if you wanted to shift the potential of the lead-zinc cell upward, toward 0.70 v, which of the following actions would give the desired result? (select all that apply.)

The specific heat of the block is 3349J/kg C if a 500 g block of an unknown substance in an insulated container.

We know very well that if a system is in equilibrium state, it means that Heat loss = Heat gained

Also, Quantity of heat gained or released is given by = mcΔ∅

where m is defined as  mass of substance

c  is defined as the specific heat capacity

and Δ∅ is defined as the change in temperature

Therefore, applying the above formula by assuming heat lost by water will be heat gained by the block.

=>m₁×c₁×(∅₂-∅₁) = m₂×c₂×(∅₁-∅₃)

where m₁ is defined as the mass of block = 500g = 0.5kg

c₁ is defined as the specific heat capacity of unknown substance

∅₂ is defined as block initial temperature = 50°C

∅₁ is defined as equilibrium temperature of block and water after mix= 25°C

Also, we have m₂ as mass of water = 2kg

c₂ as specific heat capacity of water = 4186J/kg C

∅₃ as initial temperature of water = 20°C

Therefore, on putting the above quantities on above formula, we get

=>0.5×c₁×(50-25) = 2 x 4186×(25-20)

And we can find c₁ which is the unknown specific heat capacity

=>0.5×c₁×25=41860

=> c₁×12.5=41860

=>c₁=41860/12.5

=>c₁ =  3348.8J/kg C≅ 3349J/kg C

Hence, specific heat of the block is 3349J/kg C.

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\(\\ \tt\longmapsto Acceleration=\dfrac{v-u}{t}\)

\(\\ \tt\longmapsto Acceleration=\dfrac{25-0}{30}\)

\(\\ \tt\longmapsto Acceleration=\dfrac{25}{30}\)

\(\\ \tt\longmapsto Acceleration=0.8m/s^2\)

The emotion that occurs more often to more drivers is frustration.

What is frustration? Frustration is a feeling of dissatisfaction, displeasure, and discontent that arises as a result of an inability to fulfill a need or a goal. In driving, frustration is a common emotional state that occurs when a person is prevented from driving at their preferred pace, or when a person experiences unexpected events while driving, such as traffic jams or sudden accidents. Frustration may be caused by a variety of factors, including:

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The energy released by each fission reaction is approximately 1.91 x 10⁷ MeV, and the energy released per gram of 235U is approximately 4.49 x 10⁹ MeV/g.

To calculate the energy released by each fission reaction, we can use the mass-energy equivalence formula, E = mc². We need to calculate the change in mass and then convert it to energy.

The change in mass (\(\Delta m\)) can be calculated by subtracting the total mass of the products from the mass of the reactant (235U). Let's calculate the change in mass for the given fission reaction:

Change in mass (\(\Delta m\)) = (mass of 235U) - (mass of 144Ba + mass of 89Kr + 3 * mass of neutron)

= 235.043930 u - (143.922953 u + 88.917630 u + 3 * 1.0086649 u)

= 0.1940186 u

Now, we can convert the change in mass to energy using the mass-energy equivalence formula:

\(E = \Delta m \cdot c^2\)

where c is the speed of light, approximately 3.0 x 10⁸ m/s.

E = 0.1940186 u * (1.66053906660 x 10⁻²⁷ kg/u) * (3.0 x 10⁸ m/s)²

 = 3.40 x 10¹¹ kg * (9.0 x 10¹⁶ m²/s²)

 = 3.06 x 10⁶ Joules

To convert the energy from Joules to MeV, we use the conversion factor 1 MeV = 1.60218 x 10⁻¹³ Joules:

Energy released per fission = \(\[\frac{3.06 \times 10^6\ \text{J}}{1.60218 \times 10^{-13}\ \text{J/MeV}}\]\)

= 1.91 x 10⁷ MeV

Now, to calculate the energy released per gram of 235U, we need to determine the number of moles of 235U in 1 gram. The molar mass of 235U is 235 g/mol.

Number of moles of 235U = (\(\[= \frac{1\ \text{g}}{235\ \text{g/mol}}\]\))

 = 0.00426 mol

Energy released per gram of 235U = \([\frac{1.91 \times 10^7 \text{ MeV}}{0.00426 \text{ mol}} = 4.49 \times 10^9 \frac{\text{ MeV}}{\text{ g}}]\)

Therefore, the energy released by each fission reaction is approximately 1.91 x 10⁷ MeV, and the energy released per gram of 235U is approximately 4.49 x 10⁹ MeV/g.

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Answer:

C. An article written by a scientist

Explanation:

Research-based original articles written by a scientist can act as a primary source of information. Textbooks, dictionaries and encyclopedias are generally classified as secondary sources and are rarely primary sources.

Adjusting the thermostat to reduce the air conditioner usage to five hours a day would save $7.50 daily.

The cost to run the air conditioner for nine hours a day is $13.50. To find the cost per hour, we can divide the total cost by the number of hours: \(\frac{13.50}{9} = $1.50 per hour\).

If the air conditioner is only running for five hours a day, the daily cost would be 5 hours × $1.50 per hour = $7.50.

By adjusting the thermostat to reduce the air conditioner usage from nine hours to five hours, there would be a daily saving of $7.50. This reduction in operating time leads to decreased energy consumption, resulting in cost savings. It's important to note that these calculations assume a consistent electricity rate and do not consider other factors such as seasonal variations, maintenance costs, or the specific energy efficiency of the air conditioner.

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1. The ball hits the ground first is none because both balls will hit the ground together.

2. The initial horizontal velocity will have an affect on the horizontal distance traveled by the yellow ball.

The red ball simply dropped from a height.

The yellow ball is launched exactly horizontally at height h.

At y-axis

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As a result of the block being slightly lowered and then released, the oscillation frequency is  f = 3.5Hz.

In physics, what do oscillation and frequency mean?

Periodic to-and-fro motion that repeatedly repeats the same pattern is known as oscillatory motion. The to-and-fro movement of an object relative to its mean location is referred to as oscillatory motion. The frequency of oscillating particles is defined as the number of cycles that they complete in a second.

One oscillation is what?

The periodic to-and-fro oscillation of the a Simple pendulum was referred to as its oscillatory motion .One oscillations of a pendulum is defined as the motion of a bob starting from one tip and returning to the other.

We know that:

\(\begin{aligned}& F=-\mathrm{kx} \\& |F|=k x \\& m g=k x \\& \frac{\mathrm{k}}{\mathrm{m}}=\frac{\mathrm{g}}{\mathrm{x}} \\& \mathrm{f}=\frac{1}{2 \pi} \sqrt{\frac{\mathrm{k}}{\mathrm{m}}}=\frac{1}{2 \pi} \sqrt{\frac{g}{x}}=\frac{1}{2 \pi} \sqrt{\frac{9.8}{0.02}}=3.523 \mathrm{~Hz}\end{aligned}\)

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Answer:

15,000 m

Explanation:

\(speed = \frac{distance}{time} \)

speed = 50 m/s

time = 5 minutes × 60

= 300 seconds

substitute the values into the formula

\(50 = \frac{distance}{300} \)

\(50 \times 300 = distance\)

\(15000 \: m = distance\)

\(distance = 15000 \: m\)

Answer:

The answer is "Option A".

Explanation:

Please find the complete question in the attached file.

Kamala uses Gamma radiation inside this question should be very high, not very low. Electromagnetic radiation is a penetrating type resulting from radioactive nuclear decline. Its radiation is a very high-frequency, radioactive waveform to frequencies greater than \(10^{19} \ Hz\) usually emitted from the radioactive decline.

Answer:

A

Explanation:

edge 2022

The force applied on the object will be 5 newton in the downward direction due to the gravitational force acting on it.

if 5N force is applied in the upward direction then the force is said to be applied in +ve y axis where as the force of 10N due to gravitation applied downwards is said to be applied in the -ve y axis.

Both the forces hence will cancel out each other.

The total force applied on the objet can be represented as:

+5N + (-10N) = -5N

hence the force applied on the object is 5N in the downward direction.

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Answer:

Approximately 3.789 light years, rounded up from 3.7886325633462.

Explanation:

The Coma Cluster is a place without wired internet, so it would take the speed of light times 6.826732 to get you answer of 3.7886325633462.

The height of the image is approximately 1.066 cm, and since it is negative, it means that the image is inverted and smaller than the object.

Using the thin lens equation:

1/f = 1/d_o + 1/d_i

where f is the focal length of the lens, d_o is the object distance, and d_i is the image distance.

Plugging in the given values, we get:

1/4 = 1/16 + 1/d_i

Solving for d_i, we get:

d_i = 3.2 cm

Using the magnification equation:

m = -d_i/d_o

where m is the magnification of the image.

Plugging in the given values, we get:

m = -3.2/16 = -0.2

Since the magnification is negative, the image is inverted.

Finally, using the equation:

m = h_i/h_o

where h_i is the height of the image, and h_o is the height of the object.

Plugging in the given values and solving for h_i, we get:

h_i = m * h_o = (-0.2) * 5.33 cm = -1.066 cm

Therefore, the height of the image is approximately 1.066 cm, and since it is negative, it means that the image is inverted and smaller than the object.

What is magnification of lens?

The magnification of a lens is a measure of how much larger or smaller an image appears relative to the object that is being viewed through the lens. It is the ratio of the height of the image formed by the lens to the height of the object.

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Physical education objectives that may be accomplished in public and private sector physical education and sports programs include improving overall physical fitness and health, promoting teamwork and sportsmanship, developing motor skills and coordination, and fostering a lifelong love of physical activity.

These programs can help enhance cognitive and academic performance, build self-confidence and self-esteem, and instill values. Both public and private sector programs can provide access to a wide range of physical activities and sports, including individual and team sports, outdoor recreation, and fitness and wellness programs. The ultimate goal of these programs is to promote a healthy and active lifestyle among participants.

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The minimum amount that the spring must be compressed if the car is to stay on the track is 8.373 Xa.

let A be the starting point

Let B be the loop's top.

Given that K=31,000 N/m, m=840 kg, and r=6.3 m

Early Compression

Xa = ?

Final (spring is in natural state then) (spring is in natural state then)

Xb = 0

Please remember to find the minimal compression now. When the roller coaster is almost at separation, which means the normal force is equal to zero, we need to determine the velocity at the top of the hoop.

total force C = Mac

mVb = mVb²/R

We now use the work energy technique.

-(1/2) * k* (Xb²-Xa²) - mg(2r) = m * (Vb²-Va²) * (1/2)

Va = 0\s

Xb = 0\s-(1/2) * k * (-Xa^2) - mg(2r)

= (1/2)*(m*Vb*2) (1/2)*(k*Xa*2) - mg(2r)

= m * Vb * (1/2)

Isolate the deformation

Using algebra, Xa of the spring equals (1/2) * k * (Xa2) = (1/2) * m * Vb2 + mg (2r)

Substituting m/k * (gR) + m/k * g* into Vb²/ Xa²

2.89 m for 4r Xa²

= 8.373 Xa.

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Answer:

Force=2.484 N

Explanation:

\(f = \frac{w}{gh} \\ = \frac{297}{9.8 \times 12.2} \\ f = 2.484 \: n \)

Hope it helped

PLS mark BRAINLIEST

A wagon of mass 42 kg is pushed by a student a distance of 12.2 meters, and 297 j of work was done on the wagon force did the student apply is 24.34 N.

A force is an effect that can alter an object's motion according to physics. An object with mass can change its velocity, or accelerate, as a result of a force. An obvious way to describe force is as a push or a pull. A force is a vector quantity since it has both magnitude and direction.

work = force*distance

force = work/distance

force = 297/12.2

force = 24.34 N

A wagon of mass 42 kg is pushed by a student a distance of 12.2 meters, and 297 j of work was done on the wagon force did the student apply is 24.34 N.

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The magnitude of a vector represents its direction. The phrase also refers to a quantity's mathematical or geometrical representation.

A vector is a quantity or phenomena with magnitude and direction that are independent of one another. The phrase also refers to a quantity's mathematical or geometrical representation.

If no vector can be written as a linear combination of the others, a set of vectors is said to be linearly independent.

If no vector in a collection of vectors can be written as a linear combination of the ones mentioned before it, the set is said to be linearly independent.

Hence, the magnitude of a vector represents its direction.

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ANSWERS

(a) Year - Population

• 1980 - 101,240

• 1990 - 142,949

• 2000 - 201,843

• 2010 - 285,000

(b) 2016

EXPLANATION

(a) The population (in thousands) each year is given by,

If t = 1 represents year 1971, then for each year we have to find the difference between the year and 1970.

For year 1980,

The population is 101,240.

For year 1990,

The population is 142,949.

For year 2000,

The population is 201,843.

For year 2010,

The population is 285,000.

(b) In this problem we're given the population 350,000 and we have to find in what year the county will reach that population. In other words, we have to find t and then add that to 1970 to find the year.

Let's solve for t,

Divide both sides by 71.7,

Apply natural logarithm to both sides,

Divide both sides by 0.0345,

And finally replace P and solve. Remember that P is in thousands of years, so we have to replace it by 350,

This is 46 years after 1970,

Let's see what's the population in 2016 to check the answer,

It is a bit more than 350,000. But let's see what's the population in 2015,

In 2015 population of the county won't reach 350,000. Thus, the county will have a population of 350,000 in 2016

Answer:

They vary quite a lot, yet there are some similarities

Explanation:

With Mercury, you have a hot and barren expanse of rock

With Venus, you also have a fairly hot and barren expanse of rock, with a molten core

With Earth, you have a warm/cool variant with water and a full atmosphere

With Mars, you have a colder and barren expanse of valleys and rock, with a rather paste-like ground

With Jupiter, we have our first gas giant, covered in clouds with a thick atmosphere

With Saturn, it is yet another gas giant, with rings of gas and rock and a dense core of metals, such as iron and nickel

With Uranus, it is also rather gas-full with a fair amount of water and methane, which results in its bluish color (an ice giant)

And finally with Neptune, it is the other ice giant, consisting of water, methane, and ammonia

So there are some similarities (gases, water, land formations, etc.) and some differences (rings, temperature, structure, etc.). Our planets are very unique to one another and continue to engage and surprise us.

Heating curves display how the temperature varies during heating.

What happens to a heating curve during a phase change?

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Answer:

Day when I workout I feel I have more energy, but on days when I don't I feel sluggish and tired

Answer:

then you solve two torque one is anticlockwise and one is clock wise toque 1=force*perpendicular distance is equal to torque 2= force* perpendicular distance so tau = torque 1+ torque 2and give your answer

Answer:

W =  4 N (to balance the beam)

Explanation:

take moment at support Δ

∑M at Δ = 0 (note: clockwise is + and counter clockwise is - )

0 = W(100 - 30) + 2(60-30) + 1(50-30) - 12(30)

0 = W70 + 2(30) + 1(20) - 360

0 = W70 + 60 + 20 - 360

0 = W70 - 280

280 = W70

W = 280 / 70

W = 4 N (to balance the beam)

to take the reaction at support Δ

Δ = 12 + 1 + 2 + 4

Δ = 19 N

proof that W = 4

∑M at 12N = 0

0 = 19(30) - 1(50) - 2(60) - W(100)

0 = 570 - 50 - 120 - 100W

100W = 400

W = 400 / 100

W = 4 N -------- ok

Answer:

the temperature and volume

Answer:

P = 1600 W

Explanation:

The weight of the buggy on Mars is 40 N.

It landed on area of 0.025 m^2.

Pressure is given as force per unit area:

P = F / A

where F = force

A = area

Weight is a force, therefore, the pressure exerted by the buggy on that surface of Mars is:

P = 40 / 0.025

P = 1600 W

For an l = 2 electron, it can make a total of five different angles with the z-axis.

In quantum mechanics, the orbital angular momentum is quantized and is denoted by the quantum number l. The value of l determines the shape of the electron's orbital. For an l = 2 electron, the possible values of the angular momentum projection along the z-axis, denoted by the quantum number m, can range from -2 to +2. Each value of m corresponds to a specific angle that the electron can make with the z-axis.

The total number of angles that an l = 2 electron can make with the z-axis is determined by the range of allowed values for m. In this case, as m can take five different values (-2, -1, 0, 1, 2), the electron can make five distinct angles with the z-axis. These angles correspond to the different orientations of the electron's orbital in three-dimensional space.

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Energy is transported from the tropics to the polar regions chiefly by ocean and atmospheric currents.

Ocean currents transport thermal energy from the tropics to the polar regions, while atmospheric currents transport latent and sensible heat from the tropics to the polar regions. These transfers occur through different mechanisms that rely on Earth's rotation, wind patterns, and temperature differences. The primary way in which energy is transported from the tropics to the polar regions is through ocean currents, particularly the ocean conveyor belt. This is a system of currents that circulate in the Atlantic Ocean and are driven by differences in temperature and salinity. Warm water from the tropics flows northward, where it cools and sinks, eventually returning southward at depth. This circulation helps to regulate the climate of both the tropics and the poles. Atmospheric currents also play a role in the transport of energy from the tropics to the polar regions. Warm, moist air rises in the tropics and flows poleward at high altitude, where it cools and descends. This creates a circulation pattern known as the Hadley cell, which drives the trade winds and helps to distribute heat around the globe. In the polar regions, cold, dry air descends and flows equatorward at low altitude, completing the circulation pattern.

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Answer:

The answer is "\(0.13562748\)"

Explanation:

Please find the complete question in the attached file.

Using formula:

\(\bold{U_s=\frac{v^2}{rg}}\)

Given:

\(r=1.60 \times 10^2 \ m\\\\g=9.8\\\\v= 52.5\ \frac{km}{hr}= 14.583\ \frac{m}{s}\)

put the value into the above-given formula:

\(U_s= \frac{14.583^2}{160 \times 9.8}\)

    \(= \frac{212.663889}{1568}\\\\=0.13562748\)

The process of charging a conductor by bringing it near another charged object and then grounding the conductor is called Induction. The correct option is C.

The process described, in which a conductor is charged by bringing it near another charged object and then grounding the conductor, is known as induction. Induction involves the redistribution of charges within the conductor without direct contact between the two objects.

Here's how the process works: When a charged object is brought close to the conductor, the charges in the conductor are rearranged.

This occurs due to the electric field of the charged object influencing the distribution of charges within the conductor. However, the conductor itself remains electrically neutral overall.

If the conductor is then grounded, allowing it to make contact with the Earth or a large reservoir of charge, any excess charges in the conductor are neutralized or redistributed, resulting in the conductor becoming charged with the opposite polarity to that of the inducing object.

Therefore, the correct term for this process is c, induction.

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