find the volume of a gas in liters if 2.95 mol has a pressure of 0.760 atm at a temperature of 52oc. group of answer choices

A. The average speed you can use to pull the safe is 1.02 m/s

B. The time needed to pull the safe up is 17.65 s

First, we shall obtain the force. This is shown below:

F = mg

F = 60 × 9.8

F = 588 N

Finally, we shall obtain the average speed. Details below:

Power = force × average speed

600 = 588 × average speed

Divide both sides by 588

Average speed = 600 / 588

Average speed = 1.02 m/s

The time needed to pull the safe up can be obtained as follow:

Time = Total distance / average speed

Time = 18 / 1.02

Time = 17.65 s

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Complete question:

You know you can provide 600 W

of power to move large objects. You need to move a 60-kg

safe up to a storage loft, 18 m

above the floor.

Part A

With what average speed can you pull the safe straight up?

Part B

What is the time needed to pull the safe up?

Explanation:

13x - 26 + 39 = 0

13x=26-39

13x=-13

x= -1

\(13x-26+39=0\\\\\implies 13x +13 = 0\\\\\implies 13x = -13\\\\\implies x = -\dfrac{13}{13}\\\\\implies x = -1\)

Approximately 0.123 kg of liquid water at 26 degrees Celsius would be needed to melt 41 grams of ice.

To calculate the minimum amount of liquid water required to melt 41 grams of ice at 0°C, we need to consider the energy required for the phase change from solid to liquid, which is known as the specific heat of fusion of ice.

The energy required to melt 1 kg of ice is 3.33×105 J/kg.

Therefore, the energy required to melt 41 grams of ice is (3.33×105 J/kg) × (41/1000) kg = 13653 J.

To calculate the amount of liquid water required, we use the specific heat capacity of water, which is 4180 J/kg/°C.

Assuming the initial temperature of water is 26°C, the amount of water needed can be calculated as (13653 J) ÷ (4180 J/kg/°C) ÷ (26°C) = 0.123 kg or approximately 123 ml of water.

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Answer: Based on evidence

Explanation: Scientific knowledge is based on evidence and is included in scientific theories: consistent and deductively complete sets of propositions around a topic of scientific interest, which describe it and give it a verifiable explanation.

100x110 is another rectangular park. It has the same perimeter, but its area is 11000, while the other one is 10200.

The most important distinction between area and perimeter is: The term "perimeter" refers to the length of the shape's outer boundary, while "area" refers to the area that the shape occupies. The size of a shape is determined by both parameters. A two-dimensional equable shape, also known as a perfect shape, has an area that is numerically equal to its perimeter. For instance, the area and perimeter of a right-angled triangle with sides 5, 12, and 13 have the same unitless numerical value of 30.

The area of a rectangle and its perimeter are not directly related.

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The following is not a source of outdoor air pollution : D) Household cleaning products.

Presence of one or more substances in air at concentration or for a duration above the natural level is called air pollution.

Outdoor air pollution refers to pollutants that are released into the atmosphere by sources outside of buildings or structures. The sources of outdoor air pollution can be natural or human-made. Some examples of sources of outdoor air pollution are:

A) Exhaust from cars and trucks

B) Smoke from factories and power plants

C) Pollen from trees and plants

D) Solid fuel burning

E) Forest fires

Therefore, the correct option is D) Household cleaning products.

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Note: The question given on the portal is incomplete. Here is the complete question.

Question: Sierra lives in a southwestern town in a valley where air pollutants sometimes settle. The mountains that surround the town keep air pollution from blowing away. Sometimes Sierra can actually see the pollution in the air. Which choice is NOT a source of outdoor air pollution?

A) Exhaust from cars and trucks

B) Smoke from factories and power plants

C) Pollen from trees and plants

D) Household cleaning products.

Answer:

c and d

Explanation:

I got your back bro ;)

Answer:

C and D

Explanation:

The average speed of the baseball is  option  a. 40 m/s .

To calculate the average speed of the baseball, we use the formula:

Average Speed = Distance / Time

Given:

Distance = 18.4 m

Time = 0.46 s

Plugging in the values, we have:

Average Speed = 18.4 m / 0.46 s = 40 m/s

Therefore, the average speed of the baseball is 40 m/s.

Option a, 40 m/s, is the correct answer. This means that the baseball traveled an average distance of 40 meters per second from the pitcher's mound to home plate.

Average speed is a scalar quantity that represents the total distance traveled divided by the total time taken. It gives us an idea of how fast an object is moving on average over a given distance.

In this case, the baseball covered a distance of 18.4 meters in a time of 0.46 seconds. Dividing the distance by the time gives us the average speed of 40 m/s.

It's important to note that average speed is a measure of the overall rate of motion and does not provide information about the direction of motion. Therefore, negative values such as option b (-40 m/s) or extremely small values such as option c (0.03 m/s) are not appropriate in this context.

Option d (8.5 m/s) is also incorrect as it does not match the calculated average speed of 40 m/s.

Therefore, the correct answer is option a, 40 m/s, as it accurately represents the average speed of the baseball.

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The movement of plates is explained by the theory of plate tectonics, which proposes that the Earth's lithosphere (made up of rigid plates) moves slowly over the underlying, more fluid asthenosphere due to the circulation of heat from the Earth's interior

What is Tectonics Plates?

Tectonic plates are large pieces of the Earth's lithosphere (made up of the crust and uppermost part of the mantle) that move around on the underlying asthenosphere, a more fluid layer of the mantle. The lithospheric plates are rigid and brittle, and they move in response to forces generated by the circulation of heat in the Earth's interior. The movement of the plates causes many geological features such as mountains, volcanoes, earthquakes, and oceanic trenches.

There are several major and minor tectonic plates, including the Pacific Plate, the North American Plate, the African Plate, the Eurasian Plate, and the Antarctic Plate. These plates interact with each other at their boundaries, which can be divergent (moving apart), convergent (moving towards each other), or transform (sliding past each other).

The lithospheric plates move apart at divergent boundaries, collide at convergent boundaries, and slide past each other at transform boundaries. These interactions at the boundaries cause many geological features such as volcanoes, mountain ranges, and earthquakes. The plate tectonics theory has been supported by various lines of evidence, including the study of earthquakes, magnetic anomalies, and the distribution of fossils and rocks around the world.

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The direction of the resultant force is 48⁰.

The horizontal component of the force is calculated as follows;

10 N is inclined to 35⁰ to the horizontal

Fx = 10 x cos(35)

Fx = 8.19 N

6 N is inclined to 70⁰ to the horizontal

Fx = 6 x cos(70)

Fx = 2.05 N

∑Fx = 8.19 + 2.05

∑Fx =  10.24

The vertical component of the force is calculated as follows;

10 N is inclined to 35⁰ to the horizontal

Fy = 10 x sin(35)

Fy = 5.74 N

6 N is inclined to 70⁰ to the horizontal

Fy = 6 x sin(70)

Fy = 5.64 N

∑Fy = 5.74 N + 5.64 N

∑Fy =  11.38 N

θ = arc tan(ΣFy/ΣFx)

θ = arc tan(11.38/10.24)

θ =  48⁰

Thus, the direction of the resultant force is 48⁰.

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Answer:

Explanation:

Vector add the two forces

If we assume the forces lie on a unit circle

25cos180 + 10cos0 = -15 or 15cos180 N

The magnitude of -15 = |-15| = 15 N

The two forces acting from opposite directions will cancel each other in magnitude. The net force acting on the box is 15 N to the left.

Force is an external agent acting on a body to deform it or to change its state of rest or motion. Force is a vector quantity and its characterised by its magnitude and direction.

If two forces acting on a body from the same directions, then the net force will be the sum of these two  forces. If these forces are acting from opposite directions, they will cancel each other in magnitude.

Here, 10 N is acting to right and 25 N to the left. Hence, the net force will be 25 -10 = 15 N to the right, because the greater force is to the right. Hence, option B is correct.

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The magnitude of the electric flux through the sheet is 4.05 N m² C⁻¹ (Option E).

The electric flux through a surface is given by the product of the electric field strength and the area of the surface projected perpendicular to the electric field.

In this case, the electric field strength is 18 N C⁻¹, and the area of the sheet projected perpendicular to the electric field is 0.450 m²

(since the normal to the sheet makes an angle of 60° with the electric field). Multiplying these values gives the electric flux:

Electric flux = Electric field strength × Area

Electric flux = 18 N C⁻¹ × 0.450 m²

Electric flux = 8.1 N m² C⁻¹

In summary, the magnitude of the electric flux through the sheet is 4.05 N m² C⁻¹. This value is obtained by multiplying the given electric field strength by the projected area of the sheet perpendicular to the electric field.

The angle of 60° is taken into account to determine the effective area for calculating the flux.(Option E).

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The buoyant force can be determined by subtracting the apparent weight of the object in water from its weight in air. In this case, the buoyant force would be 7N - 4N = 3N.

Based on the information provided, since the buoyant force (3N) is less than the weight of the object (7N), the object will not float.

Floating occurs when the buoyant force is greater than or equal to the weight of the object.

In this scenario, the object will experience a net downward force, indicating that it will sink rather than float in water.

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A rock thrown horizontally from the roof edge of a 10.9 m-high building hits the ground below, a horizontal distance of 14.4 m from the building. The overall speed of the rock when it hits the ground will be 9.6 m/s

The branch of physics that defines motion with respect to space and time, ignoring the cause of that motion, is known as kinematics. Kinematics equations are a set of equations that can derive an unknown aspect of a body’s motion if the other aspects are provided.

given

height = s = del y =  - 10.9 m

u(y) = initial velocity (vertical) = 0

u(x) = initial velocity (horizontal)  = ?

a(y) = vertical acceleration = 9.8 \(m/s^{2}\)

a(x) = horizontal acceleration = 0

using kinematics equation

del y = u (y) * t + 1/2 (a(y)) \(t^{2}\)

- 10.9 = - 1/2 * 9.8 *   \(t^{2}\)

time = 1.5 seconds

del x = u (x)

del x = u (x) * t+  1/2 (a(x)) \(t^{2}\)

14.4 = u (x) * t

14.4 = u(x) * 1.5

u(x) = 14.4 / 1.5 = 9.6 m/s

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Answer:

a

     \(l_o  =52 \  m\)

b

      \(l = 37.13 \ LY\)

Explanation:

From the question we are told that

    The  speed of the spaceship is  \(v  =  0.800c\)

    Here  c is the speed of light with value  \(c =  3.0*10^{8} \ m/s\)

    The  length is  \(l = 31.2 \  m\)

     The  distance of the star for earth is \(d = 145 \  light \  years\)

     The  speed is \(v_s = 2.90 *10^{8}\)

Generally the from the length contraction equation we have that

       \(l  =  l_o  \sqrt{1 -[\frac{v}{c } ]}\)

Now the when at rest the length is  \(l_o\)

So  

      \(l_o =\frac{l}{\sqrt{ 1 - \frac{v^2}{c^2 } } }\)

      \(l_o =\frac{ 31.2 }{ \sqrt{1 - \frac{(0.800c ) ^2}{c^2} } }\)

      \(l_o=52 \  m\)

Considering b  

  Applying above equation

            \(l  =l_o \sqrt{1 -  [\frac{v}{c } ]}\)

Here \(l_o  =145 \  LY(light \ years )\)

So

           \(l=145 *  \sqrt{1 -  \frac{v_s^2}{c^2 } }\)

            \(l =145 *  \sqrt{ 1 - \frac{2.9 *10^{8}}{3.0*10^{8}} }\)

            \(l = 37.13 \ LY\)

Hi there!

Recall the equation for the magnetic field produced by a solenoid:

\(B = \mu_0 ni\)

B = Magnetic field (T)
n = number of turns per unit length (103 turns/m)

i = Current in solenoid (In this instance, changes with respect to time)

Using Faraday's Law:

\(\epsilon = -N\frac{d\Phi_B}{dt}\)

ε = Induced emf (V)
N = Number of loops in coil (15 turns)

\(\frac{d\Phi_B}{dt}\) = Change in magnetic flux with respect to time (Wb/s)

We know that magnetic flux is equal to:
\(\Phi_B = \oint B \cdot dA = B\cdot A\)

Since the cross-sectional area remains constant, we can take it out of the time-derivative. Since the current in the solenoid varies with time, we know that its magnetic field must also vary.

\(\frac{d\Phi_B}{dt} = A * \frac{dB}{dt}\)

Solving for dB/dt, since the solenoid's current is the only thing changing with respect to time:
\(\frac{dB}{dt} = \mu_0 n * \frac{di}{dt}\)

We must first differentiate I(t) using trig and chain derivative rules.

If:
\(f(x) = \alpha sin(\beta t)\\\\f'(x) = (\alpha * \beta) cos(\beta t)\)

Therefore:
\(\frac{di}{dt} = (5 * 120)cos(120t)\\\\\frac{di}{dt} = 600cos(120t)\)

So, dB/dt equals:

\(\frac{dB}{dt} = \mu_0 n\frac{di}{dt}\\\\\frac{dB}{dt} = (4\pi * 10^{-7})(103)(600cos(120t))\\\\\frac{dB}{dt} = 0.0777cos(120t)\)

Now, substituting this expression into the equation for Faraday's Law:
\(\epsilon = -N_{coil} * A * \frac{dB}{dt} \\\\\epsilon = -15 * \pi(0.02^2) * 0.0777cos(120t)\\\\\epsilon = \boxed{-0.001464cos(120t) \text { V}}\)

**For 'A', I used the cross-sectional area of the solenoid because there is no magnetic field produced by the solenoid in the exterior of its opening. Thus, the magnetic field remains confined to an area of A = π(0.02²) = 0.00126 m², which is the value used to calculate the magnetic flux rather than the cross-sectional area of the coil.

**Also, the (-) sign in front of the function of the induced emf simply shows how the induced E-field and consequentially emf opposes the change in the solenoid's current.

Answer:

The air-water interface is an example of boundary. The transmitted portion of the initial wave energy is way smaller than the reflected portion. This makes the boundary  wave hard to hear.

When both the source of the sound and your ears are located underwater, the sound is louder because the sound waves can travel directly to your ear.

Explanation:

The air-to-water sound wave transmission is inhibited because more of reflection than transmission of the wave occurs at the boundary. In the end, only about 30% of the sound wave eventually reaches underwater. For sound generated underwater, all the wave energy is transmitted directly to the observer. Sound wave travel faster in water than in air because, the molecules of water are more densely packed together, and hence can easily transmit their vibration to their neighboring molecules, when compared to air.

Answer: The air-water interface is an example of boundary. The (transmitted) portion of the initial wave is way smaller than the (reflected) portion. This makes the (transmitted) wave hard to hear.

When both the source of the sound and your ears are located underwater, the sound is louder because the sound waves can (travel directly to your ears.)

Explanation:

The part of the sound wave that is transmitted across the boundary between air and water is much smaller than the part of the wave that is reflected. This is what makes it hard to hear your friend knocking two rocks together above the surface.

When you and the rocks are underwater, the sound that comes from knocking the rocks together can travel directly to your ears rather than having to be transmitted across mediums.

The car's vertical position \(y\) at time \(t\) is

\(y = 63\,\mathrm m - \dfrac12 gt^2\)

since it starts 63 m above the ground, and after leaving the cliff it accelerates downward due to gravity.

Its horizontal position \(x\) is

\(x = \left(29\dfrac{\rm m}{\rm s}\right) t\)

since the car leaves the cliff horizontally at 29 m/s, and is not influenced by any other acceleration in this plane.

1. Solve for \(t\) such that \(y=0\).

\(63\,\mathrm m - \dfrac12 gt^2 = 0 \implies t = \sqrt{\dfrac{126\,\rm m}g} \approx \boxed{3.6}\,\rm s\)

2. Solve for \(x\) at this value of \(t\).

\(x = \left(29\dfrac{\rm m}{\rm s}\right) \sqrt{\dfrac{126\,\rm m}g} \approx 104\,\rm m \approx \boxed{100}\,\rm m\)

The sky changes colors at sunset because the atmosphere ABSORBS some colors of light more than other colors.

The second choice ("The atmosphere bends light") is a correct statement, but it's not the reason that the sky changes colors at sunset.

Answer:

The atmosphere bends light.

Explanation:

I got the test, and passed! =)

An object is thrown with a horizontal velocity of 20 m/s from a vertical cliff that is 125 m above level ground. If air resistance is negligible, the time that it takes the object to fall to the ground from the cliff is nearly Five (5) seconds.

The horizontal velocity is the speed at which an object is traveling in a straight line. It can vary from object to object and can be affected by a number of factors. One of these factors is air resistance. Air resistance is a force that acts in the opposite direction to the motion of an object. It is a result of the air molecules pushing back against the object as it moves through it. The amount of air resistance acting on an object depends on its shape and size, as well as the speed at which it moves.

This means that as an object's horizontal velocity increases, the amount of air resistance acting on it also increases. This can slow down the object's velocity, or even cause it to come to a stop.

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Writing in an online journal is different from writing in a paper one in the following way: it is easier to communicate online (option B).

A journal is a newspaper or magazine dealing with a particular subject.

A journal is an efficient medium to communicate the findings or results of an investigation to the public.

However, a journal can be virtual (online) or paper (hard copy). In this 21st century, it is easier to communicate to the masses online because more audience will be captured.

Therefore, writing in an online journal is different from writing in a paper one in the following way: it is easier to communicate online.

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The answer is Positively and negatively charged particles are attracted to each other.

The rate energy is consumed this statement describes power.

Hence, Option C is correct answer.

Power is related to energy by that it is the rate at which energy is transferred.

It is a measure of the rate at which work is done.

According to the definition of power, Power is the amount of energy transferred or converted or consumed per unit time.

SI unit of power is watt.

By definition, 1 watt is equal to one joule of work done per second. So if P represents power in watts, E is the change in energy (number of joules) and t is the time taken in seconds then:

P=\(\frac{E}{t}\)= \(\frac{1 Joule}{1 Second}\)= 1 Watt.

Thus from the above conclusion we can say that, The rate energy is consumed describes power.

Hence, Option C is correct answer

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I assume this is the motion of the simple pendulum

T = 2π × \(\sqrt{\frac{L}{g } }\)

=> \(\frac{T1}{T2 }\) = \(\sqrt{\frac{g2}{g1} }\)

Given T1= 3s g1= 9.79 g2= 9.82

=> T2 = 3.00459 s

Answer:

The velocity is  \(v  = 796 \  m/s \)

Explanation:

From the question we are told that

   The mass of the bullet is  \(m_b  =  5.00\  g =  0.005 \ g\)

   The mass of the hand gun is  \(m_g  =  1.00 \ kg\)

    The speed of the gun is  \(v_b  =  8.00 * 10^{2} \  m/s\)

Generally from the law of momentum conservation

     \(m_b *  u_b  +  m_g *  u_g  =  m_b*  v_b +  m_g *  - v_g\)

here \(u_g\  and \   u_b\) are zero given that before the bullet was shot the gun was at rest

\(v_g\) is negative given because from Newtons third law action and reaction is equal and opposite so if the bullet is moving forward the gun will be moving backward

So

   \( 0.005 *  0  +  1* 0=  0.005 * 8.00 * 10^{2}  -   1.00*  v_g\)      

=>  \( v_g  =  4 \  m/s \)    

Hence the velocity of the bullet with respect to the loose gun is  

     \(v  =  v_b  -  v_g\)

=>   \(v  =  8.00 * 10^{2}   - 4\)

=>   \(v  = 796 \  m/s \)

Answer:

The maximum value of the magnetic field in the given wave is 6.67 nT.

Explanation:

Given;

maximum value of the electric field, E₀ = 2.0 V/m

The maximum value of the magnetic field in the given wave is calculated as;

\(B_o = \frac{E_o}{c}\)

where;

c is the speed of light = 3 x 10⁸ m/s

\(B_o = \frac{E_o}{c} \\\\B_o = \frac{2}{3 \ \times \ 10^8} \\\\B_o = 6.67 \ \times \ 10^{-9} \ T\\\\B_o = 6.67 \ nT\)

Therefore, the maximum value of the magnetic field in the given wave is 6.67 nT.

The formation of bubbles while heating a liquid can affect the coefficient of cubical expansion γ of the liquid. The coefficient of cubical expansion is a measure of how much a liquid expands when its temperature increases.

When bubbles form in a liquid, they create voids that decrease the effective volume of the liquid. As a result, the apparent expansion of the liquid is reduced, which decreases the value of γ.

The effect of bubble formation on the coefficient of cubical expansion depends on the size, number, and location of the bubbles. For example, if the bubbles are very small and evenly distributed throughout the liquid, the effect on γ may be negligible. On the other hand, if the bubbles are large and located near the surface of the liquid, they may significantly reduce the effective volume of the liquid and decrease the value of γ.

In addition, the formation of bubbles can also lead to other effects that affect the expansion of the liquid. For example, the vaporization of the liquid can cause a decrease in pressure, which can also affect the value of γ. Therefore, the formation of bubbles while heating a liquid can have complex effects on the coefficient of cubical expansion of the liquid, and the exact effect depends on various factors.

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By Newton's second law we have:

From the original mass, force an acceleration we have:

Now if we doubled the force and take a third of the mass we would have:

Therefore the acceleration in this case would be 72 meters per second per second.

Answer:

Explanation:

the 40-watt bulb is going to require less energy to power.

Answer:

Explanation:

7.80ly=7.379370e+16m