Answer:
air pressure in the air-tight bag is greater than cabin air pressure
Explanation:
What happens to the amplitude of the resultant wave when two sound waves with equal amplitude constructively interfere? a. it is half than the amplitude of each wave. b. it is twice than the amplitude of each wave. c. it is the mean of the amplitudes of the two waves. d. it is the square of the amplitude of each wave. e. it is zero.
The amplitude of the resultant wave when two sound waves with equal amplitude constructively interfere, will be twice than the amplitude of each wave.
What is a constructive interference?
A constructive interference occurs when two sound waves with equal amplitude moving in the same direction collide which each other, forming a single wave (resultant wave) with a higher amplitude.
Thus, we can conclude that the amplitude of the resultant wave when two sound waves with equal amplitude constructively interfere, will be twice than the amplitude of each wave.
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name any two instruments based on archimede's principle
Two instruments based on Archimedes' principle
LactometershydrometersExplanation:
Archimedes' principle states -
when a body is partially or completely immersed in a fluid , the fluid exerts an upward force on the body which is equal to the weight of the fluid displaced by the body.OR
when a body is immersed fully of partially in a fluid , it experiences an upward force that is equal to the weight of the fluid displaced by it.Applicatios : Lactometer , hydrometer.
define scientific measurement
Answer:
Measurements are a basic necessity in science. Scientists have designed thousands of different tools to help in the vital process of measuring. In this image of the control panel of the space shuttle Atlantis, we see dozens of readouts from measuring systems.
Which change will most likely increase the strength of a magnetic field produced by an electromagnet?
Answer:
Increasing the number of loops of wire around the iron core
Hope this helps!
Can someone please answer this, ill give you brainliest Would be very appreciated.
Answer: Through Photosynthesis
Explanation:
Answer:
Option 3
Explanation:
Carbon is cycled into the hydrosphere through the diffusion from the atmosphere.
Further explaining this :
Some of the carbon dioxide molecules in the rain react with the water droplets to form carbonic acid that falls with the rain. The carbonic acid that falls to the surface of the Earth dissolves rocks by the process of chemical weathering, where it releases calcium, magnesium, potassium or sodium ions. These ions are carried by rivers to the ocean. The carbonic acid that falls directly into surface water bodies reacts with the water to form bicarbonate ions.
How are tardigrades related to astronomy?
A.
They live long enough to survive long space journeys.
B.
They are the only life form that requires no oxygen to survive.
C.
They can survive in extreme, harsh environments, including space.
D.
They are able to propel themselves in zero gravity environments.
Tardigrades related to astronomy as they can survive in extreme, harsh environments, including space for long time without oxygen. The correct option is A , B and C.
What is tardigrades?A special adaptation that allows the tiny animal known as the tardigrade to curl up into a dry, lifeless ball and survive for decades.
Tardigrades can undergo utter vacuum and intense pressures more than five times as in the deepest ocean. Temperatures up to 300F and as low as -458F is maintained.
They survive in space and for long time for about 10 days. They can live without water for decades.
Thus, the correct option is A , B and C.
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A car is travelled at 8m/s. The mass of the car is 750 kg.
Calculate the force required to stop the car in 8s
Answer:
F = 750N
Explanation:
We know that F(force) = mass(m) × acceleration(a)
And that Acceleration(a) = velocity(V) ÷ time(t)
So we'll first calculate the acceleration
a = V = 8m/s = 1m/s²
t 8
Next we'll calculate the force
F = ma = 750kg × 1m/s² = 750N
Which answer correctly describes the grey lines in this Hering illusion? (Optical Illusions Lesson)
A close-up of a fanDescription automatically generated with low confidence
Question 1 options:
The grey lines are bent.
The grey lines are straight.
The grey lines are curly.
The grey lines are a figment of my imagination.
Answer: The grey lines are bent.
Explanation: The grey lines are bent.
The answer that correctly describes the grey lines in this Hering illusion is "The grey lines are bent." Option A. This is further explained below
What is the Hering illusion?The Hering Illusion is one of several illusions in which a major component of a basic line picture is obscured.
In conclusion, The statement for the grey lines in this Hering illusion is "The grey lines are twisted.".
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Does this equation show that transmutation has taken place during decay?
Why or why not?
6128 Ni -> 6128 Ni + y
A. Yes, because the numbers of nucleons and atoms are conserved.
B. No, because there is conservation of the number of atoms as well as the number of nucleons.
C. Yes, because the nickel atoms remain nickel atoms with the same number of neutrons.
D. No, because high-energy electromagnetic waves are emitted.
Explanation:
Transmutation means change in neutron numbers u
Like for example
When Potassium (N=19 ) goes through beta decay it forms (N=20)
Here no change in neutrons (Same 28)
So no trnasmutaions.
Option B
5. A spring balance is used to weigh a fish. The combined mass of the fish and the pan is 1.50
kg. If the spring constant is 1200 N/m. What distance does the spring stretch?
[tex]\\ \rm\Rrightarrow x=\dfrac{2mg}{k}[/tex]
[tex]\\ \rm\Rrightarrow x=\dfrac{2(1.5)(9.8)}{1200}[/tex]
[tex]\\ \rm\Rrightarrow x=\dfrac{3(9.8)}{1200}[/tex]
[tex]\\ \rm\Rrightarrow x=\dfrac{9.8}{400}[/tex]
[tex]\\ \rm\Rrightarrow x=0.0245m[/tex]
2.45cm is distance
Make the following conversion:
A) 60∘C into F
B)70∘C into K
C) 303∘K into C
D) 140∘F into C
If you don't know what I mean by C, F, K and ∘ it meaning is:
C- Celsius
F- Fahrenheit
K- kelvin
∘- degree sign
Answer:
Kelvin to Celsius: C = K - 273 (C = K - 273.15 if you want to
A block and a ball have the same inertia and move with the same initial velocity across a floor and then encounter different ramps. The ramps are identical in every way except for the fact that there is enough friction for the ball to roll without slipping and the block slides without friction up the ramp. Which one makes it furthest up the ramp
The ball rolling without slipping will make it furthest up the ramp because it has greater kinetic energy.
Conservation of energy
The height rolled by each object can be determined by applying the principle of conservation of energy.
The ball rolling without slipping will have additional rotational kinetic energy.
The block won't have additional rotational kinetic energy.
Total K.E ball > Total K.K block
ΔP.E = ΔK.E
Thus, the ball rolling without slipping will make it furthest up the ramp because it has greater kinetic energy.
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Match each space mission with the correct milestone.
1. first animal in space
Apollo 11
2. first person in space
Sputnik 2
3. first person on the moon
Salyut
4. first man-made object in space
Vostok 1
5. first American in space
Sputnik 1
6. first space station
Freedom 7
Matching each space mission with the correct milestone
First animal in space ____________ Sputnik 2first person in space ____________ Vostok 1first person on the moon _________ Apollo 11first man-made object in space ____ Sputnik 1first American in space __________ Freedom 7 first space station ______________ SalyutMeaning of space missionA space mission is a mission that takes an individual, animal, a thing or material out of earth using a spaceship. This mission is always carried out with a desire to find out more about the galaxy earth is a member of and to learn about other planets.
In conclusion, the list above is the accurate Matching of each space mission with the correct milestone.
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Answer:
See attachment below, Hope it helps!
derive a relation between critical angle and refractive index
Answer:
At the critical angle the angle of refraction (outside the medium) is 90°
Ni sin θ = Na sin 90° = 1 assuming outside medium is air
sin θ = 1 / Ni where Ni is the refractive of the medium involved
What is the difference between saturated and unsaturated fat? Why are partially hydrogenated fats useful for making potato chips but not particularly healthy for humans to eat?
Saturated fats have the maximum number of hydrogens possible, while unsaturated fats consists of a double bond between two of the carbon atom.
The partially hydrogenated fats useful for making potato chips but not particularly healthy for humans to eat because of presence of trans fat.
What is partially hydrogenated fats?Partially hydrogenated fats have trans fat that can raises cholesterol level in heart and result in severe health complications like heart attack.
Each carbon have four bonds to react with. In saturated fats, each carbon has four hydrogens bonded and a straight structure is formed They are solid at room temperature. So, they are remain solid in arteries of heart and block it.
Unsaturated fats have a carbon, double bonded with another carbon and gives the molecule a bent structure. They remain liquid at room temperature and are healthier fats.
The potato chips are not healthy for humans to eat. The partially hydrogenated fats raise bad cholesterol and lowers good cholesterol. The trans fats increases the risk of heart disease and can lead to death of adults. The more trans fats eaten, the greater is the risk of heart attack.
Thus, partially hydrogenated fats useful for making potato chips but not particularly healthy for humans to eat because of presence of trans fat.
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The earth takes 375.25 days to orbit around the sun. Is the earth accelerating?
Answer:
Yes
Explanation:
Centripetal acceleration = a = v^2/r
Which form of precipitation is most likely to occur when the temperature in the clouds is below freezing, but the temperature in the air below is above freezing?
Hail
Rain
Sleet
Snow
Answer:
Hail :) hope this helps
Explanation:
Suppose sunlight just outside earth's atmosphere has an intensity of 1.47 kw/m2. calculate (a) em and (b) bm for sunlight there, assuming it to be a plane wave.
Intensity of the sunlight and magnetic field amplitude will be 1.03 ×10³ V/m and 3.43 ×10⁻⁶ T respectively.
What is a magnetic field?It is the type of field where the magnetic force is obtained. With the help of a magnetic field. The magnetic force is obtained, it is the field felt around a moving electric charge.
The intensity of the sunlight is found as;
[tex]\rm I = \frac{E_m^2}{2 \mu_0C} \\\\ E_m= \sqrt{2 \mu_0I_c} \\\\ E_m=\sqrt{(2 \times 4 \pi \times 10^{-7} m/A)(1.40 \times 10^3 \ W/m^2 )(2.988 \times 10^8 m/sec)} \\\\ E_m=1.03 \times 10^3\ V/m[/tex]
The magnetic field amplitude is found as;
[tex]\rm B_m= \frac{E_m}{c} \\\\\ B_m=\frac{1.03 \times 10 \ V/m^}{3 \times 10^8 \ m/sec} \\\\ B_m=3.43 \times 10^{-6} \ T[/tex]
Hence, intensity of the sunlight and magnetic field amplitude will be 1.03 ×10³ V/m and 3.43 ×10⁻⁶ T respectively.
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When a certain constant force acts upon an object with mass 4kg, the acceleration of the object is 13. If the same force acts upon another object whose mass is 26, what is this object's acceleration
If the same force acts upon another object whose mass is 26, the object's acceleration is 2 m/s².
What is Newton's second law of motion?It states that the force F is directly proportional to the acceleration a of the body and its mass.
The law is represented as
F =ma
Given is the mass of object m =4 kg and the acceleration a = 13 m/s², then the force will be
F = 4x13 = 52 N
The same force is acted upon the object of mass 26kg, then new acceleration will be
52N = 26 kg x a'
a' = 2 m/s²
Thus, the object's acceleration is 2 m/s²
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If 100.0 g of carbon-14 decays until only 25.0 g of carbon is left after 11 460 y, what is
the half-life of carbon-14?
Answer:
5730 yr
Explanation:
25 = 100 (1/2)^11460/x where x = half life
.25 = (1/2)^11460/x
log .25 / log.5 = 11460/x
x = 5730 yr
What is the role of pressure and dissolved gases in eruptions?.
Answer:
Explanation:
Magma contains dissolved gases, which provide the driving force that causes most volcanic eruptions. As magma rises towards the surface and pressure decreases, gases are released from the liquid portion of the magma (melt) and continue to travel upward, and are eventually released into the atmosphere.
Light of different wavelengths look different ______ to humans:
A.) visible spectrum
B.) electromagnetic spectrum
C.) colors
D.) absorption
Answer:
C) colors
Explanation:
The wavelengths of light determine the color that we see. Humans cannot see lightwave absorption, but we can see light in the form of colors.
Shorter wavelengths (indicating higher frequencies) look violet,
and Longer wavelengths (indicating lower frequencies) look more red
how does this experiment help us understand their behavior? stanford prison experiment
This experiment help us understand their behavior as well as how the people will cop up with the rules and regulation the society wants to apply on them
What is Stanford prison experiment ?In a two-week simulation of a prison setting, the Stanford prison experiment was meant to look at the impact of situational factors on participants' responses and behaviors.
Hence, this experiment allows us to better understand their behavior, as well as how individuals will respond to the laws and regulations imposed by society.
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Can someone please answer this, ill give you brainliest Would be very appreciated.
Answer:
O ice
Explanation:
Albedo refers to the proportion of the incident light that is reflected by a surface to the amount of incoming light.
Here, only ice will reflect even some amount of light. Pavement and dirt do not reflect at all, meanwhile, where glass reflects slightly.
A standing wave is a wave that remains in a constant position.
true or false
Drag force on a body increase with the increase in speed of the body.justify with one example from everyday experience
The drag force is the force that opposes the movement of a body through a fluid.
What is the drag force?The drag force is the force that opposes the movement of a body through a fluid. This occurs in cases such as when a car is moving through air.
Owing to the fact that drag force tends to slow down vehicles when they move at higher speed, vehicles that are meant for racing are streamlined to reduce the drag force.
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a table tennis ball launcher fires a tennis ball. what do we know about the impulse on both of the objects?
Answer:
As we know by Newton's III law that if an action force is applied on an object then the reaction force of same magnitude in opposite direction will act on the other.
So here when ball is shot using launcher then the force will be same on launcher as well as ball so we can say
now since force is of same magnitude for both both then we will have
so from above we can say that both ball and launcher will have same impulse but opposite in direction.
Now since ball will have less mass so here it will have more speed while launcher is heavy in mass so its speed is slow or very small as comapre to ball.
You are using your phone to stream a movie. An hour into the movie, you notice that your phone is getting hot. What form of energy is the heat?
Answer:
Radio frequency energy. (Radiation)
Explanation:
the phone is getting hot due to large amount of used electricity. Geothermal energy is getting passed from the earth through the power lines from light and turns into electricity. this is what happens in a phone as well.
what could you do to increase the final momentum of a golf ball?
Answer:
I would hit it as hard as you can with the club.
Explanation:
well one thing that I like to do is hit the golf ball as hard as possible with the club.
This is because for me, when I do that, I can normally get more momentum which means I also get a farther hit.
A snowboarder starts from rest at the top of a slope. They accelerate to 35 m/s over 9 seconds. What is their acceleration?
GA9.35 mis
OB. 0.25 m/s²
OC. 26 m/s²
OD. 3.88 m/s²
v=35m/s
t=9
a=35/9a=3.88m/s²