An empty gas balloon has a mass of 500 kg. The balloon is filled with 3000m^3 of helium gas, at standard temperature and pressure (STP). If the densities of air and helium, at STP are 1.3kgm ^ - 3 and 0.18 kgm^ -3 respectively. Calculate the resultant force acting on the balloon. [g = 10N / Kg]
The resultant force acting on the balloon is 10,400 N.
Resultant force acting on the balloonThe resultant force acting on the balloon is calculated by applying Newton's second law of motion as follows;
F = ma
where;
m is massa is accelerationMass of the helium gas = density x volume
= 0.18 x 3000
= 540 kg
Total mass of the balloon = 500 kg + 540 kg = 1,040 kg
Resultant force = mg
Resultant force = 1040 x 10 = 10,400 N
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What does Einstein's famous equation for nuclear energy, E=mc2, mean?
Mass and energy are produced in a nuclear reaction.
Mass and energy are destroyed in a nuclear reaction.
Some mass and energy are lost in a nuclear reaction.
Some mass is converted into energy in a nuclear reaction.
Answer:
1.It's the world's most famous equation, but what does it really mean? "Energy equals mass times the speed of light squared." On the most basic level, the equation says that energy and mass (matter) are interchangeable; they are different forms of the same thing.
2.The process releases energy because the total mass of the resulting single nucleus is less than the mass of the two original nuclei.
3.In nuclear reactions, mass is never conserved—some mass is exchanged for energy and energy for mass. Nuclear reactions take place in an atom's nucleus. In a spontaneous nuclear reaction, such as radioactive decay, mass is "lost" and appears as energy in the form of particles or gamma rays.
4.In a nuclear reaction, mass decreases and energy increases. The sum of mass and energy is always conserved in a nuclear reaction.
5.The process releases energy because the total mass of the resulting single nucleus is less than the mass of the two original nuclei.
Explanation:
hope it helps
A 2. 0 kg ball is dropped from a rest 10m above the ground. How fast will the ball hit the ground
Answer:
A little over a second
Explanation:
gravity pulls down on objects at a speed of 9.8 meters a second
2. What factor determines the path a star will take in its post-main sequence?
O amount of light
O gravitational pull
Omass
O number of hydrogen molecules
Gravity is a non-contact force since the two objects don't have to be touching to feel the force of gravity. How can you increase the force of gravity? Select all that apply.
decrease the mass of both of the objects 50 points
increase the distance between the objects
decrease the distance between the objects.
increase the mass of one of the objects
Answers:
decrease the distance between the objects.
increase the mass of one of the objects
Explanation: I took the test and this was the right answer
Most of the mass of the galaxy is located at the galactic center in the form of a massive black hole. True False
Answer:
The Galactic Center (or Galactic Centre) is the rotational center, the barycenter, of the Milky Way galaxy. Its central massive object is a supermassive black hole of about 4 million solar masses, which powers Sagittarius A*, a compact radio source which is almost exactly at the galactic rotational center.
How does the interference of sound waves make sounds louder or softer?
Answer:
Changing the amplitude of a sound wave changes its loudness or intensity.
Explanation:
Constructive interference is what can make a sound louder, destructive interference will make a sound quieter. Two waves that add together may have different frequencies.
Refer to energy and refer to water molecules, describe what is happening when ice is at -10 °C is warming up to ice at 0°C?
Answer: in ice 0 Celsius in the melting point, in water 0 Celsius is the freezing point. so when ice is warming up, at 0 Celsius Particles in ice gain enough energy to break the forces of attractions keeping the as solid, at 0Celsius ice starts to melt.
Explanation:
Mrs. Fatima has a a small sports car that she uses to drop her kids off from school that has a mass of 5000 kg. Mr. Zaid drives a truck with a mass of 4200 kg. If the two vehicles are travelling down the road, side by side, at a speed of 75 km/hr, which one will have the most momentum? Explain *
[tex]\textbf{Use equation of momentum}[/tex]
[tex]p=mv[/tex]
[tex]\text{momentum\ =\ mass x velocity}[/tex]
[tex]\textbf{Substitute in the values}[/tex]
[tex]5000 \times 75 = 375,000 \text{\ kg\ km/hr}[/tex]
[tex]4200 \times 75 = 315,000 \text{\ kg\ km/hr}[/tex]
[tex]\textbf{The\ small\ sports\ car\ will\ have\ the\ most\ momentum.}[/tex]
Describe the following mixtures by checking all of the terms that apply. Blood homogeneous heterogeneous solution colloid suspension.
A colloid is a combination in which one material is suspended throughout another substance and contains scattered insoluble particles. Blood is a colloid solution.
What is a colloidal solution?A colloid is a combination in which one material is suspended throughout another substance and contains scattered insoluble particles. The whole combination is referred to as a colloidal solution.
A colloid contains a dispersed phase a continuous phase. The colloidal mixture must either not settle or settle extremely slowly.
The above property is shown by the blood. Hence blood is a colloid solution.
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Answer:
heterogeneous , suspension
Explanation: believe me or don't idc
What is the difference between reflective and refractive telescope?
Answer:
Refractors telescopes utilize specially designed lenses to focus the light on an image. A Reflector telescope uses mirrors, which causes light to reflect at different angles within the optical tube and extends the overall light path.
Answer:
The reflective telescope uses mirrors to catch light and reflect it to the eyepiece. A refractive telescope is kinda' the same except it can focus in on the light.
Explanation:
what happens to heat energy after an object is cooled down lolololol asking for my bff
Answer:
Heat energy does not cool. Objects cool. Energy is not an object. Now, what happens when an object cools is that it gives off some of its thermal energy by one or more mechanisms: radiation, conduction, or convection. In radiation the energy escaped the object as electromagnetic waves - you see the red hot poker slowly dim as it cools, in conduction the energy is transferred Mechanically by the atoms of the hot object being in physical contact with those of the cool object and in convection the hot material moves to a cooler region where it gives up its heat energy by either radiation or conduction.
5. A 200 m long aluminum wire has the same resistance and cross-sectional area as a carbon wire. What is
the length of the carbon wire?
Answer:
=0.15m
Explanation:
l
C
=l
Al
ρ
C
ρ
Al
=200∗
3.5∗10
−5
2.65∗10
−8
Help needed!
Giving Brainliest and 15 points!
Answer:
the 2nd one
Explanation:
The digestive system of most flatworms is incomplete, having an aperture called the "mouth" that is also utilized to remove digestive system wastes.
**Compare a water molecule, H2O, to a carbon dioxide molecule, CO2.**
Which statement is true?
They are made from the same types of atoms combined in the same way.
They are made from different types of atoms, combined in the same way.
They are made from the same types of atoms, but combine in different ways.
They are made from different types of atoms, combined in different ways.
Answer: The answer to this question is: They are made from different types of atoms, combined in different ways.
The statement is true for the comparison of the water molecule, H2O, to a carbon dioxide molecule, CO2.
They are made from different types of atoms, combined in different ways.
Therefore the correct answer is option D
What is a Chemical compound?A chemical compound is a combination of two or more either similar or dissimilar chemical elements.
For example, H₂O is a chemical compound made up of two oxygen atoms and a single hydrogen atom.
The assertion is accurate when comparing the molecules of water and carbon dioxide, H2O, and CO2, respectively.
They are composed of several atom kinds that have been assembled in various ways.
Option D is the right response as a result.
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A charge of 1. 5 µC is placed on the plates of a parallel plate capacitor. The change in voltage across the plates is 36 V. How much potential energy is stored in the capacitor? × 10–5 J.
It is a type capacitor is in which two metal plates arranged in such a way so that they are connected in parallel . The potential energy is stored in the capacitor will be 2.7×10⁻⁵.
What is parallel plate capacitor ?It is an type capacitor is an in which two metal plates arranged in such a way so that they are connected in parallel and have some distance between them.
A dielectric medium is a must in between these plates. helps to stop the flow of electric current through it due to its non-conductive nature .
The given data in the problem is;
Q is the charge= 1.5 µC
V is the change in voltage across the plates is = 36 V.
U is the potential energy=?
The formula for the potential energy is given by;
[tex]\rm U= \frac{1}{2} \times Q \times V \\\\ \rm U= \frac{1}{2} \times 1.5\times 10^{-6} \times 36 \\\\ \rm U=2.7\times10^{-5}[/tex]
Hence the potential energy is stored in the capacitor will be 2.7×10⁻⁵.
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What causes comets to move through the solar system?.
I study in astronymy in College I had a question like this.
Long-period comets are set in motion towards the Sun from the Oort cloud by gravitational perturbations caused by passing stars and the galactic tide. Hyperbolic comets may pass once through the inner Solar System before being flung to interstellar space. The appearance of a comet is called an apparition.
Explain which culture’s values more closely match your own, and why.Briefly explain why experiments having faulty design or inconsistent data are problems for scientists. List several reasons
Answer:
The two main reasons that your results might not match up each time are uncontrolled conditions and experimental error.
someone please answer this, ill give you brainliest and your getting 100 points.
Answer:
b) Asthenosphere
Explanation:
The Earths crust is broken into plates. These plates float on the Asthenosphere. This is observed in the diagram.
They float on asthenosphere
D is the inner core (Very hot place)C is the outer core E is Mantal section .What has more KE, a 3 kg mass at 5 m/s or a 2 kg mass at 8 m/s?
The radder clocked sonic going 300 miles per hour how long will it take him to go 48.1 miles from Miami to Florida
Answer:
9.62 minutes 0r 0.16 of an hour
Explanation:
Speed = distance/time
300mph = 48.1 m/t
xt
300t = 48.1
÷300
t = 48.1/300
t = 0.16033333333 hr
0.16033333333 x 60 = 9.62 minutes
60 minutes in an hour
9.62/60= 0.16033333333 hr
So, around 10 minutes.
Hope this helps!
What is meant by the statement The linear expansivity of a solid is
[tex] 1.0 \times { 10}^{ - 5}{k}^{ - 1} [/tex]
Explanation:
A unit length of the solid will expand in length by a fraction 1.0 × 10^-5 of the original per kelvin rise in temperature
What are nebulas, and how are they affected by gravity?.
In a parallel circuit, what’s happens to the current through each resistor when the voltage is doubled?
A. The current is doubled
B. The current is decreased by half
C. The current remains constant
Answer:
A
Explanation:
Voltage, V = Current, I x Resistance, R (V is directly proportional to I where R is constant of proportionality)
This means that when Voltage is increased, Current increases and when voltage is decreased, current decreases (and the inverse is true). Through all this though, resistance remains constant regardless.
Tori is using her working memory to complete a math problem in her calculus class. She also must retrieve a formula to be able to complete the problem. The primary area of the brain she is using is called the:
The primary area of the brain she is using is called the frontal cortex. It works combined with the hippocampus.
What is the frontal cortex?The frontal cortex or frontal lobe refers to a region of the cerebral cortex in the brain, which can be divided into the medial and lateral frontal cortex.
The frontal cortex is involved in major executive functions including, among others, cognitive skills, working memory, etc.
The frontal cortex works combined with the hippocampus to solve arithmetic mathematical problems.
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WHAT IS SOUND? EXPLAIN ITS WAVES
Answer:
sound is made up of vibrations or sound waves that we can hear these sound waves are formed by objects
Answer:
Sound wave consists to vibrating particles.These knock into other particles causing them to vibrate,and so the sound can travel away from the source.You can hear sound because the vibration in the air cause your ear drums to vibrate this vibration is converted into signals which travel down a nerve to your brain.
Explanation:
hpe its help
What animal plays an important role in aerating, consuming, and recycling the soil?
snakes
earthworms
grasshoppers
salamanders
Answer:
Earthworms
Explanation:
I hope this answer helps
What is the role of greenhouse gases, movement of
energy around earth?
Explanation:
With the natural greenhouse effect, the energy budget is balanced as thermal radiation is re-radiated towards the ground, trapping thermal energy and warming the Earth.Energy from the sun heats Earth's surface, warms the atmosphere, provides energy for photosynthesis, causes evaporation, drives the weather and water cycles, and powers the ocean currents.If you drop a rock from a great height, about how fast will it be falling after 5 seconds, neglecting air resistance?.
Answer:
v = 49.05 m/s^2
Explanation:
Let's use the uniform acceleration equation to find our final velocity.
[tex]v = u + at[/tex]
v = final velocity
u = initial velocity
a = gravitational acceleration
t = time taken
Assuming the rock is at rest initially, u becomes zero.
[tex]v = 0 + 9.81(5)[/tex]
[tex]v = 49.05 m/s^2[/tex]
PLS HURRY
Exporting agribusiness technology to developing countries is likely to increase the availability of food while reducing the stability of traditional________
who are currently the primary farming population.
Specialized technology works well in_________ where the uniformity of the crop encourages tight-focused machines rather than unspecialized machines that can be adapted for multiple tasks.
Answer:
Explanation:
Modern technology such as chemical fertilisers, pesticides, herbicides, modern agricultural machinery, artificial selection... have been used to increase food production. Development and use of chemical fertilisers on farm land à boots levels of nutrients in the soil, increasing crop yields.