how did the discovery of eris force astronomers to reconsider the definition of planet?
Answer:
Explanation:
They had demoted Pluto on the basis of the discovery of Eris. They also discovered that Eris had a moon. It was thought to be much bigger than Pluto. That turned out not to be true. So having accepted Eris as a planet, they had to consider carefully what to do about Pluto. It has a gravitational constant of 0.82 m/s^2 which is 8.4% of that of our gravitational pull. and slightly more than Pluto.
Later data showed that these two objects in space were more like twins and that's what shook up the definition of a planet. You can't demote one and not the other.
A truck of mass 10000kg moving through a sloppy road of length 20km with the help of 5000N force. If the truck climbs the vertical height of 200m and it's efficiency is 80% calculate the additional mass that can be carried by the truck ?
Answer:
30000
Explanation:
Statement of the given problem,
A truck of mass 10000 kg is moving through a sloppy road of length 20 km with the help of 5000 N force. If the truck climb the vertical height of 200 m and its efficiency is 80% calculate the additional mass that can be carried by the truck?
Let M denotes the additional mass (in kg) that can be carried by the truck.
From above data we determine that,
P.E. gained by total mass at the vertical height of 200 m = 80% of work done by the applied force [road elevation = tan^-1 (200/20000) = 0.57° (assumed negligible)]
Hence we get following relation,
(10000 + M)*g*200 = 5000*20*1000*80/100 [g = gravitational acceleration]
or 10000 + M = 50000*8/g = 50000*8/10 [g = 10 m/s^2 (assumed)]
or M = 40000 - 10000 = 30000 (kg) [Ans]
if a person with the arm dimensions shown pushes down hard with a 90 n force, what force must the triceps muscle provide? ignore the mass of the arm and hand in your calculation.
Answer:
1125 N
Explanation:
Una vasca da bagno contiene 1,2 metri cubi di acqua a 35 gradi .Quanti kilogrammi di acqua contiene?
Answer:
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An object has a gravitational force of 111N acting on it. If it had 4 times more mass, what would the force on it be?
Answer:
What is the gravity equation? — It is equal to 6.674×10-11 N·m²/kg². Did you notice that this equation is similar to the formula in Coulomb's law?
Explanation:
Which statement best describes the main idea of the poem
Two roads diverged in a yellow wood, And sorry I could not travel both And be one traveler, long I stood And looked down one as far as I could To where it bent in the undergrowth; Then took the other, as just as fair, And having perhaps the better claim, Because it was grassy and wanted wear; Though as for that the passing there Had worn them really about the same, And both that morning equally lay In leaves no step had trodden black. Oh, I kept the first for another day! Yet knowing how way leads on to way, I doubted if I should ever come back. I shall be telling this with a sigh Somewhere ages and ages hence: Two roads diverged in a wood, and I— I took the one less traveled by, And that has made all the difference.
A. The speaker informs the reader about two roads.
B. The speaker expresses his feelings about nature.
C. The speaker describes his unfulfilled dreams and wishes.
D The speaker explains a difficult decision he had to make.
Explanation:
option D ) is correct the speaker explain a difficult decision he had to make
hi everyone comment
A car moving along a straight highway with speed of 126 km 1 h− to brought to stop within a distance of 200 m. how long does it take for the car to stop?
Answer: 11.43 sec
solution:
v2 – u2 = 2as
a = (v2 – u2)/2s
= (0 – 352)/(2 × 200)
= –1225/400
= –3.06 m/s2
v = u + at
0 = 35 – 3.06 × t
t = 35/3.06
= 11.43 sec
What is the velocity at 10 seconds? PLEASE HELP!!!!!
Answer:
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Two motorcycles travel along a straight road heading due north. At t = 0 motorcycle 1 is at x = 50 m and moves with a constant speed of 6.50 m/s; motorcycle 2 starts from rest at x = 0 and moves with constant acceleration. Motorcycle 2 passes motorcycle 1 at the time t = 10.08.
Part B What is the position of the two motorcycles when motorcycle 2 passes motorcycle 1? Express your answer to three significant figures and include the appropriate units.
Part C What is the acceleration of motorcycle 2? Express your answer to three significant figures and include the appropriate units.
Answer:
Vf = 23 m/s
Explanation:
First we need to find the distance covered by the motorcycle 2 when it passes motorcycle 1. Using the uniform speed equation for motorcycle 1:
s₁ = v₁t₁
where,
s₁ = distance covered by motorcycle 1 = ?
v₁ = speed of motorcycle 1 = 6.5 m/s
t₁ = time = 10 s
Therefore,
s₁ = (6.5 m/s)(10 s)
s₁ = 65 m
Now, for the distance covered by motorcycle 2 at the meeting point. Since, the motorcycle started 50 m ahead of motorcycle 2. Therefore,
s₂ = s₁ + 50 m
s₂ = 65 m + 50 m
s₂ = 115 m
Now, using second equation of motion for motorcycle 2:
s₂ = Vi t + (1/2)at²
where,
Vi = initial velocity of motorcycle 2 = 0 m/s
Therefore,
115 m = (0 m/s)(10 s) + (1/2)(a)(10 s)²
a = 230 m/100 s²
a = 2.3 m/s²
Now, using 1st equation of motion:
Vf = Vi + at
Vf = 0 m/s + (2.3 m/s²)(10 s)
Vf = 23 m/s
Why are earthquakes and volcanic eruptions common in a convergent plate boundary?
Answer:
Much magma is generated at a converging plate boundary where subduction is occurring.
can you predict a dark room is empty or not with the help of sound? how?
please help me ।
50 points
Answer:
Sound waves can reflect off surfaces. We hear sound reflections as echoes. Hard, smooth surfaces are particularly good at reflecting sound. This is why empty rooms produce lots of echoes.
Soft, rough surfaces are good at absorbing sound. This is why rooms with carpets and curtains do not usually produce lots of echoes.
Explanation:
With this information, you'd be able to come up with your answer,
Hope this helps!
yea, by sound enegy example if uh speak a your sound knock on the object and react to your ears
Jeremy ran a race at a speed of 15 m/s in a time of 8 seconds. Calculate the distance he ran.
Answer:
120 m/s if m/s means miles per second than
Explanation:
15 × 8
Answer:
d = 120 m
Explanation:
Data:
Speed (s) = 15 m/sTime (t) = 8 sDistance (d) = ?Use the formula:
d = s * tReplace with the data, and solve:
d = 15 m/s * 8 sd = 120 mThe distance is 120 meters.
Greetings.
a large bottle contains a number of medicinal tablets each having a mass of 250mg the mass of all the tablets is 0.5kg calculate the number of tablets in the bottle
Considering the change of units and rule of three, the number of tablets in the bottle is 2,000.
First of all, you know that each medicinal tablet has a mass of 250 mg, while the mass of all tablets is 0.5 kg. You can see that the measurements are in different units of measurement, so you must make a change of units so that they are in the same units.
So, knowing that 1 kg is equal to 1,000,000 mg, you can apply the following rule of three: if 1 kg is equal to 1,000,000 mg, 0.5 kg is equal to how many mg?
1 kg ⇒ 1,000,000 mg
0.5 kg ⇒ x mg
So: [tex]x=\frac{0.5 kgx1,000,000 mg}{1 kg}[/tex]
x= 500,000 mg
Then, you know that each medicinal tablet has a mass of 250 mg, while the mass of all tablets is 500,000 mg. Now that the values are in the same units, to calculate the number of medicinal tablets you must apply the following rule of three: if 1 tablet has a mass of 250 mg, how many tablets have a mass of 500,000 mg?
[tex]number of medicinal tablets=\frac{500,000 mgx1 tablet}{250 mg}[/tex]
number of medicinal tablets= 2,000
Finally, the number of tablets in the bottle is 2,000.
Learn more:
brainly.com/question/12482948?referrer=searchResultshttps://brainly.com/question/24534599https://brainly.com/question/18328859?referrer=searchResultsWhich statement is true about vectors?
Answer:
Vectors are defined as quantities which are fully described by both their magnitude and direction. By definition, a vector has a direction associated with it.
Explanation:
is this what you want?
How long would it take a message sent as radio waves from earth to reach mars?
Answer:
[tex]longest \: dstance \: btw \: earh - mars \\ (150 + 230) \times {10}^{6} km \\ t = \frac{d}{c} \\where \: c \: is \: the \: speed \: of \: light \\ = \frac{380 \times {10}^{6} km}{3 \times { {10}^{5} }km. {sec}^{ - 1} } \\ \\ when \: mars \: is \: close \: to \: earth \\ ( 230 - 150) \times {10}^{6} km \\ t = \frac{d}{c} \\where \: c \: is \: the \: speed \: of \: light \\ = \frac{80 \times {10}^{6} km}{3 \times { {10}^{5} }km. {sec}^{ - 1} } [/tex]
To make a solution for an experiment, Gunther needs to add 40 g of a solute to 100 g of water. When making the solution at room temperature, he could only add 34 grams before the solute settled out.
What could he do to dissolve the remaining 6 grams of the solute?
a) Put the solution in an ice bath, dissolve the solute, and let the solution return to room temperature.
b) Heat the solution, dissolve the solute, and let the solution cool verifying nothing settled out.
c) Add more water, boil the solution, and dissolve the solute until the some of the water evaporates.
d) Keep the solution at room temperature, add more water, and dissolve the excess solute.
Answer:
b.
Explanation:
b) Heat the solution, dissolve the solute, and let the solution cool verifying nothing settled out.
A subatomic particle that has a positive charge and that is located in the nucleus of an atom
Proton
Neutron
Electron
Nucleus
Answer:
c
Explanation:
Answer:
protons have a positive charge
Explanation:
neutrons have no charge
electrons have negative charge
consider the collision between a car and a light truck whose weights are equal (M = m). If they are moving at the same speed when they collide, compare the size (or magnitude) of the forces between the car and the truck. Friction is so small that it can be ignored
The truck applies the same force to the car that the car applies to the truck. The truck applies the same force to the car that the car applies to the truck. According to Newton's third law, action and reaction have the same magnitude and move in the opposite direction.
What is force?Force is an external agent that can change the state of rest or motion of a body. It has a magnitude as well as a direction.
The direction of the force is the point where force is applied, and the application of force is the point where force is applied.
The concept of force is commonly explained in terms of Isaac Newton's three laws of motion, which are laid out in his Principia Mathematica.
The truck exerts the very same force on the car as the car exerts on the truck. The truck exerts this very same force on the car as the car exerts on the truck.
Action and reaction have the same amplitude and move in the opposite direction, according to Newton's third law.
Thus, this can be the comparison in the given scenario.
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Your question seems incomplete, the complete question is:
Consider the collision between a car and a
light truck whose weights are equal (M = m). If they are moving at the same speed when they collide, compare the size (or magnitude) of the forces between the car and the truck. Friction is so small that it can be ignored.
Compare the forces if the light truck is standing
still when the car hits it.
How do interest groups and PACs keep us from
our democratic principles? How do they defeat democracy? Look at picture for the question please
Answer:
Interest groups help democracy because they represent the interests of such large numbers of people and encourage political participation by many groups. The stable, cooperative relationship often develops among a congressional committee, an administrative agency, and one or more supportive interest groups.
Interest groups try to influence the government to adopt legislation that would benefit them. Email, letter, faxes, phone calls, providing research and information (to bring about change by proving your cause with facts by funded research).
Scientists can determine a fossil's actual age by using which of the following methods?
hypothesizing
relative dating
radiometric dating
estimation
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I need some help with this performance task,, physics isn’t my strongest subject so help is much appreciated :)
(8/9 parts)
Answer:
8/9 parts
Explanation:
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A plant dying after being exposed to poison represents a physical change.
True or false. (No links please.) Correct answers only..
Answer:
False is the correct answer.
It is considered more of a chemical change because all of the cells inside the plant decompose (change chemicaly)
Answer:
False
Explanation:
saw this on another brainly question, it's because a flower that becomes a poisonous flower would be a chemical change. If it were to mix with the poison it would just become something new entirely.
A ball accelerates uniformly at +4.0 m/s2
If the ball was initially moving a +0.20 m/s and the average velocity was +4.2 m/s, then how long will it take it to reach the final velocity?
It will take 1 second to reach the final velocity
Acceleration of a body is the change in velocity of the body with respect to time. This is mathematically represented as;
[tex]a=\frac{v-u}{t}[/tex]
Given the following parameters
a = +4.0 m/s²
u = +0.20m/s
v = +4.2m/s
Substitute the given parameters into the formula to get the time "t"
[tex]4=\frac{4.2-0.2}{t}\\4t=4.2-0.2\\4t=4.0\\t=\frac{4}{4}\\t=1sec[/tex]
This shows that it will take 1 second to reach the final velocity
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In induction, what charge does a neutral substance gain compared to the object brought near it?
Explanation:
In induction, what charge does a neutral substance gain compared to the object brought near it?
The neutral object gains the same type of charge as the object that touched it because the electrons move from one object to the other (Figure 10.16). Induction is the movement of electrons within a substance caused by a nearby charged object, without direct contact between the substance and the object.
The charge gained by the neutral substance, gained compared to the object brought near it, had the same kind of charge that was present when it touched it.
What is induction?The alteration of the distribution of electric charge on a substance is caused by the effect of induction. A negatively charged object brought close to an electrically neutral object causes a positive charge on the near side and a negative charge on the far side of the neutral object as a result of the electric force between charged particles that make up materials.
This very little polarization, or separation of charge, lessens the electric field inside the dielectric.
Because the electrons go from one thing into the next, the neutral object acquires the same kind of charge that was present when it touched it. Lacking physical touch, induction is the movement of electrons within a substance as a result of a nearby charged item.
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According to this graph, the acceleration
is approximately:
Velocity (m/s)
MN
0
1 2 3 4
Time t(s)
5
A. 4 m/s2
B. 2 m/s2
C. 1 m/s2
D. 3 m/s2
Answer:
1 m/s^2
Explanation:
a=(v-u)/t
where,
a=acceleration
v=final velocity
u=initial velocity
(4.5-0)/4.5
1 m/s^2
A 1,336 kg car drives around a flat 199-m-diameter circular track at 22 m/s. What is the
magnitude of the net force on the car?
Hi there!
This is an example of Uniform Circular Motion, thus:
Net Force = Centripetal force
∑F = mv²/r
Plug in the given values. Remember to convert from diameter to radius, first.
d = 199m
r = d/2 = 199/2 = 99.5 m
∑F = 1336(22²)/99.5 = 6498.73 N
how can iron filings be used to map the magnetic field of a bar magnet?
Can someone help me with these 3 questions!!!
Answer:
Below
Explanation:
To find the height of a ball thrown upwards we can use this formula :
vf^2 = vi^2 + 2ad
0^2 = 22^2 + 2(-9.8)d
484 = 19.6d
24.69 = d
25 m = d
To find the time of the phone dropped we can use this formula :
t = √2d/g
t = √2(15) / 9.8
t = √30/9.8
t =√3.142857
t = 1.749
t = 1.7 seconds
For a) since this object is free falling we know that it will accelerate towards earth at a rate of 9.8 m/s^2. The slope of a velocity time graph gives us the acceleration of the object. So in this case the slope would be 9.8 m.s^2
Hope this helps!
at a certain distance from a point charge the electric potential is 200V and electric field is 200V/m, what is this distance
a. 10m
b. 8m
c. 0.1m
d. 0.8m
Explanation:
0.1 m
i dont know how to explain but i know the ans so ............byee ...
PLEASE HELP I WILL MARK YOU
Scenario: On October 15, 1997, a car called
Thrust SSC set a new land-speed record. It
traveled 763 mph in 1 mile and became the first
car to officially break the sound barrier. The
Thrust SSC propels itself forward with two jet
engines made by Rolls-Royce, the same
engines found in the British version of the F-4
Phantom I fighter jet. The propulsion system
on the Thrust SSC is unique in that it does not
rely on the friction between the tires and the
ground for its forward motion. Instead, the jet
engines provide the force.
Question : Is it possible to make the Thrust SSC achieve an even higher maximum speed?
Directions: Use the information above and your
knowledge of Newton's second law of motion
to write a scientific explanation with at least
two modifications that you could make to the
car that would increase its acceleration. Be
sure to state a claim, provide mathematical
evidence (i.e. an equation or scientific
principle), and state your reasoning.
Thrust SC Specifications
Mass
10,700 kg
Maximum Speed
763 mph
Acceleration
20.8 m/s2
Fuel Burn Rate
4.8 gallons/s
Thrust Force
223,000 N
We want to see if the Trust SSC can archive a higher maximum speed.
Remember the second Newton's law:
Force = mass*acceleration.
And acceleration is the rate of change of the velocity.
Assuming the mass of the Trust SSC does not change, increasing the force would mean that we increase the acceleration, and thus, larger velocities can be reached.
Now there are some problems.
How we do increase the force?.
It is hard to ve precise, mostly because we don't really know how the system works, we just got some given random data that we can't use without context.
Another thing we need to remember, this velocity is measured in only one mile. So because we have a fixed distance to measure it, we only can get larger velocities by increasing the acceleration.
And to increase the acceleration we can increase the force, as discussed, or, decrease the mass.
How to decrease the mass? Using lighter materials.
Now let's see an example on how decreasing the mass would affect the acceleration.
Mass = 10,700kgAcceleration = 20.8 m/s^2Then an aproximate force is given by:
F = 10,700kg*20.8 m/s^2 = 222,560 N
Now, if we decrease the mass a little bit, for example to 10,000kg, and we do not change the force, the new acceleration will be given by:
10,000kg*a = 222,560 N
a = (222,560 N)/(10,000kg) = 22.3 m/s^2
So decreasing the mass a little, increases the acceleration, which would make a larger maximum velocity.
Concluding, there are two ways of increasing the maximum velocity:
Increasing the force.
Decreasing the mass of the car.
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