What is the tension in the string in (Figure 1) ? The volume of plastic ball is 75 cm3 and the density is 840 kg/m3. Express your answer to two sig fig and include appropriate units.

The pressure of the gas in the deodorant can when it is heated to 900 K is 9 atm.

Gay-Lussac's law states that the pressure exerted by a given quantity of gas varies directly with the absolute temperature of the gas.

It is expressed as;

P₁/T₁ = P₂/T₂

From the data:

We substitute our values into the expression above and solve for final pressure.

P₁/T₁ = P₂/T₂

P₁T₂ = P₂T₁

P₂ = P₁T₂  / T₁

P₂ = ( 3 atm × 900 K ) / 300 K

P₂ = 9.0 atm

Therefore, the final pressure is 9.0 atm.

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Answer:

Choice E.

Amplitude: \(20\; {\rm cm}\).

Frequency: \(2\; {\rm Hz}\).

Explanation:

The amplitude of a simple harmonic motion (SHM) is the maximum displacement from equilibrium.

In this question, the equilibrium is in the center of the two extremes. With one extreme at \(x = 10\; {\rm cm}\) and the other at \(x = 50\; {\rm cm}\), the center will be at \((1/2)\, (10 + 50)\; {\rm cm} = 30\; {\rm cm}\).

The maximum displacement will be \((50\; {\rm cm} - 30\; {\rm cm}) = 20\; {\rm cm}\) (or equivalently, \((30\; {\rm cm} - 10\; {\rm cm}) = 20\; {\rm cm}\).

Frequency measures the number of cycles completed in unit time (e.g., one second.) In one full cycle of an SHM, the oscillator will travel from one extreme to another and then back to the original extreme. In this question:

In other words, one full cycle of this SHM will take \(0.25\; {\rm s} + 0.25\; {\rm s} = 0.50\; {\rm s}\). The period of this SHM will be \(0.50\; {\rm s}\). Hence, the frequency of this SHM will be:

\(\begin{aligned} (\text{frequency}) &= \frac{1}{(\text{period})} \\ &= \frac{1}{0.50\; {\rm s}} \\ &= 2\; {\rm Hz}\end{aligned}\).

Explanation:

a boy walks at 2m/s for 30sec and run at 5m/s for 20sec. what is his average speed

Element molecules consist of a single type of atom and are held together by covalent bonds. The model would have uniform-colored balls connected by sticks representing these bonds.

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Freud believed there was a large psychoanalysis part of the mind. This belief led to a study of preconscious, conscious and unconscious.

According to him, the unconscious mind is the primary source of human behavior.

Psychoanalysis can simply be defined asa system of psychological theory and therapy which aims to treat mental disorders by investigating the interaction of conscious and unconscious elements in the mind and bringing repressed fears and conflicts into the conscious mind

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A sample descriptive essay about the basic steps of the scientific method is given below:

When a person is testing a hypothesis, it is important that he collects data and then makes an analysis of it, and puts it through a controlled experiment at the lab.

Next, he would have to peer-review the results of the experiments and when this is confirmed, it becomes a theory,

This refers to the process of systematic observation that is used to come to a conclusion in a scientific investigation.

Hence, we can see that the descriptive essay about the scientific method is given above,.

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A block resting on a frictionless surface experiences a horizontal force that pulls another block atop it to the right, where the two blocks travel in tandem without slamming.

Response and justification The higher block's acceleration is also equal to 3 m/s2 because there is no relative motion between the upper and lower blocks.

Block A and a level floor have a static friction coefficient of 0.45, while Block B has a static friction coefficient of 0.30. Each brick weighs 2.0 kg.

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Answer:

its terminal velocity is 19.70 m/s

the velocity of a 58.0-kg person hitting the ground, assuming no drag contribution in such a short distance is 8.85 m/s

Explanation:

Firstly,

given that

m = 580g = 0.58kg

Area A = 0.11 * 0.22 = 0.0242m

g = 9.8

idensity constant p = 1.21 kg/m^3

the terminal velocity of the sphere Vt is ;

Vt = √ ( 2mg / pCA)

we substitute

Vt = √ ( (2*0.58*9.8) / (1.21*1*0.0242)

Vt = √ (11.368 / 0.029282)

Vt = √ ( 388.22)

Vt = 19.70 m/s

its terminal velocity is 19.70 m/s

What will be the velocity of a 58.0-kg person hitting the ground, assuming no drag contribution in such a short distance?

The Velocity of the person is;

V2 = √ 2ax

V2 = √ ( 2 * 9.8 * 4 )

V2 = √ (78.4)

V2 = 8.85 m/s

 the velocity of a 58.0-kg person hitting the ground, assuming no drag contribution in such a short distance is 8.85 m/s

The actual difference between the guage pressure of a system and an absolute pressure is the same as the pressure at the surface of the fluid.

The correct answer choice is option b.

It follows that the two pressure system mentioned in the given task above has a zero point system as their principle of operation.

When we talk of guage pressure, it uses atmospheric pressure as its own zero point system. However, the sum of both the guage pressure and atmospheric pressure gives what we know as the absolute pressure.

So therefore, we can now deduced that the pressure on a liquid surface is equivalent to the variation between the gauge pressure and absolute pressure.

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Answer:

velocity

Explanation:

Answer:

Velocity

Velocity tells you the speed and the direction it's going. Speed only tells you the speed, with no direction.

Explanation:

Answer:

1. Two bright bands would appear on the screen in line with the slits.

2. Waves that make up the radiation collide with each other so that they add together or cancel each other out.

3. Waves that are in phase constructively interfere to create bright bands.

4. Waves that are out of phase destructively interfere to form dark bands.

5. The spacing between the bright fringes will decrease.

6. 581 nm

Explanation:

Answer:

The period of the wave is 0.33 seconds. The formula used to calculate this is T=T/f, where T is the total time (6 seconds) and f is the frequency (18).

Answer:

3670 lb.

Explanation:

If we measure the force in pounds, distance in ft and time in hours, then the force need to keep the car from skidding is given by

where k is a constant, w = weight, R = radius of the path, and v = velocity of the car.

Now we know that when v = 45 mph, w = 1800 lb, R = 425, and F = 2600 lb; therefore,

and we need to solve for k.

simplifying the above gives

solving for k gives

Now that we have the value of k, we can find the force needed for

There seemes to be a technical issue with the answer tab. So I wont be able to complete the explanation. But you can find the force by F = (221/729)*(1800*(55^2))/450.

Answer:

Biochar is produced by heating biomass in the total or partial absence of oxygen. Pyrolysis is the most common technology employed to produce biochar, and also occurs in the early stages of the combustion and gasification processes. Besides biochar, bio-oil and gas can be collected from modern pyrolysers.

Answer:

at the end of its first second of fall

Explanation:

Can I have brainliest

Answer:

104653.13J

Explanation:

Given parameters:

Mass of roller coaster  = 625kg

Speed  = 18.3m/s

Unknown:

Kinetic energy  = ?

Solution:

The kinetic energy is the energy due to the motion of a body.

     Kinetic energy  = \(\frac{1}{2}\) x m x v²  

m is the mass

v is the speed

    Kinetic energy  =  \(\frac{1}{2}\)  x 625  x  18.3²   = 104653.13J

Answer:

I have no clue I'm just trying to get points

Explanation:

:) sorry

Answer:

Explanation:

The acceleration of an object given it's mass and the force acting on it can be found by using the formula

\(a = \frac{f}{m} \\ \)

where

f is the force

m is the acceleration

From the question we have

\(a = \frac{6.2}{3.2} \\ = 1.9375\)

We have the final answer as

Hope this helps you

Answer:

After the firing occurs, both the cannon and cannonball have the same momentum (big mass, small velocity vs. small mass, big velocity). But since the momentum for each is moving in the opposite direction, the momentums cancel out, causing the cannon-cannonball system's momentum to equal zero.

Explanation:

The required choice is for both the lines are conductor and conductor.

A conductor is something that easily allows current to flow through it. As an example, consider metal or any other metal. An insulator is something that does not allow current to travel through it. Polyurethane is an example.

Here,
Inside each socket are two pairs of metal strips that are engineered to bend and flex but return to their original shape when pressure is released. Each pair of strips is linked to one of your power lines (either hot or ground).

When you insert the wall plug, springy brass fingers hold the plug prongs, allowing you to connect to your home's electrical system.

Thus, the required choice is for both the lines to be conductor and conductor.

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Answer:

Yes it is

Explanation:

the sum moles at the left side equals the sum of moles at the right side

Answer:120

Vav = S / t = (120 + 45) m / (4 + 60) sec = 2.6 m/s

Considering the Coulomb's Law, the magnitude of the charge on each particle is 4.2426 C.

Coulomb's law or law of electrostatics is the relationship between the interactions of electric charges, that is, it explains the force experienced by two electric charges at rest.

This law says that the electric force with which two point charges at rest attract or repel each other is directly proportional to the product of the magnitude of both charges and inversely proportional to the square of the distance that separates them, expressed mathematically as:

\(F=k\frac{Qq}{d^{2} }\)

where:

The force is attractive if the charges are of opposite sign and repulsive if they are of the same sign.

In this case, you know that:

Replacing in the Coulomb's Law:

\(1.8x10^{-8} N=9x10^{9} \frac{Nm^{2} }{C^{2} }\frac{Qq}{(0.3 m)^{2} }\)

Being Q=q:

\(1.8x10^{-8} N=9x10^{9} \frac{Nm^{2} }{C^{2} }\frac{q^{2} }{(0.3 m)^{2} }\)

Solving:

1.8×10⁻⁸ N÷ 9×10⁹ \(\frac{Nm^{2} }{C^{2} }\)= q²÷ (0.3 m)²

2×10⁻¹⁸ C²/m²= q²÷ (0.3 m)²

2×10⁻¹⁸ C²/m²= q²÷ 0.09 m²

2×10⁻¹⁸ C²/m² ×0.09 m²= q²

1.8×10⁻¹⁹ C²= q²

√1.8×10⁻¹⁹ C²= q

4.2426 C= q= Q

Finally, each charge has a value of 4.2426 C.

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the force the woman exerts to do a push-up at constant speed is 333 N.

the work the woman does is 152 J.

her useful power output is 76 W.

(a) To calculate the force the woman exerts to do a push-up, we need to use torque methods. The woman is doing a push-up at constant speed, which means that the net torque on her body is zero. The only torque acting on her body is due to her weight W, which acts at the center of mass of her body. The distance between her center of mass and her hands is 0.76 m, and the angle between her body and the horizontal is 45 degrees.

The torque due to her weight about her hands is given by:

τ = r x W = (0.76 m) x (cos 45°)(W)

where r is the distance between her hands and her center of mass and cos 45° is the component of the distance perpendicular to the weight vector. Since the woman is at constant speed, the torque she exerts about her hands must be equal and opposite to the torque due to her weight. Therefore:

τ = (0.76 m)(cos 45°)(W) = (1/2)(W)(0.76 m)

Solving for W, we get:

W = 2(τ/0.76 m) = 2[(0.5)(mg)(0.76 m)/(0.76 m cos 45°)] = 333 N

Therefore, the force the woman exerts to do a push-up at constant speed is 333 N.

(b) The work the woman does is equal to the change in her potential energy as her center of mass rises. The woman's mass is not given, so we will assume a value of 60 kg. The gravitational potential energy of the woman is given by:

U = mgh

where m is the mass of the woman, g is the acceleration due to gravity (9.81 m/s^2), and h is the height her center of mass rises (0.26 m). Therefore:

U = (60 kg)(9.81 m/s^2)(0.26 m) = 152 J

Therefore, the work the woman does is 152 J.

(c) The useful power output of the woman is the work she does per unit time, taking into account the work done in lowering her body. Each push-up involves two phases: lifting her body and lowering her body. When she lowers her body, the work done is negative, as the force she exerts is in the opposite direction to the displacement. The work done in lowering her body is equal to the work done in lifting her body, so the total work done in one push-up is zero.

The woman does 30 push-ups in 1 minute, which means she does one push-up every 2 seconds. Therefore, the useful power output of the woman is:

P = (152 J)/(2 s) = 76 W

Therefore, her useful power output is 76 W.

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Answer:

Endurance, or aerobic

Strength, or resistance training

Balance

Flexibility

Explanation:

Answer:

Walking. Walking is simple, yet powerful. It can help you stay trim, improve cholesterol levels, strengthen bones, keep blood pressure in check, lift your mood, and lower your risk for a number of diseases (diabetes and heart disease, for example).

Answer:

can u show question 1?

Explanation:

Solution :

c). \($\vec{F}_A = $\) force applied by Abe

   \($\vec{F}_B = $\) force applied by Barry

   \($\vec{F}_E = $\) force applied by Eric

   \($\vec{F}_R = $\) Resultant force

\($\vec{F}_A $\)  in the vector form can be written as :

         \($\vec{F}_A = 0 \hat{i} + 60 \hat{j}$\)

\($\vec{F}_B $\)  in the vector form can be written as :

         \($\vec{F}_B = 60 \hat{i} + 0 \hat{j}$\)

The resultant,

\($\vec{F}_R= \vec{F}_A+\vec{F}_B $\)

     \($=(0 \hat i + 60 \hat j)+(60 \hat i + 0\hat j)$\)

    \($=60 \hat i + 60 \hat j$\)

\($|\vec{F}_R| = \sqrt{60^2+60^2}$\)

        = 84.853 N

d). As the three forces are in equilibrium, therefore,

\($|\vec F_E| = |\vec F_R|$\)

\($|\vec F_E| =84.853 \ N$\)

e). The direction of the force exerted by Eric is exactly opposite to the direction of the resultant force.

The direction of the resultant force is :

\($\theta = \tan ^{-1}\left(\frac{F_y}{F_x}\right)$\)

   \($ = \tan ^{-1}\left(\frac{60}{60}\right)$\)

  = 45°  north east

The direction of the force E is  45° west or  45° south west.

Answer:

2.55 s

Explanation:

To know how long does it take to rise, we will use the following equation:

Where:

vf is the final velocity, so at the highest point is 0 m/s

vi is the initial velocity, in this case, 25 m/s

a is the acceleration due to gravity, so a = 9.8 m/s²

And t is the time that it takes to rise.

Therefore, we can replace the values and solve for t as:

So, the answer is 2.55 s

To determine the angle through which the wheel rotates in 1.00 second, we can start by finding the angle covered in 0.0710 seconds and then scale it up to 1.00 second.

In 0.0710 seconds, the wheel completes 3.10 revolutions. One revolution corresponds to an angle of 360 degrees or 2π radians. Therefore, in 0.0710 seconds, the wheel rotates through an angle of:

Angle = 3.10 revolutions * 2π radians/revolution = 6.20π radians

To find the angle in 1.00 second, we can use proportional reasoning. Since the time increases by a factor of 1.00/0.0710, the angle covered will also increase by the same factor:

Angle in 1.00 second = 6.20π radians * (1.00/0.0710) = 87.32π radians

Approximately, the angle through which the wheel rotates in 1.00 second is 274.39 radians.

Therefore, the wheel rotates through an angle of approximately 274.39 radians in 1.00 second.

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