what is the angular momentum vector of the 600 g rotating bar in (figure 1)?

Answer:

The final velocity is 5.24 m/s

The initial speed is 65.5 m/s

Explanation:

Horizontal Motion

When an object is launched horizontally with an initial speed v from a height h, it describes a curved path ruled exclusively by gravity until it eventually hits the ground.

The horizontal component of the velocity is always constant because no acceleration acts in that direction, thus:

\(v_x=v_o\)

The vertical component of the velocity changes in time t because gravity makes the object fall at increasing speed given by:

\(v_y=g.t\)

The maximum horizontal distance traveled by the object can be calculated as follows:

\(\displaystyle d=v\cdot\sqrt{\frac {2h}{g}}\)

Another useful formula allows us to calculate the distance traveled by the object in terms of time t:

\(\displaystyle y=\frac{g.t^2}{2}\)

a.

The time taken for the arrow to reach the ground can be calculated by solving the above equation for t:

\(\displaystyle t=\sqrt{\frac{2y}{g}}\)

Since y=1.40 m:

\(\displaystyle t=\sqrt{0.2857}\)

t = 0.53 s

The final vertical speed is:

\(v_y=9.8.(0.53)=5.24\ m/s\)

The final velocity is 5.24 m/s

b)

The initial speed can be calculated by solving the following equation for v:

\(\displaystyle d=v\cdot\sqrt{\frac {2h}{g}}\)

\(\displaystyle v=d\cdot\sqrt{\frac {g}{2h}}\)

\(\displaystyle v=35\cdot\sqrt{\frac {9.8}{2(1.40)}}\)

v = 65.5 m/s

The initial speed is 65.5 m/s

The mechanical energy at top =Mechanical energy at bottom

\(\\ \tt\longmapsto M_{initial}=M_{Final}\)

\(\\ \tt\longmapsto KE=M_{initial}\)

\(\\ \tt\longmapsto KE=P.E_{(Top)}+K.E_{(Top)}\)

\(\\ \tt\longmapsto K.E=mgh+\dfrac{1}{2}mv^2\)

\(\\ \tt\longmapsto K.E=m\left(gh+\dfrac{v^2}{2}\right)\)

\(\\ \tt\longmapsto K.E=54\left((10)(51)+\dfrac{2.6^2}{2}\right)\)

\(\\ \tt\longmapsto K.E=54\left(510+\dfrac{6.76}{2}\right)\)

\(\\ \tt\longmapsto K .E=54(510+3.38)\)

\(\\ \tt\longmapsto K.E=54(513.38)\)

\(\\ \tt\longmapsto K.E=27722.52J\)

\(\\ \tt\longmapsto K.E=27.7KJ\)

The magnitude of the electrostatic force is \(1.8 * 10^-^1\) N, which is equivalent to 0.18 N.

Option C is correct.

The electrostatic force is described as an attractive as well as repulsive force caused by the electric charge particles.

Electrostatic force  F_= k * |q1 * q2| / r²

F_ =  electrostatic force

k =  electrostatic constant

q1 = \(+3.0 * 10^-^5 C,\)

and q2 = \(+6.0 * 10^-^6 C\) (magnitudes of the charges)

r =  distance between the charges = 0.30 m

F_ = (\(9 * 10^9\)) * |(\(+3.0 * 10^-^5 C\)) * (\(+6.0 * 10^-^6 C\))| / (0.30 m)²

F_ =\(1.8 * 10^-^1 N\)

In conclusion, the magnitude of the electrostatic force is \(1.8 * 10^-^1\) N.

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The correct order is ethanol, methanol, propanol, butanol.

This is because the boiling points of these alcohols increase in the order listed, with ethanol having the lowest boiling point and butanol having the highest.

During distillation, the mixture of alcohols is heated until the first component, in this case ethanol, reaches its boiling point and evaporates.

The vapor is then condensed back into a liquid and collected, and the process continues until all of the components have been separated based on their boiling points.

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The total displacement of Joe from the starting point is 5 blocks to the west.

Displacement of a body or a person is the total distance travelled by the person in a specified direction.

Displacement is a vector quantity. Thus, in order to determine the displacement of a body, the total distances travelled are summed by vector addition.

The displacement of Joe is obtained by vector addition as follows:

Assuming the starting point is X

Distance travelled to the South = 5 blocks

Distance travelled to the West = 5 blocks

Distance travelled to the North = 5 blocks

The displacement from the starting point is 5 blocks to the west.

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Increasing the size of a sea in a computer model of a weather system is likely to affect temperatures along the coast of that sea. In general, larger bodies of water can have a moderating effect on temperatures, leading to more stable and milder temperatures compared to areas further away from the water. This happens because water has a higher specific heat capacity than land, which means it takes longer to heat up and cool down. As a result, coastal areas near a large sea may experience less extreme temperature fluctuations and a more moderate overall climate compared to areas further inland.

When a body is thrown downwards, it falls freely under gravity.

The question is incomplete as the values are missing but I will try to help you the much I can. We must note that the acceleration of a body refers to the rate at which its velocity changes per unit time.

When an object is thrown down from a height. It gains speed due to acceleration due to gravity which acts on the body as it falls freely.

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Energy is transferred along the food chain from the producers to the decomposers.

The term food chain has to do with the process by which energy is passed from one organism to another along the in the ecosystem. Let us recall that the ecosystem is a unit that is composed of living and non living parts and is able to sustain itself.

According to the principle of second law of thermodynamics, energy transfers is not 100% efficient. Thus as energy is transferred along the food chain, only 10% of the energy that was acquired from the pervious trophic level is passed on to the succeeding trophic level.

This is because of the fact that the remainder of the energy is utilized in the metabolic activities of organisms. We can rightly call the food chain a food cycle because as we can see from the image, energy is obtained from the sun and passed along the food chain and returned to the producers by the activities of the decomposers.

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Answer:

27.5Ω

Explanation:

Given parameters:

Potential difference in the circuit = 11V

Current in the circuit  = 0.4A

Unknown:

Resistance in the circuit = ?

Solution:

According to ohm's law;

   V = IR

V is the voltage

I is the current

R is the resistance

  Since the unknown is R, we find it;

        11  = 0.4 x R

         R  = \(\frac{11}{0.4}\)   = 27.5Ω

The resistance of the variable resistor will be 27.5 ohms

According to Ohm's law which states that the current flowing through a metallic conductor is directly proportional to the potential difference across its ends.

Mathematically, V = IR

V is the potential difference

I is the current

R is the resistance

Given the following parameters

V = 11V

I = 0.4A

Get the resistance of the variable resistor  

R = V/I

R = 11/0.4

R = 27.5 ohms

Hence the resistance of the variable resistor will be 27.5 ohms

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Answer:

216.32kN

Explanation:

Force can be expressed according to the formula;

Force = mass ×acceleration

Given

Mass = 1250kg

Velocity = 4.16m/s

Distance = 0.05m

We can get the acceleration first using the equation of motion

v² = u²+2as

4.16² = 0²+2a(0.05)

17.3056 = 0.1a

a = 17.3056/0.1

a = 173.056m/s²

Get the force required

Force = 1250×173.056

Force = 216,320N

Force = 216.32kN

Hence the force constant of the material is 216.32kN

Write the data down:

i = 2.5 A

V = 120 V

t = 1.2 h

First we must calculate electric power of the computer:

P = i x V

P = 2.5 x 120

P = 300 W

Now transform the time in minutes and then in seconds:

1.2 h = 60 min x 1.2 h = 72 minutes

72 minutes x 60 s = 4,320 s

So the energy cost will be:

E = P x t

E = 300 x (4,320)

E = 1,296,000 J

or if we write using scientific notation we get:

Answer:

t = 1.22 s

Explanation:

Given that,

The initial upward velocity component of a football = 12 m/s

The horizontal velocity component is 20 m/s

We need to find the time required for the football to reach the highest point of the trajectory. Let the time is t.

Using first equation of motion to solve it such that,

\(v=u+at\)

u is initial velocity

v is final velocity

a = -g

so,

\(t=\dfrac{u}{g}\\\\t=\dfrac{12}{9.8}\\\\t=1.22\ s\)

So, the required time taken by the football to reach the highest point is 1.22 seconds.

Another name for the geometric optics theory of light is ray optics.

The geometric optics theory of light, also known as ray optics, is a simplified model of how light behaves. According to this theory, light travels in straight lines, or rays, and interacts with surfaces through reflection, refraction, absorption, and transmission. This theory is based on the assumption that the wavelength of light is much smaller than the size of the objects and structures it interacts with. Therefore, the wave nature of light is not considered in this theory.

Geometric optics is used in many practical applications, such as in the design of lenses, mirrors, and other optical systems. It provides a useful tool for predicting the behavior of light in simple optical systems, such as those used in cameras and telescopes. However, it has limitations and cannot explain some phenomena, such as interference and diffraction, which require the wave nature of light to be taken into account. For these situations, a different theory called wave optics or physical optics is used.

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Answer: A. they have irrational shame because of it

Explanation:

Answer:

B

Explanation:

remember that you are looking for the value of the graph

to take into account or value a lot: prize, estimate to value your opinion. 2nd: estimate or assign the monetary value of: appraise a necklace. b: qualify or scale in utility, importance or general value: evaluate. value.

I can help you with that. To find the dimensions of volume, we need to express the answer in terms of length (l), mass (m), and time (t). The dimensions of volume can be expressed as [l^3], where the exponent 3 represents the power of length.

Volume is a measure of the amount of space occupied by an object. It is derived from multiplying three lengths together. Since each length has dimensions [l], when we multiply them, we get [l^3]. This means that volume is measured in cubic units, such as cubic meters (m^3) or cubic centimeters (cm^3).

To summarize, the dimensions of volume are expressed as [l^3], where the exponent 3 represents the power of length. Volume is a measure of the amount of space occupied by an object. It is derived from multiplying three lengths together. Since each length has dimensions [l], when we multiply them, we get [l^3]. This means that volume is measured in cubic units, such as cubic meters (m^3) or cubic centimeters (cm^3).

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Answer:

2+2 divided by 2 to the power of the 4 = 81

Explanation:

good luck

Answer:

Explanation: The Earth's surface is constantly changing through forces in nature. The daily processes of precipitation, wind and land movement result in changes to landforms over a long period of time. Driving forces include erosion, volcanoes and earthquakes. People also contribute to changes in the appearance of land.

a) The gravitational force is 1.7 * 10^4 N.

b) The acceleration due to gravity is 277 m/s^2.

We know that the gravitational force is the force of attraction that acts in the universe between any two masses that are close to each other. We can see that we have the following information;

Mass of the sun =  2 x 10^30 kg

Mass of the person = 60 kg

Radius of the sun = 695,700 km or 695,700000 m

Force of gravity = Gm1m2/r^2

G = gravitational constant

m1 = mass  of the sun

m2 = mass of the person

r = radius of the sun

Hence;

F = 6.67 x 10^-11 * 2 x 10^30  * 60/( 695,700000)^2

F =  8 * 10^21 /4.8 * 10^17

F = 1.7 * 10^4 N

The acceleration due to gravity is gotten from;

g = Gm/r^2

g = 6.67 x 10^-11 * 2 x 10^30/( 695,700000)^2

g = 1.33 * 10^20/4.8 * 10^17

g = 277 m/s^2

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Answer:

1. d

2. g

3. b

4. h

5. i

6. e

7. c

8. a

9. j

10. f

Circuits can be closed or open; if closed, by a switch perhaps, electricity can flow, and if open it cannot. When components are wired in series, they are one after the other, which is often inefficient. When components are wired in parallel, there are two separate tracks, two paths for the current to flow through. Conductors like electricity, insulators do not.

Answer:

6970 N

Explanation:

To calculate the average force exerted on the ball, we can use the impulse-momentum theorem, which states that the impulse on an object is equal to its change in momentum. In equation form:

Impulse = Δp

where Impulse is the force applied over a given time, and Δp is the change in momentum of the object.

We can calculate the momentum of the ball before the hit as:

p1 = m * v1

where m is the mass of the ball and v1 is its initial velocity (which we assume to be zero). Substituting the given values, we get:

p1 = (0.85 kg) * 0 m/s = 0 kg m/s

The momentum of the ball after the hit is:

p2 = m * v2

where v2 is the final velocity of the ball (82 m/s). Substituting the given values, we get:

p2 = (0.85 kg) * 82 m/s = 69.7 kg m/s

The change in momentum (Δp) is therefore:

Δp = p2 - p1 = 69.7 kg m/s - 0 kg m/s = 69.7 kg m/s

The impulse on the ball is equal to the change in momentum, so we have:

Impulse = Δp = 69.7 kg m/s

Finally, we can calculate the average force exerted on the ball using the formula:

Impulse = Force * time

Substituting the given values, we get:

69.7 kg m/s = Force * 0.01 s

Solving for Force, we get:

Force = 6970 N

Therefore, the average force exerted on the ball by the bat is 6970 Newtons.

To determine the map distances between E and F, E and G, and F and G, we can use the formula:
Map distance = (Number of recombinant progeny / Total number of progeny) * 100

Map distance between E and F:
Number of recombinant progeny (eFG + Efg + eFg + EFG) = 298 + 302 + 99 + 91 = 790
Total number of progeny = Sum of all progeny = 298 + 302 + 99 + 91 + 92 + 88 + 19 + 16 = 1005
Map distance between E and F = (790 / 1005) * 100 = 78.6 mn (rounded to the nearest whole number)
Map distance between E and G:
Number of recombinant progeny (eFG + EFg + EFG + efG) = 298 + 92 + 19 + 88 = 497
Total number of progeny = 1005 (same as before)
Map distance between E and G = (497 / 1005) * 100 = 49.35 mn (rounded to the nearest whole number)
Map distance between F and G:
Number of recombinant progeny (EFG + efG + EFG + efg) = 91 + 88 + 19 + 16 = 214
Total number of progeny = 1005 (same as before)
Map distance between F and G = (214 / 1005) * 100 = 21.29 mn (rounded to the nearest whole number)
Interference Coefficient:
Interference coefficient is not provided in the given data.

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Answer:

Below

Explanation:

CO2 buildup during exercise stimulates respiration

answer: C

Explanation:

move from one atom to another, the atom that loses an electron becomes positively charged and an atom that gains electrons becomes negatively charged

Answer:

If they put their hands near their neck, if they're not breathing properly, if they aren't coughing.

Explanation:

Answer:

if they are struggling to breathe, attempting to cough (like coughing something up) or asking for help whilst holding their stomach, neck

\(\\ \sf\Rrightarrow Speed=\dfrac{Distance}{Time}\)

\(\\ \sf\Rrightarrow Time=\dfrac{Distance}{Speed}\)

\(\\ \sf\Rrightarrow Time=\dfrac{5000}{300}\)

\(\\ \sf\Rrightarrow Time=16.6min\)

Answer:

7.5m/s

Explanation:

Law of conservation of momentum: momentum in a system before collision equals to that after collision/

5kg*3m/s=2kg*v

15kgm/s=2kg*v

v=7.5m/s

Explanation:

The conductivity of water can be increased by adding any solute that increases the number of ions in solution.

Hope this helps you.. Good luck

The conductivity of water can be incrased by adding to it anything that disolves and ionizes in it.

Examples:

-- sugar

-- coffee

-- tea

-- artificial sweetener  

-- baking soda

-- orange juice

-- corn starch

-- salt