The mass of the water in the tank is 50 kg. What is the amount of heat supplied by the heating coil in the first 20minutes?​

Answer:

I) 420000J

ii)

Explanation:

(I) so you can use the formula for quantity of heat then substitute the values given

formula-Q=mc∆9

A huge ship can have an enormous momentum when it moves relatively slowly because momentum is a product of the mass and velocity of an object.

The mass of a ship is incredibly large, and even though it may move at a relatively slow speed, the product of its mass and velocity still results in a significant momentum.

Momentum is a measure of how difficult it is to stop a moving object.

An object with a large momentum is difficult to stop, while an object with a small momentum is easy to stop.

For example, if a small car traveling at high speed collides with a large truck that is barely moving, the car will experience a greater force than the truck because it has a greater momentum.

the momentum of a huge ship can be enormous even if it moves relatively slowly because its mass is so large.

It would require a significant force to stop the ship, even if it is moving slowly.

This is why it is essential to have a good understanding of momentum when designing and operating large vessels like ships.

To know more about velocity visit:

https://brainly.com/question/30559316

#SPJ11

When a firefighter slides down a pole at a constant speed, the weight of the firefighter and the force of friction between them are balanced.

In other words, the force of gravity acting on the firefighter's body due to his weight is equal to the force of friction that opposes his motion and is produced by the contact between his body and the pole.

Learn more about force of friction:

https://brainly.com/question/24338873

#SPJ11

Answer:

5 cm

Explanation:

The displacement from Rhonda's car to her campsite 257 m, 34.4° north of west.

Most campgrounds have picnic tables, a place to park your car, and a place to pitch your tent. Bathrooms and taps are often shared. One of the joys of camping is the lack of outdoor gear. But it's also nice to have a comfortable, convenient and cozy campsite. A tent is a small shelter for sleeping while camping.

Camps are areas with tents campfires and surroundings. There are many types of camping but the main methods of camping are backpacking auto-camping and glamping. These top three camping styles have options for every level of camper. Front country camping is also called auto camping because you can drive to the campground. These campsites usually have running water and modern washrooms.

Learn more about The displacement here:-https://brainly.com/question/321442

#SPJ1

Answer:

Feeling's.

Explanation:

Nobody can measure the feeling of a person or love , etc

Explanation:

because the molecules are closer together and more tightly bonded in solids

For a pure substance, the melting temperature range is low

The melting point range is widened as a result of impurity addition, which lowers the melting point. The melting point range is reduced because pure substances have greater melting points.

The typical definition of the melting point is the temperature at which a substance transforms from a solid to a liquid.

The melting point of a liquid is the temperature at which the liquid transforms from a solid to a liquid under atmospheric pressure. This is the location where the liquid and solid phases are equally present.

By placing a tiny amount of an organic solid into a tiny capillary tube, affixing it to the stem of a thermometer centred in a heating bath, slowly heating the bath, and observing the temperatures at which melting begins and is complete, it is possible to determine the melting point of an organic solid.

Learn more about melting point:

https://brainly.com/question/25074953

#SPJ4

Answer:

143.6/21.2

=6.773584906

=6.8

Answer:

C

Explanation:

Fusion and fission are similar in that they both release large amounts of energy. Nuclear fusion is a process in which two nuclei join to form a larger nucleus. Nuclear fission is a process in which a nucleus splits into two smaller nuclei.

Answer:

The electrical energy consumed in boiling the water is 0.0788 kWh

Explanation:

Given;

mass of the water, m = 600 g = 0.6 kg

power rating of the kettle, P = 1500 W = 1.5 kW

specific heat capacity of water, c = 4,200 J/kg⁰C

density of water, = 1000 kg/m³

time taken to boil the water, t = 3 mins + 9 s = (3 x 60s) + 9 s = 180 s + 9 s = 189 s = \(189 \ s \times \frac{1 hr}{3.600 \ s} = 0.0525 \ hr\)

The electrical energy consumed in boiling the water is calculated as;

E = P x t

E = 1.5 kW  x 0.0525 hr

E = 0.0788 kWh

Therefore, the electrical energy consumed in boiling the water is 0.0788 kWh

Answer:

The solution is unsaturated.

Explanation:

Saturated solutions are those solutions with the maximum amount of solute completely dissolved by the solvent. This indicates that although more solute is added, it does not dissolve. In this case the amount of solute is equal to the solubility coefficient.

The supersaturated solution  is one in which the amount of solute exceeds the solubility of the solvent, that is, it has a greater amount of dissolved solute than that which it admits at that temperature. In this case a solution contains solute above the solubility coefficient.

A solution is considered to be unsaturated if the mass of dissolved solute is less than that corresponding to that of saturation. This indicates that it is possible to add more solute and that it dissolves. In this case the solution contains solute below the solubility coefficient.

The solubility of barium nitrate is 9.02 g/100 g H₂O at 20°C.

A 15.2 g sample of barium nitrate is added to 200.0 g of water at 20°C. This is: 15.2 g /200 g H₂O.  Dividing by two you get: 7.6 g /100 g H₂O

Comparing with the solubility of barium nitrate, you can see that the mass of dissolved solute is less than the corresponding one. This indicates that the solution is unsaturated.

Answer:

Approximately \(14\; {\rm m\cdot s^{-1}}\).

Explanation:

The gravitational potential energy \(\text{GPE}\) of this roller coaster is proportional to the height \(h\) of the roller coaster.

The kinetic energy \(\text{KE}\) of this roller coaster is proportional to the square of speed \(v\).

The question states that the track is frictionless. Thus, during the descent, the \(\text{GPE}\) of this roller coaster is turned into \(\text{KE}\) without any energy loss.

When the roller coaster was at \((1/2)\) of the the initial height, only\(1 - (1/2) = (1/2)\) of the original \(\text{GPE}\) was turned into \(\text{KE}\). The \(\text{KE}\!\) of this roller coaster at that height would be \(1 - (1/2) = (1/2)\!\) of the \(\text{KE}\!\!\) when the roller coaster is at the ground level.

The \(\text{KE}\) of the roller coaster is proportional to \(v^{2}\) (the square of speed \(v\).) Thus, since the \(\text{KE}\!\) at \((1/2)\) the initial height is \(1 - (1/2) = (1/2)\!\) the \(\text{KE}\!\!\) at the ground level, the \(v^{2}\) at \((1/2)\!\) the initial height would also be \(1 - (1/2) = (1/2)\!\) the \(v^{2}\!\) at the ground level.

Since \(v = 20\; {\rm m\cdot s^{-1}}\) at the ground level, \(v^{2} = (20\; {\rm m\cdot s^{-1}})^{2}\) at the ground level. The \(v^{2}\) at \((1/2)\) the initial height would then be:

\((1 - (1/2))\times (20\; {\rm m\cdot s^{-1}})^{2}\).

Thus, the speed \(v\) at \((1/2)\) the initial height would be:

\(\begin{aligned}& \sqrt{(1 - (1/2))\times (20\; {\rm m\cdot s^{-1}})^{2}} \\ =\; & \sqrt{\frac{1}{2} \times (20\; {\rm m\cdot s^{-1}})^{2}} \\ =\; & \sqrt{200}\; {\rm m\cdot s^{-1}} \\ \approx\; & 14\; {\rm m\cdot s^{-1}}\end{aligned}\).

To achieve 90% of maximum vapor concentration, the bubble should remain in water for a calculated time.

To determine the time required for a bubble to achieve 90% of the maximum vapor concentration, we need to consider the diffusion process. The diffusion rate can be described by Fick's law, which states that the rate of diffusion is proportional to the concentration gradient. In this case, the concentration gradient will be between the water surface and the center of the bubble.

First, we need to calculate the maximum possible vapor concentration at the given temperature of 298 K using the vapor pressure of water. Once we have this value, we can calculate 90% of it.

Next, we can calculate the diffusion coefficient for water vapor in air using available data. The diffusion coefficient depends on temperature, pressure, and the molecular properties of the substances involved.

Using Fick's law, the diffusion rate can be calculated as the product of the diffusion coefficient and the concentration gradient. We can assume a steady-state diffusion process, which means the rate of vapor entering the bubble is equal to the rate of diffusion out of the bubble.

Finally, we can determine the time required for the bubble to reach 90% of the maximum vapor concentration by dividing the distance from the surface to the center of the bubble by the diffusion rate.

Overall, the calculation involves determining the maximum vapor concentration, finding the diffusion coefficient, calculating the diffusion rate, and finally, determining the time required for the bubble to achieve 90% of the maximum concentration.

Learn more about vapor

brainly.com/question/30820393

#SPJ11

Answer:

energy and matter

Explanation:

physics is the study of matter and it interaction with energy

20.206 N is the force of friction that the wheels have against the floor

Frictional force refers to the force generated by two surfaces that contact and slide against each other.

since , F net = 0

F - fr = m * a                                     equation1

where

F = applied force = 28 N

fr = frictional force = ?

m = mass of object = 43.3 kg

a = acceleration = 0.18 m\(/s^{2}\)

substituting values in equation 1

28 - fr = 43.3  * 0.18

fr = 20.206 N

20.206 N is the force of friction that the wheels have against the floor

To learn more about force of friction here :

https://brainly.com/question/29022216

#SPJ1

Answer: a bridge suspended by cables

Answer:

5.15 when the angle of incidence is equal to critical angle the angle of reflection is equal to 90 if the angle of incidence is bigger than the critical anger the reflected ray will not emerge from the medium but will be reflected back into the medium this is called total internet reflection

Explanation:

hope it's helpful

Ignoring the air resistance it will take about 3 seconds for the object to reach the ground.We know that the acceleration due to gravity is 10m/s2.

We also know that the final velocity is 30 m/s while the initial velocity is 0 m/s

we can use the formulae for acceleration to calculate the time taken/

(final - initial velocity)/timetaken=10

(30-0)/timetaken=10

timetaken =30/10=3 seconds

Answer:

I think its B. Please keep in mind that I could be wrong.

Explanation:

The length of the vector is proportional to the size of the force.

The wheelchair is not accelerating, so the forces on it are balanced.

In a free-body diagram of the wheelchair, force due to gravity points down,  normal force points up, force pushing the wheelchair points forward, friction resisting the motion points backward.

For the force diagram:

Forces are a push or pull agents that causes a change in the state of a body when they are applied to the body.

Unbalanced forces cause acceleration of a body.

In a free-body diagram, the mass (force) on an object is represented by a vector.

The length of the vector is proportional to the size of the force. Suppose you push a wheelchair forward at constant velocity. The wheelchair is not accelerating, so the forces on it are balanced. In a free-body diagram of the wheelchair, the vector for the force due to gravity points down, the vector for the normal force points up, the vector for your force pushing the wheelchair points forward, and the vector for the force of friction resisting the motion points backward.

Considering the picture visual representation of the forces between many interacting objects or the force diagram:

In picture 1: F gravity points down; F normal points up

In picture 2: F gravity points down; F tension points up

In picture 3: F gravity points down; F spring points up.

Learn more about forces at: https://brainly.com/question/12970081

#SPJ1

If a truck has a linear acceleration of 1.85 m/s² and the wheels have an angular acceleration of 5.23 rad/s², the diameter of the truck's wheels   0.71 m.

Linear acceleration refers to the time rate of change of linear velocity, whereas angular acceleration refers to the time rate of change of angular velocity. This is the primary differential between linear and angular acceleration. Simply said, changes in an object's linear velocity with respect to time are represented by changes in linear acceleration.

The angular acceleration can be deduced immediately from the concept of α =ΔωΔt because the ultimate angular velocity and time are both provided.

The link between linear acceleration (a) and rotational acceleration is expressed as a = r×α . When the angular acceleration increases, so will the linear acceleration's strength. Increased wheel angular acceleration, for instance, denotes an accelerated vehicle.

Linear acceleration is the uniform acceleration caused by a moving body moving along a straight line. There are three equations that are essential in linear acceleration, depending on parameters like start and terminal velocities, displacements, times, and acceleration.

Given :

linear acceleration a = 1.85 m/s²

angular acceleration α  = 5.23 rad/s²

radius r = a/ α  = \(\frac{1.85}{5.23}\) = 0.354 m

diameter  d = 2r = 2 × 0.354 = 0.71 m

diameter of the wheels is  0.71 m.

To know more about angular acceleration, visit:

https://brainly.com/question/29428475

#SPJ1

Answer:

The speed of the student just before she lands, v₂ is approximately 8.225 m/s

Explanation:

The given parameters are;

The mass of the physic student, m = 43.0 kg

The height at which the student is standing, h = 12.0 m

The radius of the wheel, r = 0.300 m

The moment of inertia of the wheel, I = 9.60 kg·m²

The initial potential energy of the female student, P.E.₁ = m·g·h₁

Where;

m = 43.0 kg

g = The acceleration due to gravity ≈ 9.81 m/s²

h = 12.0 h

∴ P.E.₁ = 43 kg × 9.81 m/s² × 12.0 m = 5061.96 J

The kinetic rotational energy of the wheel and kinetic energy of the student supporting herself from the rope she grabs and steps off the roof, K₁, is given as follows;

\(K_1 = \dfrac{1}{2} \cdot m \cdot v_{1}^2+\dfrac{1}{2} \cdot I \cdot \omega_{1}^2\)

The initial kinetic energy, 1/2·m·v₁² and the initial kinetic rotational energy, 1/2·m·ω₁² are 0

∴ K₁ = 0 + 0 = 0

The final potential energy of the student when lands. P.E.₂ = m·g·h₂ = 0

Where;

h₂ = 0 m

The final kinetic energy, K₂, of the wheel and student is give as follows;

\(K_2 = \dfrac{1}{2} \cdot m \cdot v_{2}^2+\dfrac{1}{2} \cdot I \cdot \omega_{2}^2\)

Where;

v₂ = The speed of the student just before she lands

ω₂ = The angular velocity of the wheel just before she lands

By the conservation of energy, we have;

P.E.₁ + K₁ = P.E.₂ + K₂

∴ m·g·h₁ + \(\dfrac{1}{2} \cdot m \cdot v_{1}^2+\dfrac{1}{2} \cdot I \cdot \omega_{1}^2\) = m·g·h₂ + \(\dfrac{1}{2} \cdot m \cdot v_{2}^2+\dfrac{1}{2} \cdot I \cdot \omega_{2}^2\)

Where;

ω₂ = v₂/r

∴ 5061.96 J + 0 = 0 + \(\dfrac{1}{2} \times 43.0 \, kg \times v_{2}^2+\dfrac{1}{2} \times 9.60 \, kg\cdot m^2 \cdot \left (\dfrac{v_2}{0.300 \, m} }\right ) ^2\)

5,061.96 J = 21.5 kg × v₂² + 53.\(\overline 3\) kg × v₂² = 21.5 kg × v₂² + 160/3 kg × v₂²

v₂² = 5,061.96 J/(21.5 kg + 160/3 kg) ≈ 67.643118 m²/s²

v₂ ≈ √(67.643118 m²/s²) ≈ 8.22454363 m/s

The speed of the student just before she lands, v₂ ≈ 8.225 m/s.

Answer:

5000°A

Explanation:

If it is right answer so please mark me as brainleist anwer as ur wish

The information about the increasing density of impact craters on a moon's surface over time can be used to determine the relative age of the moon's surface.

This concept is based on the principle of superposition, which states that in undisturbed layers of rock or regolith, the oldest layers are at the bottom, and the youngest layers are at the top. When meteorites impact the surface of the moon, they create craters. Over time, new craters form on top of older craters. Therefore, the density of impact craters on the moon's surface can be an indicator of its relative age. If a specific region of the moon has a high density of impact craters, it suggests that the region is older because it has been exposed to meteorite impacts for a longer time, accumulating more craters.  On the other hand, a region with a lower density of impact craters indicates a relatively younger surface with less time for meteorite impacts to accumulate. By comparing the density of impact craters on different regions of the moon's surface, scientists can make relative age determinations. Areas with higher crater density are considered older, while areas with lower crater density are considered younger. It's important to note that this method of age determination assumes a constant rate of meteorite impacts over time and that there have been no major geological events or processes that could have reset or altered the surface. Additionally, the age determination based on crater density is a relative dating technique and does not provide an exact or absolute age for the moon's surface.

Learn more about moon's  here:

https://brainly.com/question/30861325

#SPJ11

Elasticity is of significant importance in the everyday lives of businesses and consumers as it helps them understand and respond to changes in prices and demand for goods or services. By considering elasticity, businesses can make informed decisions regarding pricing strategies, production levels, and resource allocation. Consumers, on the other hand, can assess the impact of price changes on their purchasing decisions and adjust their consumption patterns accordingly.

Elasticity, specifically price elasticity of demand, measures the responsiveness of consumer demand to changes in price. It indicates the percentage change in quantity demanded resulting from a one percent change in price. Understanding price elasticity allows businesses to determine how sensitive consumers are to changes in price and adjust their pricing strategies accordingly.

For example, let's consider the market for gasoline. Gasoline is a highly price-sensitive good, meaning that changes in its price have a significant impact on consumer demand. If the price of gasoline increases, consumers may reduce their consumption and seek alternatives such as carpooling or using public transportation. In this scenario, businesses need to consider the price elasticity of gasoline to predict and respond to changes in consumer behavior. They might lower prices to stimulate demand or introduce more fuel-efficient options to cater to price-conscious consumers.

In conclusion, elasticity matters because it provides valuable insights into the dynamics of supply and demand, enabling businesses and consumers to make informed decisions in response to price changes. By understanding elasticity, businesses can adapt their strategies to maintain competitiveness, while consumers can optimize their purchasing choices based on price sensitivity.

To know more about Elasticity click here:

https://brainly.com/question/30999432

#SPJ11

The time of motion of the stone when it hits the bottom is 3.41 seconds.

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

The time taken for the stone dropped from the given height to hit the bottom of the well is calculated as follows;

h = vt + ¹/₂gt²

where;

h = ¹/₂gt²

2h = gt²

t² = 2h/g

t = √(2h/g)

t = √(2 x 57 / 9.81)

t = 3.41 seconds

Thus, we can conclude that when the stone is dropped, it takes more than 3 seconds to hit the bottom of the well.

Learn more about time of motion here: https://brainly.com/question/2364404

#SPJ1

The new current will be 4I. The power dissipated by the resistor will increase by a factor of 16.

To learn more about resistor refer :

brainly.com/question/24858512

#SPJ4