The motion of the rocket labeled a is an example of motion with uniform (i.e., constant) __________. and nonzero
a. acceleration
b. velocity
c. position
d. time

When listening to this issue, add 10.5% by mass glucose solution. We must ascertain the density, modularity, and morality of the answer. Given currently 10.5% by mass glucose solution, 1.3 milliliters.

Molarity = 54.50 M

Explanation:

Thus, a 100 g solution would contain 10.5 g of glucose. Therefore, the solvent in this instance has a huge mass and is a solution. That is 100 g less the solute’s mass.

Molarity is defined as the number of moles of a solute in 1 liter of solution. It has mol/l unit.

Molar mass of glucose, C6H12O6 = (6*12) + (1*12) + (16*6)

= 72 + 12 + 96 = 180g/mol

Density of glucose solution = 1.03g/ml

Density in g/l = 1.03g/ml * 1ml/10^-3l

= 1030g/l

10.5% mass of glucose = 10.5/100 * 180

= 18.9g/mol

Molarity = density (g/l)/molar mass (g/mol)

= 1030/18.9

= 54.50 M

Therefore, we arrive at the solution of 54.50M

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The correct answer is Sustainability.

Sustainability is the main issue when evaluating energy sources for future generations.

Sustainable development is used to fulfill present demands without compromising the capacity of future generations to meet their own requirements. The assertion is accurate and offers a goal that many people want, but it makes no recommendations or guarantees about how to gauge progress toward sustainable development. Sustainability is frequently used interchangeably with "sustainable development".

The twenty-first century's primary engine of progress is energy. This query does not have the graph displaying the various energy sources, but I will do my best to assist you.

You must keep in mind that when choosing energy sources to reduce environmental deterioration, sustainability is the main consideration for future generations.

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The correct answers are:

The chart shows that (A. coal) was the main source of energy used in power plants.

To understand this chart in terms of climate change, scientists need to find out (B. how much carbon dioxide is emitted by each source).

For future generations, they also need to think about (B. how to maximize the use of clean sources of energy).

The freely falling apple will travel 268.32 meters along y-axis

We need to know about free fall motion to solve this problem. The free fall motion should follow this rule

vt = gt

vt² = 2gh

h = 1/2 . g . t²

where vt is final velocity, g is the gravitational acceleration (9.8 m/s²), h os height and t is time.

From the question above, we know that

t = 7.4 s

Use the third equation to get the distance (height)

h = 1/2 . g . t²

h = 1/2 . 9.8 . 7.4²

h = 268.32 m

The freely falling apple will travel 268.32 meters along y-axis.

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A charge q is located at the origin (0,0). the electric field at (x,y) is given (in terms of its components) by E1i^+E2j^+E3k^.

The size of the electric field produced by a point charge Q is determined by this equation. The distance r in the denominator is the separation between the point of interest and the point charge, Q, or the center of a spherical charge. Positive charge is moving in the opposite direction, toward a negative charge. Q1 will produce an E-field vector that points left at the origin, and Q2 will produce an E-field vector that points right. The electric force F, or Coulomb force, exerted per unit positive electric charge q at that place can be used to determine an electric field's strength, or E = F/q.

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Heat required to evaporate the water to steam is 5342 KJ

We know that,

[tex]Q_{t}[/tex] = c * m * ( [tex]T_{f}[/tex] - [tex]T_{i}[/tex] )

where,

[tex]Q_{t}[/tex] = Heat required to raise the temperature

c = Specific heat capacity

m = Mass

[tex]T_{f}[/tex] = Final temperature

[tex]T_{i}[/tex]  = Initial temperature

Given that,

m = 230 lb = 104.33 kg

[tex]T_{i}[/tex]  = 190 F = 87.78 °C

[tex]T_{f}[/tex]  = 100 °C (Because water boils at 100 °C to turn into steam)

c = 4190 J / kg °C

[tex]Q_{t}[/tex] = c * m * ( [tex]T_{f}[/tex] - [tex]T_{i}[/tex] )

    = 4190 * 104.33 * 12.22

[tex]Q_{t}[/tex] = 5341883.79 J = 5342 KJ

Heat is the amount of energy transferred between two bodies

Therefore, Heat required to evaporate the water to steam is 5342 KJ

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The volume of the balloon after 67 hours would be 119.98 L

mol of he = 4.90 mol

wt. of he = 4.90x 4 = 19.60 g

after 67 hours,

67 x 10 x [tex]10^{-3}[/tex] x 4 = 2.68 g

we know 1 L = 1000 g

so, volume of gas = 2.68 x [tex]10^{-3}[/tex] L

amount left = 16.92 g = 16.92 x [tex]10^{-3}[/tex] L

thus, volume after 67 hours = 119.98 L

A weather balloon, or also known as the sounding balloon, is a specially crafted balloon that is used to carry instruments above to the sky to send back information to the radio signal centres about atmospheric pressure, temperature, humidity and wind speed by means of a small, expendable measuring device called a radiosonde.

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In the system, kinetic energy from the moving water of the faucet turns the turbine. The Mechanical energy of the spinning turbine generates Electrical energy which is transformed into Thermal energy that causes the temperature of the water to increase. The water then becomes steam and gives off more Thermal energy into the atmosphere.

The mechanical energy spend on the turbine to spin would generate electrical energy. This electrical energy then converts the moving electric charge into thermal or heat energy. The heat would convert water to steam.

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A fan blows the air and gives it kinetic energy, an hour after the fan has been turned off, the kinetic energy turns into thermal energy.

The fact that all energy is conserved causes a heat flow, which raises internal (or thermal) energy, as the air molecules slow and lose kinetic energy.

Kinetic energy, which may be seen in the movement of an object, particle, or group of particles, is the energy of motion. Any moving item uses kinetic energy, such as a person walking, a baseball being thrown, a piece of food falling from a table, or a charged particle in an electric field.

The energy of a body in motion, or kinetic energy (KE), is essentially the energy of all moving objects. Along with potential energy, which is the stored energy present in objects at rest, it is one of the two primary types of energy.

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Answer:

The distance the electron travelled before coming to a stop is 195.19 x 10-13m

Explanation:

Flux in an electric field is given by;

Fe = qE

E= 12000 n/c.

q= 1.602x10-19 (charge of an electron)

Fe = 1.602x10-19c x 12000 n/c.

Fe= 1.92x10-17 N

Since F=ma

M = mass of an electron = 9.11x 10-31

a=?

1.92x10-17 N = 9.11x 10-31 x a

a = 1.92x10-17 N/9.11x 10-31

a = 2.11 x 1013

Given

V2= u2 +2as

Since v= 0 (final velocity is zero)

- u2 = 2as

(28.7)2 = -2 x (2.11 x 1013) x s

823.69 = -4.22 x 1013xs

S = 823.69/ -4.22 x 1013

S = 195.19 x 10-13m

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The vernal equinox in the year AD 10000 will lie in the constellation Scorpio.

Once every 25800 years a full cycle of precession is completed. There are 12 constellations which means it takes 25800 / 12 = 2150 years to move from one constellation to the next one. The order in which the vernal equinox moves from Aquarius is Capricorn, Sagittarius, Scorpio, Libra etc.

Now the year is 2022 AD where the vernal equinox just entered constellation Aquarius. In 4172 AD it would have entered constellation Capricorn, then constellation  Sagittarius in 6322 AD, then constellation  Scorpio in 8472 AD and then constellation  Libra in 10622 AD. This means that in 10000 AD it is still in constellation  Scorpio and yet to enter constellation  Libra.

Therefore, In the year 10000 AD, the vernal equinox will lie in the constellation Scorpio.

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Answer:

0.7 g/cm^3

Explanation:

Density = Mass / Volume

             = 84g / 120 cm^3

             = 0.7 g / cm^3

Formula:
distance traveled divided by time taken.

So 1.80 Divided by 30 =  0.06
Tabitha's average speed = 0.06

All Done!

The chemical formula of a binary molecular compound of hydrogen and a group 7a element that can reasonably be expected to be less acidic in aqueous solution than HBr is HF

Group 7a that forms binary molecular compounds of Hydrogen are  Halogens such as Iodine I, Bromine Br, Chlorine Cl and Fluorine F. Out of these four HF is the least acidic. This is calculated based on Acid dissociation constant. HF has the least value out of these four, so it is the least acidic.

A  binary molecular compound is a compound that consists of two non metals elements only.

Therefore, the chemical formula of a binary molecular compound of hydrogen and a group 7a element that can reasonably be expected to be less acidic in aqueous solution than HBr is HF.

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Answer:

The variance is 153.507 kg2 for a random sample of 10 subjects that have weights with a standard deviation of 12.3898 kg

Explanation:

Variance is a measure of variation. It is determined by averaging the squared deviations from the mean.

The degree of dispersion in your data collection is indicated by variation. The greater the spread of the data, the greater the variance in proportion to the mean.

The standard deviation is generated from variance and indicates how much each number deviates from the mean on average. The square of the standard deviation gives the formula for variance in this case.

S = σ2

where

s= variance

σ    = standard

s= 12.38982

s= 153.507 kg2

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The liquid at the top is the one with a density of 0.79 g/ml.

The matter with most density will stay at the bottom of the graduated cylinder. So when comparing the three given densities of 1.15 g/ml, 0.79 g/ml and 0.95 g/ml, the lowest density is 0.79 g/ml.

Density is nothing but weight of the matter. So basically the lighter one stays at top.

Therefore, the liquid at the top is the one with a density of 0.79 g/ml.

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An average cyclist travels at a speed of 23 mph. Time (t) = 5.1 hours if she wants to ride 190 kilometers.

The distance traveled in a unit of time is called speed. It refers to a thing's rate of movement. The scalar quantity known as speed is the velocity vector's magnitude. It has no clear direction. A faster rate of movement is indicated by a higher speed. It travels slower if the speed is lower. It has zero speed if it isn't moving at all.

The formula: can be used to determine the constant velocity of an object traveling straight forward.

r = d / t

where

r stands for rate or speed (sometimes denoted as v, for velocity)

d is the traveled distance.

t the amount of time needed to finish the movement

The average speed of an object over a period of time is given by this equation. We can see the object's average speed here, however at some moments over the time frame, it may have been moving faster or slower.

As the time interval gets closer to zero, the maximum average speed is reached. The speed at that moment is what you see when you look at a speedometer in an automobile. While you may have briefly reached a speed of 60 mph, your average speed over the course of 10 minutes could have been much higher or much lower.

190 Km (given)

1 km = 0.621 miles (should know)

So, 190 km = (190x0-621) miles

                  = 118 miles

23 miles per hour means,

23 miles- 1 hour

so, 118 miles - (118 × 1/ 23) hour

118 miles = 5.1 hour.

Time (t) = 5.1 hour

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At the pH of 4.24, both the concentration of clo- and hclo are equal.

The equal concentration of clo- and hclo are 5.75 x [tex]10^{-5}[/tex] M

When chlorine dissolves in water, a weak acid called hypochlorous acid is created. This acid then partially dissociates to produce hypochlorite or ClO. Oxidizers and the main disinfectants in chlorine solutions are HClO and ClO.

It is impossible to extract HClO from these solutions because it equilibrates with chlorine very quickly.

Many commercial bleaches, deodorants, and disinfectants contain the related chemicals sodium hypochlorite (NaClO) and calcium hypochlorite (Ca(ClO)2) due to their potent antibacterial qualities.

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It is crucial to warm crucibles before use to lessen thermal stress on them.

Crucibles and covers are made up of porcelain that are like ceramic that contains pores in it. Any kind of water molecules from the air gets trapped in the pores of these crucible and cover.

These water molecules need to be driven out before the initial massing of the crucible and cover. The preheating helps to drive out these water molecules from the pores.

By raising the crucible’s temperature to 200°C, moisture will be removed in this step. Crucibles are protected from potential moister risk by the moister elimination procedure.

Crucibles that are brand-new or have seen a lengthy pause should be progressively heated to 200°C.

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By elasticity, the most nearly load is D. 12370 N .

We need to know about elasticity to solve this problem. In elasticity, stress can be determined as

σ = e . δ

where σ is stress, e is elastic modulus and δ is the strain

From the question above, we know that:

e = 70 GPa = 70 x 10⁹  Pa

d = 15 mm = 0.015 m

δ = 0.001 mm/mm

Find the stress

σ = e . δ

σ = 70 x 10⁹ . 0.001

σ = 7 x 10⁷ Pa

Find the surface area of the aluminum rod

A = πR²

A = π(0.015/2)²

A = 1.77 x 10¯⁴ m²

Find the load

F / A = σ

F = σ x A

F =  7 x 10⁷ x  1.77 x 10¯⁴

F = 12375 N

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a. The measurement done by Bill is more precise than Tom. Because all the measurements done by Bill are measured up to mm and which are very close to each other, but for Tom's measurement value measured up to cm.

b. The measurement done by Tom is more accurate than Bill's measurement. Because the actual scale of meter scale is close to 1.001m, which is off by 1mm, but Bill's meter stick is 1.05m, which have errors in centimeters.

Length is one of the fundamental units in system of measurement. The SI unit of the length is meter. The meter scale is apparatus for measurement of the length of any object. Example: The length of square is 5 meters. Here, 5 is magnitude of the length and meter is the unit of length. 1 meter of meter scale is divided into 100 centimeters. Meter scale is used to measure the Length.

Note: The meter scale reading does not change with the temperature and other physical quantities. The scale used for measurement should not be affected by the physical environment, it should be available easily. Thus, to make any device for measurement of physical quantity above criteria should be kept in mind.

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If a sprinter reaches his top speed of 10.9 m/s in 2.84 s , his total time to cover a distance of 100 m is 10.59 sec

We know that,

a = u / t

s = ut + 1/2 a[tex]t^{2}[/tex]

where,

s = Distance

u = Initial velocity

a = Acceleration

t = Time

Given that,

Top speed = 10.9 m / s

Time taken to reach top speed = 2.84 s

a = 10.9 / 2.84 = 3.83 m / [tex]s^{2}[/tex]

During the time period of 2.84 s, the distance covered is ,

s = ( 0 * 2.84 ) + 1/2 ( 3.83 * [tex]2.84^{2}[/tex] ) = (3.83 * 8.07) / 2

s = 15.44 m

Consider the sprinter maintains a constant acceleration after reaching his top speed.

The distance remaining in 100 m track = 100 - 15.44 = 84.56 m

Time taken to cover 84.56 m at 10.9 m / s with no acceleration is

84.56 = ( 10.9 * t ) + 1 / 2 ( 0 ) ( [tex]t^{2}[/tex] )

t = 7.75 s

Total time taken = 7.75 + 2.84 = 10.59 s

Acceleration is the rate of change of velocity. It is represented as a. Its unit is m / [tex]s^{2}[/tex]

Therefore, if a sprinter reaches his top speed of 10.9 m/s in 2.84 s , his total time to cover a distance of 100 m is 10.59 sec

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The acceleration of the motor bike is 4 m/s².

To find the acceleration, the given values are,

Final velocity = 60 m/s

Initial velocity = 0 m/s

Time period = 15 seconds.

                     a = (vf - vi) / t m/s²

Acceleration  =  (change in speed) / (time for the change)

a = acceleration

vf = final velocity

vi= starting velocity

t  =  time

So the formula,

           a = Δv / t m/s²  

              =  (60 m/s)  /  (15)        

              = 4 m/s².

The acceleration of the motor bike is 4 m/s².

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Considering the definition of speed and velocity, the difference is that speed has no direction while velocity does take direction into account.

Speed ​​is a quantity that expresses the relationship between the space traveled by an object.

In other words, speed can be defined as the amount of space traveled per unit of time with which a body moves .

Velocity is a physical magnitude that relates the displacement of an object, the time it takes to make this change in position and direction.

Because the speed also considers the direction in which the displacement of an object occurs, it is considered a vector magnitude.

The difference between speed and velocity is that speed has no direction, that is, speed is a scalar, while velocity does take direction into account, being a vectorial magnitude.

In, summary, the difference is that speed has no direction while velocity does take direction into account.

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The electric field at 100cm is 5.39 x 10² N/C.

We need to know about the electric field to solve this problem. The electric field is the area affected by electric force. The magnitude of electric field at a distance from long infinite length and constant charge per unit length is given by

E = λ / (2πε₀d)

From the question above, we know that

λ = 30 nC/m

λ = 30 x 10¯⁹ C/m

d = 100 cm = 1 m

By substituting the given parameter, we get

E = λ / (2πε₀d)

E = 30 x 10¯⁹ / (2π . 8.85 x 10¯¹² . 1)

E = 5.39 x 10² N/C

Hence, the electric field at 100cm is 5.39 x 10² N/C.

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According to the newton's law of viscosity, the proportional constant that satisfies the relation between the shear strain rate and the velocity gradient is the Viscosity coefficient.

The fluid's resistance to flowing is measured by the coefficient of viscosity. The viscosity of a gas is often lower than that of a liquid. Fluidity is the opposite of viscosity. A liquid with a high viscosity thus has a poor fluidity. There are two forms of viscosity that are frequently used: dynamic viscosity and kinematic viscosity. Dynamic viscosity and kinematic viscosity are connected by the equation dynamic viscosity = kinematic viscosity, where is the density of the fluid. Centipoise is the definition of dynamic viscosity. Kinematic viscosity is measured in centistoke, whereas fluid density is measured in g/cc. One centistoke is determined by dividing one centipoise by one g/cc. Darcy's law uses dynamic viscosity to determine the rate of fluid flow in porous material.

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The unit of force in metric system is Newtons

A metric system is used for measuring things using units like mm, cm, m and km for length, g and kg for weight, s for time etc.

Newton can be defined as 1 kg m / [tex]s^{2}[/tex].

where,

kg = Kilogram

m = Meter

s = second

As we can clearly see all these units are part of metric system.

Therefore, the unit of force in metric system is Newtons

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An object in mechanical equilibrium is an object: a. at rest.

A system is at rest or equilibrium when the sum of all the forces acting on the body or the resultant force of the system is equal to zero (0), therefore, there is an equilibrium between them.

The general formula for calculating the resultant force on an object and determined if it is in mechanical equilibrium is the following:

Fr = ∑F

Where:

We can say that the resultant force is the algebraic sum of all the forces acting on a body.

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By Avogadro's number, the positive charge of plutonium is 4.5 x 10⁸ C.

We need to know about Avogadro's number to solve this problem. Avogadro's number is the number that explains how many atoms are in one mol. The Avogadro's number is

Na =  6,02 × 10²³ atoms / mol

From the question above, we know that

m = 1.21 kg = 1210 g

Ar = 244

λ = 94 protons/atom

By using Avogadro's number, we can calculate how many plutonium atoms

N = Na . n

N = 6,02 × 10²³ x gr/Mr

N = 6,02 × 10²³ x 1210/244

N = 3.01 x 10²⁵ atoms

Find the protons

protons = λ . N

protons = 94 . 3.01 x 10²⁵

protons = 2.83 x 10²⁷

Each proton has a charge 1.6 x 10¯¹⁹ C. Hence, the positive charge of plutonium is

Q = 2.83 x 10²⁷ . 1.6 x 10¯¹⁹ C

Q = 4.5 x 10⁸ C

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The speed when it collides with a metal atom = 27.5m/s

A particle or item in motion has a form of energy called kinetic energy. When work, which entails the energy transfer is done on an object by applying a net force, that object acquires kinetic energy.

In the electric field, the electron loses potential energy while gaining kinetic energy. You may calculate the kinetic energy as

[tex]K=\frac{m_e v^2}{2}=e E d[/tex]

Here,

[tex]\text { } m_e=9.11 \cdot 10^{-31} \mathrm{~kg}[/tex] is the mass of the electron;

[tex]e=1.6 \cdot 10^{-19} C[/tex] is the charge of the electron;

E is the electric field;

The distance that an electron travels is called d;

When we solve for the electron's speed, we arrive at:

[tex]v=\sqrt{\frac{2 e E d}{m_e}}[/tex]

Calculate yields:

[tex]v=\sqrt{\frac{2 \cdot 1.6 \cdot 10^{-19} C \cdot 0.060 N / C \cdot 3.6 \cdot 10^{-8} \mathrm{~m}}{9.11 \cdot 10^{-31} \mathrm{~kg}}} \approx 27,5 \mathrm{~m} / \mathrm{s}[/tex]

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Option a) True, the energy associated with swinging a bat is a type of kinetic energy.

In the terms of physics, the energy that a body or a particle possesses due to its motion is said to the kinetic motion.

It is also defined as the work that is required in order to accelerate a body from rest to the stated velocity.

If work is done on an object by applying a net force on the body of that object, the speed of the object changes and it thereby gains kinetic energy.

The body after gaining this energy tries to maintain it until and unless its speed changes.

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