An eraser rests on a clipboard that is tilted at an angle
of 23° with the ground. The eraser is not sliding down
the clipboard. What is the minimum coefficient of
static friction, needed for this to be the case?
0.26
O 042
O Not enough information to tell
O 0.16

Answer:

The answer is c

Explanation:

Answer:45,000

Explanation:

:TIL the average pencil holds enough graphite to draw a line about 35 miles long or to write roughly 45,000 words

Answer:

N' = 1.17*10^21 molecules/m^3

Explanation:

In order to calculate the surface density in Titan's atmosphere, in molecules per cubic meter, you use the following formula for ideal gases:

\(PV=nRT\)     (1)

P: pressure = 1.5 Earth-atmospheres = 1.5 atm

R: ideal gas constant = 8.205 m^3.atm.mol^-1.K^-1

T: temperature in Titan = 94K

n: number of moles

To obtain the number of moles per cubic meter you write the equation (1) as follow:

\(N=\frac{n}{V}=\frac{P}{RT}\)      (2)

N: moles per cubic meter

You use the Avogadro's number for the number of molecules:

\(N'=NA=\frac{AP}{RT}\)    (3)

A: Avogadro's number = 6.022*109^23 molecules/mol

N': molecules per cubic meter

You replace the values of all parameters in the equation (3):

\(N'=\frac{(6.022*10^{23}molecules/mol)(1.5atm)}{(8.205m^3.atm.K^{-1}mol^{-1})(94K)}\\\\N'=1.17*10^{21}\frac{molecules}{m^3}\)

The surface density of molecules in Titan is 1.17*10^21 molecules/m^3

Answer:

1.2×1026molecules/m3

Explanation:

given

The ball's gravitational potential energy may be calculated in proportion to the velocity obtained by the ball as it rolls down the ramp.

The following is a model of the ball's GPE;

The height of the ball is related to the square of the velocity attained when rolling down the ramp.h ∝ v²

The gravitational potential energy, GPE, is given as follows;

GPE = m·g·Δh

Where;

m = The mass of the ball

g = The acceleration due to gravity

Δh = The change in elevation of the ball

The gravitational energy of the ball at the ramp's beginning (lowest) point, when h = 0, is 0

When a modest amount of energy is provided to the ball by moving it slowly, it advances up the ramp for a short distance before stopping.

When more energy is provided to the ball, it moves to a higher position on the ramp.

When energy is given to the ball, it is transformed into gravitational potential energy, and the height of the ball reflects the quantity of gravitational potential energy in the ball.

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Our muscles need more oxygen to make energy (in the form of ATP) while we workout.

When the respiratory rate picks up to fulfill this need, more oxygen can enter the body and more carbon dioxide can be exhaled.

Student 3 is breathing more forcefully than usual in this situation because of the high temperature and physical activity.

The respiratory system is the organ system engaged in this process.

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# complete question:

A group of students were playing basketball together during recess. The temperature outside was 30.5 oC (87 oF) and the sun was out. The students ran, shot baskets, and dribbled the ball for 30 minutes. When they finished their game some of the students made the following comments:

Student 1: Wow! I am so hot and sweaty! I need some water to cool down.

Student 2: My cheeks are really red.

Student 3: I am breathing so hard, I can barely catch my breath!

Explain what is happening to the students and how their bodies are trying to maintain homeostasis. Be sure to include any of the organ systems involved with each student.

Answer:

The radius of the circle will be 20

Explanation:

First we will get the time from the given

time =velocity÷acceleration, 8÷20= 0.4s

then we are going to get the distance (circumference)

d=velocity ×time, 8×0.4=3.2

since that the circumference =2/pi (r)²

2×22÷7×r²=3.2 , 3.2 ÷44÷7=0.509 root 0.509

radius=0.71

Answer:

Theres no given?

Explanation:

Well, whatever.

I observed the shift of their sunset time.

Examples like:

January to June = their sunset time increased while

July to December = their sunset time decreased

1.The valence electrons are responsible for the chemical properties of elements, including their reactivity and ability to form chemical bonds. 2. table is shown below. 3. The data table shows that elements with one valence electron have very high reactivity, which supports the claim that valence electrons play a critical role in chemical reactions.

1.Valence electrons, which are the electrons situated in the outermost orbital of an atom, participate in chemical reactions and bonding. The valence electrons are responsible for the chemical properties of elements, including their reactivity and ability to form chemical bonds. In chemical reactions, valence electrons are either shared between atoms (covalent bonding) or transferred from one atom to another (ionic bonding) to form stable compounds. The number of valence electrons in an atom determines its valency, which is the number of electrons that an atom can share or lose during a chemical reaction.

2.Here is a data table that shows the reactivity of Group 1 elements, which have only one valence electron:

Element          Reactivity

Lithium             High

Sodium            Very high

Potassium Extremely high

This data table shows evidence of how valence electrons play a role in chemical reactions. The Group 1 elements have only one valence electron, which is far from the nucleus and easily lost to form a cation. This electron is also easily attracted to neighboring atoms with high electronegativity, and thus, Group 1 metals are highly reactive. As you move down Group 1, the reactivity increases due to the lower ionization energy required to remove the outermost electron.

3.The data table shows that elements with one valence electron have very high reactivity, which supports the claim that valence electrons play a critical role in chemical reactions. Since these elements have only one valence electron, their valency is one, and they readily lose this electron to form a positive ion, which combines with other negatively charged atoms to form a chemical bond. The reactivity increases down the Group 1 elements because the ionization energy required to remove the outermost electron decreases. This change illustrates the significance of the valence electrons in the chemical properties of the elements. Thus, the data table supports the assertion that the valence electrons play a vital role in chemical reactions and bonding.

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Luka Doncic will score the 3 points if he throws a ball from a 3-point line distance (6.75 m) and if the basket is at height of 3.05 m.

Resolving u into its vertical and horizontal components

ux = u cos θ

ux = 8.3 cos 45°

ux = 5.9 m / s

uy = u sin θ

uy = 8.3 sin 45°

uy = 5.9 m / s

H = 3.05 - 2.8

H = 0.25 m

T = uy + √ uy² - 2 g H / g

T = 5.9 + √ 5.9² - ( 2 * 9.8 * 0.25 ) / 9.8

T = 5.9 + √ 34.81 - 4.9 / 9.8

T = 5.9 + 5.47 / 9.8

T = 11.37 / 9.8

T = 1.16 s

R = ux T

R = 5.9 * 1.16

R = 6.8 m

Distance of three point line from the basket = 6.75 m = 6.8 m = R

Therefore, Luka Doncic will score the 3 points

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The answer is:

The formula used to find an object's acceleration is a = Δv / Δt.

Acceleration is the rate of change of the velocity of an object with respect to time. It is a vector quantity.

The equation for acceleration is  

a = Δv / Δt

where a is acceleration,

Δv is the change in velocity,

Δt is the amount of time it took for that change to occur.

The unit is \(\frac{m}{s^{2} }\).

There are two ways by which an object can accelerate. One is to change the speed and other one is to change the direction. Even you can change both at same time.

If not changing any of them then object can not accelerate.

Some of examples of acceleration are

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Answer:

Image distance = 44.8cm, Image height = 16.5cm, Magnification = 0.42

The image is a virtual and upright image.

Explanation:

The nature of image formed by an object placed in front of a convex mirror is always diminished, virtual and erect.

The focal length f and the image distance are always NEGATIVE beacause the image is formed behind the mirror.

Given f = -33.0cm, v = -19.0cm

using thr mirror formula to get the object distance u, we have;

\(\frac{1}{f}=\frac{1}{u} + \frac{1}{v}\\ \frac{1}{u}=\frac{1}{f} - \frac{1}{v}\\\frac{1}{u}=\frac{1}{-33} - \frac{1}{-19}\\\frac{1}{u}=\frac{-19+33}{627} \\\frac{1}{u}=\frac{14}{627} \\u=\frac{627}{14} \\u = 44.8cm\)

To calculate the image height, we will use the magnification formula

M = \(\frac{image\ height}{object\ height}=\frac{image\ distance}{object\ distance} \\\)

M = \(\frac{Hi}{HI}=\frac{v}{u}\)

Given Hi = 7.0cm

v = 19.0cm

u = 44.8cm

HI = 7*44.8/19

HI = 16.5cm

The object height is 16.5cm

Magnification = v/u = 19.0/44.8 = 0.42

SInce the image is formed behind the mirror, the image is a VIRTUAL and UPRIGHT image

Answer:

Explanation:

Mica dielectric constant (k) is approximately 3. The distance between the plates is 5 mm = \(5\times10^{-3}\) m = d and the area of each plate is\(A = 0.1\times 0.2=2\times 10^{-2} m^{2}\). So, the capacitance of that capacitor is:

\(C=\frac{\epsilon_{0}kA}{d}=\frac{(8.85\times10^{-12})(3)(2\times10^{-2}}{5\times10^{-3}}=10.62\times10^{-11} =1.062\times10^{-10} F\)

or approximately 0.106 nF.

Answer:

3201.304 J

Explanation:

Use ideal gas equation to initial stage:

PV=nRT

P * 0.034 = 1.8 * 8.314 * 250

P = 110038.2353 Pa

Use ideal gas equation to final stage:

PV=nRT

P * 0.08 = 1.8 * 8.314 * 250

P = 46766.25 Pa

Process is isothermal (constant temperature )

Therefore,

Work= C ln (V2/V1)

(P1V1=P2V2=C)

(Above equation is taken by integration of P.dv)

Work = P1V1 ln (V2/V1) = P2V2 ln (V2/V1)

By substituting above data to the equation:

Work = (110038.2353 * 0.034) * ln (0.08/0.034)

Work = 3201.304 J

Answer:

Explanation:

To find the current flowing in the circuit, we can use Ohm's Law and Kirchhoff's circuit laws.

Ohm's Law states that the current (I) flowing through a circuit is equal to the voltage (V) divided by the resistance (R):

I = V / R

In this case, the voltage (V) is the electromotive force (EMF) of the current source, which is 14 V. The total resistance (R) in the circuit is the sum of the internal resistance (r) and the resistances of the two resistors (R1 and R2):

R = r + R1 + R2

Given that the internal resistance (r) is 1Ω and each resistor (R1 and R2) has a resistance of 3Ω, we can substitute these values into the equation:

R = 1Ω + 3Ω + 3Ω = 7Ω

Now we can calculate the current (I):

I = V / R = 14 V / 7Ω = 2 A

Therefore, the current flowing in the circuit is 2 Amperes.

Answer:

a) 8 secs I think

b)2m/s^2

Answer:

d. convention

Explanation:

hope this helped

The ranking of the boy's location in the ferris wheel ridding motion above comparing his felt weight from the highest to the lowest is 1, 2 and 4 tie, 3.

The correct answer choice is option c.

The correct image is attached.

In motion above by the boy, the boy feels he weighs the greatest at location 3 among all the location simply because there is a force known as centripetal force which technically acts upward at that point which makes more weight be felt among all.

However, at the locations 2 and 4, the force actually was acting side ways, which would still not affect the weight from 3 in the circular movement. And at location, the weight felt feels the lowest among all.

In conclusion, the locations of the boy on a ferris wheel ridding from the greatest is highest to the lowest is 1, 2 and 4 tie, 3.

Complete question:

The diagram above represents a Ferris wheel-a circular ride that rotates in a vertical circle with seats where people sit. The numbers correspond to a seat in four difference places as the Ferris wheel rotates.

Imagine a boy sitting in this seat riding the ride with the Ferris wheel rotating in the direction shown (at constant speed). Rank the locations according to how much the boy would feel like he weighs,greatest first.

a. 1, 2, 3, 4

b. 1 and 3 tie, 2 and 4 tie.

c. 1, 2 and 4 tie, 3

d. 4, 3, 2, 1.

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Answer:62

Explanation:

The weight of the sled is 77 N. The force by the hill on the sled is equal to its weight that is 77 N. Then the tension force exerted by the rope on the sled is being 77N sin θ, where θ be the angle of inclination.

Force is an external agent acting on an object to change its motion or to deform it. There are various kinds of force like magnetic force, tension force, frictional force, gravitational force etc.

The weight that an object experience on earth is due to the gravitational force. The force that is exerted by a rope on an object is tension force since it is pulling from a side.

The normal force by the hill on the sled is equal to its weight that is 77 N. The tension force on the sled by the rope is dependent on the angle of inclination θ. If know the angle we can find T by the equation:

T = 77 sin θ.

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Answer:

1/2

Explanation:

Given

c=distance

a= length

e= c/a

3/6

e= 1/2 or 0.5

The effort distance of a lever should be increased to lift a heavier load because it provides a mechanical advantage, allowing for easier lifting of the load.

The effort distance of a lever should be increased to lift a heavier load because it allows for a mechanical advantage that compensates for the increased weight.

In a lever system, the effort distance is the distance between the point of application of the input force (effort) and the fulcrum, while the load distance is the distance between the point of application of the output force (load) and the fulcrum. The mechanical advantage of a lever is determined by the ratio of the load distance to the effort distance.

By increasing the effort distance, the mechanical advantage of the lever system is increased. This means that for the same input force (effort), a greater output force (load) can be achieved. When dealing with a heavier load, a higher mechanical advantage is required to overcome the increased resistance.

By increasing the effort distance, the lever system can effectively multiply the applied force, making it easier to lift the heavier load. This allows for the redistribution of force and facilitates the efficient use of human effort in various applications, such as in construction, engineering, and even everyday tools like scissors and pliers.

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Answer:

True

Explanation:

Different colors of light travel at greatly different speeds even in the same medium. This is what causes the dispersion of light through a prism.

Answer:Its false just took the test.

Explanation:

Answer:

\(1.125\; {\rm m}\).

Explanation:

The torque that Sarah and Sally exert on this seesaw need to be equal in magnitude.

The weight of Sarah is \(m(\text{Sarah})\, g\), where \(m(\text{Sarah}) = 40\; {\rm kg}\).

The weight of Sally is \(m(\text{Sally})\, g\), where \(m(\text{Sally}) = 30\; {\rm kg}\).

Assuming that the seesaw is level. The force that Sarah exerts on the seesaw will be perpendicular to the seesaw. The resultant torque will be of magnitude \(\tau(\text{Sarah}) = m(\text{Sally})\, g\, l(\text{Sarah})\), where \(l(\text{Sarah})\) is the distance between Sarah and the center of the seesaw (the fulcrum).

Similarly, the torque from Sally will have a magnitude of \(\tau(\text{Sally}) = m(\text{Sally})\, g\, l(\text{Sally})\), where \(l(\text{Sally}) = (3.0 / 2)\; {\rm m} = 1.5\; {\rm m}\) is the distance between Sally and the center of the seesaw.

The magnitude of the two torques should be equal. Thus:

\(m(\text{Sarah})\, g\, l(\text{Sarah}) = m(\text{Sally})\, g\, l(\text{Sally})\).

Rewrite this equation and solve for \(l(\text{Sarah})\):

\(\begin{aligned}l(\text{Sarah}) &= \frac{m(\text{Sally})\, g\, l(\text{Sally})}{m(\text{Sarah})\, g} \\ &= \frac{m(\text{Sally})}{m(\text{Sarah})}\, l(\text{Sally})\\ &= \frac{30\; {\rm kg}}{40\; {\rm kg}}\, (1.5\; {\rm m}) \\ &= 1.125\; {\rm m}\end{aligned}\).

A normal force is a force applied perpendicular to a surface on an object in contact with it. The weight is the gravitational force imposed on an object, and it is equal to the mass multiplied by the acceleration due to gravity.

When an object is put on a scale at rest on a level surface, the normal force equals the weight. In this instance, the normal force acting upwards from the scale on the object is equal to the weight acting downwards.

Here are two instances of normal forces that are not equal to weight:

When a person stands on an inclined plane or ramp, the normal force applied by the plane is less than the person's weight, because some of the weight is resolved parallel to the plane, causing the person to slide down if enough friction exists.

The normal force exerted by the air or other medium on a person in free fall is zero, while their weight due to gravity stays constant.

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Answer:

Assignment: Calculating Speed Investigation

Data Analysis:

Note: Please submit your data table with this assignment.

1. Write your original hypothesis here.

2. Calculate the average time for vehicle 1 from the information in your data table. Show all work.

3. Calculate the average time for vehicle 2 from the information in your data table. Show all work.

4. Calculate the average speed for vehicle 1 from the information in your data table. Show all work, including the formula used.

5. Calculate the average speed for vehicle 2 from the information in your data table. Show all work, including the formula used.

Conclusion:

Think about this information and then write a conclusion based on the data of this experiment. Don’t forget to connect the conclusion to the original hypothesis.

Were you able to support your hypothesis or not? Be sure to base your answer on the data you collected. Consider whether your conclusion is the only explanation for the data you collected or if there could be alternate explanations. Don’t forget to mention any scientific laws or theories you have studied that would apply to this experiment.

Follow-up Questions:

1. If your experiment did not seem to match the expected results, what did you learn from the experience?

2. Instantaneous speed is the rate of motion of an object at a particular moment in time. What change(s) to the experimental procedure would be necessary if you wanted to gather data on instantaneous speed?

and as for the data can you please make your own

Explanation:

Assignment: Calculating Speed Investigation

Data Analysis:

Note: Please submit your data table with this assignment.

1. Write your original hypothesis here.

2. Calculate the average time for vehicle 1 from the information in your data table. Show all work.

3. Calculate the average time for vehicle 2 from the information in your data table. Show all work.

4. Calculate the average speed for vehicle 1 from the information in your data table. Show all work, including the formula used.

5. Calculate the average speed for vehicle 2 from the information in your data table. Show all work, including the formula used.

Conclusion:

Think about this information and then write a conclusion based on the data of this experiment. Don’t forget to connect the conclusion to the original hypothesis.

Were you able to support your hypothesis or not? Be sure to base your answer on the data you collected. Consider whether your conclusion is the only explanation for the data you collected or if there could be alternate explanations. Don’t forget to mention any scientific laws or theories you have studied that would apply to this experiment.

Follow-up Questions:

1. If your experiment did not seem to match the expected results, what did you learn from the experience?

2. Instantaneous speed is the rate of motion of an object at a particular moment in time. What change(s) to the experimental procedure would be necessary if you wanted to gather data on instantaneous speed?

and as for the data can you please make your ownWhich sentence uses a superlative adjective correctly?

Anthony is running more quickly than anyone else on the field.

Shalon is a very talented pianist.

That is the best chocolate cake I have ever tasted.

Ani is the better gymnast of the two.

Which statement best compares and contrasts the purpose of "PROSERPINE" to that of "How Old Man Winter Was Driven Back"?

The Greek myth explains the creation of the earth, while the Iroquois myth also explains why there is evil in the world.

The Greek myth explains the creation of the earth, while the Iroquois myth also explains the creation of the moon.

The Greek myth explains the changing of the seasons as well as the existence of the underworld, while the Iroquois myth also explains the changing of the seasons.

The Greek myth explains the creation of the moon, while the Iroquois myth explains the creation of the sun.

Read the passages:

from "How Old Man Winter Was Driven Back"

"I, too, am powerful, and I am young! I do not fear you. When I touch the earth, it grows soft and warm. Every living thing stirs in its sleep,—birds and bees, flowers and trees, animals and men. When I speak, the sleeping sun awakes. See! Already he begins to send down his arrows. Hasten! that they may not find you, on the trail to the North Sky."

from "How the World Was Made"

Even some of the trees went to sleep. Only the cedar, the pine, the spruce, the holly, and the laurel were awake all seven nights. Therefore they are always green. They are also sacred trees. But to the other trees it was said, “Because you did not stay awake, therefore you shall lose your hair every winter.”

Which best uses textual evidence to compare and contrast these two myths?

Both myths show the change in seasons as a violent battle.

In "How Old Man Winter Was Driven Back," the change in

ωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωZ?

Answer: 11.8 m/s

Explanation: Multiply the height, 1.20 m by 9.8. This is because on earth free falling objects have a speed of 9.8 m/s^2 downward.

Answer:

l think the correct answer is 1.GAA GUC

The value of the spring constant is k = 2.44 N/m

We know that work done by a spring is given by :W =  \(\frac{1}{2} kx^{2}\)

Where,

W = Work done = 0.15 J

x = stretched distance = 0.35 m

k = spring constant

Putting these values in above equation we get, k = 2.44 N/m

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The amount of force required is (V) is v(t) = at.

What is velocity?

The speed of something in a given direction. Velocity is the directional speed of to an object in motion as an indication of its rate of the  change in position as in observed from a particular to frame of reference and it's as measured by a particularly standard of time.

Sol-As per the newton's first law of motion.

Vt= vo+at

Here,

velocity at time t is v(t).

Initial velocity is vo.

Acceleration is a and the time is t.

The initial velocity is zero. Put the 0 for vo in above equation.

v(t) = 0+at

v(t)= at

Thus, the acceleration of a falling body (a), the time it takes to fall (t), and its instantaneous velocity when it hits the ground.

(V) is v(t) = at.

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Answer:

i think..its fraction that its have multiple fractions on it..if you minus the 397 000-355 it should be 381+ so i say if you get the 5 multiply it by 9!! so you will get it!

Explanation:

HOPE IT HELPS!!