a chef is testing out a new iron cookware. He knows that iron specific heat of 445 j/kg Celsius. he heats a 2kg iron pan on a stove for 5 minutes and finds that the temperature of the iron skillet has increased by 150 degrees Celsius. calculate the amount of heat energy absorbed by the pan.

To find the current in the resistor, we can use Ohm's Law and the concept of equivalent resistance. Thus, option A is correct.

First, let's calculate the equivalent resistance of the three cells connected in parallel. When resistors are connected in parallel, the reciprocal of the equivalent resistance is equal to the sum of the reciprocals of the individual resistances:

1/Req = 1/R1 + 1/R2 + 1/R3

Given that R1 = R2 = R3 = 22 Ω (internal resistance of each cell), we can substitute the values:

1/Req = 1/22 + 1/22 + 1/22

1/Req = 3/22

Taking the reciprocal of both sides, we find:

Req = 22/3 Ω

Now we can use Ohm's Law to calculate the current (I) in the resistor. Ohm's Law states that the current flowing through a resistor is equal to the voltage across it divided by its resistance:

I = V/R

Given that V = 1.1 V (emf of each cell) and R = 32 Ω (resistance), we can substitute the values:

I = 1.1/32

Calculating this value, we find:

I ≈ 0.034375 A

Therefore, the current in the resistor is approximately 0.034375 A.

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This is true because the process of dry ice sublimating and the puddle freezing both involve chemical bonds breaking.

In the case of dry ice (solid CO2), the sublimation process occurs when the CO2 molecules absorb enough energy to break the bonds holding them together in a solid state. This energy is supplied by the surrounding air, causing the CO2 to transition directly from a solid to a gas.

In the case of the puddle freezing, the water molecules lose energy and slow down, allowing hydrogen bonds to form between the molecules. As more and more bonds form, the liquid transitions to a solid (ice). The breaking of hydrogen bonds in the liquid and the formation of new bonds in the solid are chemical processes that represent a breaking and forming of chemical bonds.

"

Complete and correct question

I dry ice sublimating and becoming a ga and a puddle freezing into ice on a clod night both involve chemical bond breaking

True or false

"

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When the elevator is descending at a constant speed, there are two forces at work on it. Both the weight of the elevator and the cable's tension are forces.

A cable-hung elevator will experience zero change in velocity if it is descending at a steady speed. The net acceleration is therefore zero. The tension force (T) applied by the cable to the elevator is pulling it upward.

The mechanical labour that moves the elevator up and down uses potential in the case of the elevator sinking. Note: The entire mechanical energy comprises a system in consideration is the sum of kinetic energy and potential energy.

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As more resistors are added in parallel across a constant voltage source, the power supplied by the source increases for a time and then starts to stabilize or decrease.

When resistors are connected in parallel, the equivalent resistance decreases. This is because the reciprocal of the equivalent resistance is the sum of the reciprocals of the individual resistances. As more resistors are added in parallel, the total resistance decreases, which causes an increase in the total current flowing from the constant voltage source according to Ohm’s Law (V = I * R). The power supplied by the source is given by the equation P = V * I, where P is the power, V is the voltage, and I is the current. As the current increases due to the decreasing equivalent resistance, the power supplied initially increases.

However, there is a limit to the power that can be supplied by the source. The power is limited by the maximum capacity of the voltage source or the components involved. As more and more resistors are added, the total current may reach a point where it exceeds the capacity of the voltage source, causing the power supplied to either stabilize or decrease. At this point, the voltage source may not be able to maintain the desired voltage or current levels, resulting in a decrease in power supplied or a limit to its increase.

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Answer:

3.710^-15 joule  is the maximum energy of the photons

voltage= 23.5 = 23500 V

q= 1.6 × 10^-19 coulombs

Energy= qV

E= 3.710^-15 joule

Energy is the ability to perform work in physics. Different shapes, such as potential, kinetic, thermal, electrical, chemical, radioactive, etc., may be assumed by it. Other instances of energy being transmitted from one body to another include heat and work. Energy is always distributed after it has been transferred in accordance with its type. Thus, heat transfer could result in thermal energy, whereas work could result in mechanical energy.

Motion is a trait shared by all forms of energy. For instance, if a body is moving, it possesses kinetic energy. Due to the object's design, which integrates potential energy, a tensioned object, such a spring or bow, has the ability to move even when at rest.

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Answer:

D. stress

Explanation:

hope this helps

Answer:

D. Stress

Explanation:

The increase along faults and leads to rock breaking would have the increase of stress from breaking a big rock

The velocity of the RC car moving 20m westward (to the left) in 5 seconds is 4 m/s, westward.

Given the following data:

To find the velocity of the RC car:

Velocity can be defined as the rate of change in displacement (distance) with time.

Also, velocity is a vector quantity and as a result of this, it has both magnitude and direction.

Mathematically, velocity is given by the formula;

\(Velocity = \frac{displacement}{time}\)

Substituting the given parameters into the formula, we have;

\(Velocity = \frac{20}{5}\)

Velocity = 4 m/s, westward.

Therefore, the velocity of the RC car is 4 m/s, westward.

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third down, chris is correct

Answer:

Detection of x-rays from a binary star undergoing mass exchange, where mass of component star can be determined.

The absorption of the waves allows to find examples for heating are:

Waves of all types carry energy, but not matter. Therefore when interacting with a material you can miss its energy.

They indicate that in this interaction the absorbed energy was transformed into thermal energy.

Case 1.

A wave of light falls on a glass of water in the sun after a while the temperature of the glass increases due to the absorption of light, this phenomenon increases if the glass is black.

Case 2.

A sound wave hits a wall if the frequency is close to resonance, the wave is absorbed and the wall can vibrate until it falls and incease your temperature.

When air is blown into a musical instrument, part of the wave energy is absorbed into the walls, which after a while heat up, this results in a change in the frequency of the sound emitted by the instruments.

In conclusion using the features absorption of waves we can find examples of heating are:

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An object is undergoing simple harmonic motion with an amplitude of 8.0 cm and a frequency of 0.34 Hz. At t = 0s, it is at its most negative position.

Simple harmonic motion (SHM) is characterized by periodic motion in which the restoring force is directly proportional to the displacement and acts in the opposite direction. The equation that describes the displacement of an object in SHM as a function of time is given by x(t) = A cos(2πft + φ), where A is the amplitude, f is the frequency, t is time, and φ is the phase constant.

In this case, the amplitude is given as 8.0 cm, indicating that the maximum displacement from the equilibrium position is 8.0 cm. The frequency is given as 0.34 Hz, representing the number of complete oscillations per second. At t = 0s, the object is at its most negative position, indicating that it is at the extreme negative displacement.

By plugging in the values into the equation, we can determine the position of the object at any given time during the simple harmonic motion. The phase constant φ is not provided, so we cannot determine the exact position at t = 0s without additional information. However, we know that it is at the most negative position, indicating a displacement of -8.0 cm from the equilibrium.

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Answer:  If one billiard ball hits another, the second will move with the same force as the first.

A child wants to jump to climb a tree (reaction), he must push the ground to propel himself (action).

A man deflates a balloon; the force with which the air comes out causes the balloon to move from one side to the other.

Explanation:

-Hitting A Wall

-Rowing a boat

-Walking

Explanation:

1.If you hit a Wall with your hands or legs, you get hurt. Why?

Because of Newton's Third Law. You hit the wall with a force and that exact same amount of force is returned by the wall.

2. While Rowing a boat, when you want to move forward on a boat, you paddle by pushing the water backwards, causing you to move forward.

3.While Walking, You push the floor or the surface you are walking on with your toes, And the surface pushes your legs up, helping you to lift your legs up.

The CG is located 99.76 inches aft of the datum.

To determine center of gravity (CG), we need to use formula:

CG = (Σ(weight x arm))/Σ(weight)

where Σ(weight x arm) is sum of  weight times arm for each component, and Σ(weight) is sum of all weights.

Weight of pilot and passengers = 380.0 lb

Arm of pilot and passengers = 64.0 in

Weight of fuel = total weight - empty weight - weight of pilot and passengers = 1875.0 - 1495.0 - 380.0 = 0 lb

Arm of fuel = 96.0 in

Calculate the CG:

CG = (1495.0 x 101.4) + (380.0 x 64.0) + (0 x 96.0) / (1495.0 + 380.0 + 0) = 99.76 in aft of datum

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The correct answer is C) A normal line is a line perpendicular to the boundary between two media. It is used in optics to determine the angle of incidence and the angle of reflection or refraction of a ray of light when it passes from one medium to another.

The normal line is an imaginary line that is drawn at a right angle to the boundary surface between the two media, and it serves as a reference point for measuring the angle of incidence and angle of reflection or refraction. Knowing the angle of incidence and angle of reflection or refraction is crucial in determining how light behaves when it passes through different media, which is important in a variety of applications such as lens design, microscopy, and optical fiber communication.

a normal line is C) A line perpendicular to the boundary between two media. A normal line is used in optics and physics to describe the line that is at a right angle (90 degrees) to the surface of the boundary separating two different media. This line is essential for understanding the behavior of light when it encounters a boundary, as it helps determine the angle of incidence and angle of refraction or reflection. So, a normal line is not parallel to the boundary, nor is it a vertical line or a line dividing rays. It is strictly perpendicular to the boundary between two media.

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To solve this problem, we can use the thin lens equation. So, the final image distance relative to the lens on the right in this two-lens system is approximately 9.57 cm.

1/f = 1/d_o + 1/d_i
where f is the focal length of the lens, d_o is the distance of the object from the lens, and d_i is the distance of the image from the lens.
First, let's consider the left-hand lens. The object is located 10.0 cm to the left of the lens, so d_o = -10.0 cm (negative because it is to the left of the lens). The focal length is 5.00 cm, so f = 5.00 cm. We can rearrange the thin lens equation to solve for d_i:
1/d_i = 1/f - 1/d_o
1/d_i = 1/5.00 - 1/-10.0
1/d_i = 0.3
d_i = 3.33 cm
So the left-hand lens produces an image that is 3.33 cm to the right of the lens.
Now, let's consider the right-hand lens. The image produced by the left-hand lens is acting as the object for the right-hand lens.

The distance between the two lenses is 25.8 cm, so the object for the right-hand lens is located 25.8 - 3.33 = 22.47 cm to the left of the right-hand lens. We can use the thin lens equation again:
1/d_i = 1/f - 1/d_o
1/d_i = 1/5.00 - 1/22.47
1/d_i = 0.176
d_i = 5.68 cm
So the final image produced by the two-lens system is located 5.68 cm to the right of the right-hand lens.
Therefore, the image distance (relative to the lens on the right) of the final image produced by this two-lens system is 5.68 cm.

Two converging lenses, a principal axis, and a 10.0 cm object distance. To find the image distance relative to the right-hand lens in this two-lens system, we'll follow these steps:
1. Calculate the image distance produced by the first (left-hand) lens using the lens equation:
1/f = 1/do + 1/di
where f is the focal length, do is the object distance, and di is the image distance.
2. Find the object distance for the second (right-hand) lens.
3. Calculate the image distance produced by the second lens using the lens equation again.
Step 1:
The left-hand lens has a focal length (f) of 5.00 cm, and the object is 10.0 cm to its left, so do = 10.0 cm. Plugging these values into the lens equation:
1/5.00 = 1/10.0 + 1/di
Solving for di, we get di = 10.0 cm for the first lens.
Step 2:
The distance between the two lenses is 25.8 cm. Since the image produced by the first lens is 10.0 cm to its right, the remaining distance to the second lens is 15.8 cm. This is the object distance (do) for the second lens.
Step 3:
Now, we use the lens equation again for the second lens with f = 5.00 cm and do = 15.8 cm:
1/5.00 = 1/15.8 + 1/di
Solving for di, we get di ≈ 9.57 cm for the second lens.
So, the final image distance relative to the lens on the right in this two-lens system is approximately 9.57 cm.

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Explanation:

Momentum = mass × Velocity

p = 62×73

p =4526

A.) The speed of Tarzan at the bottom of the swing when he starts from rest is 10.8 m/s.

B.) The speed of Tarzan at the bottom of the swing when he starts with 4 m/s is 11.6 m/s.

Let us solve this problem using law of conservation of energy. The kinetic energy at the bottom of the swing will be equal to the gravitational potential energy at the start of the motion.

U = K

m g h = 1/2 m v²

where,

m is Tarzan's mass

g is acceleration due to gravity

h is initial height

Tarzan's speed at the bottom is v

Re-arranging the equation for making v as subject, we have

v = √ (2 g h + u²)

Initial velocity u = 0.

Therefore, we must determine h, Tarzan's starting height. We know that the length of the swing is L= 30 m and it is initially inclined at θ = 37° with respect to the vertical, so the initial height of Tarzan is given by

h = L - L cosθ = L(1 - cosθ) = 30 ×(1 - cos 37 ) = 6 m

Tarzan's speed, then, at the swing's bottom is

v = √ ( 2 × 9.8 × 6) = 10.8 m/s

B.) If u = 4 m/s,

v = √ 2 g h + u² = √ [2 g L(1 - cosθ) + u²] = √ [ 2 × 9.81× 30 × (1 - cos 37 ) + 4²] = 11.6 m/s

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Having students run in place at different speeds to illustrate particle movement in states of matter is an example of kinetic theory of matter.Kinetic theory of matter is the explanation of how particles in matter behave.

The kinetic theory explains that particles in matter are always in constant motion. The movement of these particles depends on the temperature and phase of matter.Particles in a solid state move slower than particles in a liquid state. Also, particles in a liquid state move slower than particles in a gaseous state. The faster the particles are moving, the higher the temperature.This means that having students run in place at different speeds to illustrate particle movement in states of matter is an example of kinetic theory of matter.

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Answer: Just took it!

Explanation:

Mechanical energy flows out of the magnets and into the electric charges in the loop of wire. Therefore,  the correct option is option A among all the given options.    

A current is the movement of particles (electrons) across wires and components. It is the charge flow rate. If an electric charge passes through a conductor, scientists say the conductor has an electric current. Electrons form a charge flow in circuits that use metallic conductors.

Electromagnetic induction in a moving loop of wire cause an electric generator to produce an electric current by mechanical energy flows out of the magnets and into the electric charges in the loop of wire cause.

Therefore,  the correct option is option A among all the given options.    

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Answer:

0.57 kg

Explanation:

We are given that

Force, F=20 N

Acceleration ,a =\(35m/s^2\)

We have to find the mass of Aero-plane.

To find the value of mass we will divide the force by acceleration.

We know that

Force, F=ma

Using the formula

\(20=m\times 35\)

\(\frac{20}{35}=m\)

\(m=0.57 kg\)

Hence, the mass of the aero-plane=0.57 kg

When we cover the top part of the lens, the image becomes dimmer. So we lose about half of the light from all areas of the object when we block half of the lens.

The camera is used to capture images, events, and so on. It is photographic and consists of a lens system convex lens and photographic film encased in a black box to make it light proof. The camera's operating mechanism is similar to the eye's, but the camera can also make tangible images.

The image becomes dimmer when we cover the top of the lens. This means that light from all areas of the object passes through all of the lens and then creates the image, so when we block half of the lens, we lose about half of the light from all areas of the object.

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The work done by the force on the particle is 39J and  the angle between F and s is 19.7 degree.

An item with mass is pulled or pushed which alters its velocity. A material that has the ability to change a body's rest or motion state is referred to as an external force. It possesses a magnitude and a direction.

Force F = (Fx, Fy)

Displacement S = (Sx,Sy)

Fx=10N

Fy=-1N

Sx=4m

Sy=1m

F=(10,-1)N and S=(4,1)m

Work done is calculated by taking dot product of force and displacement vector:

W=F·S

W=10×4 + (-1)×1

W=40+(-1)=39J

W = 39 J

To find angle between F and s:

\(|F|=\sqrt{10^2+(-1)^2}\)

|F| = √101

|S| = √(4² + 1²)

|S| = √17

W  = |F| |S| cosθ

39 = √101 √17 cosθ

θ = 19.7.

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Answer:

Tectonic movement is the primary cause of earthquake.

Answer:

86.4 m  horizontal from landing spot

Explanation:

Find out how long before the ball hits the ground

 vertical speed  of ball = -2  m/s     gravity = - 9.81 m/s^2

find time to hit ground from 100 m  

          ( height will be zero when it hits the ground)

0 =  100  - 2 t  - 1/2 ( 9.81) t^2

        use Quadratic Formula to find t = 4.32 seconds

              horizontal speed of ball = 20 m/s  

in 4.32 seconds it will travel horizontally   20  m/s * 4.32 s = 86.4 m

The formula for net torque is T=flsinФ which is the cross product of perpendicular force multiplied by distance.

When displaced from equilibrium, the system experiences a net force or torque in a direction opposite to the direction of the displacement. Equilibrium is independent of displacement from its original position

Energy is conserved so same amount of energy with or without machine Angular Momentum conserved if net external torque is zero Linear Momentum conserved if net external force is zero. Kinetic Energy conserved if elastic collision.

The first condition necessary to achieve equilibrium is the one already mentioned: the net external force on the system must be zero. Expressed as an equation, this is simply net F = 0 but Note that if net F is zero, then the net external force in any direction is zero. For example, the net external forces along the typical x- and y-axes are zero.

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The magnitude of force exerted on the woman by the floor when the lift is accelerating is 150 Newton.

Given the following data:

To calculate the force exerted on the woman by the floor when the lift is accelerating, we would apply Newton's Second Law of Motion:

Mathematically, Newton's Second Law of Motion is given by this formula;

\(Force = mass \times acceleration\)

Substituting the given parameters into the formula, we have;

\(Force = 60 \times 2.5\)

Force = 150 Newton.

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Answer:

2

Explanation:

I'm not sure but I think the answer is 2 because even the average of the 3 values is not quite close 28 Kg.