A plastic soda bottle is empty and sits out in the sun, heating the air inside. Now you put the cap on tightly and put the bottle in the fridge. What happens to the bottle as it cools
Answers
When a plastic soda bottle is empty and left out in the sun, it heats up the air inside. Afterward, the cap is placed tightly on the bottle and is put in the fridge the bottle starts to shrinks when it cools
When a plastic soda bottle is empty and left out in the sun, it heats up the air inside. Afterward, the cap is placed tightly on the bottle and is put in the fridge. The cooling effect that takes place inside the fridge causes the bottle to shrink. What happens to the bottle as it cools?
The bottle shrinks when it cools. The cooling effect causes the air inside the bottle to contract, and this causes a reduction in the size of the bottle. As the temperature inside the fridge is cooler than the temperature outside the fridge, the pressure in the bottle decreases. As a result, the bottle is less stretched than it was before.
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Related Questions
calculate the wavelength (in m) of a 650.00 hz sound in air at room temperature and pressure, where the velocity of sound is 344 m/s.
Answers
The wavelength of a 650.00 Hz sound in air at room temperature and pressure, where the velocity of sound is 344 m/s, is approximately 0.529 m.
What is the wavelength of a 650.00 Hz sound in air at room temperature and pressure?Sound waves travel through a medium by creating compressions and rarefactions. The wavelength of a sound wave is the distance between two consecutive points that are in phase, such as two compressions or two rarefactions. To calculate the wavelength, we can use the formula: wavelength = velocity of sound / frequency.
In this case, the frequency of the sound is 650.00 Hz, and the velocity of sound in air at room temperature and pressure is 344 m/s. Plugging these values into the formula, we get: wavelength = 344 m/s / 650.00 Hz = 0.529 m.
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an electric adapter for a notebook computer (converting 110 volts to 19 volts) operates 10oc warmer than the surrounding temperature. determine the sign (positive: 1; negative: -1; none: 0) of (a) wext and (b) q interactions
Answers
The sign of (a) the work interaction and (b) the heat interaction for an electric adapter for a notebook computer (converting 110 volts to 19 volts) operating 10°C warmer than the surrounding temperature is positive.
Similarly, the adapter is releasing heat into the surrounding environment, so the heat interaction is also positive.
The sign of the interactions in this situation can be determined by examining the direction of energy transfer.
(a) Wext: In this case, the electric adapter is doing work on the notebook computer by converting the 110 volts to 19 volts. Therefore, the sign of Wext is positive (1).
(b) Q: The electric adapter is operating 10°C warmer than the surrounding temperature, which means that it is transferring heat to the surroundings. Therefore, the sign of Q is negative (-1).
Overall, the sign of Wext is positive (1) and the sign of Q is negative (-1) in this situation.
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a skydiver jumps out of an airplane and quickly reaches a terminal velocity of 180 miles per hour. her combined weight including the parachute in her backpack is 200 pounds. what is the drag force? after she opens the parachute, she quickly decelerates and reaches the slower terminal velocity of 10 miles per hour. did the drag force change? if so, by how much?
Answers
The drag force on the skydiver at terminal velocity is 72.8 pounds.
This can be calculated by using the formula for drag force, which states that drag force is equal to the drag coefficient multiplied by the density of the fluid (in this case, air), multiplied by the velocity of the object squared, multiplied by the cross-sectional area of the object. At terminal velocity, the drag force acting on the skydiver is equal to the weight of the skydiver, which is 200 pounds. Therefore, the drag force on the skydiver is approximately 72.8 pounds.
Fd = 0.5 × ρ × Cd × A × V²
where Fd is the drag force, ρ is the density of air, Cd is the drag coefficient, A is the cross-sectional area of the skydiver, and V is the velocity.
Substituting the given velocity of 180 miles per hour (or 80.5 m/s) and solving for the drag force, we get:
Fd = 0.5 × 1.2 kg/m³ × 1.0 × 0.7 m² × (80.5 m/s)²
= 633 lbs
After opening the parachute, the cross-sectional area of the skydiver increases, which decreases the terminal velocity. Assuming the same drag coefficient and air density, but with a cross-sectional area of 4.6 m², we can use the same formula to find the new drag force at 10 miles per hour (or 4.47 m/s):
Fd' = 0.5 × 1.2 kg/m³ × 1.0 × 4.6 m² × (4.47 m/s)²
= 72.8 lbs
After opening the parachute, the skydiver experiences a significantly increased drag force, causing her to decelerate rapidly and reach a much slower terminal velocity of 10 miles per hour. The drag force increases because the cross-sectional area of the skydiver and parachute combination is much larger than just the skydiver alone, and the parachute also increases the drag coefficient.
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Q3.
A student investigated how the mass of water in an electric kettle affected the time taken for the water to reach boiling point.
The kettle switched off when the water reached boiling point.
Figure 1 shows the kettle.
(a) The heating element of the kettle was connected to the mains supply.
Explain why the temperature of the heating element increased.
(2)
(b) Give one variable that the student should have controlled.
Answers
The student should have controlled the power of the mains supply, as this affects the amount of energy transferred to the heating element and the rate at which it increases in temperature.
What is heating element?A heating element is a device that produces heat by converting electrical energy into heat energy. It is commonly found in electric heaters, stoves, ovens, toasters, and other appliances. The heating element works by passing an electric current through a coil of wire or metal, typically made of nickel-chromium or iron-chromium alloy. When the current passes through the coil, it produces heat as a result of resistance to the flow of current. The heat is then transferred through the surrounding material and into the air. Heating elements are usually designed to operate at a certain temperature, and when this temperature is reached, the element turns off automatically. Heating elements are important components of many household appliances and are used to provide a safe and efficient source of heat.
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Spring tides occurs at two of the time shown which two? how do u know ?
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Spring tides are extremely wide ranges of tidal highs and lows that occur during full moon or new moon phases when the gravitational forces of the Sun and Moon are at their strongest.
Neap tides are characterized by lower high tides and higher low tides, while spring tides feature higher high tides and lower low tides. Because of this, a spring tide has a significantly wider range than a low tide (the difference in water level between high and low tide).Spring tides are the tides that occur right after a new or full moon when the difference between high and low water is the biggest. The earth, moon, and sun are in a straight line at this time, causing the gravitational pull to be at its strongest. There are more high tides than usual and fewer low tides than usual.To know more about spring tides
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In ______ schemes, the voltage level oscillates between a positive and a negative value although it may remain at zero level between the two values.
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In bipolar schemes, the voltage level oscillates between a positive and a negative value, and it may also remain at zero level between these two values.
Bipolar schemes are commonly used in electronic systems for digital data transmission or analog signal modulation. In these schemes, the voltage polarity alternates to represent binary digits or encode information.
This allows for efficient transmission and reliable detection of the signal. Bipolar schemes are widely employed in various communication technologies, such as Ethernet, RS-232, and T-carrier systems. They provide a balanced approach to signal representation, ensuring accurate and robust data communication. In bipolar schemes, the voltage oscillates between positive and negative values, with the potential of staying at zero in between.
These schemes are used in electronic systems for transmitting digital data or encoding analog signals. Bipolar schemes enable reliable signal detection and efficient transmission, making them prevalent in communication technologies like Ethernet and RS-232.
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What are the five types of contact forces?
Answers
Answer:
Applied force
Normal force
Frictional force
Tension force
Wind force
Answer: Reaction force. An object at rest on a surface experiences reaction force .
Tension. An object that is being stretched experiences a tension force.
Friction. Two objects sliding past each other experience friction forces. ...
Air resistance. An object moving through the air experiences air resistance .
Gravitational Force.
Explanation:
PLZ PLZ PLZ PLZ PLZ PLZ PLZ HELPPPPPPPPPPPPPPPPP
Answers
Answer:
endoplasmic reticulum
the rate at which sound waves vibrate and move is referred to as ______.
Answers
The rate at which sound waves vibrate and move is referred to as frequency.
Sound waves are created when an object vibrates and creates pressure variations in the air. These pressure variations are propagated as waves that travel through the air or other mediums such as water or solid objects.
The frequency of a sound wave is defined as how many times per second the item vibrates back and forth.
This vibration produces cycles of compressions and rarefactions in the air, creating a sound wave with a specific frequency.
Hertz (Hz), a unit of measurement for frequency, is used to express the frequency of a sound pulse.
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The coefficient of friction between the wheels of Yamaha motorcycle and the dry pavement is 0.88. An animal walks out into the road, causing a motorcyclist to slam on the brakes. The wheels stop turning, but the tires skid along the road, causing intense friction and heat.
Determine the magnitude (positive) of the acceleration which the 196-kg motorcycle experiences while skidding to a stop. The mass includes the rider.
Answer: ____ m/s/s (or m/s^2)
Answers
To determine the magnitude of the acceleration of the motorcycle, we need to know the force of friction acting on the wheels. The force of friction is equal to the coefficient of friction multiplied by the normal force acting on the wheels, which is equal to the weight of the motorcycle and rider. The weight of the motorcycle and rider can be calculated by multiplying the mass by the acceleration due to gravity (9.8 m/s^2). So, the force of friction acting on the wheels of the motorcycle is equal to 0.88 * 196 kg * 9.8 m/s^2 = 1661.28 N.
The acceleration of the motorcycle is equal to the force of friction divided by the mass of the motorcycle and rider. So, the acceleration of the motorcycle is equal to 1661.28 N / 196 kg = 8.45 m/s^2.
Answer: 8.45 m/s^2
Please someone answer this quickly!! I'll give 20 points for it, I just need the answers :)
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The potential energy of the person mass 95 Kg sitting on top of a slid 3 m high is 2795.85 J
How do i determine the potential energy of the person?The following data were obtained from the question:
Mass of person (m) = 95 KgHeight of slid (h) = 3 mAcceleration due to gravity (g) = 9.81 m/s² Potential energy of person (PE) = ?The potential energy of the person can be obtained as follow:
PE = mgh
Inputting the given parameters, we have:
= 95 × 9.81 × 3
= 2795.85 J
Thus, the potential energy of the person is 2795.85 J
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A scientific theory is_____.
A. A well-tested explanation for a broad set of observations
B. A well-tested explanation for a widely accepted hypothesis
C. A proven explanation for the results of multiple experiments
D. A hypothesis that has stood the test of time
Answers
Answer:
B. A well-tested explanation for a widely accepted hypothesis
Explanation:
This is true about a scientific theory going by the fact of it being a well tested explanation. For example, in one of the Newtons law of motion which he stated to be "To every action, there is equal and opposite reaction", the hypothesis has been known till he was able to offer a well tested explanations with calculations showing that, it was actually true.
NEED HELP FAST!!!! Please answer both questions
Answers
Answer:
1. 0.102 mol/kg.
2. 0.444 mol/kg.
Explanation:
Work on 1.To calculate molality, we need to know the moles of solute (NaCl) and the mass of the solvent (water) in kilograms. First, we need to convert the mass of NaCl to moles by dividing by its molar mass. Then we convert the mass of water to kilograms. Molality (m) is equal to moles of solute divided by kilograms of solvent.
Work on 2.
First, we need to convert the mass of glucose to moles by dividing by its molar mass. Then we convert the volume of water to kilograms. Molality (m) is equal to moles of solute divided by kilograms of solvent. Finally, we need to round the answer to three significant figures.
Which statements correctly identify chart of Earth and Jupiter?
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Answer:
b
Explanation:
Answer:
The first box, second box, and fourth box are correct. I think the fifth might be correct...not completley sure about the fifth box.
Explanation:
Look at photo D. Explain how the fountains help to keep the gardens cool.
Answers
Answer with Explanation:
Spain is known to have hot summers, thus, it is very easy for water to evaporate once exposed to direct heat source (such as the sun).
A fountain is being used in order to keep the garden's surrounding air temperature low by allowing the evaporation of water. One factor that speeds up the evaporation of water is the surface area. The water coming out of a fountain is in small quantities; however, it meets up with hot air in a large surface area. This allows faster evaporation, leading to an even greater cooling effect because heat is being transported immediately from the liquid state to the gaseous state. This is the reason why people often meet up in places where there's a fountain. It is not only aesthetically appealing but also provides comfort from the heat.
relative to sphere at the speed of sphere Z is _ m/s
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We are given that a sphere Z moves with a relative speed of 1 m/s with respect to sphere X which moves at 5 m/s. Let's draw the velocity vectors of the spheres:
Where:
\(\begin{gathered} v_x=\text{ velocity of sphere x} \\ v_z=\text{ velocity of sphere z} \end{gathered}\)From the relative velocity equation we have:
\(v_z=v_r+v_x\)Where:
\(v_r=\text{ velocity of z relative to x}\)Since we are given the relative velocity we can plug in the values to get the velocity of "z":
\(\begin{gathered} v_z=1\frac{m}{s}+5\frac{m}{s} \\ \\ v_z=6\frac{m}{s}_{} \end{gathered}\)Now, we do the same but now using the sphere Y:
Now, we use the relative velocity equation for these velocities:
\(v_z=v_r+v_y\)In this case, we have that:
\(v_r=\text{ velocity of z with respect to y}\)Now, we subtract the velocity of "y" from both sides:
\(v_z-v_y=v_r\)Substituting the values:
\(6\frac{m}{s}-2\frac{m}{s}=v_r\)Solving the operations:
\(4\frac{m}{s}=v_r\)Therefore, the velocity of "Z" relative to "Y" is 4 m/s.
Will give brainliest!! How would you write the direction of the vector above as a global angle?
Answers
Answer:
Assuming they're unit vectors (length of 1)
You simply add them together.
The vector pointing right can be described with X and Y
(1, 0).
The vector pointing down
(0, -1).
The numbers are taken from the axis in X and Y directions.
If you add them together you get a final vector.
(1, - 1)
This gives you -45° pointing South East.
Or 360°-45°=315°
It is important to be careful when using nonrenewable resources because
A
there is a limited supply of them and we can’t make any more.
B
harnessing their energy is a very dangerous process.
C
they are more likely to produce excess thermal energy that we can’t use.
D
there is a possibility of finding dinosaur bones in petroleum or coal deposits.
Answers
Answer:
The answer is A because it is a resource that takes many many years to make more of and we cannot make it ourselves
What do you like about science?
Answers
Answer:
nngh have
bjruh hjrhhj be rnrnnrnrnnnrnjrjnnnnnnnnrnrn n n and I was nrn
Explanation:
jbbbbbhhhjjnnnnnnnnnnjhvcc
Explanation:
how can being physically fit help you emotionally
Answers
Starting at a position of 10m [W] of your car, you run to a position of 150m [W] of your car in 35s. What was your
velocity?
Answers
Answer:
4 m/s
Explanation:
you moved 140 meters in 35 seconds
v = 140 / 35 = 4 m/s
What is the formula of gravity?
Answers
Answer:
F=Gm1m2 / r2
Explanation:
F = force
G = gravitational constant
m_1 = mass of object 1
m_2 = mass of object 2
r = distance between centres of the masses
answer is in the attachment
☆...hope this helps...☆
_♡_mashi_♡_
If you were to build a pipe organ with open-tube pipes spanning the range from 25 hz to 19 khz. The speed of sound in air is 343 m/s
Answers
Building a pipe organ with open-tube pipes spanning the range from 25 hz to 19 khz will require the length of the shortest pipe to be 0.018m
What is Length?This is defined as the measurement or extent of a substance from end to end. The formula is shown below:
L = v/f where v is speed , f is frequency
f1 = 25hz , f2 = 19khz
The length for both sides is seen below:
l1 = 343/25 = 13.72m
l2 = 343/19000 = 0.018m.
The length of the shortest pipe is therefore 0.018m.
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The frequency of a repeated event is the number of occurrences per unit of time. The length of the shortest pipe is 0.018 m.
What is the frequency?The frequency of a repeated event is the number of occurrences per unit of time. It is also known as temporal frequency to distinguish it from spatial frequency, and ordinary frequency to distinguish it from angular frequency.
The formula of the length is given by the formula,
\(L=\dfrac vf\)
where v is the velocity of the substance and f is the frequency.
Given that the speed of the sound in air is 343 m/sec, while the frequency is tanging from 25Hz to 19 kHz.
Therefore, the length of the pipe will be,
\(L=\dfrac vf\\\\L_1=\dfrac{343}{25} = 13.72\rm\ m\)
\(L_2=\dfrac{343}{19 \times 1000} = 0.018\rm\ m\)
Hence, the length of the shortest pipe is 0.018 m.
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Why is that when a small marble hits another small marble, it moves, but when a small marble hits a bigger marble, it does not?
Answers
Answer:
It depends on the masses of the marbles that collide. The figure shows a marble with a smaller mass hitting a marble with a larger mass. The larger marble is at rest. After the collision, the marble with a smaller mass bounces off in the opposite directions
hope this helps :)
The use of magnetic fields to control charged particles in machines such as tokamaks and particle accelerators is called which of the following? Select one:a.magnetic inductionb.electromotive force c.magnetic resonanced.magnetic containment
Answers
Used in generators and electric motors, electromagnetic induction explains how a changing magnetic field can produce an electric current and, conversely, how an electric current generates a magnetic field around it. The most accurate option is:
a.
1. A continuous wave with a wavelength of 43 m is traveling through air at 329 m/s. If another wave, with twice the frequency of the first, is traveling through the same medium what is the wavelength of the second wave?
2. Two waves are traveling through the air simultaneously. Wave 1 has a frequency of 541 Hz and a wavelength of 9.81 m. Wave 2 has a wavelength of 9.34 m. What is the frequency of wave 2?
Answers
v = λf
where v is the speed of the wave, λ is the wavelength, and f is the frequency. Solving for the frequency, we get:
f = v/λ = 329 m/s / 43 m = 7.65 Hz
The frequency of the second wave is twice that of the first wave, so its frequency is:
f' = 2f = 2(7.65 Hz) = 15.3 Hz
To find the wavelength of the second wave, we use the same formula:
v = λ'f'
where λ' is the wavelength of the second wave. Solving for λ', we get:
λ' = v/f' = 329 m/s / 15.3 Hz = 21.5 m
Therefore, the wavelength of the second wave is 21.5 m.
2. The speed of the wave is equal to the wavelength times the frequency. For wave 1, we have:
v = λf = 541 Hz * 9.81 m = 5310.21 m/s
For wave 2, we know the wavelength, but not the frequency. We can rearrange the formula to solve for the frequency:
f = v/λ = 5310.21 m/s / 9.34 m = 568.8 Hz
Therefore, the frequency of wave 2 is 568.8 Hz.
To understand the terms in the doppler shift formula.
the doppler shift formula gives the frequency fl at which a listener l hears the sound emitted by a source s at frequency fs:
fl=fsv+vlv+vs,
where v is the speed of sound in the medium, vl is the velocity of the listener, and vs is the velocity of source.
part f now, imagine that the source is to the left of the listener, so that the positive reference direction is in the ?x direction. if the source is stationary, what value does fl approach as the listener's speed (moving in the +x direction) approaches the speed of sound?
a) 0 b) 1/2 fs c) 2fs d) it approaches infinitly
part g in this last case, imagine that the listener is stationary and the source is moving toward the listener at the speed of sound. (note that it is irrelevant whether the source is moving to the right or to the left.) what is fl when the sound waves reach the listener?
a) 0 b) 1/2 fs c) 2fs d) it approaches infinitly
Answers
The Doppler shift approaches 0 as the listener's speed approaches the speed of sound.
In the Doppler shift formula, what value does the frequency (fl) approach as the listener's speed approaches the speed of sound when the source is stationary?In part f of the question, when the source is stationary and the listener is moving towards the source at the speed of sound, the formula for the Doppler shift becomes:
\(fl = fsv + vlv + vs\)
Since the source is stationary (vs = 0) and the listener's speed (vl) approaches the speed of sound (v), the term vlv approaches v². Therefore, the Doppler shift frequency (fl) approaches 0 as the listener's speed approaches the speed of sound.
Hence, the answer to part f is a) 0.
In part g, when the listener is stationary and the source is moving towards the listener at the speed of sound, the formula for the Doppler shift remains the same:
\(fl = fsv + vlv + vs\)
In this case, since the listener is stationary (vl = 0) and the source is moving towards the listener at the speed of sound (vs = v), the term vsv becomes v². Therefore, the Doppler shift frequency (fl) will be twice the emitted frequency (2fs) when the sound waves reach the listener.
Hence, the answer to part g is c) 2fs.
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what is the standard unit for measuring temperature in the metric system?
Answers
The metric system uses Celsius as the primary unit of measurement for temperature.
Nearly all nations in the world use the metric system as their official unit of measurement, which includes Celsius. The Celsius scale is used to measure temperature in most scientific disciplines. The freezing point of water is zero degrees Celsius, and the boiling point is one hundred degrees Celsius. By the middle of the 20th century, Celsius, the most widely used temperature unit in the modern metric system, had been adopted by the majority of the world. Anders Celsius, a Swedish astronomer, created the Celsius scale in 1742.
Most places in the globe measure temperature using the Celsius system (°C). The historical development of this empirical scale led to the definition of its zero point, 0 °C, as the freezing point.
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An airplane is flying north with an airspeed of 200 km/h when it encounters a crosswind of 70 km/h toward the east. which expression gives the resultant speed of airplane?
Answers
Answer:
211.89 km/h
Explanation:
Given that,
The speed of an airplance in North direction = 200 km/h
Speed in East direction = 70 km/h
We need to find the resultant speed of the airplane. It can be calculated as the resultant of the two velocities as follows :
\(v=\sqrt{200^2+70^2} \\\\=211.89\ km/h\)
So, the required speed is 211.89 km/h.
If earth rotated twice as fast as it currently does, but its motion around the sun stayed the same, then.
Answers
Answer: (b) the night would be half as long
Explanation: As the earth, if rotated twice as fast than it does now and the sun stayed the same then the night would be as half as long as the rotation of the planet on its axis would be double to that of its and 12 hours of night would be as long as the speed of the axial rotation.