the maximum shear stress. The von Mises criterion is often used for ductile materials, while the Tresca criterion is often used for brittle materials.
The von Mises and Tresca criteria are two different methods used to determine the yield stress of a material. The yield stress is the point at which a material starts to deform plastically, meaning it undergoes permanent deformation even after the applied stress is removed.
The von Mises criterion, also known as the distortion energy theory, takes into account the three principal stresses in a material and calculates an equivalent stress value. If this equivalent stress exceeds the yield strength of the material, it is considered to have yielded.
The Tresca criterion, also known as the maximum shear stress theory, only considers the difference between the maximum and minimum principal stresses in a material. If this difference exceeds the yield strength of the material, it is considered to have yielded.
The von Mises criterion is often used for ductile materials, where plastic deformation is significant. It provides a more accurate prediction of yielding in complex stress states. On the other hand, the Tresca criterion is often used for brittle materials, where plastic deformation is minimal. It provides a conservative estimate of yielding.
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He lens of the eye loses its ________ with age, which impairs the ability to focus.
The lens of the eye loses its flexibility with age, which impairs the ability of the eyes to focus. This process is called presbyopia.
Presbyopia happens when the lens of the eye loses its flexibility due to age. The lens of the eye works similar to the lens of a digital camera. The digital camera focuses on objects that are far or near by by adjusting the placement of the lens, by slightly moving it forward or backward, constantly changing its focal length. The human eye does the same, but instead of moving the lens, the lens changes its shape to focus on far or near objects, thereby also changing its focal length. This is also called accommodation.
To focus on far objects, certain muscles around the lens relax, making the lens rounder in shape, while for close objects, the muscles contract, making the lens flatter in shape.
As a person ages, the lens thickens and gradually loses its flexibility, and around the age of 40, the lens is no longer flexible. Therefore, it becomes difficult to focus on close objects. This condition is therefore known as presbyopia.
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How can being near a large body of water affect the climate of a region? PLZ help me!!!
There would be more hurricanes because hurricanes from by water.
More rain because you would get more precipitation.
Higher flooding if a storm comes through.
At which scale factor will the pre-image and image be congruent?
The picture and the pre-image are consistent ONLY when the scale factor is 1.
What is the dilation image pre-scale image's factor?A sort of transformation known as a dilatation enlarges or shrinks a figure (referred to as the preimage) to produce a new figure (called the image). How much larger or smaller the dilation image will be in comparison to the preimage depends on the scale factor, r.
What is the minimum scale factor required for the image to be congruent?The scale factor and the center of dilation are used to determine the dilation transformation. The image stretches if the scaling factor is greater than 1.
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URGENT!! ILL GIVE
BRAINLIEST! AND 100 POINTS
A liquid has a mass of 25 grams (g) and a volume of 10 milliliters (mL). What is the density of the liquid?
A. 4.0 g/ml
B. 0.4 g/ml
C. 2.5 g/ml
D. 250 g/ml
Answer:
C. 2.5 g/ml
Explanation:
Divide mass by volume
Part C
Just like in the diagram, when Earth was primarily liquid, it separated into layers. What prediction can you make about the
densities of Earth's different layers?
When the Earth was primarily liquid, it separated into layers. The density of Earth's different layers may be predicted. For instance, it is assumed that the outermost layer, or crust, is less dense than the inner layers.
The Earth's crust is mostly composed of silicates (such as quartz, feldspar, and mica) and rocks, which are less dense than the mantle, core, or outer core.
The mantle is composed of solid rock, which is denser than the Earth's crust.
The core is the most dense layer, and it is composed of a liquid outer core and a solid inner core.
Most of the Earth's layers are composed of different types of rock and minerals.
The layers were formed from the molten material that cooled and solidified.
The Earth's layers are divided into four groups, or spheres, that represent different levels of density.
The lithosphere is the outermost layer, which includes the crust and upper mantle.
The asthenosphere is the soft layer beneath the lithosphere.
The mantle is a solid layer that surrounds the core.
The core is the Earth's central layer, consisting of a liquid outer core and a solid inner core.
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Calculate the work done by Kevin as he lifts 3 boxes (mass=45 KG) 57 CM high with an acceleration recorded to be 12.3 m/s^2.
PLEASE ANSWER ASAP!!!
I WILL GIVE BRAINLIEST!!!
PLEASE IT SHOULD BE A CORRECT ANSWER WITH AN EXPLANATION ON HOW TO SOLVE IT!!!
what is the movement of electrons along a conductor called
The movement of electrons along a conductor is called an electric current.
When there is a flow of charges or electrons in a particular direction along a conductor, an electric current is said to exist. An electric current is a movement of free electrons through a conductor.
The flow of electrons is driven by a potential difference or voltage between two points, which causes the electrons to move from the point of higher potential to the point of lower potential.
greater the voltage, the greater the current will be. The unit of electric current is the ampere (A).
In conclusion, the movement of electrons along a conductor is called an electric current. The main answer is that it is driven by a potential difference or voltage between two points, which causes the electrons to move from the point of higher potential to the point of lower potential. The unit of electric current is the ampere (A).
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please this is serious
Distance x force equals work done. When this occurs, the amount of work done is measured in joules (J), the amount of force is recorded in newtons (N), and the distance travelled along the force's path is measured in meters (m).
What does work-done-unit mean?The SI unit of labor is called a joule (J).
The following questions have the following answers:
1) In the picture below, F1 acts downward and F2 acts upward.
2) Moments on the LHS equal F1d1 and on the RHS, F2d2.
Moment in LHS= RHS F1d1= F2d2 F1= (20Kg 10)/200 N Consequently, 200 N0.8= F20.95 160= 0.95 F2 = 168.42 N
The net force has a magnitude of 168.42 N and is directed upward.
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a 900 kg car travelling at 12 m/s due east collides with a 600 kg car travelling at 24 m/s due north. as a result of the collision, the two cars lock together and move in what final direction?
Answer: East
Explanation: To find the final direction of the two cars after the collision, you need to calculate their combined momentum before and after the collision. The momentum of an object is equal to its mass multiplied by its velocity.
The momentum of the 900 kg car before the collision is equal to its mass multiplied by its velocity: 900 kg * 12 m/s = 10,800 kg*m/s.
The momentum of the 600 kg car before the collision is equal to its mass multiplied by its velocity: 600 kg * 24 m/s = 14,400 kg*m/s.
The total momentum of the two cars before the collision is the sum of their individual momenta: 10,800 kgm/s + 14,400 kgm/s = 25,200 kg*m/s.
After the collision, the combined mass of the two cars is equal to their individual masses added together: 900 kg + 600 kg = 1,500 kg.
Since the momentum of an object is equal to its mass multiplied by its velocity, we can use the formula for momentum to calculate the velocity of the two cars after the collision:
Velocity = momentum / mass = 25,200 kg*m/s / 1,500 kg = 16.8 m/s
Since the combined momentum of the two cars before the collision was in the direction of the 900 kg car's original velocity (due east), and the velocity of the two cars after the collision is 16.8 m/s due east, the final direction of the two cars after the collision is due east.
You are playing tennis and return a volley. Identify a force pair.
During a tennis volley, the force pair involved is the action-reaction forces.
When playing tennis and returning a volley, the force pair involved is the action and reaction forces. In the process of hitting the ball, the tennis racket exerts a force on the ball, which is the action force.
The ball, in turn, exerts an equal and opposite force on the racket, which is the reaction force.Both the racket and the ball experience the force of impact during the volley.
The force applied by the racket causes the ball to move forward, while the equal and opposite force applied by the ball pushes the racket back.
These two forces are referred to as action-reaction forces or force pairs. A force pair refers to a pair of forces that are equal in magnitude but opposite in direction.
These forces always act on different objects and occur simultaneously. In this scenario, the action force was exerted by the tennis racket while the reaction force was exerted by the ball.
Therefore, during a tennis volley, the force pair involved is the action-reaction forces.
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Katy slows from 6.7 m/s to 2.3 m/s in 2.2 seconds. What is her acceleration?
Katy slows from 6.7 m/s to 2.3 m/s in 2.2 seconds. The acceleration will be 2 \(m/s^{2}\)
initial speed = 6.7 m/s
final speed = 2.3 m/s
time = 2.2 seconds
acceleration = change in speed / time interval
= 2.3 - 6.7 / 2.2
= -2 \(m/s^{2}\)
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how much work is done by the horizontal force shown in the figure on the block when the force pushes the block 5 meters up the frictionless incline?
The work done by the horizontal force on the block is:
Work = Force × cos(θ) × 5 meters
The amount of work done by the horizontal force on the block can be calculated using the formula for work, which is:
Work = Force × Distance
In this case, the force is the horizontal force shown in the figure, and the distance is the distance that the block is pushed up the incline, which is 5 meters.
To calculate the work done by the horizontal force, we need to find the component of the force that is parallel to the incline. This can be done by multiplying the force by the cosine of the angle of the incline.
If the angle of the incline is θ, then the component of the force that is parallel to the incline is:
Force × cos(θ)
Therefore, the work done by the horizontal force on the block is:
Work = Force × cos(θ) × Distance
Work = Force × cos(θ) × 5 meters
Without the values of the force and the angle of the incline, we cannot calculate the exact amount of work done by the horizontal force on the block.
However, the formula above can be used to calculate the work done if the values of the force and the angle of the incline are known.
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consider a frozen lake. if the heat flow through 1.00 m2 of the 33.8 cm thick ice layer is 185 w, what is the outside temperature? the conductivity of ice is 2.40 w/( m · k). type your answer here
The outside temperature of a frozen lake can be calculated if the heat flow through a given area of the ice layer and the conductivity of the ice are known.
The outside temperature of a frozen lake can be determined using the formula for heat flow through a material, which relates the rate of heat transfer to the temperature difference across the material and its thermal conductivity. In this case, we are given the heat flow through a 1.00 m2 area of the ice layer and the thermal conductivity of the ice. We can use this information to calculate the temperature difference across the ice layer and hence the outside temperature.
To calculate the outside temperature, we first need to find the temperature difference across the ice layer. This can be done using the formula for heat flow:
\(Heat\, flow = (Thermal\,conductivity) \times (Area) \times \frac{Temperature \, difference}{Thickness}\)
Rearranging this equation to solve for the temperature difference, we get:
\(Temperature\,\, difference = \frac{(Heat flow \times Thickness)}{Thermal\,\,conductivity \times Area}\)
Substituting the given values, we get:
\(Temperature difference = \frac{(185 W\times 0.338 m)}{2.40 W/(mK) \times 1.00 m^2} = 24.5 K\)
Therefore, the outside temperature is the temperature of the ice plus the temperature difference, which is:
Outside temperature = 0 K + 24.5 K = 24.5 K
Thus, the outside temperature of the frozen lake is approximately -248.7°C.
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An elevator, mass 4750kg, is designed so that the maximum acceleration is 0.50m/s2. What are themaximum and minimum forces the motor exerts on the cable?
The free body diagram of the elevator can be shown as,
According to free body diagram, the net force acting on the elevator is,
\(F_n=T_{\max }-mg\)According to Newton's law,
\(F_n=ma\)Plug in the known expression,
\(\begin{gathered} ma=T_{\max }-mg \\ T_{\max }=ma+mg \\ =m(a+g) \end{gathered}\)Substitute the known values,
\(\begin{gathered} T_{\max }=(4750kg)(0.50m/s^2+9.8m/s^2) \\ =(4750\text{ kg)(}10.3m/s^2)(\frac{1\text{ N}}{1kgm/s^2}) \\ =48925\text{ N} \end{gathered}\)Thus, the maximum force exerted on the cable is 48925 N.
For minimum, tension the net force can be expressed as,
\(F_n=mg-T_{\min }\)Plug in the known expression,
\(\begin{gathered} ma=mg-T_{\min } \\ T_{\min }=mg-ma \\ =m(g-a) \end{gathered}\)Substitute the known values,
\(\begin{gathered} T_{\min }=(4750kg)(9.8m/s^2-0.5m/s^2) \\ =(4750\text{ kg)(}9.3m/s^2)(\frac{1\text{ N}}{1kgm/s^2}) \\ =44175\text{ N} \end{gathered}\)Thus, the minimum force exerted on the cable is 44175 N.
Explain E=mc2 in Short And Easy Definition
It means mass can be converted into energy.
I. E. In a nuclear fission, we start of with a greater mass of our rectant, which then decrease due to mass being converted into the (thermal) energy released, in our reaction. Later, being used to produce electricity, for example.
Hope this helps!
What is the gravitational field value (g) on planet Saturn with a mass of 5.69 X 1026
and an average radius of 6.03 X 107 m?
most electrical appliances are rated in watts. does this rating depend on how long the appliance is on? (when off, it is a zero-watt device.) explain in terms of the definition of power.
No, the wattage rating of an electrical appliance does not depend on how long the appliance is on. The wattage rating of an electrical appliance is a measure of its power, which is defined as the rate at which energy is used or transferred. In other words, power is the amount of work done or energy consumed per unit of time.
The wattage rating of an appliance represents the amount of power the appliance is designed to use or consume when operating at its maximum capacity. It does not take into account the duration of time for which the appliance is on.
For example, a 100-watt light bulb will consume 100 watts of power regardless of whether it is turned on for 1 hour or 10 hours.
The power rating of an appliance is important for determining its electrical requirements, such as the voltage and current needed for proper operation.
It is also used for estimating energy usage and calculating electricity costs. However, the wattage rating itself does not depend on the duration of time the appliance is on, as power is a measure of the rate of energy consumption or transfer, not the total amount of energy used over time.
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Margaret walks to the store using the following path 0. 630 mi west, 0. 370 mi north, 0. 180 mi east. Assume north to be along the +y-axis and west to be along the -x-axis. What is the magnitude of her total displacement?
The magnitude of Margaret's total displacement is approximately 0.5828 miles.
Since Margaret walked 0.370 miles towards the north direction, the y-component of her displacement is 0.370 miles.
Thus:
y-component = 0.370 miles
We can now find the magnitude of the displacement using the Pythagorean theorem.
The magnitude of displacement is given by:d = √(x² + y²)
Where,x is the x-component of the displacement, and y is the y-component of the displacement.
Substituting the values:
x = -0.450 m and y = 0.370 m
d = √((-0.450)²+ (0.370)²)
d = √(0.2025 + 0.1369)
d = √(0.3394)
d = 0.5828
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What is the speed of a wave that has a frequency of 220 Hz and a wavelength
of 0.39 m?
A. 564 m/s
OB. 85.8 m/s
OC. 0.01 m/s
D. 0.002 m/s
Answer:
B 85.8m/s
Explanation:
frequency(Hz) = 220
wavelength(m) = 0.39
formula for Speed of a wave
Speed = Wavelength x Frequency
speed = 0.39 × 220
speed = 85.8m/s
i hope this helped
Answer: B. 85.8 m/s ✅
Explanation: The speed of a wave can be calculated using the equation:
Velocity = Frequency * Wavelength
Given that the frequency of the wave is 220 Hz and the wavelength is 0.39 m, we can plug these values into the equation:
Velocity = 220 Hz * 0.39 m
The speed of the wave is 85.8 m/s or approximately 309 km/h or 192 mi/h ✅
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Consider the following figures. Determine the direction of the current in the current-carrying wire that produces the field indicated in the figure.
Options:
out of the screen
into the screen
toward the left
toward the right
toward the top of the screen
toward the bottom of the screen
The direction of the current in the current-carrying wire that produces the field indicated in the figure is given below.
Conventionally, a positive charge would go in the same direction as an electric current. As a result, the battery's positive terminal receives less current in the external circuit than its negative counterpart. Indeed, electrons would go in the reverse direction across the cables.
According to Fleming's right-hand rule gives which direction the current flows. The right hand is held with thumb, index finger & middle finger mutually perpendicular to each other. The thumb is pointed in direction of motion to magnetic field of conductor relative to magnetic field.
(A) from right hand rule direction of current is towards left.
(B) Out of the Screen.
(C) Lower left to upper right.
According to Fleming's Right Hand Rule, if the thumb, forefinger, and middle finger are arranged in a straight line on the right hand, the thumb will point in the direction of the conductor's motion in relation to the magnetic field, the forefinger will point in the direction of the magnetic field, and the middle finger will point in the direction of the induced current.
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Full Question ;
Consider the following figures. Determine the direction of the current in the current-carrying wire that produces the field indicated in the figure. (a) * * * * * * * * * * * Bin * O out of the screen O into the screen O toward the left toward the right toward the top of the screen toward the bottom of the screen (b) O out of the screen O into the screen O toward the left toward the right O toward the top of the screen toward the bottom of the screen (C) * * * * O out of the screen into the screen lower right to upper left lower left to upper right upper right to lower left upper left to lower right
Which source of energy is used in a nuclear power station to generate electrical energy
Steam is produced when the cooling agent is heated by nuclear fusion. Turbines, or wheels turned by a flowing current, are rotated by the steam. The generators, which are engines that produce power, are driven by the turbines. Above process is followed in a nuclear power station to generate electrical energy.
Electrical energy is the energy that emerges from the kinetic or potential energy of charged particles. It is referred to be energy that has undergone transformation from overall electric potential energy.
Electrical energy can be described as the result of electrons travelling between two points. The movement of charged particles along or through a medium is known as electricity or current (like a wire).
The basic unit of electrical energy is the joule, also referred to as a watt-second. One joule of electrical energy is produced when one amp of current flows through a circuit for one second while a potential difference of one volt is applied across it.
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The half-life of Po-214 is 0.001 seconds. How much of a 10-gram sample is left after 0.003 seconds?
You would be left with 1.25 g.
After 0.001 second, 10 grams decays to 5 grams.
After another 0.001 second, 5 g decays to 2.5 g. (Total time 0.002 s; two half-lives have passed)
After another 0.001 second, 2.5 g decays to 1.25 g. (Total time 0.003 s; 3 half-lives have passed)
Choose the pair of elements that will most likely have the greatest ionic character.
a. K and N
b. K and S
c. N and Br
d. S and Br
Answer:
K and N
Explanation:
Ionic character depends on the electronegativity difference between the bonding elements. The greatest the elctronegativity diffference the greatest the ionic character. The electronegativity difference between K and N is the greatest among the four options as N is one of the most electronegative elements.
example of induction charging
Answer:
If a rubber balloon is charged negatively (perhaps by rubbing it with animal fur) and brought near the spheres, electrons within the two-sphere system will be induced to move away from the balloon. This is simply the principle that like charges repel.
Explanation:
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A swimmer can travel 2.30 m/s in still water. The swimmer heads directly west across a steam whose current is 1.20 m/s n. What is his velocity relative to the ground
Answer:
velocity relative to the ground = 2.54 m/s
Explanation:
given data
still water Vx = 2.30 m/s
across a steam Vy = 1.20 m/s
solution
we get here first velocity relative to the ground is express as
velocity = \(\sqrt{Vx^2+Vy^2}\) ...............1
put here value and we get
velocity = \(\sqrt{2.3^2+1.20^2}\)
velocity = 2.54 m/s
What is cos-^1(0.34)?
A. 19.9
B. 44.2°
C. 70.1°
D. 18.8°
How many molecules are in 5 moles of O2? A. 6.02 × 1024 B. 3.010 × 1024 C. 3.10 × 1024 D. 3.010 × 1023
There are b) 3.010 * 10 ^ 24 molecules in 5 moles of O2
What is mole ?
The mole is the amount of substance of a system which contains as many elementary entities as there are atoms in 0.012 kilograms of carbon 12 .
Number of moles = 5 moles
Number of molecules = ?
Avogadro's number = 6.022 * 10^23
Number of molecules in 5 moles of O2= number of moles * Avogadro's number
= 5 * 6.022 * 10^23
= 30. 10* 10 ^23 = 3.011 * 10 ^ 24 molecules
There are b) 3.010 * 10 ^ 24 molecules in 5 moles of O2
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