A balloon is a sphere with a radius of 5.0 m. the force of air against the walls of the balloon is 45 n. what is the air pressure inside the balloon?
Answers
The air pressure inside the balloon is: 0.1432 Pa
The formulas and procedures that we will use to solve this problem are:
a = 4 * π * r²P = F/aWhere:
a = area of the spherer = radiusπ = mathematical constantP = PressureF = Forcea = surface areaInformation about the problem:
r = 5.0 mF = 45 N1 Pa = N/m²1 N = kg * m/s²a=?P=?Using the formula of the sphere area we get:
a = 4 * π * r²
a = 4 * 3.1416 * (5.0 m)²
a = 314.16 m²
Applying the pressure formula we get:
P = F/a
P = 45 N/314.16 m²
P = 0.1432 Pa
What is pressure?It is a physical quantity that expresses the force applied on the area of a surface.
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Related Questions
How does changing the mass or speed of a moving object before it collides with
another object affect the forces on those objects during the collision?
PLEASE HURRY
Answers
Answer:
When two objects collide, the forces that are exerted on each other are determined by their masses and speeds. If the mass of one of the objects is increased, the force that it exerts on the other object during the collision will also increase. Similarly, if the speed of one of the objects is increased, the force that it exerts on the other object during the collision will also increase. In general, the greater the mass and speed of an object, the greater the force that it will exert on another object during a collision. However, it is important to note that the direction of the forces will remain the same, regardless of the masses or speeds of the objects involved.
29.In which of the following pictures is the average kinetic energy of molecules the highest?Select one:a. Ab. Bc. Cd. D
Answers
We will have that the picture that shows the highest average kinetic energy is image B.
jimmy and jenny are floating on a quiet river using giant doughnut-shaped tubes. at one point, they are 5.0 m apart when a speed boat passes. after the boat passes, they begin bobbing up and down at a frequency of 0.25 hz. just as jenny reaches her highest level, jimmy is at his lowest level. as it happens, jenny and jimmy are always within one wavelength. what is the speed of these waves?
Answers
Answer:
2.5m/s
Explanation:
From Figure wavelength = ∧=10m
we know that speed of length is the product
of wavelength and frequency
so speed = frequency x wavelength
=\(\frac{0.25}{100}\)×10
= 2.5m/s
Answer speed of wave = 2.5m/s .
The speed of the waves is 5 m/s.
A wave is a disturbance or oscillation that propagates through space and time, transporting energy from one place to another. The physical significance of a wave is represented by its amplitude, wavelength, and frequency.
The speed of the wave can be calculated by the following equation: wave speed = frequency × wavelength.
The wavelength is 20 m, and the frequency is 0.25 Hz.
The speed of the waves can be determined as follows:wavelength = 20 m, frequency = 0.25 Hz
Wave speed = frequency × wavelength= 0.25 × 20= 5 m/s
Therefore, the speed of the waves is 5 m/s.
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what is the critical speed below which the rope woudl becom slack when the bucket reaches the highest point in the circle
Answers
The critical speed below which the rope would become slack when the bucket reaches the highest point in the circle is determined by the length of the rope and the radius of the circle.
When the bucket is at the highest point in the circle, it is momentarily at rest and the tension in the rope must be zero.
The formula for calculating the critical speed at which the rope becomes slack is:
v = √(gr)
where v is the critical speed, g is the acceleration due to gravity, and r is the radius of the circle.
For example, if the radius of the circle is 2 meters and the acceleration due to gravity is 9.8 m/s², the critical speed would be:
v = √(9.8 × 2) = 4.4 m/s
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How deep is the floor of the ocean if a sonar sound takes 7 seconds to return back to the ship?
Answers
As a cell increases in size, its small surface area to volume ratio limits the rate of exchange of materials with its surroundings. a potential solution to this problem is:__________
Answers
A potential solution to the limitation posed by the small surface area to volume ratio of a cell as it increases in size is to divide or compartmentalize the cell into smaller units. This can be achieved through processes such as cell division or the formation of specialized organelles within the cell.
By dividing into smaller units or creating compartments, the cell effectively increases its total surface area relative to its volume. This allows for a larger surface area available for exchange of materials with the surroundings, facilitating more efficient nutrient uptake, waste removal, and gas exchange. Compartmentalization also enables the cell to organize and separate different cellular processes, enhancing their efficiency and specialization.
Overall, dividing or compartmentalizing the cell is a potential solution that helps overcome the limitations of a small surface area to volume ratio, enabling cells to maintain an optimal rate of material exchange with their surroundings as they increase in size.
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3. what are the heat transfer mechanisms involved during heat transfer in a liquid-to-liquid heat exchanger from the hot to the cold fluid?
Answers
The heat transfer mechanisms in a liquid-to-liquid heat exchanger from the hot to the cold fluid include conduction, convection, and radiation. Conduction and convection are the primary mechanisms, while radiation plays a minor role.
The heat transfer mechanisms involved during heat transfer in a liquid-to-liquid heat exchanger from the hot to the cold fluid are conduction, convection, and in some cases, radiation.
1. Conduction: This is the process of heat transfer through direct contact between the hot and cold fluids. The heat moves from the hot fluid to the cold fluid through the solid walls of the heat exchanger.
2. Convection: This mechanism occurs due to the movement of fluids in the heat exchanger. The hot fluid transfers heat to the solid walls of the heat exchanger, and the cold fluid receives the heat from the walls as it flows. The movement of fluids enhances the heat transfer rate.
3. Radiation: Although less significant in liquid-to-liquid heat exchangers, radiation is the transfer of heat through electromagnetic waves. The heat is emitted from the hot fluid and absorbed by the cold fluid without the need for direct contact or fluid movement.
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you may need new shocks if you push down hard on the front and rear of the vehicle and
Answers
If pushing down on the front and rear of the vehicle results in excessive bouncing, it may indicate the need for new shocks.
Pushing down on the front and rear of a vehicle and observing excessive bouncing or rebounding can be an indication that the shocks are worn out or no longer functioning effectively. Shocks, also known as shock absorbers, play a crucial role in controlling the suspension movement of a vehicle. They dampen the oscillations caused by bumps, dips, or sudden movements, providing a smoother and more stable ride. When shocks deteriorate over time, their ability to absorb and control these movements diminishes, resulting in increased bouncing and reduced ride comfort. Therefore, if pushing down on the front and rear of the vehicle produces excessive bouncing, it is recommended to have the shocks inspected and potentially replaced to restore optimal suspension performance and ensure a safer driving experience.
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Which is the first step in the process during the formation of molded fossils?
A.) sediment hardens into rock
B.) sediment is eroded from rock
C.) organisms are buried under sediment
D.) organisms shapes are preserved in rock
Answers
B sediment is eroded from rock
Answer:
B) sediment is eroded from rock
Explanation:
edge 2020
If you're driving one and a half miles per minute, slow down by 15 miles per hour, and then reduce your speed by one third, how fast are you going now?
a.90 miles per hour
b.60 miles per hour
c.50 miles per hour
d.75 miles per hour
e.45 miles per hour
Answers
After slowing down by 15 miles per hour and reducing the speed by one third, you are now going at 60 miles per hour.
What is the current speed after slowing down?If you are initially driving at a rate of one and a half miles per minute, it means you are traveling at a speed of 90 miles per hour (since there are 60 minutes in an hour).
In the second step, you slow down by 15 miles per hour. This reduces your speed to 75 miles per hour.
Finally, you reduce your speed by one third, which means you need to subtract one third of 75 from 75. One third of 75 is 25, so subtracting 25 from 75 gives you a speed of 50 miles per hour.
Therefore, after slowing down by 15 miles per hour and then reducing your speed by one third, you are now traveling at a speed of 50 miles per hour.
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Light is refracted as it travels from a point A in medium 1 to a point B in medium 2. If the index of refraction is 1.33 in medium 1 and 1.57 in medium 2, how long does it take light to go from A to B assuming it travels 335 cm in medium 1 and 151 cm in the medium 2?
Answers
It takes apprοximately 2.28 x 10⁻⁶ secοnds fοr light tο travel frοm pοint A tο pοint B.
How to calculate the time for light to travel?Tο calculate the time it takes fοr light tο travel frοm pοint A tο pοint B, we can use the equatiοn:
Time = Distance / Speed
The speed οf light in a medium can be calculated using the fοrmula:
Speed = c / n
where c is the speed οf light in a vacuum and n is the refractive index οf the medium.
Given:
Distance in medium 1 = 335 cm
Distance in medium 2 = 151 cm
Refractive index οf medium 1 (n1) = 1.33
Refractive index οf medium 2 (n2) = 1.57
First, we need tο calculate the speeds οf light in each medium:
Speed in medium 1 = c / n1
Speed in medium 2 = c / n2
Let's assume the speed οf light in a vacuum (c) is apprοximately 3.0 x 10^8 m/s.
Speed in medium 1 = (3.0 x 10⁸ m/s) / 1.33
Speed in medium 2 = (3.0 x 10⁸ m/s) / 1.57
Next, we can calculate the time it takes fοr light tο travel in each medium:
Time in medium 1 = Distance in medium 1 / Speed in medium 1
Time in medium 2 = Distance in medium 2 / Speed in medium 2
Finally, we can calculate the tοtal time taken by adding the times in each medium:
Tοtal time = Time in medium 1 + Time in medium 2
Nοw, let's plug in the values and calculate the time:
Speed in medium 1 ≈ (3.0 x 10⁸ m/s) / 1.33 ≈ 2.26 x 10⁸ m/s
Speed in medium 2 ≈ (3.0 x 10⁸ m/s) / 1.57 ≈ 1.91 x 10⁸ m/s
Time in medium 1 ≈ (335 cm / 100) / (2.26 x 10⁸ m/s) ≈ 1.49 x 10⁻⁶ s
Time in medium 2 ≈ (151 cm / 100) / (1.91 x 10⁸ m/s) ≈ 7.90 x 10⁻⁷ s
Tοtal time ≈ 1.49 x 10⁻⁶ s + 7.90 x 10⁻⁷ s ≈ 2.28 x 10⁻⁶ s
Therefοre, it takes apprοximately 2.28 x 10⁻⁶ secοnds fοr light tο travel frοm pοint A tο pοint B.
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Two charges one positive and one negative both with a charge of 1.1X10-10 C. They are 10-6 m apart. A third charge which is positive is located half between the first 2 charges, and the third charge is 10-17 C. What is the magnitude of force on the third charge
Answers
The magnitude of the force on the third charge is 1.21 x \(10^-^5\) N, acting along the line between charges.
To calculate the magnitude of the force on the third charge, we can use Coulomb's Law:
F = k * (q1 * q2) / \(r^2\), where
F is the force,
k is the electrostatic constant (8.99 x \(10^9\) N \(m^2\)/\(C^2\)),
q1 and q2 are the charges, and
r is the distance between them.
The third charge is equidistant to both first and second charges.
Therefore, calculate the force between the third charge and each of the other charges separately and then add them vectorially.
The forces from each charge are equal in magnitude, 1.21 x\(10^-^5\) N, and act along the line between charges.
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which movement straightens a joint, returning it to zero position?
Answers
Movement refers to the way people walk, run, or perform other physical activities. The process of changing body place or direction is referred to as movement. The motion of a body segment, such as a limb, is referred to as a movement.
The movement that straightens a joint, returning it to zero position is an extension. The zero position refers to the default, resting position of a joint before any motion occurs. In this position, the joint's anatomical structure is in its most stable and neutral position, allowing for optimal force generation and movement. The extension is the movement of a joint that straightens or opens the angle between the bones or parts of the body. For example, extension is when you move your forearm from a bent position to a straight position. So, extension is the movement that straightens a joint, returning it to zero position. Hence, the answer is an extension.
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If a train approaches you (sitting in the bench ) at a velocity of 35 m/s, what frequency will you hear as it sounds its whistle at 188 Hz? speed of sound= 345 m/sA) 188 HzB) 170.7 HzC) 209.2 HzD) 202.7 Hz
Answers
Given:
The speed of the train is,
\(v_s=35\text{ m/s}\)The actual frequency of the whistle is,
\(f=188\text{ Hz}\)The speed of sound in air is,
\(v=345\text{ m/s}\)To find:
The frequency heard by the observer
Explanation:
The apparent frequency when the train approaches the observer is given by,
\(\begin{gathered} f_{apparent}=f\frac{v}{v-v_s} \\ =188\times\frac{345}{345-35} \\ =188\times\frac{345}{310} \\ =209.2\text{ Hz} \end{gathered}\)Hence, the frequency heard by you is 209.2 Hz.
can ya pls answer dis rq!
Answers
Answer:
I don't even know can u tell me how to ask questions
a 5 kg fish swimming at a speed of 1 m/s swallows an absent-minded 1 kg fish at rest. a. what is the initial total momentum of the system? b. what is the final total momentum of the system? c. what is the speed of the larger fish after this lunch? d. what is the initial total kinetic energy of the system? e. what is the final total kinetic energy of the system? f. calculate the % loss in kinetic energy of the system
Answers
(a) The initial momentum of the system is 5 kg-m/s
(b) Total momentum of the system is 5 kg−m/s
(c) The speed of the larger fish after this lunch is 0.833 m/s
(d) Initial kinetic energy of the system is 2.5J
(e) The final total kinetic energy of the system is 2.08J
(f) The percentage loss in kinetic energy is 16.8%
Inelastic collision:
It is defined as the collision where the object gets collide into one after the collision.
Given that the mass of the larger fish (M) is 5 kg, Mass of the smaller fish (m) is 1 kg, Initial Speed of the larger fish (U) is 1 m/s, the initial speed of the smaller fish (u) = 0 m/s.
(a) The initial momentum of the system
P1 = MU + mu
P1 = 5×1+0
P1 = 5 kg m/s
(b) Total momentum of the system,
P2 = P1
P2 =5 kg−m/s
(c) The speed of the larger fish after this lunch
P2 = (m + M) V
5= (5+1)V
V = 0.833 m/s
(d) Initial kinetic energy of the system
K1=1/2MU^2
K1=0.5×5×1^2
K1= 2.5J
(e) Final kinetic energy of the system
K2=0.5 (m + M) V2
K2=0.5(5+1)(0.833)2
K2= 2.08J
(f) Now, the percentage loss in kinetic energy
ΔK= (K1 −K2/K1) × 100
ΔK= (2.5−2.082.5) × 100
ΔK= 16.8%
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A speaker fixed to a moving platform moves toward a wall, emitting a steady sound with a frequency of 225Hz . A person on the platform right next to the speaker detects the sound waves reflected off the wall and those emitted by the speaker.How fast should the platform move, vp, for the person to detect a beat frequency of 1.00Hz ?
Answers
The speed of the platform so that the person detects a beat frequency of 1.00 Hz is 5.286m/s.
The speaker moving towards the wall is emitting the sound of frequency of 115Hz and the platform right next to the speaker is detecting the sound reflected by the wall and emitted by the speaker.
Now, to find the speed of the platform so that the person here the beta frequency pf 1.00Hz, we will use the relation,
F = (c+v/c-v)f
c = Speed of waves in the medium
u = Speed of the receiver relative to the medium
v = Speed of the source relative to the medium
f = emitted frequency
Our values are given,
Beat frequency = 7Hz
Reflective Doppler frequency = 225+7=232Hz
Putting values,
232 = (c+v/c-v)225
solving further,
v = 5.286 m/s.
So, the speed of the platform shoud be 5.286m/s.
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PLEASE ANSWER FOR BRAINLIEST!! A guitar string vibrates with a frequency of 4 kHz. What is the period of the waves in seconds?
Answers
Answer:
T = 0.00025 secs
Explanation:
Given:
Frequency = 4 kHz = 4000 Hz
Required:
Time Period = ?
Formula:
T = 1/f
Solution:
T = 1/4000
T = 0.00025 secs
Answer:
0.00025 seconds
Explanation:
Time period = 1 / frequency
= 1/4000
= 0.00025 seconds
Hope this helps, and please mark me brainliest if it does!
What type of interaction allows the sidewalk to heat up and cook the egg? absorption diffraction reflection transmission
Answers
By the processes of heat transfer, the sidewalk absorbs heat by radiation and cooks the egg.
What is heat energy?Heat energy is a form of energy that is due to difference in temperature between two bodies.
Heat energy always flow from hotter to colder bodies
The processes of heat transfer include;
conductionconvectionradiationThe sidewalk absorbs heat by radiation and cooks the egg.
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Answer:
absorption
Explanation:
How does rocks and fossils determine Earth's age?
Answers
Answer:
There are two main ways to determine the age of a rock, these are Relative dating and Absolute dating. Relative dating is used to determine the relative order of past events by comparing the age of one object to another.
Explanation:
Explanation:
rock and fossils are made by layers of dirt, sand,organic matter that has beem compressed over thousands,if not millions of years.
some scientists use this layering to determine how old the earth is.
its kind of like looking at the rings of a tree to see how old it is.
the scientists look at each layer of the rock or fossil and use what they already know about when this type of soil or organic matter existed and try to piece together the past
It took 3.5 hours for a train to travel the distance between two cities at a velocity of 120 km/h. How far did the train travel between the two cities?
Answers
Answer: 420 km
Explanation:
120 per hour, 3.5 hours
120 x 3.5 = 420
Which of the following is a true statement?
Ideas can change as new discoveries are made.
New scientists are creating new ideas with or without any evidence,
We have yet to discover how to make a perfect organism,
Scientists have not discovered life forms in other planets.
Answers
Answer:
ideas can change as new discoveries are made.
though "we have yet to discover how to make a perfect organism" is also a valid choice? maybe refer to a textbook or something
which wave carries the highest energy?
Answers
Answer:
Gamma rays
Explanation:
the basic requirement for a fusion reaction is (are)
Answers
The basic requirement for a fusion reaction is a combination of high temperature and pressure, along with a sufficient amount of fuel.
In fusion, the aim is to merge light atomic nuclei, typically isotopes of hydrogen, to form a heavier nucleus and release a tremendous amount of energy. Achieving the necessary conditions involves confining the fuel, such as deuterium and tritium, using powerful magnetic fields or intense laser beams.
These confinement methods ensure that the fuel is heated to millions of degrees, creating a plasma state where atomic collisions occur at high velocities. The high temperature and pressure cause the atomic nuclei to overcome their mutual electrostatic repulsion and merge, releasing energy in the form of light and heat.
Properly sustaining and controlling these conditions are key to realizing controlled fusion reactions, which hold immense potential as a clean and virtually limitless energy source.
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idk how to give brainliest but if you answer me with your favorite tokyo ghoul character you get 50 points
Answers
Answer:
Touka Kirishima <3
Explanation:
Answer:
juuzou
Explanation:
he bad##s
Given a material of specific heat c in Cal/gramC^o and mass 5 grams. If the material is heated from a temperature of 10 C^o to a temperature of 37 C^o then which of these expressions yields the amount of heat added to the material in calories? A)5 times c times (37 - 10) B)5 divided by c times (37 - 10) C)5 times c divided by (37 times 10)
Answers
Given:
The specific heat of the material is c Cal/(gram°C)
The mass of the material, m=5 g
The initial temperature of the material, T₁=10 °C
The final temperature of the material, T₂=37 °C
To find:
The expression for the amount of heat added to the material.
Explanation:
The specific heat of a material is the heat required to raise the temperature of the unit mass of the material by one degree celcius.
From the equation of specific heat, the amount of the heat added to a material is given by,
\(\begin{gathered} Q=mc\Delta T \\ =mc(T_2-T_1) \end{gathered}\)On substituting the known values,
\(Q=5\times c\times(37-10)\text{ calories}\)Final answer:
Thus the correct answer is option A.
How is the answer D?
Answers
The graph that corresponds to 0.1 s in one complete cycle is graph D.
option D is the correct answer.
What is the period of a wave?The period of a wave is the time for a particle on a medium to make one complete vibrational cycle. Period, being a time, is measured in units of time such as seconds, hours, days or years.
Also, the period of a wave is the amount of time it takes for a wave to complete one wave cycle or wavelength.
From the given parameter, the coil rotates 10 times in one second. The period of the coil is calculated as;
Period = 1 s / 10
Period = 0.1 s
From the graphs, the only option that has one complete cycle in one second is option D.
Check option D, half cycle is 0.05 s and one full cycle is 0.1 s.
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consider a charged parallel-plate capacitor. which combination of changes would quadruple its capacitance?
Answers
Its capacitance Double the charge and double the plate area.
Doubling the distance between the plates of a capacitor double the capacitance. Doubling the distance between the plates of a capacitor quadruples the capacitance. As the distance between the plates decreases, the capacitance increases because the potential difference decreases.
Halving the distance between the plates of a parallel plate capacitor doubles the capacitance of the capacitor from its initial capacitance. When two or more capacitors are connected in parallel, the overall effect is that of a single equivalent capacitor with the sum of the plate areas of the individual capacitors. As we saw earlier all other factors being equal, more disk space equals more capacity.
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If M is 10 kg and Fa = 100N and there is no friction, what will the acceleration of M be?
Answers
Answer:
10m/s^2
Explanation:
Newton's second law:
F=ma
100=10×a
a=10m/s^2
A train travels 9 meters in the first second of travel, 9 meters again during the second second of travel, and 9 meters again during the third second. What is its acceleration?
Answers
Answer:
Zero
Explanation:
Acceleration is defined as the rate of change in speed. The speed during the first second is 9m/1s = 9m/s. During the second second is again 9m/1s = 9m/s and again 9m/s for the third second. Being the speed the same, the acceleration is 0