The centripetal force under the light roller b of the 17.0-kg slender bar ab is 465.4 N
What is the force under light roller?The force under light roller b is calculated by applying Newton's second law of motion.
Newton's second law of motion states that the force applied to an object is directly proportional to the product of mass and acceleration of the object.
Mathematically, this law is written as;
F = ma
where;
m is the mass of the objecta is the accelerationin a circular path, we centripetal acceleration, which is given as;
ac = ω²r
where;
ω is the angular speedr is the radius of the pathThe radius of the circular path in this case corresponds to length ab = 1.8 m
F = m(ω²r)
F = 17 x (3.9² x 1.8)
F = 465.4 N
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The complete question is below;
the crank oa rotates in the vertical plane with a constant clockwise angular velocity woof 3.9 rad/s. for the position where oa is horizontal, calculate the force under the light roller b of the 17.0-kg slender bar ab which is equal to 1.8 m.
Suppose photons are produced in a cathode ray tube (CRT) from electrons which are accelerated across a potential of 205 KV. 50% Part (a) What is the maximum energy, in electron volts, of the photons? 50% Part (b) What is the maximum frequency, in hertz, of these photons? fr Grade S Deductio Potential
The maximum Energy is [tex]20.5 * 10^{3}[/tex] eV and the maximum frequency is [tex]4.96 * 10^{18}[/tex] Hz
Potential Energy(V) = 20.5 kV = [tex]20.5 * 10^{3}[/tex] V
Charge of an electron (q) = [tex]1.6 * 10^{-19}[/tex] C
Now, we know,
E = qV
Putting the values in the equation, we get :
E = [tex]1.6 * 10^{-19} *20.5 * 10^{3}[/tex]
Now, [tex]1 eV = 1.6 * 10^{-19}[/tex] J
So, E = [tex]20.5 * 10^{3}[/tex] eV
Hence, the maximum Energy is [tex]20.5 * 10^{3}[/tex] eV.
Now, E = hf
f = E/h
Planck's Constant = h = [tex]4.136 * 10^{-15}[/tex] eV / Hz
[tex]f = \frac{20.5 * 10^{3} }{4.136 *10^{-15} } = 4.96 * 10^{18}[/tex]
Hence, the maximum frequency is [tex]4.96 * 10^{18}[/tex] Hz
The magnetic influence on moving electric charges, electric currents, and magnetic materials is described by a magnetic field, which is a vector field. A force perpendicular to the charge's own velocity and the magnetic field acts on it when the charge is travelling through a magnetic field.
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on a part-time job, you are asked to bring a cylindrical iron rod of density 7800 kg/m3 , length 92.8 cm and diameter 2.05 cm from a storage room to a machinist. calculate the weight of the rod, w . assume the free-fall acceleration is g
On a part-time job, you are asked to bring a cylindrical iron rod of density 7800 kg/m3 , length 92.8 cm and diameter 2.05 cm from a storage room to a machinist, the weight of rod w is 23.41 N .
How is the weight calculated?Given ,
density (d) = 7800 kg/m³
D = 2.05 cm = 0.0205 m
r = D/2 = 0.0205 / 2 =0.01025 m
h = 92.8 cm = 0.928 m
The weight is calculated by ,
W = m × g
But, to find mass (m)
m = d × V
The volume of the rod, because is cylindrical, is,
V = π × r² × h
∴ V = 3.14 × (0.01025)² × 0.928
∴ V = 3.14 × 1.051 × 10⁻⁴ × 0.928
∴ V = 3.0625 × 10⁻⁴
Now to calculate mass,
m = d × V
∴ m = 7800 × 3.0625 × 10⁻⁴
∴ m = 2.3887 Kg
Now, for calculating weight
W = m × g
∴ W = 2.3887 × 9.8
∴ W = 23.41 N
∴ The weight of the rod W assuming the free-fall acceleration is 23.41 N .
What is weight?The weight of an object is the force exerted on it by gravity. It is define weight as a vector quantity, the force of gravity acting on an object. Some define weight as a scalar quantity that is the magnitude of gravity.Can learn more about weight calculation from https://brainly.com/question/15685221
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Is the power to tax an implied power?.
Power to tax is an implied power.
Implied powers are the kind of political powers granted to the United States government that aren't stated in the constitution. These implied powers are needed for the function of any kind of governing body.
Creating a national bank, regulating commerce, collecting tax, raising an army, establishing post offices are some of the implied powers.
Expressed powers are the kind of powers that are directly granted to the federal government found in the constitution.
Few examples of expressed powers are the power to declare war, regulate foreign and interstate commerce, maintain military, conduct foreign relations, etc.
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The measurement of ________ compares the density of urine to the density of water.
The measurement of specific gravity compares the density of urine to the density of water.
Specific gravity, also known as relative density, is the ratio of a substance's density to that of a standard substance.
Urine specific gravity (USG) is a measurement of the particle concentration in urine as well as the density of urine in comparison to the density of water. Measuring USG is a quick and easy way to determine a patient's hydration status as well as kidney function. The more concentrated the urine, the higher the urine specific gravity.
Your healthcare provider will consider the density of your urine in relation to the density of water. In other words, the specific density of water is 1.000. If your kidneys are working properly, your urine specific gravity should be between 1.002 and 1.030.
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which location on a beam would receive the max lateral deflection when a force is applied to the free end and why?
A cantilever beam's free end exhibits the most slope and deflection, whereas the clamped end exhibits neither slope nor deflection.
The midspan of a simply supported beam under symmetric loading conditions is where the maximum deflection occurs. The beam supports are where you can see the steepest slope. Where the slope is zero, the maximum deflection happens.
From the perspective of structural analysis:-
The deflection shouldn't go over the permitted limit.When analyzing uncertain structures, the deflection curve is extremely helpful.Drawing the deflection curve makes finding reactions and moments simple.To know more about deflection curve -
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what is the radius of the event horizon for a black hole with a mass of 7.0 times the mass of the sun
select the correct statement(s) regarding crosstalk interference on adsl. a. fext is of greater concern over next to service providers b. adsl provides asymmetric data paths, therefore neither next nor fext are of concern to service providers c. service providers must ensure a proper acr ratio to avoid next or fext interference d. since fdd is used on adsl, crosstalk issues are not possible
This is the accurate statement out of all the ones offered because adsl offers asymmetric digital subscriber, hence neither next nor fext are a problem to service providers having same wavelength.
Asymmetric digital subscriber line, or ADSL, is a form of digital subscriber line technology that offers an asymmetric data path while providing a symmetric digital subscriber path for next and next. As a result, neither of these companies will offer ADSL services. ADSL is a digital method that uses PCM to sample analogue signals digitally. Pulse code modulation, or PCM-PCM, is a technique for digitally converting a single analogue signal into a digitally sampled signal.
When packets from A to B take a different path than other packets, this is known as asymmetric routing. In physics, the wavelength is the length over which a periodic wave repeats, or its spatial period. It is the separation between consecutive equivalent points on a wave that are in the same phase. Is called as wavelength.
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A bike chain can support a tension of no more than 9800 N. The pedal connects to a crank 17 cm from the axle, and the gear pulling the chain has a 9.1 cm radius.
When riding at a constant speed, with the crank and pedal horizontal, as in (Figure 1), what is the maximum force that can be applied to the pedal before the chain breaks?
Express your answer with the appropriate units.
There is a good chance that all chains tested at all speeds tested above the international limit of 8000N.
How much pressure may be exerted on the pedal before the chain snaps?F chain is engaged in this project, which Oh, these distances are 9.1 centimeters, and from what I can see, they are 17 centimeters here. Moving forward, we can write about 0.0 in a moment, so we will. Take a second to think about 0.0 so that we can compose the question I'm writing here.As a result, this is the question that we can answer.Further, we can write this as follows: 9.1 by 17. A paddle is equal to 9800 Newton in tow.Thus, after solving this, we see that a paddle equals 5.8845.88 Newton.[tex]F(chain) = (9800 N 9.1 cm)/17 cm\\F(paddle) = F(chain) 9.1 cm = F(paddle) 17 cmF(paddle) = 5245.88 N[/tex]To learn more about Force refer to:
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Is the Earth's core a diamond?.
The earth's core is not a diamond.
Core of the earth is the deepest part inside of the earth which is specifically made up of iron and Nickle.
Unlike the mineral-rich crust and mantle, the core is made almost entirely of metal—specifically, iron and nickel. The shorthand used for the core's iron-nickel alloys is simply the elements' chemical symbols—NiFe. Elements that dissolve in iron can also be found in the core and are called siderophiles.Diamonds are formed deep within the which is the upper mantle of the Earth about 100 miles or so below the surface.Diamond is the stable form of carbon at the stable pressure-temperature conditions of earth's core-mantle boundary. So when the carbon escaping from the liquid outer core enters into the mantle it becomes diamond”.Hence, diamond is formed at the upper mantle of the earth and not at the core.
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what is the mass of a solid iron wrecking ball of radius 18 cm? density of iron is 7800 g/l. answer in kg.
The unknown mass of solid wrecking ball is 545.21
What is mass?
mass is a quantitative measure of inertia , a fundamental property of all matter . mass depends on the number and kind of atoms.
It is a dimensionaless quantity.
Sol-
As per the given question
220 g of water added to 90°c
Mass of water=10°C
Tempreture of the mixture =33°C
Unknown mass-
m1 (n-t)= m2(t-b)
220(90-33)=m2(33-10)
:- (we can also do multiple of cp but as both side of the cp fluid unit are same so it's not needed)
220×57=m2 (23)
m2= 220×57/23
m2 =545.21
Thus the unknown massof water is 545.21 .
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A kangaroo
of mass 90kg
jumps with an initial velocity of
5m/s. Calculate the maximum:
gravitational energy of the
kangaroo when it reaches its
highest point?
The maximum gravitational energy of the kangaroo of mass 90kg jumps with an initial velocity of 5 m /s when it reaches its highest point is 1125 J
v² = u² + 2 a s
At the highest point,
v = 0
u = 5 m / s
a = - 9.8 m / s²
0 = 5² + 2 ( - 9.8 ) s
19.6 s = 25
s = 1.28 m
U = m g h
m = 90 kg
U = 90 * 9.8 * 1.28
U = 1125 J
Therefore, the maximum gravitational energy of the kangaroo when it reaches its highest point is 1125 J
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bradwardine then claims that an arithmetic increase in velocity corresponds with a geometric increase in the original ratio of force to resistance.
The supplied statement states that arithmetic velocity increase coincides with a geometric rise in the initial force to resistance ratio.
What, for example, is velocity?The pace at which something goes in one direction or another is referred to as its velocity. as swiftly as a car traveling north on a highway or the speed of a rocket taking flight. The magnitude of the velocity vector's absolute value will always be equal to the motion's speed since it is a scalar.
Can velocity reverse itself?An object's velocity is the rate at which its location changes over time (displacement). While velocity, which incorporates both speed and direction, may be either favorable or unfavorable, speed can only be good.
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A car tire has a radius of 15 inches. Suppose the car is traveling at 60 miles per hour (1 mile = 5,280 feet). What is the approximate rate of spin, in revolutions per minute, of the tire? round the answer to the nearest whole number. The rate of spin is approximately revolutions per minute.
A car tire has a radius of 15 inches. The rate of spin approximately in revolutions per minute is 672 revolutions per minute.
Given that, radius = 15 inches
Speed of the car = 60 miles per hour = 60*5280 = 316800 feet per hour = 31680*12 inches per hour = 3801600/60 inches per minute = 63360 inches per minute.
Angular velocity ω = ?
We know that, v = r ω
where, v is linear velocity
r is radius
Making ω as subject,
ω = v/r = 63360/15 = 4224 radians per minute
= 4224/ 2π revolutions per minute = 672 revolutions per minute
Thus, the rate of spin is approximately 672 revolutions per minute.
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When the distance between the two bodies of same mass is halved the mutual force of attraction between them becomes?.
When the distance between the two bodies is halved the gravitational force of attraction between them becomes one-fourth.
As indicated by Newton's law of attraction each article or body in the universe draws in every single item towards one another and that power of fascination is straight forwardly relative to the result of their masses and contrarily corresponding to the square of the distance between them.
The power of gravity between two articles will diminish as the distance between them increments. The two most significant elements influencing the gravitational power between two items are their mass and the distance between their focuses. As mass increments, so does the power of gravity, however an increment in distance mirrors a reverse proportionality, which makes that power decline dramatically.
At that point by Newton's All inclusive Law of Attractive energy;
F=GMm/R²
Where R is the distance between the bodies .
So , if R′ = 1/2R
Then, gravitational force,
F = G(Mm/R²)
After doubling the distance,
F′ = G{Mm/(1/2R)²} = G{Mm/(1/4)R²}
F = 1/4F′
Therefore, when the distance between the two bodies of same mass is halved the gravitational force between them becomes one-fourth.
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i always thought nothing could escape from a black hole, yet astronomers are locating black hole candidates by the x rays they emit. how can x rays be
X-rays are a shape of electromagnetic radiation, just like seen light. not like mild, but, x-rays have better power and might bypass through most objects.
X-rays are normally produced in X-ray tubes through accelerating electrons via a capability difference and directing them onto a goal fabric, i.e. tungsten. The incoming electrons launch X-rays as they slowdown in the goal.
X-rays are a type of radiation called electromagnetic waves. X-ray imaging creates pictures of the interior of your frame. The pix show the parts of your frame in exclusive sun shades of black and white. that is due to the fact specific tissues absorb one-of-a-kind quantities of radiation.
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Answer:
B is the answer edge 2023 <3
Explanation:
g say you tie a thick, dense rope to a thin, less dense string. if you send a single wave pulse through the string, will it be transmitted through to the rope/and or reflected back into the string? also, which orientation will any transmitted or reflected pulses have relative to the original pulse?
If you send a single wave pulse through the string, it will be transmitted through to the rope.
Let's consider a thin rope attached to a thick rope, with every rope held at opposite ends via people. And suppose that a pulse is introduced through the person conserving the top of the skinny rope. If that is the case, there will be an incident pulse visiting within the less dense medium toward the boundary with a more dense medium.
A part of the strength carried through the incident pulse is transmitted into the thick rope. The disturbance that keeps shifting to the right is called the transmitted pulse. A part of the energy carried via the incident pulse is reflected and returns toward the left giving up the thin rope. The disturbance that returns to the left after bouncing off the boundary is called the reflected pulse.
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A boat moves through the water with two forces acting on it. One is a 1,725-N forward push by the water on the propeller, and the other is a 1,000-N resistive force due to the water around the bow. (a) What is the acceleration of the 1,100-kg boat? m/s 2(b) If it starts from rest, how far will the boat move in 17.5 s? m(c) What will its velocity be at the end of that time? m/s
A boat travelling through the sea while being affected by two forces resulted in the following calculations: acceleration = 0.2, distance = 10 meters, and final velocity = 2 m/s.
Newton's Second Law of Motion is given by this formula;
acceleration=[tex]\frac{Netforce}{mass}[/tex]
Explain what an acceleration is.Acceleration is the rate of change in both the direction and speed of velocity over time. So when something moves faster or more slowly in a straight line, it is referred to as pushed.
What does "acceleration unit" mean?A metre per secondly per second (m/s2) is used to measure acceleration. Definition. The snewton is the unit of force responsible for producing an accelerating of one m / s2 per second when applied to a mass about one kilogram.
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a 22 g bullet is accelerated in a rifle barrel 64.7 cm long to a speed of 953 m/s. use the work-energy theorem to find the average force exerted on the bullet while it is being accelerated. answer in units of n
A 22 g bullet is accelerated with a force of 1.5 × 10⁴ N. in a rifle barrel 64.7cm long to a speed of 953 m/s.
A 21 g (m) bullet is accelerated from rest (u= 0m/s) to 953 m/s (v). We have to calculate the change in the kinetic energy (∆K) using the following formula
∆K= Kf - Ki
where, Kf = final kinetic energy and Ki = initial kinetic energy
∆K= 1/2 x m x v² - 1/2 x m x u²
∆K= 1/2 x m x v²
∆K= 1/2 x 0.022kg x (953m/s)²
∆K = 9.9 × 10³ J
The bullet is accelerated in a 64.7 cm riffle barrel.
According to the work-energy theorem- the work done is equal to the change in the kinetic energy.
W = F×s
W= F × 0.647 = 9.990 × 10³ J
F = 15440.4 Newton
Hence, F = 1.5 × 10⁴ N.
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how many columns will the relation region have in the relational schema mapped from the eaglerun trucking dispatcher er diagram? group of answer choices 6 5
Usually, the entity will have the attributes as their columns, and the relationships will have the primary keys of entities as their columns.
What are ER diagrams?An Entity Relationship (ER) Diagram is a form of flowchart that shows the relationships between "entities" like people, things, or concepts within a system. ER Diagrams are most frequently used in the disciplines of software engineering, business information systems, education, and research to build or troubleshoot relational databases. They are also known as ERDs or ER Models, and they use a predetermined collection of symbols to represent the interconnectedness of entities, relationships, and their qualities. These symbols include rectangles, diamonds, ovals, and connecting lines. They have verbs for relationships and nouns for entities, mirroring the grammatical framework.The REGION relation will have 2(Two) columns named Region ID, and Region Name. Usually, the entity will have the attributes as their columns, and the relationships will have the primary keys of entities as their columns.To learn more about ER diagrams, refer to
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What is stagflation stagflation occurs when ?.
Stagflation is the simultaneous look in an economic system of gradual increase, excessive unemployment, and growing costs.
As soon notion by economists to be impossible, stagflation has passed off repeatedly within the advanced international since the 1970s. policy answers for gradual growth generally tend to worsen inflation and vice versa.
Stagflation is a scenario of each excessive inflation and high unemployment; happens while output is falling at the same time that prices are rising. The life of labor unions and salary controls in nationalized industries sparked it.
Economists have proven that stagflation changed into conventional amongst seven primary marketplace economies from 1973 to 1982. After inflation quotes started to fall in 1982, economists' awareness shifted from the causes of stagflation to the "determinants of productiveness boom and the results of actual wages at the call for exertions".
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Fig 8-50 shows a plot of potential energy U versus position x of a 0.90 kg particle that can travel only along an x axis. (Nonconservative forces are not involved). Three values are UA = 15.0j, UB = 35.0j, and UC =45.0j. The particle is released at x = 4.5 m with an initial speed of 7.0 m/s, headed in the negative x direction. (a) if the partcle can reach x = 1.0 m, what is its speed there, and if it cannot, what is its turning point? What are the (b) magnitude and (c) direction of the force on the particle as it begins to move to left of x = 4.0m? Suppose instead, of the particle headed in thee positive x direction when it is released at x = 4.5m at speed 7.0m/s. (d) if the particle can reach x = 7.-m, what is its speed there, and if it cannot, what is its turning point? What are the (e) magnitude and (f) direction of the force on the particle as it begins to move to the right of x = 5.0 m?
Turning point is 2.05J,force is 10N,force is positive then it points in the positiveX-direction. total energy is 41.1855J and F DIRECTION IS -VE X DIRECTION
A)
At x = 4.5 m potential energy is U1 = 15 J
Initial kinetic energy isK1 = (1/2)mu2
m = 0.9 kg
u= 7 m/s
then K1 = (1/2)*0.9*(7)2J= 22.05 J
Then the total energy is : T =15+22.05=37.05 J
Let Kinitic energy be K2 Then total energy is :
T = U2 +K2 = 37.05J
35 J+K2 = 37.05J
Then K2 = 2.05 JThis is greater than zero and hence particle reaches the point X=1m
then K2 = (1/2)mv2 = 2.05J
(1/2)*1.1(v)2J =2.05 J
solve for v
b)we know that force F = -dU/dX
= -(35-15)/2-4 = +10 N
c)
As force is +ve then the itd points in the +ve X-direction.
d)
At X = 7m then potential energy is U3 = 45J
X = 7m .at turning point kinetic energy of theball is zero.
then turning point will be between x = 5 mand x = 6 m
total potential energy U4 is15-f(dx)
here dx = x-5
we know that f = -dU/dX
At X = 5 m
dx = 6-5 = 1m
dU = 45-15 = 30 J
THEN f = -30/1 = -30N
Then TOTAL POTENTIAL ENERGY IS U4 = 15+30(x-5
but total potential energy is equal total energy 41.180J
then
15+30(x-5)= 41.1805J
solve for x
e)
force at x = 5 m is f = -30 N
F DIRECTION IS -VE X DIRECTION
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Mass of the Milky Way's Halo. The Large Magellanic Cloud orbits the Milky Way at a distance of roughly 160,000 light-years from the galactic center and a velocity of about 300 km/s. Use these values in the orbital velocity law (Mathematical Insight 19.1) to estimate the Milky Way's mass within 160,000 light-years from the center. (The value you obtain is a fairly rough estimate because the orbit of the Large Magellanic Cloud is not circular.)
The approximate mass of the galaxy within 160,00 light-years of the center is 2.0x10^42 kilograms.
To find the mass within 160,000 light-years of the center of the galaxy, we will use the orbital velocity law:
M(r)= (rv^2)/G
To use this law, we need to convert the radius and the speed of the Large Magellanic Cloud into meters and meters per second. We are told that the orbital radius is 160,000 light-years. Since 1 light-year is 9.46x10^15 meters, this is the same as 1.51x10^21 meters. The speed is given as 300 kilometers per second, which we can easily convert to 3.0x10^5 meters per second. Putting the given values into the orbital velocity law, we learn that the approximate mass of the galaxy within 160,00 light-years of the center is 2.0x10^42 kilograms, or about 1 trillion times the mass of the Sun.Hence, mass of the galaxy within 160,00 light-years of the center is 2.0x10^42 kilograms.
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What is the kinetic energy of an automobile with a mass of 1250kg?.
The kinetic energy of an automobile with a mass of 1250 kg traveling at a speed of 11 m/s will be 75,625 [tex]m/s^{2}[/tex]
Kinetic energy = 1/2 * mass * [tex]velocity^{2}[/tex]
= 1/2 * m * [tex]v^{2}[/tex]
= 1/2 * 1250 * [tex]11^{2}[/tex]
= 75,625 [tex]m/s^{2}[/tex]
The kinetic energy of an automobile with a mass of 1250 kg traveling at a speed of 11 m/s will be 75,625 [tex]m/s^{2}[/tex]
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The kinetic energy of an automobile with a mass of 1250kg moving with the speed of 11 m/s will be 75625 J
Given,
Mass of the automobile, m = 1250 kg
The velocity at which the automobile is moving, v = 11 m/s
Kinetic energy the energy that an object has while it is in motion and is given by;
K.E = [tex]\frac{1}{2}[/tex] m[tex]v^{2}[/tex]
= 1/2×(1250) × 11×11
= 75625 J
Hence, the kinetic energy will be 75625 J.
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at what speed do a bicycle and its rider, with a combined mass of 110 kgkg , have the same momentum as a 1600 kgkg car traveling at 5.8 m/sm/s ?
Answer:
[tex]v_1=84.36\frac{m}{s}[/tex]
Explanation:
Momentum (p) is found by [tex]p=mv[/tex]
[tex]p_1=m_1v_1\\p_2=m_2v_2[/tex]
So, the momentum of the objects will be the same when [tex]m_1v_1=m_2v_2[/tex].
So, the speed at which the momentums are equal is represented by [tex]v_1=\frac{m_1v_1}{m_2}[/tex].
[tex]m_1=110kg\\m_2=1600kg\\v_2=5.8\frac{m}{s}\\v_1=\frac{(1600kg)(5.8\frac{m}{s})}{110kg}\\v_1=84.36\frac{m}{s}[/tex]
if a senator voted against a gun-control bill that he agreed with but that his constituency did not support, he exemplifies a trustee style of representation.
If a senator voted against a gun-control bill that he agreed with but that his constituency did not support, he exemplifies a trustee style of representation.
Delegates is to see themselves as perfect agents of others, they have been elected to do the bidding of those who sent them to the legislature.
Trustee, a member of congress who represents constituents interest while also taking into account national, collective, and moral concerns that sometimes cause the member to vote against the preference of a majority of constituents, being responsible.
The Senate is smaller and allows for more debate, and they also have the ability to filibuster, which can kill legislation. In the House, committees are more responsible for the bills and there is less debate.
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billy is riding the train north from miami to fort lauderdale. he puts his book down on the floor as the train is coming into the station. the train slows rapidly to a stop. according to newton's first law of motion, what happens to the book? (1 point) nothing happens. the book slides backward rapidly. the book slides forward. the book slides backward slowly.
The book would be found to slide forward.
What happens to the book?We know that from the Newton first law, it is clear that a body that is in a state of rest or uniform motion would continue in that state unless it is acted upon by an external force.
In this case, we can see that the book was dropped on the floor of the train and the train is now seen to slow down rapidly until it gradually comes to a stop.
From the Newton first law, the book would have to move forward as it suddenly acted upon by a huge force.
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What should be added to the topmost circular contour lines and why?
Curves with equal elevation points should be added to the topmost circular contour lines because they show the form of the land surface on the map.
What are contour lines?Contour lines are described as lines drawn on a map with equal elevation points, so elevation would be constant if you followed the contour line physically.
The characteristics of contour lines include:
Along plane surfaces, contour lines are straight and parallel. Contour lines are perpendicular to lines of steepest slopes.For summits or depressions, contour lines most close upon themselves.Learn more about contour lines at: https://brainly.com/question/29467019
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An inflated balloon released from rest moves horizontally. The law that best explains this event is.
The law that is responsible for the fact that the inflated balloon released from rest moves horizontally is the law of action and reaction.
What is the force that is responsible?Let us note that according to the Newton's third law, action and reaction are equal and opposite. In this case, we are told that an inflated balloon released from rest moves horizontally. We know that the direction that the object moves must be in that of the applied force.
In this case, there is a horizontal force that is applied on the balloon and the effect of this force is that the balloon would have to move in the horizontal direction and this is in reaction to the horizontal force that has been applied.
This is therefore in line with the Newton third law that states that action and reaction are equal and opposite.
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a kangaroo carries her 0.57 kg kg baby in her pouch as she bounds across the ground. as she pushes off the ground, she is accelerating upward at 30 m/s2m/s2.
The solution is 22.6 based on the above statement and child's apparent weight is 3 times greater than its actual weight.
How do you mean by accelerating up?to move more quickly: to pick up pace. The automobile accelerated gradually. In recent months, change has happened faster. to move through the grades more quickly than is typical: to pursue an accelerated educational plan.
What is an illustration of accelerating up?For instance, if a car is traveling at a constant speed and turning a corner, it is accelerating since its direction is shifting. The acceleration increases with turning speed. Therefore, when velocity varies, whether in quantity (an increase or reduction in speed), direction, or both, there is an acceleration.
Briefing:
[tex]\sum F_y=ma_y=F_n-mg\\\because F_n=W_{appar}\\\\\therefore ma_y=W_{appar}-mg\\W_{appar}=ma_y+m[/tex]
[tex]\begin{gathered}W_{a p p a r}=m \times\left[a_y+g\right] \\W=0.57 \mathrm{~kg} \times 9.8 \mathrm{~m} / \mathrm{s}^2 \\W_{a p p a r}=54.1 \mathrm{~N}\end{gathered}[/tex]
[tex]W_{\mathrm{appar\ }}=m\times\left[a_y+g\right]\\W=0.57\mathrm{\ }kg\times39.8\mathrm{\ }m/s^2\\W_{\mathrm{appar\ }}=22.6\mathrm{\ }N[/tex]
The baby's actual weight is:
[tex]\begin{matrix}W=mg=0.57\times9.8\\W=5.5\mathrm{\ }N\\\end{matrix}\\\begin{matrix}&W_{\mathrm{appar\ }}=\frac{W_{\mathrm{appar\ }}}{W}\times W=\frac{22.6\mathrm{\ } N}{5.5\mathrm{\ }N}\times W=4.1W\\\\&W_{\mathrm{appar\ }}-W\\\\&4.1W-W=3.1W\\\end{matrix}[/tex]
Thus, her child's apparent weight is 3 times greater than its actual weight.
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To determine an athlete's body fat, she is weighed first in air and then again while she's completely underwater. It is found that she weighs 690 n when weighed in air and 40. 0 n when weighed underwater. What is her average density?.
1.06 g/mL is her average density
Fb = 690 N - 40 N
Fb = 650 N
water displaced = 650 N / 9.8m/s^2
water displaced = 66.3 kg
water density =1 kg/L,
volume = mass/density:
V = 66.3 kg / 1kg/L = 66.3 L
athlete V = 66.3 L
F = mg
m = 690 N/ 9.8m/s^2
m = 70.41 kg
average density = 70.41 kg / 66.3 L L
average density = 1.06 kg/L
= 1.06 g/mL
Density is defined as a material substance's mass per unit volume. Density is described by the equation d = M/V, where d stands for density, M for mass, and V for volume. Grams per cubic centimeter is the unit of measurement for density. For instance, compared to Earth's density of 5.51 grams, water has a density of 1 grams per cubic centimeter. Another way to express density is in kilograms per cubic meter (in meter-kilogram-second or SI units)
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