Answer:if 1 m = 100 cm then there should be 200 cm in m^2
Explanation:
a helicopter is ascending at a rate of 14m/s at a height of 20m above the ground it drops a package Calculate the time taken by the package to reach the ground
Adding the rise time and fall time then the package to reach the ground in 3.647 second.
Time can be defined in the sence as,that it is a continued sequence of existence and events that occurs in an apparently irreversible succession from the past, through the present, into the future.
We are given that ,
The packege 's trajectory into a rise to maximum height and fall from there to the ground .Rise to maximum height begins at vertical position is given as,
Vertical position of the helicopter = H₀ = 20 m,
Initial velocityof helicopter = u = 14 m/s upward
Covered time of the helicopter =t₁ = 0,
Acceleration under gravity of helicoper=(- a) = -9.81 m/s²
Rise ends when instantaneous velocity v = 0,
Therefore, from the equation of motion for velocity as a function of time is written as ,
v = a + at
0 = 14 m/s - (9.81 )m/s² t₁
t₁ = 1.427sec
Thus , the velocity changes linearly over time t₁ sec from u = 0 m/s then the averaging velocity can be given by w i.e.
w = u /2 = (14m/s)/2
w = 7 m/s
Therefore, maximum height of packege is given as,
H₁ = H₀ + w × t₁
H₁ =20m + 9.81m/s (1.427)s
H₁ = 33. 998 m
Therefore, when the packege fall from maximum height begins at ,
Time= t₁ = 0,
Position= h = H₁
Velocity= u = 0, and
Acceleration due to gravity downward=(-a) = -9.81 m/s²
Thus the equation of motion for position (s) as a function of initial position (h) is can be written as,
s = h + ut₁ + (1/2) at₂²
0 = H₁ + 0 + (1/2) (-9.81)t₂²
t₂² = 4. 890 s
t₂ = 2.21 s
Hence , on adding the rise time t₁ and fall time t₂
Total time T = t₁ + t₂
T = 1.427 s + 2.21s = 3.647 s
Thus, then the package to reach the ground in 3.647 second.
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ANSWER THIS FOR BRAINLIEST CROWN ITS SO EASY!
Answer:
true
Explanation:
Inertia. Sometimes this first law of motion is referred to as the law of inertia. Inertia is the property of a body to remain at rest or to remain in motion with constant velocity.
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A force of 15N is exerted on an area of 0.1 m squared. what is the pressure
Answer:
1The force is with u. Lol no Idea if this is correct sry if u fail. I go must now
someone please help me with this work
Answer:
It would kill her
Explanation:
A doctor is examining a child with a red, inflamed ear
canal. The child is suffering some hearing loss. The ear,
contains a small amount of soft earwax.
Which is most likely the cause of the child's hearing
loss?
O damage to the outer ear
O a disease or infection of the outer ear
O damage to the bones of the middle ear
O a disease or infection of the inner ear
Answer:
C
Explanation:
Water can’t stick to itself. True or false?
Answer:ture
Explanation:
what phenomenon is applied in the drawing of kerosene by the wicks of a kerosene stove.
Capillarity phenomenon is applied in the drawing of kerosene by the wicks of a kerosene stove.
A liquid's ability to flow through small openings without the aid of outside forces is known as capillarity. Cotton or cotton threads make up the majority of the wicks.
The process of a liquid flowing in a small space without the aid of, or even in opposition to, any outside forces like gravity is known as capillary action.
Surface tension causes a liquid in a capillary tube to have the inclination to rise or descend, which is known as capillarity. the uses of capillarity. 1. Even a tall tree uses the capillary rise to give water to the leaves at the top.
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In an electrical circuit, the term current refers to:
a. resistance.
b. potential difference.
c. flowing charges.
d. energy loss.
Answer: c
Explanation:
Current is the flowing charges that goes around p.d increases it.
write an essay for me pls about Proxima Centauri
this will help a lot
Answer:
Proxima Centauri is a small, low-mass star located 4.244 light-years (1.301 pc) away from the Sun in the southern constellation of Centaurus. Its Latin name means the "nearest [star] of Centaurus". This object was discovered in 1915 by Robert Innes and is the nearest-known star to the Sun.
Star system: Alpha Centauri
Category: Star, Flare star
Constellation: Centaurus
Discoverer: Robert T. A. Innes
Explanation:
u should make it into an essay
what's newtons second law
Newton's Second Law of Motion states "The rate of change of momentum of a body is directly proportional to the applied unbalanced force in the direction of force".
Explain how energy from the sun is the primary source of energy on planet Earth, using the principles of the conservation of energy and examples to support your answer.
PLEASE HURRY
6. Different between
air Pressure and liquid pressure??
Answer:
The difference is that water is an incompressible fluid — its density is almost constant as the pressure changes — while air is a compressible fluid — its density changes with pressure. Atmospheric pressure is the pressure exerted on a surface by the weight of the atmosphere (a compressible fluid) above it.
Explanation:
Which statement accurately describes nutritional dietary supplements?
A. Supplements labeled “natural” are safe for all people.
b. Supplements labeled “natural” may interact negatively with medications.
c.Over-the-counter supplements are safe at almost any dose.
d.Over-the-counter supplements are required to have proven health benefits.
Answer:
its b
Explanation:
Supplements labeled “natural” may interact negatively with medications. The correct option is B.
What is nutritional dietary supplement?Dietary supplements are substances that you may use to supplement your diet with nutrients or to reduce your risk of health problems such as osteoporosis or arthritis.
Dietary supplements are available in pill, capsule, powder, gel capsules and tablets, extracts, or liquid form.
Dietary supplements are available in a variety of forms, including tablets, capsules, gummies, powders, drinks, and energy bars.
Vitamins D and B12 are popular supplements, as are minerals like calcium and iron, herbs like echinacea and garlic, and products like glucosamine, probiotics, and fish oils.
Because many supplements contain active ingredients that have strong effects in the body, herbal products can pose unexpected risks. Natural supplements may have negative interactions with medications.
Thus, the correct option is B.
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A variable is defined as a___ that can have ____than one single value.
Answer:
item/object; more
Explanation:
A variable is defined as an object or item that can have more than one single value.
A variable is defined as a quantity that can have more than one single value.
In the context of mathematics and science, a variable is a symbol or quantity that can change or vary. It represents an unknown or changing value that can take on different values in different situations or scenarios. Variables are used to describe relationships, equations, and patterns in various fields such as mathematics, physics, economics, and more.
Variables are an essential concept in scientific research and experimentation. They allow scientists to investigate how changes in one factor can affect another factor. In an experiment, variables are typically categorized into two main types: independent variables and dependent variables. The independent variable is the one that the researcher manipulates or controls to observe its effect on the dependent variable, which is the outcome being measured.
For example, in a study investigating the effects of different amounts of fertilizer on plant growth, the amount of fertilizer would be the independent variable, as it is being controlled by the researcher. The plant growth would be the dependent variable, as it depends on the different amounts of fertilizer applied.
Overall, variables are fundamental components of scientific inquiry, data analysis, and problem-solving, enabling researchers and scientists to understand and describe the relationships and patterns within various phenomena.
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Which is an example of kinetic energy?
a. an archer's bow with the string drawn back
b.river water at the top of a waterfall
c. a Ferris wheel before it starts turning
d.a crumb falling from a table.
Answer:
it's a
Explanation:
Answer:
I believe its D!
Explanation:
Kenetic energy is motion
Please I need help ill give u 50 points
Answer:
trasvere wave
Explanation:
first one
The wind exerts a force of 500N, South on a sailboat, while the water exerts a force of100N East on the sailboat.
Answer:
Net force = 509.90 N
Explanation:
Given that,
Force exerted by wind is 500 N South on a sailboat.
The force exerted by water is 100 N on the sailboat.
Two forces are acting at an angle of 90 degrees. We can find the net force acting on the sailboat. Let it is F.
[tex]F=\sqrt{500^2+100^2} \\\\=509.90\ N[/tex]
So, the net force on the sailboat is 509.90 N.
An electric toaster has a resistance of 12 ohms what current will it draw from a 120v supply
Answer: The Answer is 10 Ampere
Explanation:
The Formula
Resistance= Voltage ÷ current
Current= Resistance÷ current
Resistance= 12 ohms
Potential difference=120volts
hence Current= 10 Ampere
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6. A bored student throws a pebble straight up from a 5m cliff at 12 m/s. How much time
does it take to hit the ground below? Part 2: which letter (A, B or C) most accurately
portrays this scenario?
Answer:
It takes 0.416 seconds to hit the ground.
Explanation:
speed = distance/ time
12 = 5/ x (multiply both with x)
12x = 5 (÷ 12)
x = 0.416 s
4. A 30kg red ball is rolling to the right with a velocity of 4m/s and a green ball is rolling to the right with a velocity of 5m/s left. After the collision the red ball has a velocity of 2m/s left and the green ball is rolling to the left with a velocity of 4.5m/s left. What is the mass of the green ball?
The question is confusing for the initial direction of the green ball. We assume to the left.
Answer:
The mass of the green ball is 360 Kg
Explanation:
Law Of Conservation Of Linear Momentum
The total momentum of a system of bodies is conserved unless an external force is applied to it. The formula for the momentum of a body with mass m and velocity v is
P=mv.
If we have a system of bodies, then the total momentum is the sum of the individual momentums
[tex]P=m_1v_1+m_2v_2+...+m_nv_n[/tex]
If some collision occurs, the velocities change to v' and the final momentum is:
[tex]P'=m_1v'_1+m_2v'_2+...+m_nv'_n[/tex]
In a system of two masses, the law of conservation of linear momentum
is written as:
[tex]m_1v_1+m_2v_2=m_1v'_1+m_2v'_2[/tex]
Let's call m1=30 Kg the mass of the red ball moving to the right at v1=4 m/s, m2 (unknown) the mass of the green ball moving at v2=-5 m/s to the left (assumed).
After the collision, the red ball rolls to the left at v1'=-2 m/s and the green ball is at v2'=-4.5 m/s. Thus:
[tex]30*4+m_2*(-5)=30*(-2)+m_2(-4.5)[/tex]
Operating:
[tex]120-5m_2=-60-4.5m_2[/tex]
[tex]120+60=5m_2-4.5m_2[/tex]
[tex]180=0.5m_2[/tex]
[tex]m_2=180/0.5=360[/tex]
The mass of the green ball is 360 Kg
A projectile has an initial horizontal velocity of 34.0 M/s at the edge of a roof top. Find the horizontal and vertical components of its velocity after 5.5s
I need shown work !
Answer:
[tex]v_x=34 m/s[/tex]
[tex]v_y=53.9\ m/s[/tex]
Explanation:
Horizontal Launch
When an object is thrown horizontally with a speed v from a height h, it describes a curved path ruled by gravity until it eventually hits the ground.
The horizontal component of the velocity is always constant because no acceleration acts in that direction, thus:
vx=v
The vertical component of the velocity changes in time because gravity makes the object fall at increasing speed given by:
[tex]v_y=g.t[/tex]
The horizontal component of the velocity is always the same:
[tex]v_x=34 m/s[/tex]
The vertical component at t=5.5 s is:
[tex]v_y=9.8*5.5=53.9[/tex]
[tex]v_y=53.9\ m/s[/tex]
A 50.5 N object is in free fall.
What is the magnitude of the net force
which acts on the object?
Answer:
-49.49
Explanation:
If there’s no air resistance then the only thing acting on the object is the force of gravity which is mass times gravity. And to get mass all we have to do is divide 50.5/10 then times that by -9.8 since that’s the force of gravity.
Answer: The answer would be 50.5 N.
Explanation: It’s because there’s no air resistance.
What are some other examples of scientific knowledge that must have resulted from indirect evidence?
Answer:
The atomic model, the structure of the solar system, and the theory of black holes are examples of models created using indirect evidence.
Explanation:
I have no explanation sorry.
Indirect evidence is based on inference. The atomic structure, the structure of the solar system, and the theory of black holes are all based on indirect evidence.
In studying the structure of the atom, we do not directly observe the sub-atomic particles rather we draw inferences from several experiments and make conclusions. This is indirect evidence.
The solar system can be studied using several astronomical instruments that aid us in making useful inferences regarding the solar system.
The weight of evidence that substantiate the existence of black holes have also been amassed through indirect evidence.
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Review. For a certain type of steel, stress is always proportional to strain with Young's modulus 20 × 10¹⁰ N/m² . The steel has density 7.86× 10³kg / m³. It will fail by bending permanently if subjected to compressive stress greater than its yield strength бy = 400MPa. A .rod 80.0cm long, made
of this steel, is fired at 12.0 m/s straight at a very hard wall.(d) the strain
The strain in the rod is [tex]2.37\times 10^{-3}[/tex]
Given:
Young's modulus, Y = [tex]20 \times 10^{10}\;N/m^{2}[/tex]
Steel density, [tex]\rho = 7.86 \times 10^{3}\;kg/m^{3}[/tex]
Length of the rod, L = 80 cm = 0.800m
The speed of the wave in the rod is,
[tex]$v = \sqrt{\frac{Y}{\rho}} = \sqrt{\frac{20\times 10^{10}\ \mathrm{N/m^2}}{7.86\times 10^3\ \mathrm{kg/m^3}}} = 5044\ \mathrm{m/s}$[/tex]
Hence the time taken by the wave to travel the end of the rod is,
[tex]$t=\frac{L}{v} = \frac{0.800\ \mathrm{m}}{5044\ \mathrm{m/s}} = 1.58\times 10^{-4}\ \mathrm{s}$[/tex]
The velocity of the rod is, [tex]$v_r = 12.0\ \mathrm{m/s}$[/tex]
The other end will keep moving after the front end hits the wall until the wave reaches the other end, given the period determined by the above problem.
As a result, before the wave reaches the end of the rod, it has traveled a distance of
[tex]$\Delta L = v_r t = (12.0\ \mathrm{m/s}) (1.58\times\ \mathrm{s}) = 1.90\times 10^{-3}\ \mathrm{m} = 1.90\ \mathrm{mm}$[/tex]
The strain in the rod is given by,
[tex]$\frac{\Delta L}{L} = \frac{1.90\times 10^{-3}\ \mathrm{m}}{0.800\ \mathrm{m}} = 2.37\times 10^{-3}[/tex]
Hence, the strain in the rod is [tex]2.37\times 10^{-3}[/tex].
What is strain?In terms of physics, strain is defined as the fractional modification of configuration.
A system's reaction to an applied stress is called a strain, according to 2. A force that loads a material results in a stress that leads to deformation. Formula for a strain
Change in configuration equals strain first arrangement
It is a dimensionless quantity that lacks a unit.
Change in object size / original object size is known as strain.
It is a quantity without units or dimensions.
Strain kind.
Object length change divided by starting object length equals longitudinal strain.
L/L stands for longitudinal strain.
Change in object volume divided by starting object volume equals longitudinal strain
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Which of the following is Ohm's Law?
OR=xR
O1-V/R
OVR/
OV-/R
Answer:
I=V/R
Explanation:
Ohm's law gives the mathematical relationship between, current, voltage and the resistance of the circuit. Its mathematical form is given by :
V = IR ....(1)
V = voltage (in volts)
I = current (in Ampere)
R = resistance (in ohms)
Equation (1) can be rewritten as :
[tex]I=\dfrac{V}{R}[/tex]
Hence, the correct relation is I=V/R.
because lighting heats up the surrounding air slowly, it realationship to thunder is currently unknown true or false
Answer:
False
Explanation:
Please tell me why did she leave?
Answer:
aye man you alright? I’m here for you if u need anything. just keep ur head king and stay strong, I’m sorry for what happened. she probs left bc she wanted another guy, lost feelings, or family/personal issues etc.
Descibe the real-world examples of Newton's third lawthat were idenified in "Applications of Newton's Laws."
Answer:
A horse pulls a cart, a person walks on the ground
Explanation:
Answer:
Know it's late but I couldn't find a good answer when I looked for it so i did it myself.
My answer:
One of the real world examples mentioned in the article was that of a rocket blasting off into space. It was explained that it's an example of Newton's third law because the rocket’s engines push on those gases (action force), and the gases push back (reaction force). This reaction shows an excellent example of Newton's third law.
Sample Response:
When gases escape downward out the tail of a rocket, they push upward on the rocket. When layers of the Earth collide, they force the Earth upward, forming mountains.
Explanation:
hope this helps <3
find the density, in g/cm3 , of a metal cube with a mass of 50.3 g and an edge length (l) of 2.65 cm . for a cube v
The density in g/cm³ of the cube is 2.70 g/cm³.
We need to know about density to solve this problem. Density is a unit that measures how dense the object is. It can be determined as mass divided by volume
ρ = m / V
where ρ is density, m is mass and V is volume.
From the question above, we know the cube have:
l = 2.65 cm
m = 50.3 gram
Find the volume of cube
V = l³
V = 2.65³
V = 18.61 cm³
Determine the density
ρ = m / V
ρ = 50.3 / 18.61
ρ = 2.70 g/cm³
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Which statement about work and power correctly describes an automobile race?
The cars do different amounts of work depending on how fast they finish.
The car that finishes last has the lowest power.
The car with the greatest power travels the greatest distance.
The cars do different amounts of work depending on their power.
Answer:
the car do different amount of work depending on how fast they finish is my answer
Explanation:
I hope so it is helpful for you
Answer: B. The car that finishes last has the lowest power.
Explanation: