We drive a distance of 1 kilometer at 20 km/h. then we drive an additional distance of 1 kilometer at 30 km/h. what is our average speed (in km/h)?

Answer:

B

Explanation:

The first modern personality test was the Woodworth Personal Data Sheet, which was first used in 1919. It was designed to help the United States Army screen out recruits who might be susceptible to shell shock.

so, B is correct

Answer:

The answer is B, I hope this helps.

Answer:

0.4 M

Explanation:

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The stream has a mass flow rate of 1.666 g/sec and a volumetric flow rate of 1.666 ml/sec.

The dimensionless quantity mass is used to represent the amount of matter contained in a particle or object (symbolized m). The kilogram is the chosen unit of mass according to the International System (SI) (kg).

The following equation can be used to determine mass = volume * density. It is possible to gauge the gravitational force acting on a mass by determining its weight. The Newton (N) is the SI unit of weight (N).

t= 30 sec

V= 50ml

Volumetric flow rate = V/t

                                  = 50ml/30sec

                                  = 1.666 ml/sec

We know density of water= 1g/cm³

                                           = 1 g/ml

So, mass flow rate = V/t

                                = 1g/ml * 50ml/30sec

                                 = 1.666 g/sec.

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Answer:

C. Mass and volume

Explanation:

All three chemical elements found on the periodic table will for sure have which of these two characteristics: C. mass and volume.

Periodic table can be defined as an organized tabular array of all the chemical elements arranged in order of increasing atomic number (number of protons), in rows.

A chemical element can be defined as a pure substance that comprises atoms having the same atomic number (number of protons) in its nuclei and as such, it is the primary constituent of matter. Also, a common characteristics for all chemical elements found on the periodic table is mass and volume.

In Chemistry, some examples of a chemical element include the following:

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Complete Question:

A student is asked to describe three random elements found on the periodic table. All three elements will FOR SURE have which of the two following characteristics?

A. similar color and texture

B. shininess and value

C. mass and volume

D. similar boiling and freezing points

The electric field strength  = 1104.31 N/C

When charged particles, including electrons, are accelerated, an electromagnetic field, also known as an EM field, is created. Electric fields surround all electrically charged particles. Particles in motion generate magnetic fields.

Electromagnetic fields can be found throughout our environment yet are undetectable to the  eye. Electric fields are created by the local accumulation of electric charges inside the atmosphere caused by thunderstorms.

diameter of rings, d = 10 cm

Distance between the rings, r = 18 cm

Charge of the rings, q = 40 nc

The electromagnetic field strength at the rings' midway is computed as follows:

E[tex]_n_e_t[/tex] = E₁ - E₂

E[tex]_n_e_t[/tex] = E₁(₊ve) - E₂(-ve)

The strength of the electric field at the center of a left ring is computed as follows;

[tex]E=\frac{k q L}{\left(R^2+L^2\right)^{3 / 2}}\\[/tex]

E = [tex]E=\frac{9 \times 10^9 \times 20 \times 10^{-9} \times 0.18}{\left(0.05^2+0.18^2\right)^{3 / 2}}[/tex]

E = 1104.31 N/C

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The total resistance of a Parallel circuit with three resistors will be one third times lesser than the resistance of the circuit with single resistor.

A resistor is a passive two-terminal electrical component used in circuits to implement electrical resistance. Resistors have a variety of purposes in electronic circuits, including lowering current flow, adjusting signal levels, dividing voltages, biassing active components, and terminating transmission lines.

High-power resistors that can generate many watts of heat instead of electrical energy can be utilized as test loads for generators, power distribution systems, and motor controls. With temperature, time, or operating voltage changes, fixed resistors’ resistances only slightly fluctuate.

Variable resistors can be utilized as force sensors, heat sensors, light sensors, volume controls, lamp dimmers, humidity sensors, and chemical activity sensors.

When two or more resistances are connected between two points and each has a different current direction, the resistances are said to be connected in parallel.

In such circuits, the branches intersect at a common location, causing the current to branch out and then recombine.

When two or more resistances are connected end to end and the same current passes sequentially through all of them, this is referred to as a series connection. The total resistance in this situation is equal to the entire number of Individual resistances included in the series combination.

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The displacement and velocity values at time, t = 8 seconds are; 11.76 and -0.545 respectively

Part A

The possible values in the table are;

Displacement;

t = 7 seconds, y = 10.02

t = 8 seconds, y = 11.01

t = 9 seconds, y = 13.5

Velocity;

t = 7 seconds, y = 0.06

t = 8 seconds, y = -0.05

t = 9 seconds, y = -1.15

The equation for interpretation which is a form of linear equation is presented as follows;

[tex]y - y_0 = \frac{y_1 - y_0}{x_1 -x_0} \times (x - x_0)[/tex]

Interpolating for the displacement at t = 8.0 seconds is as follows;

[tex]y - 10.02 = \frac{13.5 - 10.02}{9 - 7} \times (8 - 7)[/tex]

Which gives the displacement at t = 8.0 seconds as 11.76

Interpolating for the velocity at t = 8.0 seconds is as follows;

[tex]y - 0.06 = \frac{(-1.15) - 0.06}{9 - 7} \times (8 - 7)[/tex]

Which gives the velocity at t = 8.0 seconds as -0.545

The values for the displacement and velocity obtained by interpolation (11.76 and -0.545) are different from the displacement and velocity values in the table at t = 8 which are; 11.01 and -0.05 respectively

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Answer:

P = W / t         work / time = power

P = F * S / t

F = P t / S       force required

F = P / (S / t)            since given .075 meters / sec

F = 340 J/sec / .075 m/sec = 4530 J / m = 4530 Newtons

Think about a point item (or particle) that is moving horizontally while being affected by a net force that is not zero. The object's acceleration is inversely proportional to its mass and to the strength of the applied force.

Known data:

The word "force" has a specific meaning in science. At this level, calling a force a push or a pull is entirely appropriate. A force is not something an object "has in it" or that it "contains." One thing experiences a force from another. There is no distinction between living and non-living things in the concept of a force.

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The initial velocity of particle is 7.568 m/s

Given:

acceleration = a = 6.14 m/s2

time = t = 0.300 s

final velocity = v = 9.41 m/s

To Find:

initial velocity = u

Solution: Velocity is the prime indicator of the position as well as the rapidity of the object. It can be defined as the distance covered by an object in unit time.

v = u + at

u = v - at = 9.41 - 6.14*0.3

u = 7.568 m/s

Hence, the initial velocity of particle is 7.568 m/s

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The energy change when an electron in a hydrogen atom jumps from n = 2 to n = 5 is 2.028×10 −19J.

A hydrogen particle is an iota of the synthetic component hydrogen. The electrically nonpartisan particle contains a solitary decidedly charged proton and a solitary adversely charged electron bound to the core by the Coulomb force. Nuclear hydrogen comprises around 75% of the baryonic mass of the universe. A hydrogen molecule is an iota of the compound component hydrogen. The electrically unbiased iota contains a solitary decidedly charged proton and a solitary adversely charged electron bound to the core by the Coulomb force. Nuclear hydrogen is around 75% of the baryonic mass of the universe.

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A hockey puck is set in motion across a frozen pond, if friction and air resistance are ignored, zero newton force is required to keep the puck sliding at constant velocity .

The force preventing solid surfaces, fluid layers, and sliding material components from moving in the same direction is known as friction. Friction between two surfaces causes kinetic energy to be converted into thermal energy when they move in relation to one another (that is, it converts work to heat). The utilization of friction produced by rubbing pieces of wood together to start a fire serves as an example of how this attribute can have dramatic effects. When a viscous fluid is agitated, for instance, kinetic energy is transformed into thermal energy. Wear, which can result in component damage or performance degradation, is another significant effect of various types of friction. Tribology is a field of study that includes friction.

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A sheet metal screw holding a metal body panel has pierced the insulation of a power wire and is touching the copper strands, this is known as a short to ground.

A substance called insulation is used to block sound and air. Insulation is used in the walls and attic of a home to keep warm air inside and cold air outside during the winter. An example of insulation is fibreglass. noun.

Covering anything in order to prevent heat, sound, or electricity from leaving or entering; also, the state of being covered in this manner: The animal's thick coat serves as excellent insulation from the arctic cold.

Any of the aforementioned alternatives would be safer than insulating your home with small glass shards doused in formaldehyde when compared to fibreglass insulation. However, cellulose is the most secure choice available.

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Managers do the crucial duty of controlling when they create precise measuring and monitoring methods to assess how well the firm has achieved its goals.

Software that assists system administrators in monitoring their infrastructure is known as a monitoring system. These tools keep an eye on the hardware, software, and traffic of the system and raise the alarm in the event of errors or disturbances. There are several monitoring systems available, ranging from commercial software to freeware.

The monitoring system broadcasts a signal and logs information about the signal, including whether it was received, how long it took the host to receive it, whether any signal data was lost, and other details.

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The temperature when the pressure in the thermometer is 6.00 atm is T2= 30.933 K

As specified by the IUPAC since 1982, one mole of an ideal gas has a volume of 22.710947(13) litres at standard conditions of temperature and pressure (273.15 K and precisely 105 Pa).

continuous volume,

Constant = PT

P equals pressure.

temperature, or T

Then

TTtri=PPtri

PPtriTtr = 273.16 SoT

Water's triple point temperature is i.

We have provided

P =0.0630 atm

T =348 K

T = 273.16 is the triple point value.

P/Ptri

Ptri = 273.16 then.

PT= 273.16 × 0.0630/348

Ptri = 0.0494 atm.

P =0.00560 atm

Ideal gas is present here at constant volume.

Thus, PT = Constant

P2T2=P1T1

T2 = P2

T1P1=0.00560×348

=0.0630

T2= 30.933 K

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The correct toption is (C) 13

The neutral atom of aluminum possess 13 protons.

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The correct answer for the maginitude of the average velocity of the particle between t = 1.0 s and t = 4.0 s is 0.67 m/s .

The average velocity concept was used to solve this problem.First, use the figure to calculate the distance and time required.The average velocity is then calculated using the time interval and total displacement. Average velocity is a measure of displacement over time. This is also known as the average rate of change in position over time.

The average velocity is as follows:

The velocity is denoted by v = (v 2-v 1) / (t 2- t 1)

t 1 = 4 sec

t 2 = 1 sec

t2 - t1 = 4 seconds - 1 second = 3 seconds

x1 = 2 m

x 2 = 0 m

x 2- x1 = 2 m

The velocity formula is v = (x 2- x1) / (t2- t 1)

the answer = 0.67 m/s

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The total distance travelled during the vehicle's journey as found from the speed-time graph is 6.125 m

V = d / t

V = ( u + v ) / 2

V = Average Speed

d = Distance

t = Time

u = Initial velocity

v = Final velocity

During the first 0.5 s, u = 0 and v = 1 m / s.

d = ( 0 + 1 ) * 0.5 / 2

d = 0.25 m

During the next 0.5 s, u and v are equal meaning constant velocity ( V = 1 m / s ).

d = 1 * 0.5

d = 0.5 m

During the next 1 s, u = 1 m / s and v = 1.5 m / s.

d = ( 1 + 1.5 ) * 1 / 2

d = 1.25 m

During the next 2.5 s, u and v are equal meaning constant velocity ( V = 1.5 m / s ).

d = 1.5 * 2.5

d = 3.75 m

During the next 0.5 s, u = 1.5 m / s and v = 0.

d = ( 1.5 + 0 ) * 0.5 / 2

d = 0.375 m

Total distance travelled is the sum of all the individual distances calculated.

Total distance travelled = 0.25 + 0.5 + 1.25 + 3.75 + 0.375

Total distance travelled = 6.125 m

Therefore, the total distance travelled during the vehicle's journey as found from the speed-time graph is 6.125 m

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The correct option is (b) 1.25

The CPI of the project is 1.25. Earned Value (EV) is divided by Actual Cost (AC) to determine CPI.

CPI is calculated as follows: EV / AC. In this case, 250 / 200 = 1.25.

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A solar eclipse when the moon is at its far end of orbit, leaving a ring of light around the black circle of the moon is called a ring of fire.

When the moon passes in front of the sun and casts a shadow on Earth, there is a solar eclipse. Only during the new moon phase, when the moon travels squarely between the sun and Earth and casts shadows on its surface, can a solar eclipse occur.

The North and South Poles are unable to view total solar eclipses. Solar eclipses that are nearly identical occur every 18 years and 11 months. There can be two to five solar eclipses per year, depending on the Sun, Moon, and Earth's geometry. One to two years can pass between complete solar eclipses.

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The change in distance of the armadillo is 33 m and the velocity of armadillo is 0.99 m / s

We know that,

v = Δx / t

Δx = [tex]x_{2}[/tex] - [tex]x_{1}[/tex]

where,

Δx = Change in distance

v = Velocity

t = Time

[tex]x_{2}[/tex] = Final position

[tex]x_{1}[/tex] = Initial position

Given that,

[tex]x_{2}[/tex] = 56 m

[tex]x_{1}[/tex] = 23 m

t = 33.4 s

Δx = 56 - 23 = 33 m

v = 33 / 33.4

v = 0.99 m / s

Change is distance is the amount of distance between initial and final positions. It is denoted using Δx.

Therefore, the change in distance of the armadillo is 33 m and the velocity of armadillo is 0.99 m / s

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Both balls soon after they left her palm experienced the same amount of acceleration, but in opposite directions.

We define acceleration a as the rate of change of velocity with respect to time for linear motion:

a = dv/dt = d²x/dt²

According to Newton's second law, a force F is required to accelerate a mass m:

F= ma

The forces exerted on the ball govern its acceleration. There is just one force acting on both balls at the moment they are released from the student's hand: gravity. Therefore, the amount and direction of the acceleration of both balls are the same:

F = mg with,

|g| = 9.81 m/s², pointing straight down.

Both balls soon after they left her palm experienced the same amount of acceleration, but in opposite directions.

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The depth of oil is 43 m

We know that

P = ρ g h

where,

P = Pressure of fluid

ρ = Density of fluid

g = Acceleration due to gravity

h = Depth of fluid

Given that,

P = 46 psig = 3.2 * [tex]10^{5}[/tex] N / [tex]m^{2}[/tex]

s = 0.75

ρ = 0.75 * 1000 = 750 kg / [tex]m^{3}[/tex]

g = 9.81 m / [tex]s^{2}[/tex]

Here we round the value of g = 10 m / [tex]s^{2}[/tex]

h = P / ρ g

h = ( 3.2 * [tex]10^{5}[/tex] ) / ( 750 * 10 ) = 42.67 m

h = 43 m

Fluid pressure is the measurement of force per unit area that acts on an object in the fluid.

Therefore, the depth of oil is 43 m

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The four main states of matter are Solids, liquids, gases and plasma and the fifth one is  man-made Bose-Einstein condensates.

The state of the substance is one of the characteristic forms that the many phases of the matter take. The four states of matter that can be encountered in daily life are solid, liquid, gas, and plasma. It is believed that many other states can only be found in extremely cold or dense matter, including the Bose-Einstein condensate and neutron degenerate matter. Quark-gluon plasmas are among the other conceivable states that are currently thought to be hypothetical.

The states that can exist inside the gadget are gaseous, liquid, or solid. A solid can be identified by its hard form, strong atomic bonds, and high viscosity. Insofar as they have a three-dimensional periodic atomic structure, most solids are crystalline; nevertheless, some solids (like glass) lack this periodic arrangement and are non-crystalline or amorphous instead.

According to the question,

The solid is densely packed with particles. The forces between the particles are so strong that they are only able to vibrate and not move freely. The solid as a result has a steady, distinct shape as well as a specific volume.

A liquid is a nearly incompressible fluid with a constant volume regardless of the pressure that adapts to the shape of its container. If both temperature and pressure are constant, volume is defined. When a solid is heated over its melting point, it turns liquid because the pressure exceeds the material's triple point.

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In essence, yes. Despite the fact that the majority of people believe software architecture and design to be distinct.

A system's architecture outlines its main parts, their connections (structures), and how they work together. There are several contributing variables to software architecture and design, including business strategy, quality attributes, human dynamics, design, and IT environment.

Software Architecture and Software Design can be divided into two separate stages: Software Architecture and Software Design. The functional needs in architecture cast and separate nonfunctional considerations. Functional needs are fulfilled in design.

A system's architecture acts as a blueprint. It establishes a communication and coordination mechanism among components and offers an abstraction to control the complexity of the system.

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The greater the height of a ramp, the shorter the time it takes for an object to move down the ramp.

The greater the amount of salt, the In addition the larger the longer it takes water to boil.

An increase in volume of water increases the time it takes to boil and vice versa.

Increase in the length of the paper airplane, the farther it will fly.

Jumping Jack increases the heart rate.

A ramp is an inclined plane which is a form of simple machine that is used to lift heavy objects off the floor or to lower heavy objects down.

The greater the height of a ramp, the shorter the time it takes for an object to move down the ramp due to increased acceleration.

The addition of solutes to pure solvent raises the boiling point of the solute.

Therefore, the greater the amount of salt, the In addition the larger the longer it takes water to boil.

The mass of water increases with increase in volume of water.

Therefore, an increase in volume of water increases the time it takes to boil and vice versa.

For a paper airplane the larger its wings, the greater the lift generated.

The greater the lift, the farther the paper airplane will fly.

Therefore, an increase in the length of the paper airplane, the farther it will fly.

Exercise increases the heart rate.

Jumping jack is a for of exercise. Therefore, Jumping Jack increases the heart rate.

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This means the object is increasing its velocity by 7.0 m/s in every second.

Acceleration: the rate at which the speed and direction of a moving object vary over time. A point or object going straight ahead is accelerated when it accelerates or decelerates. Even if the speed is constant, motion on a circle accelerates because the direction is always shifting.

The meter per second per second (m/s2) unit of acceleration. The square meter is a measure of area (m2). The equation a = v/t denotes acceleration (a), which is the change in velocity (v) over the change in time (t).

This enables you to calculate the change in velocity in meters per second squared (m/s2). Since acceleration is a vector quantity, both its magnitude and its direction are included.

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Ernest rutherford was a prominent scientist who contributed significantly to the theory of atomic structure.  Yes, the following statement is true.

Ernest Rutherford is considered one of the greatest scientists and experimentalists who worked on the atomic model and is also known for his contribution to nuclear physics.

he discovered that an atom is composed of three fundamental particles i.e. electrons, protons, and neutrons.

Most of the spaces are empty in an atom while its all mass is confined in a dense positively charged area called the nucleus.

Moreover, he also discovered alpha and beta radiations emitting from uranium.

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The direction of acceleration experienced by a rider will be toward the center of the circle.

Centripetal acceleration is the acceleration experience by a body moving in a circular path which is always toward the center of the circle.

Centripetal acceleration a = v² / r

Given that swings of the amusement park rotate with a constant speed. The velocity of the swing will not be constant because of the different directions the swing velocity will experience.

The direction of acceleration experienced by a rider will be centripetal acceleration which will always in the direction toward the center.

Therefore, the direction of acceleration experienced by a rider will be toward the center of the circle.

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The buoyancy force on the gold ball will be more than that of aluminum.

An upward force applied by a fluid against the weight of an item that is partially or totally submerged is known as upthrust, also known as buoyancy. Pressure in a fluid column increases with depth due to the weight of the fluid on top.

Given that two solid metal balls all have the same radius. one is made of aluminum, the other of gold. And the balls are resting at the bottom of a pool of water.

The buoyancy force at the bottom force will be calculated by finding the density of the balls.

Buoyancy force = Volume inside water x Density X g

Density of gold = 19.3 g / cc

Density of aluminium = 2.7 g / cc

Since the density of the gold ball is more than the density of the aluminum ball.

Therefore, the buoyancy force on the gold ball will be more than that of aluminum.

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