true/false. a bonding operation utilizes a laser to provide a constant heat flux

Explanation:

Consumerism is a social and economic order that encourages the purchase of goods and services in ever-greater amounts. ... In economics, consumerism refers to economic policies placing emphasis on consumption.

Katy slows from 6.7 m/s to 2.3 m/s in 2.2 seconds. The acceleration will be 2 \(m/s^{2}\)

initial speed = 6.7 m/s

final speed = 2.3 m/s

time = 2.2 seconds

acceleration = change in speed / time interval

                      = 2.3 - 6.7 / 2.2

                      = -2 \(m/s^{2}\)

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Answer:

7revolutions

Explanation:

Given parameters:

Initial revolution  = 250rpm

Final revolution  = 150rpm

Time  = 4.2s

Unknown:

Number of revolutions that occur at this time = ?

Solution:

To solve this problem;

 let us find the change in revolution  = 250rpm - 150rpm  = 100rpm

Convert the time to seconds;

         60s makes 1 minute

        4.2s will make \(\frac{4.2}{60}\)   = 0.07min

So;

      The number of revolutions at this time  = 100rpm x 0.07min

         =   7revolutions

Explanation:

GIVEN DATA

since P(momentum)=Mass×Velocity

F = P2 -P1

t

F= Mv2-Mv1

t

F=M( v2-v1) ,(a=v2-v1)

t t

ANSWER EXPLANATION IN WORDS

That question is related to Newton's second law of motion, the question ask you to find the force it gives you a mass and a acceleration As we know that the SI unit of acceleration is newton per kilogram or metre per second square It is correct to write metre per second square instead of Newton Per kilogram because because all of them are the SI unit of acceleration so that is the answer we get 686 Newton by Force .

The horizontal displacement of the stunt diver from the base of the cliff is 33.9 m

The time of motion of an object is the time taken for the object to travel from its initial position to the final position.

The time taken for the stunt diver to travel down the given height is calculated as follows;

h = vt + ¹/₂gt²

where;

h = ¹/₂gt²

2h = gt²

t² = 2h/g

t = √(2h/g)

t = √(2 x 13 / 9.8)

t = 1.63 seconds

The horizontal distance travelled by the stunt diver is calculated as follows;

X = Vₓt

where;

X = 20 .8 m/s  x  1.63 s

X = 33.9 m

Thus, the displacement of the stunt diver from the base of the cliff is 33.9 m.

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The voltage across each bulb will be 12v.

Voltage is an electrical potential difference between two points, measured in volts (V). It is the energy that drives the flow of electricity through an electrical circuit.

The current through each bulb will be the same. This is because when electrical components are connected in series, the same amount of current flows through each component. This is because the total voltage across the series is divided equally amongst each component. The current will be determined by the resistance of the components, so if all bulbs have the same resistance, the current will be the same for all of them.

In a series circuit, the total resistance is equal to the sum of the individual resistances. This means that if the resistance of each bulb is the same, the total resistance of the series will be three times the resistance of one bulb. The current through the circuit is determined by the applied voltage and the total resistance. Since the resistance of the series is three times the resistance of a single bulb, the current will be three times the current of a single bulb.

In conclusion, when three identical bulbs are connected in series across a 12v battery, the voltage across each bulb will be 12v and the current and power will be the same for each bulb. This is due to the fact that the voltage is divided equally among the components in series and the total resistance of the series is three times the resistance of a single bulb.

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Answer:

OA. . review all safety procedures and the lab activity procedure

Explanation:

Answer:

NO

Explanation:

if it has no acceleration then it's not moving

Answer:

Yes when the velocity is constant then the acceleration is said to be zero. Thus an object with 0 acceleration can be in motion.

Let me give you an example to make you more clear

Example:

When  a car is  traveling at a constant 90 km/h in a straight line has nonzero velocity and zero acceleration.

The required amount of heat in joules taken to raise the temperature of a 100 g piece of copper from 18°C to 35°C is calculated to be 654.5 joules.

The specific heat of copper is given as 0.385 J/g.°C.

Mass of copper m is given as 100 g.

The initial temperature is 18°C.

The final temperature is 35°C.

The relation for heat when mass of substance and its rise in temperature is specified is,

q = m c Δt

where,

q is heat

m is mass

c is specific heat of the substance

Δt is rise in temperature

So, let us put the known values into the equation,

q = m c Δt = 100(0.385)(17) = 654.5 J

Thus, the required heat is calculated to be 654.5 J.

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Answer:Comparison of the embryological development of different species also reveals similarities that show relationships not evident in the fully-formed anatomy.

Explanation:

Comparison of the embryological development of different species also reveals similarities that show relationships not evident in the fully-formed anatomy.

(Have a great day :D)

The total magnification of a specimen viewed through the ocular and oil immersion lens on a light microscope can be calculated by multiplying the magnification of the ocular lens (usually 10x) by the magnification of the oil immersion objective lens (typically 100x). In this case, the total magnification would be 10x * 100x = 1000x.

The total magnification of a specimen when viewed through the ocular and oil immersion lens on a light microscope can vary depending on the specific lenses used. However, a common total magnification for this combination is around 1000x. This is because the ocular lens typically has a magnification of 10x, while the oil immersion lens can have a magnification of 100x. When these two lenses are used together, the total magnification is calculated by multiplying their magnifications, resulting in a total magnification of 1000x.

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The total current flowing through the 270 W and 150 W resistors is 3.34 A.

1: Find the equivalent resistance of the parallel circuit

We know that resistors in parallel have an equivalent resistance that can be calculated using the formula: 1/Req = 1/R1 + 1/R2 + 1/R3

where R1, R2, and R3 are the resistances of the three parallel resistors.

Substituting the values given:

1/Req = 1/270 + 1/150 + 1/220

1/Req = 0.00695652174

Req = 1/0.00695652174

Req = 143.64 Ω

Therefore, the equivalent resistance of the parallel circuit is 143.64 Ω.

2: Calculate the total current

To calculate the total current flowing through the 270 W and 150 W resistors, we can use the same formula, I = V/R, but substitute the equivalent resistance for the total resistance.

I = V/Req

I = 480/143.64I = 3.34 A

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The centripetal acceleration of the aorta in which the blood travels with the speed of 0.30 m/s is 2.2 m/s²

The diameter of the aorta = 4.1 cm

                                           = 4.1 x 10⁻² m

The speed of the blood through the aorta = 0.3 m/s

The centripetal acceleration of the blood passing through the aorta can be found using the formula,

                     a = v²/r

where a is the centripetal acceleration

           v is the speed of the blood passing through the aorta

           r is the diameter of the aorta

Let us substitute the known values in the above equation, we get

         a = 0.30² / (4.1 x 10⁻²)

            = 0.09 /  (4.1 x 10⁻²)

            = 0.022 x 10²

            = 2.2 m/s²

Therefore, the centripetal acceleration of the aorta is 2.2 m/s²

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Answer:

F = -K x = 15 kN/m " .05 m = .75 kN = 750 N

W = 1/2 K X^2        original potential energy of block

W = 1/2 * 15 Kn/m * .0025 m^2 = 18.75 J

One cannot calculate speed of block without knowing mass of block.

An unmanned spacecraft leaves for Venus. The statements, The weight of the spacecraft keeps changing and The mass of the spacecraft remains the same. This 2 statements A and D are true.

A spaceship is a machine or vehicle built to travel through space. Spacecraft are a form of artificial satellite utilised for a wide range of tasks, such as communications, Earth observation, meteorology, navigation, space colonisation, planetary exploration, and freight and person transfer. All spacecraft, with the exception of single-stage-to-orbit vehicles, need a launch vehicle (carrier rocket) to get into space.

A spacecraft that is performing a sub-orbital spaceflight launches into space and then lands without gaining enough momentum or energy to complete a full orbit of the Earth. Spacecraft enter confined orbits around the Earth or other celestial bodies for orbital spaceflights. Only humans are carried on human spacecraft either as crew or guests from launch or while in orbit (space stations).

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Answer:

At 23.5 deg north of the equator this person would see the sun directly overhead at the summer solstice at noon

Answer: 2 m/s to the right

Explanation:

This is a conservation of momentum question:

p before = p after → m1v1 + m2v2 = m3v3 + m4v4

**Note- if the speed is to the left, plug in a negative v!

5(2) + 3(-3) = 5(-1) + 3(v4) → 1 = -5 + 3v4 → v4 = +2 m/s :)

Answer:

a) Vf = 13.87[m/s]

b) t = 1 [s]

Explanation:

a)

To solve this problem we can use kinematics equations:

\(v_{f}^{2}= v_{i}^{2}+(2*g*h)\)

where:

Vf = final velocity [m/s]

Vi = initial velocity = 4 [m/s]

h = elevation = 9 [m]

g = gravity acceleration = 9.81 [m/s^2]

\(v_{f}=\sqrt{(4)^{2} +(2*9.81*9)}\\v_{f}=13.87[m/s]\)

b)

Now using the next equation we can find the time

\(v_{f}=v_{i} +(g*t) \\t = (13.87-4)/9.81\\t=1[s]\)

Answer:

it is B

Explanation:

Answer:

CO and H20

Explanation:

To calculate the total price of natural gas for the month, we need to multiply the number of therms charged at the baseline rate by the baseline rate and the number of therms charged at the over baseline rate by the over baseline rate, and then add these two amounts together.

So, the total cost of natural gas for the month is:

49 therms x $0.74/therm + 25 therms x $0.98/therm

=  $36.26 + $24.50 = $60.76

Therefore, the total price of natural gas for the month was $60.76.

To calculate the therms per capita, we need to divide the total number of therms used by the number of people living in Mrs. Schertz's home.

So, the therms per capita is:

74 therms / 4 people = 18.5 therms/person

Therefore, the therms per capita for Mrs. Schertz's household is 18.5 therms per person.

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Answer:

6.9 m/s

Explanation:

The Earth has four main interconnected systems: the atmosphere, the hydrosphere, the lithosphere, and the biosphere.

The model shows how all four systems interact with each other and influence each other. The atmosphere is responsible for controlling the climate and transferring energy through air currents and radiation. The hydrosphere includes all water on Earth, both frozen and liquid, and it is responsible for transporting water and energy. The lithosphere is made up of rocks, soil, and minerals, and it helps regulate and moderate the Earth's temperature. Finally, the biosphere is made up of all living things, and it influences and is influenced by all of the other systems.

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Answer:

D.

Explanation:

all of the options are true.

Answer: Im sure its 1/A

Explanation:.

The pendulum's new time period is T.

A bob suspended at the end of a thread that is so light as to be regarded massless makes up a simple pendulum. It serves as an example of a conservative oscillatory system. A point mass m anchored to one end of a massless rod of length L makes up this idealized representation of a pendulum.

The time period of a simple pendulum is calculated by the formula, \(T=2\pi\sqrt{\frac{L}{g}}\) where T is the time period, L is the length of the pendulum, and g is the acceleration due to gravity. Since this formula is independent of mass, the change in the mass of the bob doesn't affect the time period. Therefore, the new time period will still be T. There is no change.

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The centre of mass of the region is bounded by y=9-x^2 y=5/2x, and the z-axis is (3.5, 33/8). Formulae used to find the centre of mass are as follows:x bar = (1/M)*∫∫∫x*dV, where M is the total mass of the system y bar = (1/M)*∫∫∫y*dVwhere M is the total mass of the system z bar = (1/M)*∫∫∫z*dV, where M is the total mass of the systemThe region bounded by y=9-x^2 and y=5/2x, and the z-axis is shown in the attached figure.

The two curves intersect at (-3, 15/2) and (3, 15/2). Thus, the total mass of the region is given by M = ∫∫ρ*dA, where ρ = density. We can assume ρ = 1 since no density is given.M = ∫[5/2x, 9-x^2]∫[0, x^2+5/2x]dAy bar = (1/M)*∫∫∫y*dVTherefore,y bar = (1/M)*∫[5/2x, 9-x^2]∫[0, x^2+5/2x]y*dA= (1/M)*∫[5/2x, 9-x^2]∫[0, x^2+5/2x]ydA...[1].

The limits of integration in the above equation are from 5/2x to 9-x^2 for x and from 0 to x^2+5/2x for y.To evaluate the above integral, we need to swap the order of integration. Therefore,y bar = (1/M)*∫[0, 3]∫[5/2, (9-y)^0.5]y*dxdy...[2].

The limits of integration in the above equation are from 0 to 3 for y and from 5/2 to (9-y)^0.5 for x.Substituting the values and evaluating the integral, we get y bar = (1/M)*[(9-5/2)^2/2 - (9-(15/2))^2/2]= (1/M)*(25/2)...[3].

Also, the x coordinate of the center of mass is given by,x bar = (1/M)*∫∫∫x*dVTherefore,x bar = (1/M)*∫[5/2x, 9-x^2]∫[0, x^2+5/2x]x*dA= (1/M)*∫[5/2x, 9-x^2]∫[0, x^2+5/2x]xdA...[4].

The limits of integration in the above equation are from 5/2x to 9-x^2 for x and from 0 to x^2+5/2x for y.To evaluate the above integral, we need to swap the order of integration. Therefore, x bar = (1/M)*∫[0, 3]∫[5/2, (9-y)^0.5]xy*dxdy...[5].

The limits of integration in the above equation are from 0 to 3 for y and from 5/2 to (9-y)^0.5 for x.

Substituting the values and evaluating the integral, we get x bar = (1/M)*[63/8]= (1/M)*(63/8)...[6]Thus, the centre of mass of the region is bounded by y=9-x^2 y=5/2x, and the z-axis is (3.5, 33/8).

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The period of the spring is 0.902 s. This means it will take this long for the spring to return to its equilibrium position after it is stretched an additional 0.140 m.

Equilibrium is a state of balance between opposing forces in which no net change is occurring. It is a dynamic process resulting from the interaction of multiple elements in a system, creating a balance that prevents any of the elements from becoming dominant.

The period of a spring is determined by the mass, spring constant and initial displacement from equilibrium. The period is calculated using the formula:
T = 2π√(m/k)
Where m is the mass and k is the spring constant.
In this case, the mass is 2.30 kg, the spring constant is unknown and the initial displacement is 0.350 m.
To calculate the period of the spring, we first need to calculate the spring constant. We can do this using Hooke's Law:
F = kx
Where F is the force, k is the spring constant and x is the displacement.
In this case, the force is the weight of the mass, which is the mass multiplied by the acceleration due to gravity (9.81 m/s2).
F = 2.30kg * 9.81m/s2 = 22.553 N
Now we can calculate the spring constant.
k = F/x = 22.553 N / 0.350 m = 64.7 N/m
Now that we have the spring constant, we can calculate the period of the spring.
\(T = 2\pi\sqrt{(m/k}) = 2\pi(2.3kg/64.7N/m) = 0.902 s\)The period of the spring is 0.902 s. This means it will take this long for the spring to return to its equilibrium position after it is stretched an additional 0.140 m.

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In the "equal and opposite" Newton's Third Law, reaction force to a bat hitting a ball is the B. ball putting equal force on the bat.

According to Newton's Third Law of Motion, for every action, there is an equal and opposite reaction. When a bat hits a ball, the bat exerts a force on the ball, and in return, the ball exerts an equal and opposite force on the bat. This means that the force of the ball pushing back on the bat is just as strong as the force of the bat hitting the ball. Therefore, the correct answer is that the ball puts an equal force on the bat.

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