how does an ice cube cause hot coffee to become cool and through what heat transfer

The capacitor is used to store charge.

We have to know that the capacitor is the kind of device that can be used to store the electrical charges. As such, the capacitor can be able to be charged from a battery.

This question is incomplete and the mathematical details of the problem are missing. However, we should know that the efficiency of the charging would depend on the kind of battery that has been used and the nature of the capacitor as we have in the question above here.

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Answer:

Explanation:

Fgrav = 45.9 N; Fnorm = 45.9 N; Ffrict = 5.32 N; Fnet = 3.81 N, right; mu = 0.116

The starting point for any problem such as this is the construction of a free-body diagram in which you show all the individual forces which are acting upon the book. There are two vertical forces - gravity and normal force. There are two horizontal forces - friction and the applied force.

Since there is no vertical acceleration, normal force = gravity force. Each of these forces can be determined using the equation Fgrav = m • g = (4.68 kg) • (9.8 m/s/s) = 45.864 N

The net force can be determined from knowledge of the mass and acceleration of the sled. Fnet = m • a = (4.68 kg) • (0.815 m/s/s) = 3.8142 N, right.

Since the net force is to the right (in the direction of the applied force), then the applied force must be greater than the friction force. The friction force can be determined using an understanding of net force as the vector sum of all the forces. So 3.81 N, right = 9.13 N, right + Ffrict. Therefore, Ffrict = 5.32 N, left.

The coefficient of friction can now be determined as the ratio of friction force to normal force. "mu" = Ffrict / Fnorm = (5.32 N) / (45.864 N) = 0.116.

Answer:

Smoking damages the respiratory system by irritating the trachea and larynx due to the toxic chemicals and by causing swelling and narrowing of the airways and excess mucus in the lung passages. Two conditions that can develop when a person smokes is breathlessness and reduced lung function.

Explanation:

Smoking causes damages to the respiratory system by narrowing the airways and filling an excess of mucus in the lungs. It is a bad habit that may cause emphysema and chronic bronchitis.

Cigarettes contain more than 500 chemical substances in addition to nicotine, an addictive substance found in tobacco.

Cilia are hair-like projections localized in the airways that act to eliminate mucus and foreign (potentially harmful) matter.

The toxic compounds contained in cigarettes can paralyze the cilia in the airways and destroy them.

Smoking may produce:

In consequence, smoking is associated with chronic obstructive pulmonary diseases, including chronic bronchitis or emphysema.

In conclusion, smoking causes damages to the respiratory system by narrowing the airways and filling an excess of mucus in the lungs. It is a bad habit that may cause emphysema and chronic bronchitis.

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The front bumper on the go-kart is rated to withstand a force of 50,000 N. If the driver crashes into a brick wall at 4 m/s and the impact lasts 0.05 seconds, the bumper will not be crushed.

A force is an effect that changes, or accelerates, the motion of a mass-containing object. It is a vector quantity since it can be either a push or a pull and always has magnitude and direction. It is denoted by the letter F and is measured in newtons (N), the SI unit of force. Newton's second law originally stated that the rate at which an object's momentum changes over time is equal to the net force acting upon it. The acceleration of an object is directly proportional to the net force exerted on the object, is in the direction of the net force, and is inversely proportional to the mass of the object if the mass of the object is constant.

No, the bumper will not be crushed in the collision. The equation for calculating the force of an impact is F = m×a, where F is the force of the impact, m is the mass of the go-kart, and a is the change in velocity of the kart. The force of the impact in this case is F = m× \(\frac{4m/s}{0.05 s}\) = 800 m/s. This is much lower than the 50,000 N rating of the bumper, meaning that the bumper will not be crushed.

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Answer: i think its local drive

Explanation:

Answer:

on the server

Explanation:

thats how the cloud works

Answer:

"solve: given that F -12 N and time 4 seconds and let we have to find out the P.

F = 12 N

t = 4 s

p = ?

F = m×( v - u ) / t

12 = m×v / 4

m×v = 12× 4

p = 48 kg m/s

Linear momentum will be 48 kg m/s.

Explanation:

Answer:

Gravitational force can be seen as the pull that the earth has on an piece of matter. Everything on earth has a force acting on it which is gravity. It tries to pull two object closer to each other but never apart. The numerical value for gravitational force is 9.8 m/s^2 for free falling objects

The item has no energy at its greatest point since all of it's kinetic energy has been transformed into potential energy; as a result, the velocity is null and the object is not accelerating.

The best engine in the cosmos is the speed of light. A study that was earlier this month published in the scientific journal Nature revealed that it was an illusion.

The formula for gravitational force is P.E. Equals mgh, where g is the deceleration caused by gravity (9.8 m/s2 at the earth's surface) when h is the elevation in meters. The units for gravitational potential energy are kg m2/s2, which are the same as those for kinetic energy.

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Answer:

b

Explanation:

because f its electronic configuration 2:8 indicating that it has 8 electrons in its outer most energy level

Answer:

-Increase in temperature: increase

-Decrease in temperature: decrease

-Increase in volume: increase

-Decrease in volume: decrease

-Increase in pressure: increase

-Decrease in pressure: decrease

Explanation:

-Increase in temperature:

● Molecules gain kinetic energy and move fast thus increasing distance

-Decrease in temperature:

● Kinetic energy of molecules decrease so they have smaller distance

-Increase in volume:

● Molecules have more space to move around so distance increase

-Decrease in volume:

● Less space, molecules collide with each other because of decreased distance thus increasing pressure

-Increase in pressure

● Molecules collide with each other and the walls of container increasing pressure so molecules move faster and it increases distance

-Decrease in pressure:

● Molecules collide with each other and walls of container less frequently so distance between molecules decrease

True conditions

Efficiency of Heat Exchanger are as below:

the heat exchange process between two fluids with different temperatures using solid walls occurs in various engineering applications. The tool to achieve this exchange is a heat exchanger. Some applications like air conditioning, power generation, waste heat recovery, and chemical processing use this device.

The basis of the work of a heat exchanger is that the hot fluid enters the heat exchanger at temperature T1 and its heat capacity is Chot. Also, the cold fluid with the heat capacity of Ccold enters temperature t1; in the meantime, the hot fluid loses its heat, and its temperature drops to T2. It delivers heat to the cold fluid to increase its temperature to t2 and leave the heat exchanger at this temperature.

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Electric current is generated when a bar magnet is moved through a wire coil.

A coil of wire and a magnet can be used to create an electric current. When a magnet moves into a coil of wire, a voltage is created. We refer to this process as electromagnetic induction. When the magnet is repositioned outside of the coil, the direction of the induced voltage is reversed.

The magnetic fields around each loop created when the wire is bent into a coil combine to form a long, thin magnet with north at one end and south at the other. The coil's magnetic field is stronger when current is flowing the more loops it has. A magnet created using only a wire coil is not very powerful.

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Answer:

2.5 m/s²

Explanation:

Given:

v₀ = 15 m/s

v = 45 m/s

t = 12 s

Find: a

a = (v − v₀) / t

a = (45 m/s − 15 m/s) / 12 s

a = 2.5 m/s²

The maximum height achieved by the body is 2.645 meters.

The maximum height achieved by the body when thrown upwards with velocity {v} is -

h{max} = v²/2g

Given is to find the maximum height achieved by the body.

The maximum height achieved by the body is -

h{max} = v²/2g

h{max} = (2.3)²/20

h{max} = (2.3)²/20

h{max} = 2.645 meters

Therefore, the maximum height achieved by the body is 2.645 meters.

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{A diver jumps off the 2.8 m springboard with an initial velocity of 3.2 m/s.

to. Determine the maximum height.}

The time available on Machine II must lie between 1 minute and 3 minutes. The shadow price for Resource 2 (associated with constraint 2) is $3 per minute.

(a) To determine the range of available time on Machine II, we need to consider the constraints provided. The time available on Machine II must be between the time required for Type A souvenirs and the time required for Type B souvenirs.

Time required for Type A souvenir on Machine II: 1 minute

Time required for Type B souvenir on Machine II: 3 minutes

Therefore, the time available on Machine II must lie between 1 minute and 3 minutes.

The meaningful solution for the available time on Machine II is 1 min ≤ Machine II ≤ 3 min.

(b) To maximize the profit, we need to determine the optimal production quantities for Type A and Type B souvenirs given a change in the available time on Machine II.

Let's assume the change in available time on Machine II is represented by k.

To maximize the profit, we need to find the production quantities that maximize the total profit. Let's denote the production quantity for Type A souvenirs as x and the production quantity for Type B souvenirs as y.

The objective function for the profit can be expressed as:

Profit = 0.80x + 1.60y

Subject to the following constraints:

2x + y ≤ 120 (Machine I constraint)

x + 3y ≤ (300 + k) (Machine II constraint)

Using linear programming techniques, the optimal solution will depend on the value of k.

The statement "Ace Novelty's profit is maximized by producing Type A souvenirs 540 5 and 2(223+ *). 3 Type B souvenirs, where -225 1x ** $ 150 X X" seems to be incomplete and unclear. The specific production quantities and profit cannot be determined without knowing the value of k.

(c) To find the shadow price for Resource 2 (associated with constraint 2), we can perform sensitivity analysis.

The shadow price represents the change in the objective function's value per unit increase in the availability of Resource 2 (Machine II in this case). We can determine it by evaluating the sensitivity of the objective function to changes in the constraint.

Since the constraint is x + 3y ≤ (300 + k), the shadow price associated with Resource 2 is the coefficient of the Machine II term, which is 3.

Therefore, the shadow price for Resource 2 (associated with constraint 2) is $3 per minute.

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The resistance of the 1000 W microwave oven that gets plugged into a 110 v outlet will be 10 ohms.

Resistance is a type of opposition force due to which the flow of current is reduced in the material or wire. Resistance is the enemy of the flow of current.

The given data in the problem is;

P is the power= 1000 W

V is the voltage= 110 V

I is the current

R is the resistance

The resistance is found by the formula;

\(\rm P = \frac{V^2}{R} \\\\ \rm R = \frac{V^2}{P} \\\\ R = \frac{(100)^2}{10000} \\\\ R= 10\ ohm\)

Hence, the resistance value will be 10 ohms.

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Given that the two resistors are connected in parallel and each resistance is 14 ohms.

The current in the circuit is I = 0.1 A.

We have to find the voltage of the battery.

Let the voltage be denoted by V.

First, we have to find the equivalent resistance.

The equivalent resistance is 7 ohm.

According to Ohm's law, the voltage can be calculated by the formula

Thus, the voltage of the battery is 0.7 V.

A subway train starts from rest at a station and accelerates at a rate of 1. 60 m/s2 for 14. 0 s. It runs at constant speed for 70. 0 s and slows down at a rate of 3. 50 m/s2 until it stops at the next station. The distance covered by it is 1796.48 m.

To find the velocity after 14 seconds:

Vf = Vi + at

v=0+1.6×14

v = 22.4m/s^2.

Now find the total distance covered in these 14 seconds

S1=(a×t^2)/2

S1 = 1.6 × 14 × 14/2

S1 = 156.8 meters.

Now find the distance for the next 40 seconds

S2 = v×t + (1/2)at^2)

S2 = 22.4 × 70 + 0

S2 = 1568 m

Time taken to stop the train

v=u+at

0=22.4 - 3.5×t

t = 6.4 s

Distance traveled during this time

S3=22.4×6.4-(1/2)3.5×6.4^2

S3 = 71.68 m

Total distance covered :

S1 + S2 + S3 = 1796.48m

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The final speed of the railroad cart is equal to 12 m/s.

According to the law of conservation of momentum, the sum of the momentum before and after the collision of the objects must be equal.

m₁u₁ + m₂u₂ =  m₁ v₁ + m₂ v₂

Where m₁ and m₂ are the mass of the objects, u₁ and u₂ are the initial speed while v₁ & v₂ is the final speed.

The momentum of an object is defined as the product of the mass times the velocity of that object.

Given the mass of the empty cart, m₁ = 200 Kg

The mass of the rock, m₂ = 50 Kg

The initial velocity of the empty cart, u₁ = 0

m₁ u₁ + m₂ u₂ = (m₁ + m₂)× V

200 × 15 + 50 × 0=  (200 + 50) × V

V = 12 m/s

Therefore, the final speed of the railroad cart is equal to 12 m/s.

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The statements true in regards to heat is 3. Heat is a form of energy, can be reflected by a mirror, and cannot pass through a vacuum.

Heat is a form of energy. Heat is the transfer of thermal energy from one object to another. Thermal energy is the energy of motion of the particles in an object. Heat can be reflected by a mirror. Heat is a form of electromagnetic radiation, and electromagnetic radiation can be reflected by mirrors.

Heat cannot pass through a vacuum. Heat is a form of electromagnetic radiation, and electromagnetic radiation cannot pass through a vacuum. Heat is not an electromagnetic radiation. It is a form of energy that is transferred from one object to another because of a difference in temperature.

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Complete question:

Which of the following statements are true regarding heat?

(a) Heat is a form of energy

(b) Heat can be reflected by mirror

(c) Heat is an electromagnetic radiation

(d) Heat can pass through vacuum

Select the correct answer from the codes given below :

1. 1, 2 and 3

2. 2, 3 and 4

3. 1, 2 and 4

4. 1, 3 and 4

The final speed of the rocket, given it started with a speed of 120 m/s and slows down at a rate of 22 m/s² for 4 seconds is 208 m/s

From the question given above, the following parameters were obtained:

The final speed of the rocket can be obtained as follow:

v = u + at

v = 120 + (22 × 4)

Clear bracket

v = 120 + 88

v = 208 m/s

Thus, we can conclude from the calculation above that the final speed of the rocket is 208 m/s

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The other car is traveling at approximately 68.8 mph.

To find the speed of the other car, we can use the fact that the distance between the two cars is increasing at a rate of 20 mph. This means that the rate at which the distance between them is changing is equal to the difference in their speeds. Let's call the speed of the other car "x".

Using the Pythagorean theorem, we can find the initial distance between the two cars:

sqrt((0.6)^2 + (0.8)^2) = 1 mile

Now we can set up an equation:

x - 60 = 20

This is because the police car is traveling at a constant speed of 60 mph, and the distance between the two cars is increasing at a rate of 20 mph.

Solving for x, we get:

x = 80

However, this is the speed of the other car relative to the police car. To find the actual speed of the other car, we need to add the speed of the police car:

x + 60 = 68.8 mph (rounded to one decimal place)

Therefore, the other car is traveling at approximately 68.8 mph.

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The loading error in this case is 0V, indicating that there is no loading effect on the output voltage recorded by the voltmeter.

(b) The condition for maximum voltage transfer from a network to a load can be illustrated using the concept of impedance matching. For maximum voltage transfer, the load impedance should be equal to the complex conjugate of the network impedance. This condition is known as impedance matching.

Mathematically, if the network impedance is Zn and the load impedance is Zl, then for maximum voltage transfer:

Zl = Zn×

where Zn× represents the complex conjugate of Zn.

By ensuring impedance matching, the maximum power transfer theorem can be applied, resulting in maximum voltage transfer from the network to the load.

(c) To calculate the output voltage recorded by the voltmeter and the corresponding loading error, we can use the voltage divider rule.

The output voltage recorded by the voltmeter (Vout) can be calculated as:

Vout = Vin × (R2 ÷ (R1 + R2))

where Vin is the supply voltage (15V), R1 is the resistance of the potentiometer (8KΩ), and R2 is the input resistance of the voltmeter (12KΩ).

Vout = 15V × (12KΩ ÷ (8KΩ + 12KΩ))

Vout = 15V × (12KΩ ÷ 20KΩ)

Vout = 9V

Therefore, the output voltage recorded by the voltmeter is 9V.

The loading error can be calculated as the difference between the ideal output voltage (without loading) and the actual output voltage recorded by the voltmeter. In this case, the ideal output voltage would be Vout = Vin × (R2 ÷ (R1 + R2)), assuming no loading effect.

Ideal Vout = 15V × (12KΩ ÷ (8KΩ + 12KΩ))

Ideal Vout = 15V × (12KΩ ÷ 20KΩ)

Ideal Vout = 9V

Loading Error = Ideal Vout - Vout

Loading Error = 9V - 9V

Loading Error = 0V

Therefore, the loading error in this case is 0V, indicating that there is no loading effect on the output voltage recorded by the voltmeter.

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The unit of the quotient of inductance and resistance will be Henry and ohm

Inductance is the tendency of an electrical conductor to oppose a change in the electric current flowing through it. The flow of electric current creates a magnetic field around the conductor. The field strength depends on the magnitude of the current, and follows any changes in current.

Resistance is a measure of the opposition to current flow in an electrical circuit. Resistance is measured in ohms, symbolized by the Greek letter omega (Ω). Ohms are named after Georg Simon Ohm (1784-1854), a German physicist who studied the relationship between voltage, current and resistance.

unit of quotient of inductance = henry (H)

unit of resistance = ohm

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Answer:

The graph would increase constantly as shown above until it reached 50m/s. At 10s, the graph would be flat at 50m/s until 20s.

Explanation:

Answer:

A light-year is a unit of distance. It is the distance that light can travel in one year. Light moves at a velocity of about 300,000 kilometers (km) each second. So in one year, it can travel about 10 trillion km. More p recisely, one light-year is equal to 9,500,000,000,000 kilometers

The average velocity of the object in the first 5 seconds is 4 m/s.

The average velocity of an object can e defined as the average of the velocities of the object throughout its motion.

Average velocity can also be defined as the ratio of the total displacement of the object and the total time taken.

Considering the given object:

total displacement in the first 5 seconds = 40 m

time taken = 5 seconds

Average velocity = 40 m / 5 seconds

Average velocity = 4 m/s

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Answer: hydrogen and helium

Explanation: