2 containers are brought in thermal contact and allowed to reach thermal equilibrium. if container 1 initially held 78.3 kg of liquid at a temperature of 271 k, and container 2 initially held 50.6 kg of the same liquid at a temperature of 212 k, then what is their final temperature?

Answer:

P.E = 4.398 Joules.

Explanation:

Given the following data;

Spring constant, k = 71.8N/m

Displacement, x = 0.35m

To find the elastic potential energy;

The elastic potential energy of an object is given by the formula;

\( P.E = \frac {1}{2}kx^{2}\)

Substituting into the equation, we have;

\( P.E = \frac {1}{2}*71.8 *(0.35)^{2}\)

\( P.E = 35.9 * 0.1225 \)

Elastic potential energy = 4.398 Joules.

Therefore, the elastic potential energy of the spring is 4.398 Joules.

A potential difference applied across a circuit drives an electric current, which is the flow of charged particles. In a conductor, such as a metal wire, the charged particles that carry the current are electrons.                                              

Protons are positively charged particles, but they are much larger and less mobile than electrons in a conductor. Therefore, they do not contribute significantly to the current flow. In fact, the protons in a conductor are generally held in place by the atomic nuclei, so they cannot move through the material. Thus, there is no proton current in a conductor with a potential difference applied across the circuit.
Protons, being part of the atomic nucleus, are held firmly within the atoms of the conductor and cannot move as freely as electrons. This difference in mobility leads to the absence of proton current in a typical conductor when a potential difference is applied across the circuit.

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Answer:

The laws of thermodynamics define a group of physical quantities, such as temperature, energy, and entropy, that characterize thermodynamic systems in thermodynamic equilibrium.

Answer:

The level of seed in each feeder

Explanation:

The independent variable is the variable which is the suspected cause of an observation, it is the variable that produce the effect observed in the dependent variable. The dependent variable is the variable that is measured

The independent variable is normally the x-value while the dependent variable is the y-value

In the question, Lana wants to find out the kind of birdseed that the neighborhood birds like (to eat) the most by feeding them different types of birdseed and measuring the level of the birdseed in the feeders at regular intervals

the independent variable is the bird seed types which Lana gives to the birds, to determine the type of bird seeds the birds like

The dependent variable is the level of the seed in the feeder which depends on the type of seeds the birds like.

Answer:

B: 28m/s

Explanation:

Use the speed formula

Speed =distance / time

Answer:

\(\boxed {\boxed {\sf B. \ 28 \ m/s}}\)

Explanation:

If we want to know how fast the cheetah is running, we need to calculate its speed. This is the rate at which an object moves and the formula is distance divided by time.

\(s=\frac{d}{t}\)

The cheetah ran 112 meters in 4 seconds.

Substitute the values into the formula.

\(s=\frac{112 \ m}{ 4\ s}\)

Divide.

\(s= 28 \ m/s\)

The cheetah's speed is 28 meters per second and choice B is correct.

1.) Electrons go back into like a lower energy level then would be release a thing called a photon light.

2.) I'm not sure on the correct numbers exactly but if I remember correctly around 70-80 percent is nitrogen, around 20-25 is percent oxygen, 0.9 percent is argon, and 0.1 percent other gases. 

3.) Glass is made from sand at least that's one popular element of making sand. one gathered, they are put into a high temperature and would soon make glass coming out of it within time.

The winds aloft chart for the Great Lakes (Michigan is fine) region displays the wind direction and speed at several altitudes. At 3000 feet, the wind speed is approximately 17 knots.

At 12,000 feet, the wind speed is about 44 knots. The wind speed at FL350 is approximately 67 knots.Surface friction has an effect on the winds close to the ground, slowing them down due to the frictional force exerted on the ground by air molecules. The winds shift direction with altitude, veering to the right of the direction of travel in the northern hemisphere. The approximate location of the Jetstream can be obtained by examining the wind/temperature plot chart. The fastest wind speed at FL360 appears to be approximately 145 knots, traveling towards the northeast. Flight to the east or southeast would benefit from this wind speed.Seasonally, winds aloft change depending on the position of the jet stream, which moves towards the poles during the summer months and towards the equator during the winter months.

The current surface analysis chart (Prog chart) shows the major frontal activity passing through the Midwest states. Precipitation is what leads the frontal passage in general, with both temperature and wind speed/direction changing from behind to ahead of the front.

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Answer:

letter D

Explanation:

sana po makatulong po sa inyo

Answer: Moisture and food (bread)

Explanation:

Mould grows best in humid, damp air/wet conditions.

Since the bread is moist it will provide humidity for the mould as well as food.

A container with a cover would not be a favoring condition as mould needs oxygen to grow and survive.

The given problem can be solved using the following free-body diagram:

The diagram is the free-body diagram for the pulley that is holding the weight. Where:

Now we add the forces in the vertical direction:

Adding like terms:

Now, since the velocity is constant this means that the acceleration is zero and therefore the sum of forces is zero:

Now we solve for "T" by adding "mg" from both sides:

Now we divide both sides by 2:

Now we substitute the values and we get:

Solving the operations:

Now we use the free body diagram for the second pulley:

Now we add the forces in the vertical direction:

The forces add up to zero because the velocity is constant and the acceleration is zero:

Solving for the force:

Therefore, the pulling force is equal to the tension we determined previously and therefore is:

Answer:

The main advantage of an electromagnet over a permanent magnet is that the magnetic field can be quickly changed by controlling the amount of electric current in the winding. However, unlike a permanent magnet that needs no power, an electromagnet requires a continuous supply of current to maintain the magnetic field.

Explanation:

The angular displacement of the baseball as it travels from the pitcher to the catcher is 13.2π radians.

To determine the angular displacement of the curveball as it travels from the pitcher to the catcher, we need to consider the given angular velocity and time.

1. First, we need to convert the angular velocity from revolutions per minute (rev/min) to radians per second (rad/s):
Angular velocity (ω) = 330 rev/min ×(2π rad/rev) × (1 min/60 s) = 22π rad/s

2. Now, we can find the angular displacement (θ) using the formula:
θ = ω × t
where t is the time it takes for the ball to reach the catcher.

3. Plug in the given values:
θ = (22π rad/s) × (0.60 s) = 13.2π rad

The angular displacement of the baseball as it travels from the pitcher to the catcher is 13.2π radians.

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Answer:

The net force acting on the person is 5.34 N acting upwards

Explanation:

The information given are;

Mass of the person = 55.0 kg

Density of the person = 1010 kg/m³

Body volume of the person = Mass/Density = 55/1010 = 0.0545 m³

Weight of the person = Mass × Gravity = 55 × 9.81 = 539.55 N↓

Where the density of water = 1000 kg/m³, we have;

Upthrust = weight of the water displaced = Mass of the water displaced × Gravity

Mass of the water displaced = Density of water × Volume of the water

Mass of the water displaced = Density of water × Body volume of the person

                                                = 1000 × 0.0545 = 54.5 kg

The Upthrust = 54.5 × 9.81 = 534.21 N↑

Given that the net force, \(F_{Net}\) acting is the sum of the mass of forces acting  on the person which are the weight acting downward and the upthrust acting upwards

We have;

F(Net) = 534.21↑ - 539.55↓ = 5.34 N↑

The net force acting on the person = 5.34 N upwards.

Answer:

-5.34

Explanation:

it says specifically to watch your sign

Answer:

2 N

Explanation:

From the question, it's given that

Mass m = 0.2 kg

Acceleration a = 10 m/s^2

The force a soccer goalie experience when stopping a ball will be equal to the force at which the ball is being kicked. This is

F = ma

Substitute all the parameters into the formula

F = 0.2 × 10

F = 2 Newton.

You have an electric field with an intensity of 18 N/C at a distance of 6. 0 m.  The voltage is 108 V

E=Fe/q represents an electric field.

Newtons per coulomb are used as the units.

Additionally, E=kc(q)/r2 with volts per meter as the units

N/C thus equals v/m. 18 N/C = 18 v/m, and

Electric field intensity across the wire is given as below.

E= V/d

E denotes the strength of the electric field, V is the voltage applied across the wire, and d denotes the wire's length.

V = E x d

V = 18 V/m x  6. 0 m

V = 108 V

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Answer:

According to the law of conservation of momentum:

Momentum of the car and insect system before collision = Momentum of the car and insect

system after collision

Hence, the change in momentum of the car and insect system is zero.

The insect gets stuck on the windscreen. This means that the direction of the insect is

reversed. As a result, the velocity of the insect changes to a great amount. On the other hand,

the car continues moving with a constant velocity. Hence, Kiran’s suggestion that the insect

suffers a greater change in momentum as compared to the car is correct. The momentum of

the insect after collision becomes very high because the car is moving at a high speed.

Therefore, the momentum gained by the insect is equal to the momentum lost by the car.

Akhtar made a correct conclusion because the mass of the car is very large as compared to

the mass of the insect.

Rahul gave a correct explanation as both the car and the insect experienced equal forces

caused by the Newton’s action-reaction law. But, he made an incorrect statement as the

system suffers a change in momentum because the momentum before the collision is equal to

the momentum after the collision.

\(\qquad\qquad\huge\underline{{\sf Answer}}\)

Here we go ~

\(\qquad \tt \dashrightarrow \:Electric \: \: current = \dfrac{ Charge }{time}\)

\(\qquad \tt \dashrightarrow \:E= \dfrac{36 }{45}\)

\(\qquad \tt \dashrightarrow \:E= 0.8 \: \: amp\)

The most likely cause of a change in action potential shape is alterations in ion channel activity, which affect the flow of ions across the cell membrane.

Action potentials are electrical signals generated by excitable cells, such as neurons and muscle cells, to transmit information. The shape of an action potential is determined by the coordinated opening and closing of ion channels, which allow the selective passage of ions across the cell membrane. Any disruption in ion channel activity can lead to changes in the action potential shape.

Several factors can cause alterations in ion channel activity. Mutations in ion channel genes can result in dysfunctional channels that fail to open or close properly. This can lead to prolonged depolarization or repolarization phases, resulting in a change in the action potential shape. Additionally, changes in the concentration of ions, such as potassium or calcium, can impact the activity of ion channels, leading to modifications in the action potential waveform.

External factors, such as drugs or toxins, can also influence ion channel activity and subsequently affect action potential shape. For example, certain medications can block specific types of ion channels, altering the membrane potential and changing the action potential morphology. Similarly, toxins produced by bacteria or other organisms can interfere with ion channel function, leading to abnormal action potentials.

In summary, alterations in ion channel activity caused by genetic mutations, changes in ion concentrations, drugs, or toxins are the most likely causes of changes in action potential shape. These disruptions can affect the flow of ions across the cell membrane and result in modifications to the characteristic waveform of action potentials.

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It is important to ensure that any burnt out bulbs are replaced immediately to minimize any potential risks. When a light bulb burns out above the grill station, there are several potential risks that can arise.

Firstly, it can create a dimly lit or dark environment that can make it difficult for the cook to properly see what they are doing. This can lead to accidents such as burns or cuts. Secondly, the lack of light can also make it difficult for the cook to properly monitor the food being cooked on the grill, which can lead to overcooked or undercooked food, and can pose health risks to consumers. Lastly, if the bulb is not replaced promptly, it can also pose a fire hazard due to the heat generated by the grill. Therefore, it is important to ensure that any burnt out bulbs are replaced immediately to minimize any potential risks.
A burnt-out light bulb above the grill station poses potential risks such as reduced visibility, increased likelihood of accidents, and compromised food quality. With insufficient lighting, it becomes difficult to monitor the cooking process, which may result in undercooked or overcooked food, affecting customer satisfaction. Additionally, poor visibility increases the chances of accidents involving hot surfaces or sharp objects, which can lead to injuries. To maintain a safe and efficient work environment, promptly replace the burnt-out light bulb and ensure adequate illumination at all times.

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To determine the speed at which the person was running, we can use the formula:

Speed = Distance / Time

In this case, the distance is the length of the football field, which is 100 meters, and the time is 20 seconds. Plugging these values into the formula, we get:

Speed = 100 meters / 20 seconds = 5 meters per second

Therefore, the person was running at a speed of 5 meters per second.

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For laminar flow of air in a circular tube where the inlet temperature is lower than the constant surface temperature of the tube, if the mass flow rate were increased, both the outlet temperature and the heat transfer rate would decrease.

When the mass flow rate is increased, the velocity of the fluid inside the tube also increases. This reduces the thermal boundary layer thickness and hence the amount of heat transferred to the fluid. As a result, the outlet temperature decreases. At the same time, since the heat transfer rate is directly proportional to the mass flow rate, an increase in mass flow rate will result in an increase in heat transfer rate. However, the decrease in outlet temperature will offset this increase, and the net effect will be a decrease in the heat transfer rate. Therefore, both the outlet temperature and the heat transfer rate would decrease when the mass flow rate is increased.

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The joints that connect the four fingers (excluding the thumb) with the carpal bones are called metacarpophalangeal joints (MCP joints).

The metacarpophalangeal joints are located at the base of each finger, where the metacarpal bones of the hand articulate with the proximal phalanges of the fingers. These joints allow for flexion (bending) and extension (straightening) of the fingers and also provide some degree of rotational movement.

There are five metacarpophalangeal joints in total, one for each finger. They are commonly referred to as the knuckles.

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The resultant speed of the power boat is approximately 26 km/hr. The resultant bearing of the power boat is S59°E. The distance the power boat has traveled after 2.5 hours is approximately 65 km.

What is resultant speed?

Resultant speed refers to the magnitude of the total or overall velocity of an object or system. It represents the combined effect of different velocities or the net effect of multiple velocity vectors acting on an object.

The sketch of the scenario is:

-The motorised boat is travelling at an 5 degree west of south angle.

- At an angle of 65 degrees south of east, the tidal stream is flowing eastward.

-The vector sum of the boat's velocity and the velocity of the tidal current will determine the power boat's final speed.

To find the resultant speed and bearing of the power boat, we can use vector addition. The boat's velocity vector and the tidal current's velocity vector can be added to find the resultant.

Given:

Power boat speed relative to water = 24 knots/hr

Tidal current speed = 12 km/hr

Angle between the boat's bearing and the current's bearing = 65°

We first convert the power boat speed from knots to km/hr:

Power boat speed = 24 knots × 1.852 km/hr

≈ 44.448 km/hr

To find the resultant speed, we can use the Pythagorean theorem:

Resultant speed = √((Power boat speed)² + (Tidal current speed)²)

= √((44.448 km/hr)² + (12 km/hr)²)

≈ 46.621 km/hr

≈ 47 km/hr (rounded to the nearest km/hr)

To find the resultant bearing, we can use trigonometry:

Resultant bearing = arctan((Tidal current speed) / (Power boat speed))

= arctan(12 km/hr / 44.448 km/hr)

≈ 15.582°

≈ 16° (rounded to the nearest degree)

To find the distance traveled after 2.5 hours, we multiply the resultant speed by the time:

Distance = Resultant speed × Time

= 46.621 km/hr × 2.5 hr

≈ 116.553 km

≈ 117 km (rounded to the nearest km)

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It takes more energy to produce a wave with higher crests and deeper troughs, so the more energy a wave has, the greater its amplitude.

The amplitude and energy of a wave are directly proportional to each other. Amplitude refers to the maximum displacement or height of a wave from its resting position, while energy is the ability of the wave to do work or cause a change. As the amplitude of a wave increases, so does its energy because the wave has more potential energy stored in its oscillations. When energy is added to a wave, it increases the amplitude of the wave, and vice versa, when energy is removed from a wave, its amplitude decreases. This relationship is essential in understanding the behavior of waves in various fields, such as acoustics, optics, and seismology. For example, in sound waves, increasing the amplitude of a sound wave increases the volume of the sound because it has more energy to move the air molecules.

The more energy a wave has, the greater its amplitude. Amplitude is a measure of the maximum displacement or height of a wave from its resting position. The energy of a wave is related to its amplitude because a wave with greater amplitude has more potential energy stored in its oscillations. When energy is added to a wave, the amplitude of the wave increases because the extra energy allows the wave to move higher and lower from its resting position. This can be seen in ocean waves, where larger waves have higher crests and deeper troughs, indicating that they have more energy. The relationship between energy and amplitude is important in many fields of science, including acoustics, optics, and seismology, and is used to understand and analyze the behavior of waves in different contexts.

Therefore, The correct answer is"greater".

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