Yuri built a model of the Solar System on his desk. But, it is not exactly the same as the real Solar System. What limits his model from being exactly the same? A. The Sun is a big star, and he cannot make a model of a star. B. It would be hard to make a model that shows the real sizes and distances between planets. C. Yuri is not able to use a model to show all eight of the planets. D. He would not be able to make a model that shows the colors of the planets.
Answers
Answer:
It would be hard to make a model that shows the real sizes and distances between planets ( B )
Explanation:
Yuri building a model of the solar system will face the difficult of replicating the correct distances between the planets and the real sizes of the planets, because in model building the key factors of the Model must be represented properly.
The size of the planets and the distance between the planets are key factors when trying to model the solar system. but the distance between the planets depends on the position of the planets on their orbits which means the distances are not constant ( fixed ) hence that would be the limitation of his model.
Related Questions
A hydrogen bond is a special form of a(n)
a. covalent bond.
b. dipole-dipole force.
C. ionic bond.
d. London dispersion force.
Answers
Answer:
B
Explanation:
Match each type of consequence with its resulting behavior change
Answers
Answer:
Janet stops parking in handicapped spaces after she gets a big parking ticket. - Positive Punishment
Peter’s recess is taken away to discourage him from getting into fights with the other children. - Negative Punishment
Ted increases paying his bills on time to avoid a late fee. - Negative Reinforcement
Sally increases the amount of work she completes to receive more pay. - Positive Reinforcement
Explanation:
In operant conditioning, the main principle is that behavior increases or decreases its frequency depending on whether it's reinforced or punished. A behavior can be reinforced by giving something the subject appreciates, like more pay for their work (positive reinforcement) or taking away something they dislike, like late fees (negative reinforcement). Punishments work the same way, you can give something the subject dislikes, like a parking ticket, (positive punishment) or taking away something they like recess for a child. (negative punishment).
the degree of exactness of a measurement is called
Answers
Answer:
The degree of exactness of a measurement is called precision.
:)
please help me out on this...
Only dogs
Only reptiles
Both cats and dogs
Both amphibians and reptiles
Answers
archer shoots his arrow towards a target at a distance of 90 m, and hits ‘bullseye’ . Calculate the acceleration and time taken by the arrow to hit the target with a velocity of 90.0 m/s
Answers
Answer:
a =45 m/s2
t = 2 seconds
Explanation:
Hi, to answer this question we have to apply the next formula:
v^2 = u^2 +2 a d
Where:
v = final velocity = 90 m/s
u = initial velocity = 0 m/s (shots from rest)
a = acceleration (m/s2)
d = distance = 90m
90^2 = 0^2 + 2a(90)
Solving for a:
8,100= 180 a
8,100/180 = a
a = 45 m/s^2
For time:
v = u + at
90 = 0 + 45t
90/45=t
t =2 seconds
A 7.0\, \text {kg}7.0kg7, point, 0, start text, k, g, end text box is at rest on a table. The static friction coefficient \mu_sμ s mu, start subscript, s, end subscript between the box and table is 0.400.400, point, 40, and the kinetic friction coefficient \mu_kμ k mu, start subscript, k, end subscript is 0.100.100, point, 10. Then, a 30\,\text N30N30, start text, N, end text horizontal force is applied to the box. What is the best estimate of the magnitude of the box’s acceleration?
Answers
The magnitude of the force applied on the box is 25N,if static friction applied on the box is 0.5.
At the point when a force is applied to an object, for it to move it needs to beat the frictional power. The frictional power is opposite to the surface on which it acts. For an item very still, it is followed up on by static friction, this grinding should be conquered before the object can move, while a moving article is opposed by dynamic contact that keeps it from moving.
Since the crate is very still, it is followed up on by a static friction.
mass = 5 kg, acceleration due to gravity = 10 m/s², static friction coefficient = 0.5
Now, we need to find the weight of box.
Weight of box is equal to = mg or mass × acceleration due to gravity
We know that acceleration due to gravity=10m/s².
The applied horizontal Force(F) is =F=μ×weight
So, Force=0.5×50
=>Force=25N.
Hence,magnitude of Force is 25N.
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(Complete question) is:
A 5.0kg, point, 0, start text, k, g, end text box is at rest on a table. The static friction coefficient \mu_sμ smu, start subscript, s, end subscript between the box and table is 0.500.500, point, 50, and the kinetic friction coefficient \mu_kμ kmu, start subscript, k, end subscript is 0.300.300, point, 30. Then, a 20\,\text N20N20, start text, N, end text horizontal force is applied to the box.What is the best estimate of the magnitude of the box’s force?
i points A spring is hanging down from the ceiling, and an object of mass m is attached to the free end. The object is pulled down, thereby stretching the spring, and then released. The object oscillates up and down, and the time T required for one complete up-and-down oscillation is given by the equation T -2were is known as the spring constant. What must be the dimension of k for this equation to be dimensionally correct? When showing your work to turn in, make sure to show that you found the unit of k using dimensional analysis rather than by looking it up. Show (in the work you turn in) that this is equivalent to the units of N/m. This answer has not been graded yet. 2 2- 2 づ丁2- .C
Answers
Question 1
T=2*pi*sqrt(m/k)
dimension of T=sec
dimension of 2*pi=nil(dimensionless)
dimension of m=kg
equation dimension
sec=sqrt(kg/k)
sec^2=kg/k
k=kg/sec^2
so dimension of k will be
MT^(-2)
dimension of N/m=kgms^(-2)/m=kgs^(-2) so it is same
Question 2
F=Gm1*m2/r^2
Dimension of F=MLT^(-2)
MLT^(-2)=G*M*M/L^2
G=ML^3T^(-2)/M^2=M^(-1)L^(3)T^(-2)
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When a driver brakes an automobile, friction between the brake disks and the brake pads converts part of the car's translational kinetic energy to internal energy. If a 1600 kg automobile traveling at 42.8 m/s comes to a halt after its brakes are applied, how much can the temperature rise in each of the four 3.5 kg steel brake disks? Assume the disks are made of iron (cp = 448 J/kg·°C) and that all of the kinetic energy is distributed in equal parts to the internal energy of the brakes.
Answers
The temperature can rise 234° C in each of the four 3.5 kg steel brake disks.
What is law of conservation of energy?Energy cannot be created or destroyed, according to the law of conservation of energy. However, it is capable of change from one form to another. An isolated system's total energy is constant regardless of the types of energy present.
According to law of conservation of energy:
1/2 × 1600 × 42.8² = 4 × 3.5 × 448 × Δt
Δt = (1600 × 42.8² )/( 2 × 4 × 3.5 × 448)
Δt = 234° C.
Hence, the temperature can rise 234° C in each of the steel brake disks.
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The oxygen side of a water molecule is
Answers
the amount of gravitational force that acts on a space vehicle while in earth orbit is
Answers
The amount of gravitational force that acts on a space vehicle while in earth orbit is almost zero but not absolute zero.
There is no ground force or opposing natural force to gravity.
Because the earth is not a perfect sphere, the value of "g" is lowest at the equator. At the equator, its radius is at its largest. Thus, the equator is the location where g will be smallest according to the equation
g = GM/R2.
All items in the planet's gravitational field will be lost in space if gravity abruptly vanishes. We would experience levity. Essentially, if gravity is equal to zero, then there will be no acceleration caused by gravity.
Astronauts can float within their spaceship or outside during a spacewalk in microgravity. Moving heavy stuff is simple. Astronauts, for instance, can merely use their fingertips to manipulate machinery weighing hundreds of pounds.
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An ideal gas undergoes isothermal compression, which reduces its volume by 1800 m3. The final pressure and volume of the gas are 1477.5 torr bar and 2140 cm3, respectively. Calculate the original pressure of the gas in (a) torr, (b) Pa.
Answers
The original pressure of the gas is approximately 1.758 torr.
To calculate the original pressure, we use Boyle's Law equation, which states that the product of initial pressure and volume is equal to the product of final pressure and volume for an isothermal process. By rearranging the equation and substituting the given values, we can solve for the original pressure. The result is approximately 1.758 torr.
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When jumping, a flea accelerates at an astounding 1500 m/s2 , but over only the very short distance of 0.44 mm . if a flea jumps straight up, and if air resistance is neglected (a rather poor approximation in this situation), how high does the flea go?
Answers
When the flea jumps straight up, and if air resistance is neglected, the height of the flea will be 0.089m.
What is air resistance?Air resistance acts as a force on objects moving through the atmosphere. This force acts in the opposite direction when a body is travelling through the air. Air resistance causes the moving body to experience frictional force. A body's speed decreases as it goes due to air resistance.
It should be noted that the equation of kinematics will be illustrated thus:
V = ✓(2 × 1500 × 0.44mm)
Therefore, h = V² / 2g
= (✓(2 × 1500 × 0.44mm)² / (2 × 9.8)
= 0.089m
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We have that the flea goes as high as
h=0.0889m
How high does the flea go?From the Question, we are told that
Acceleration =1500ms^2
Distance d=0.47mm
Generally, the equation for height is mathematically given as
h=\frac{u^2}{2 g}
Where
u^2=2 * 1500 * 0.44 * 10^{-3}
u=1.32ms
Therefore
h=\frac{1.32^2}{2 * 9.8}
h=0.0889m
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Kinetic friction is the frictional force needed to start an object at rest into
motion.
A. True
B. False
Answers
Answer:
b.false i think
Explanation:
i hope i am correct and helps you
Answer:false
Explanation:
I just did it
For an object with velocity=0, what is the net force on the object?
• Net force will be the force of gravity on the object.
• Not force 0 only if the object has no mass (mass = 0).
• Not enough data is given to solve the problem.
• Net force = 0
Answers
The net force on an object with velocity=0 will depend on the given conditions and forces acting on the object. Based on the options provided:
• Net force will be the force of gravity on the object.
If the only force acting on the object is gravity, then the net force would indeed be the force of gravity on the object. In this case, the net force would not be zero unless the force of gravity on the object is also zero (which would require a unique scenario, such as being at the exact center of the Earth).
• Not force 0 only if the object has no mass (mass = 0).
If the object has no mass, then the net force would be zero since force is proportional to mass. However, this would be an uncommon scenario as most objects have non-zero mass.
• Net force = 0
If there are no forces acting on the object or if the forces acting on the object cancel each other out, then the net force would be zero.
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Switch on your light source and make sure it's shining onto a wall.hold your largest cardboard square between the light source and the wall.wha do you observe?
Answers
Light source will pass through and form a shadow, when I hold the largest cardboard between the light source and the wall. Since, the cardboard is not so thick it will allow rays to pass through it.
Light rays always travel in a straight line. A shadow is formed when the light rays hit an opaque object. Sun is a natural source of light. The rays from the sun fall on objects on earth and forms shadows. Light rays do not interfere with each other if they come cross each other. Light rays travel from the direction of source to the direction of eye. They show property of reflection wherein after colliding a surface they trace their path back.
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A wooden block of 0.60 kg is placed on a rough surface where it is accelerated at the rate of 4 m/s2. If the force applied on the block is 12N,what frictionless force is affecting the motion of block?
Answers
Answer:
Take a look below
Explanation:
Latent heat is the ______required for 1 kg of a substance to change phase
Answers
Latent heat is the energy required for 1 kg of a substance to change phase without altering its temperature.
This process involves breaking or forming intermolecular bonds, causing the substance to transition between solid, liquid, or gaseous states.
Two common types of latent heat are the latent heat of fusion (solid to liquid) and latent heat of vaporization (liquid to gas). The specific amount of energy needed depends on the substance's properties and the phase transition occurring.
By understanding latent heat, we can better comprehend various phenomena, such as the energy absorbed or released during melting, boiling, or other phase changes.
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can it is possible to complete half syllabus of physics class 11 in 8 days?
Answers
Answer:
In the human thoughts, there is possible and impossible. In God's world everything is possible. If you keep thinking this you'll never start to study. Just get up, open the book and start to study like you do. Believe in yourself!
What should you do every time you exercise?
A.
Warm up
B.
Drink plenty of water
C.
Stretch
D.
All of the above
Answers
Answer:
D. All of the above
Explanation:
Because it's the most logical answer.
a lion is running at constant speed toward a gazelle that is standing still, as shown in the top figure above. after several seconds, the gazelle notices the lion and accelerates directly toward him, hoping to pass the lion and force him to reverse direction. as the gazelle accelerates toward and past the lion, the lion changes direction and accelerates in pursuit of the gazelle. the lion and the gazelle eventually each reach constant but different speeds. which of the following sets of graphs shows a reasonable representation of the velocities of the lion and the gazelle as functions of time?
Answers
The graph shown in the first option nicely plots the lion's and gazelle's velocities as a function of time, so option A is the correct answer.
Velocity is the rate of change of displacement over time.
It has SI units as m/s.The total amount of movement of an object per unit time is also called velocity. It depends on both the size and direction of the moving object.Velocity can also be called as speed when distance is taken into consideration instead of displacement.As mentioned in the problem of running at a constant speed towards a gazelle with a standing lion as shown above.
So option A is correct.
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calculate the time taken to raise the temperature of 1.5 kg of water in a kettle from 15°C to 100°C given that specific heat capacity of water is 4200 J/kg/K and the heater is rated 250V , 2kW
Answers
Answer:
270 s or 4.5 min
Explanation:
First find the amount of heat needed:
q = mCΔT
q = (1.5 kg) (4200 J/kg/K) (100 − 15) K
q = 535,500 J
q = 535.5 kJ
Power is energy per time.
P = E / t
2 kW = 535.5 kJ / t
t = 270 s
Is a car full of gas a closed system?
Answers
Answer:
Its An Open System
Explanation:
Answer: Open System
Explanation:
can i have brainly
A round ball is kicked into the air at an angle of 39 degrees above the horizontal. The
initial velocity of the ball is 32 m/s.
A. How long is the ball in the air?
B. What is the horizontal distance traveled by the ball?
C. What is the maximum height reached by the ball?
Answers
Answer:
b
Explanation:
Reading/Writing (Astronaut)
Answer multiple choice questions below.
1.
2.
3.
4.
5. List items in the diagram that help the astronaut move. (At least 2)
Rocket full
Answers
An astronaut is a unique category of scientist who travels to the moon, the earth's atmosphere, and asteroids on a spacecraft. The name "astronaut" is derived from Greek words that mean "space sailor."
What 5 items do astronauts bring into space?Food, drink, air, and rest are necessities for astronauts. On Earth, it is typically easy to meet these needs; nevertheless, it is quite difficult to do so in space. Human life cannot exist in the space environment's gases. Actually, the vast majority of space is a vacuum, with no gases present at all.In order to research things like asteroids, the earth's atmosphere, and the moon, an astronaut is a specific kind of scientist who travels to the moon and beyond in a spacecraft. The Greek words for "space sailor" are whence the word astronaut is derived.Meteoroids, Asteroids, comets, moons, and planets collide with one another, fracturing into pieces and leaving behind debris in space known as meteoroids.An astronaut is a unique category of scientist who travels to the moon, the earth's atmosphere, and asteroids on a spacecraft. The name "astronaut" is derived from Greek words that mean "space sailor."The complete question is,
What Exactly Is an Astronaut?
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Which fact is true during a fission chain reaction?(1 point)The total number of protons will increase over time.The total number of protons will increase over time.The total number of protons will decrease over time.The total number of protons will decrease over time.The number of freely-moving neutrons decreases over time.The number of freely-moving neutrons decreases over time.The number of freely-moving neutrons increases over time.
Answers
Answer:
The number of freely moving neutrons decreases over time.
Explanation:
During a fission reaction, the total number of protons remains the same. In other words, the charge is conserved. It is the neutron number that decreases during a fission reaction.
Therefore, 'The number of freely moving neutrons decreases over time' is the correct answer.
Use the simulation to complete the activity.
Force and Motion Basics (select Acceleration)
In one or two sentences, make a hypothesis about whether or not it is easier to start the box moving than to keep it moving on a rough surface. Then, explain how the simulation can be used to prove the hypothesis.
Answers
It is more difficult to get the object to move or keep moving on a rough surface.
What is friction?The term friction has to do with the opposition to the motion of an object. We know that friction could lead to a reduction in the speed of the object. If the surface is so rough, the motion an object would be difficult due to a greater resistive force that keeps the object from moving.
We can then see that it would be more difficult for the object to begin to move on the rough surface rather, motion could easily start and be sustained on quite a smooth surface as we can see.
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On a rough surface, it is more challenging to move or maintain the motion of the object due to friction between the object and the surface due to contact.
What is force?An object experiences a push or pull as a result of interacting with another object. Each object is subject to a force whenever two objects interact.
According to newton's law, an object tries to maintain its position whether it is at resting or it is in motion. If the body is at rest then it tries to maintain its rest position and if the body is in motion then again it tries to maintain its motion. So, if the box is at rest, it is difficult to move the box in starting because of inertia, but once it is in motion it is easy to keep on going with the flow.
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An object has a mass of 5.20g. The mass of the object in kg is
Answers
Answer:
0.0520kg
Explanation:
divide by 1000
A tap supplies water at 26°c while another supplies at 82°c. If a man wishes to bath with water at 40°c, what is the ratio of the mass of hot water to that of cold water
Answers
Where a tap supplies water at 26°c while another supply at 82°c. If a man wishes to bath with water at 40°c, then the ratio of the mass of hot water to that of cold water is: 1/3.
What is the rationale for the above response?The ratio of the mass of hot water to that of Cold water is determined as follows:
M₁C (82 40) = M₂C (40-26)
Where M₁C is the Mass of Tap 1; and
M₂C is the Mass of Tap 2.
Thus,
M₁C (82 40) = M₂C (40-26)
M₁/M₂ = 14/42
= 1/3
Thus, it is right to state that the ratio of the mass of hot water to that of cold water is: 1/3.
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If a 5.00 kg box slides down a ramp inclined at 60.0° above the horizontal, what is the
acceleration of the box
Answers
Answer:
A 70 kg box is slid along the floor by a 400 n force. The coefficient of friction between the box and the floor is 0. 50 when the box is sliding
a beam of monochromatic light is diffracted by a slit of width 0.630 mm. the diffraction pattern forms on a wall 1.26 m beyond the slit. the width of the central maximum is 2.05 mm. calculate the wavelength of the light. nm
Answers
The Wavelength of light is D=2.06m.
A slit with a width of 0 point 630 mm diffracts a monochromatic light beam. 1 point 26 meters away from the slit, a wall develops a diffraction pattern. The central maximum measures 2 point 05 millimeters in width.
To find the wavelength of the light consider following points-
d=0.450mm=0.450×10⁻³m.
D=2.06m.
Reasoning -
The first dark fringe from the central bright fringe is where there is zero intensity on either side of it. The separation of the two zero intensities on either side of the bright central fringe is 4 points and 50 millimeters.The wavefront on the other side of the opening resembles the wave when light passes through a small opening that is comparable in size to the light's wavelength. And elaborate on light diffraction and the phenomenon known as single slit diffraction, which occurs when light passes through a single slit. When light passes through a single slit whose width (w) is on the order of the light's wavelength, we can observe single slit diffraction. The diffraction pattern on the screen will be L >> w away from the slit. Angle influences the intensity.To know more about single slit diffraction-
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