The heat transfer depicted in the image is MOST likely

For a reaction to occur, energy must be absorbed to break chemical bonds

Explanation:

Reactions can be classified as chemical reaction, nuclear reaction, thermal reaction. So in these three reaction types, the nature of energy will only be varying.

But in order to execute a reaction, there should be breaking of existing bonds and then formation of new bonds. So for breaking of the bonds of reactants, energy should be absorbed from the surrounding.

Then the extra energy will be released after forming the products. Thus, the process of absorption of energy will lead to endothermic process and the process of releasing of energy will lead to exothermic reaction. So for a reaction to occur, energy must be absorbed to break the chemical bonds.

Answer:

its velocity is 51, or 51.42 to be exact it would be: 51.4285714286

The effective resistance of many individual resistors in series is the sum of the individual resistances.

50 items in series, each with a resistance of 15 ohms, are equivalent to a single resistance of (15 x 50) = 750 ohms.

By the way . . . If one of the little bulbs in series burns out, all the others do NOT burn out. They simply get turned off and go dark, because the current can't flow through the one that did.

The total resistance of the string of fifty 15 ohm Christmas tree lights that are connected in series is 750 ohms.

The total resistance of the series resistors is determined by adding all the componenets of the resistors together.

Rt = R1 + R2 + R3 + ----

where;

Rt = 50 x (15 ohms)

Rt = 750 ohms

Thus, the total resistance of the string of fifty 15 ohm Christmas tree lights that are connected in series is 750 ohms.

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Answer:

c

Explanation:

Answer:

Now since mass of reactant is equal to mass of the product after the reaction so we can say that mass conservation is applicable here

Explanation:

As we know that zinc reacts with copper sulfate

so the reaction is given as

[tex]Zn + CuSO_4 --> ZnSO_4 + Cu[/tex]

so here we have

[tex]Zn = 10.1 g[/tex]

[tex]CuSO_4 = 18.6 g[/tex]

[tex]ZnSO_4 = 20 g[/tex]

[tex]Cu = 8.7 g[/tex]

Now total mass of reactant is given as

[tex]M_1 = 10.1 + 18.6 = 28.7 g[/tex]

Mass of the product is given as

[tex]M_2 = 20 + 8.7 = 28.7 g[/tex]

Now since mass of reactant is equal to mass of the product after the reaction so we can say that mass conservation is applicable here

Answer:True

Explanation:

if you were to swim alone and something bad happen and there was none on the beach you'd be stuck out so NEVER swim alone :)

Answer:

True

Explanation:

Answer:

25116 J

Explanation:

The amount of heat required to raise the temperature of a substance is given by the equation

[tex]Q=mC\Delta T[/tex]

where

m is the mass of hte substance

C is the specific heat capacity of the substance

[tex]\Delta T[/tex] is the change in temperature

For the sample of water in this problem, we have:

m = 0.20 kg is the mass

[tex]C=4186 J/kg^{\circ}C[/tex] is the specific heat of water

[tex]\Delta T=45-15=30^{\circ}C[/tex] is the increase in temperature

Therefore, the amount of heat required is

[tex]Q=(0.20)(4186)(30)=25116 J[/tex]

Answer:

132.43km/h

Explanation:

Velocity = displacement/time

Given

Displacement = 622.4km

Time = 4.7 hours

Therefore,

Velocity = 622.4km/4.7hrs

= 132.43km/h

Answer:

It is exerted in all directions at sea level, and this is because air molecules move in all directions.

At sea level, air pressure exerts force in all directions.

At sea level, air pressure exerts force in all directions. This force, known as atmospheric pressure, is the result of the weight of the air molecules above a given point.

Since air is a fluid, the air pressure at any location is distributed evenly in all directions, including upward, downward, and sideways.

This balanced distribution of air pressure is what helps maintain the stability of the Earth's atmosphere and is an essential factor in various weather phenomena and atmospheric dynamics.

More on air pressure can be found here: https://brainly.com/question/15189000

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Answer:

b.

[tex]0.45J/g\textdegree C[/tex]

Explanation:

Specific heat capacity is the amount of heat required to raise one gram of substance by one degree celcius.

It's calculated by the formula:[tex]s=\frac{q}{m\bigtriangleup T}[/tex], where q=heat and m= mass

[tex]\bigtriangleup T=20-0=20\textdegree C\\q=1004J\\m=111.6g[/tex]

Therefore:

[tex]s=\frac{1004J}{111.6g\times20\textdegree C}\\=0.45J/g\textdegree C[/tex]

Hence the iron's specific heat capacity is [tex]0.45J/g\textdegree C[/tex]

Answer:

Yes they do

Explanation:

All waves (both transverse and longitudinal) transfer energy from one point to another.

(e.g think about sound waves (longitudinal) and light waves (transverse))

Answer:

0 J

Explanation:

The mechanical energy of a spring is given by [tex]0.5kx^{2}[/tex] where k is spring constant and x is extension of spring. Since the spring is unstretched,  its extension is zero.

#Notice that the potential energy is 0.

-Substituting spring constant,  k with 8 and extension with zero then the mechanical energy will be

[tex]0.5\times 8\times 0^{2}=0 J[/tex]

Answer:

The correct answers are "chemical energy into electrical energy" and then "the electrical energy into light energy". Explanation: In the battery-powered flashlight, the battery supplies the chemical energy which makes the electrons to flow in the circuit and constitutes the current

Explanation:

Answer: 6m/s²

Explanation:

Acceleration = change in velocity / time

Initial velocity = 4m/s

Final velocity = 22m/s

Time = 3s

Acceleration = (22 - 4) / 3

a = 18 / 3 = 6m/s²

Answer:

When a particle or a system of particles move in a system where no external force acts, then the total linear momentum of the particle system remains constant.

Explanation:

Given data:

Total mass of the skateboarder, [tex]m_{1} = 70 \ kg[/tex]

Mass of the friend, [tex]m_{2} = 50 \ kg[/tex]

Initial velocity of the skateboarder, [tex]u_{1} = 3 \ m/s[/tex]

Initial velocity of the the friend, [tex]u_{2} = 0[/tex]

Let the new velocity of the skateboarder when his friend jumps be [tex]v[/tex].

From the conservation law of linear momentum,

[tex]m_{1}u_{1} + m_{2}u_{2} = (m_{1} + m_{2})v[/tex]

[tex]70 \times 3 + 50 \times 0 = (70 + 50)v[/tex]

[tex]\Rightarrow \ v &= 1.75 \ m/s.[/tex]

Answer:

O strong

Explanation:

From the diagram, we are dealing with strong forces.

Strong forces are one of the four fundamental forces found in nature. The other forces are gravitational forces, electromagnetism and weak interactions.

Answer:

Strong

Explanation:

Answer:

final velocity = 3504 m/s  

Explanation:

Given data:

velocity of missile = Vi = 1350m/s

angle at which missile is moving = 25degree

distance between missile and targets = 23500m

angle between target and missile=55degree

time=10.2s

To find:

Final velocity: ?

Formula:

x = Vx*t + ½*ax*t²  

Let x be the horizontal component of distance

x = ertical component of distance

t-time

ax = horizontal component of acceleration

ay = Vertical component of acceleration

Vx = horizontal component of velocity

Vy = Vertical component of velocity

Solution:

x = Vx*t + ½*ax*t²

23500m * cos55.0º = 1350m/s * cos25.0º * 10.20s + ½ * ax * (10.20s)²  

ax = 19.2 m/s²  

V'x = Vx + ax*t = 1350m/s * cos25.0º + 19.2m/s² * 10.20s = 1419 m/s  

similarly vertically:

y = Vy*t + ½*ay*t² 

23500m * sin55.0º = 1350m/s * sin25.0º * 10.20s + ½ * ay * (10.20s)²  

ay = 258 m/s²  

V'y = Vy + ay*t

     = 1350m/s * sin25.0º + 258m/s² * 10.20s = 3204 m/s  

V = √(V'x² + V'y²)

   = 3504 m/s  

The Acceleration of  slug  would be 2 mm/hr²

Step by step Explanation:

Given of the solution

Initial velocity of the slug,(we can represent as [tex]v_{i}[/tex])  [tex]v_{i}[/tex]= 3 mm/hr

Final velocity of the slug,(we can represent as [tex]v_{f}[/tex] ) [tex]v_{f}[/tex]= 5 mm/hr

Time, t = 1 hr

Acceleration, a = ?

We know,

[tex]a = \frac{(5-3)}{1} \\\\a = 2 mm/hr^2[/tex]

Therefore, The Acceleration of  slug would be 2 mm/hr²

Answer:

78.4 J

Explanation:

The gravitational potential energy of an object is the energy possessed by the object due to its location in the gravitational field.

The change in gravitational potential energy of an object is given by:

[tex]\Delta U=mg\Delta h[/tex]

where:

m is the mass of the object

[tex]g=9.8 m/s^2[/tex] is the acceleration due to gravity

[tex]\Delta h[/tex] is the change in height of the object

For the mass in  this problem, we have:

m = 2 kg is the mass

[tex]\Delta h = 4 m[/tex] is the change in height

So, its change in gravitational energy is:

[tex]\Delta U=(2)(9.8)(4)=78.4 J[/tex]

When a plastic lid is sprinkled with iron filings is placed over a magnet then a pattern is formed. The iron fillings arrange themselves in a way how magnetic field is present. The force of the magnet is the strongest at the two ends because more iron particles are concentrated in these areas. The magnetic lines of flux flow from one end to the other.

Answer:

[tex]41.3 m/s^2[/tex]

Explanation:

The acceleration of an object is the rate of  change of the velocity of the object.

It is a vector quantity, so it has a magnitude and a direction.

The acceleration is given by:

[tex]a=\frac{v_f-v_i}{t}[/tex]

where

[tex]v_f[/tex] is the final velocity

[tex]v_i[/tex] is the initial velocity

t is the time taken for the velocity to change

If the acceleration is positive, the direction is the same as the initial velocity; if the acceleration is negative, the direction is opposite to the initial velocity.

In this problem:

[tex]v_i=0[/tex] is the initial velocity

[tex]v_f=124 m/s[/tex] is the final velocity

t = 3 s is the  time

So, the acceleration is

[tex]a=\frac{124-0}{3}=41.3 m/s^2[/tex]

agitate... hope this helps.......

In Chemistry, to accelerate a reaction often involves using a catalyst to increase the reaction rate without the catalyst being consumed. Acceleration in Physics refers to a change in an object's velocity, as described by Newton's first law of motion.

The term 'to accelerate' typically implies speeding up any process or reaction. In the context of Chemistry, this often refers to increasing the rate at which a chemical reaction occurs. Factors that can accelerate a reaction include stirring, increasing temperature, or adding a catalyst. A catalyst is a substance that increases the speed of a reaction without being consumed in the process. Acceleration, specifically in Physics, is defined as the change in velocity - which can be in the magnitude or direction or both. Newton's first law of motion, also known as the law of inertia, states that a body at rest remains at rest, and a body in motion remains in motion at a constant velocity unless acted upon by a net external force — implying the role of acceleration when this state is altered.

answer: 340 m/s

explanation: in this instance, the sound wave travels 340 meters in 1 second, so the speed of the wave is 340 m/s. remember, when there is a reflection, the wave doubles its distance. in other words, the distance traveled by the sound wave in 1 second is equivalent to the 170 meters down to the canyon wall plus the 170 meters back from the canyon wall.

The speed of the wave is 340 m/s. It can be calculated by dividing distance by time.

Given:

Distance = 170 meters

Time = 1 Seconds

It is defined as the ratio between distance and time.

Speed = Distance /  Time

In this instance, The sound wave travels 340 meters in 1 second, So the speed of the wave is 340 m/s.

When there is a reflection, the wave doubles its distance. In other words, the distance traveled by the sound wave in 1 second is equivalent to  170 meters down to the canyon wall plus 170 meters back from the canyon wall.

Thus, the speed of the wave is 340 m/s.

Find more information about the Speed of waves here:

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-- A change in speed can be either speeding up or slowing down. These effects can be caused by the gas pedal or the brake pedal.

-- Velocity is made of the car's speed and direction. These can be changed by the gas pedal, the brake pedal, or the steering wheel.

Final answer:

The two controls causing a change in car speed are the accelerator and brakes. For velocity, any change in speed or direction (affected by the accelerator and steering wheel) can alter it. An odometer measures distance traveled, while a speedometer measures instantaneous speed.

Explanation:

The two controls on a car that cause a change in speed are the accelerator (gas pedal) and the brakes. Pressing the accelerator increases the car's speed, while applying the brakes decreases it. The control that causes a change in velocity is both the accelerator and the steering wheel. This is because velocity includes both speed and direction. Thus, pressing the accelerator affects speed, which is a part of velocity, and turning the steering wheel alters the direction of the car's velocity.

Velocity is defined by both speed, which is a scalar quantity, and direction, a vector quantity. Changing either of these two or both simultaneously, results in a change in velocity. Acceleration, therefore, refers to the rate at which velocity changes over time and can occur due to a change in speed, direction, or both. For example, when a car moves from left to right at a constant velocity and the accelerator is pressed, both the velocity and acceleration vectors point rightwards. However, if the brakes are applied while the car is still moving to the right, the velocity remains directed to the right but the acceleration vector points to the left, indicating deceleration.

The car's odometer measures the total distance traveled, which is a scalar quantity, while the speedometer measures the instantaneous speed of the car, also a scalar. To illustrate the difference between average speed and the magnitude of average velocity consider a car trip where the car moves in a circle and returns to its starting point. The average speed is the total distance traveled divided by the elapsed time, whereas the magnitude of average velocity would be zero since displacement is zero after completing the loop. The two quantities are the same if the car travels in a straight line without changing direction.

Answer:

Newton

Explanation:

Newton is the correct unit for a force

Answer:25N/M^2

Explanation:

Force=20N Area=0.8M^2

Stress=force/area

Stress=20/0.8

Stress=25N/M^2

Answer: 4575N

Explanation:

For y component, W = mgcosø

W = 500×9.8cos21

W = 4574.54N

Find the diagram in the attached file

Answer:

-45.745

Explanation:

negative because it is downward

Answer:

-16 kg m/s

Explanation:

Momentum is a vector quantity indicating the "amount of motion" in an object.

The change in momentum of an object is given by:

[tex]\Delta p = m(v-u)[/tex]

where:

m is the mass of the object

u is its initial velocity

v is its final velocity

For the water balloon in this problem, we have:

m = 0.50 kg is the mass

u = 32 m/s is the initial velocity

v = 0 m/s (since the balloon comes to a stop)

Therefore, the change in momentum is:

[tex]\Delta p=(0.50)(0-32)=-16 kg m/s[/tex]

And the negative sign indicates that the direction is opposite to the initial velocity.