If the velocity of an airplane is doubled, then its kinetic energy
will increase by a factor of
Answer:4
Explanation:
If the velocity of an airplane is doubled, then its kinetic energy will increase by a factor of four.
What is kinetic energy?The ability of an object to do work by virtue of its motion.
The kinetic energy is represented mathematically as
K.E = 1/2 mv²
where v is the velocity with which the object is moving and m is its mass.
When the velocity is doubled, kinetic energy is
K.E' = 1/2 m(2v)²
K.E' =4 x ( 1/2 mv²)
Thus, airplane's kinetic energy will increase by a factor of four.
Learn more about kinetic energy.
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Which element accumulates in the environment due to the use of
fertilizers?
A. oxygen
B. hydrogen
C. nitrogen
D. carbon
To Find :
Which element accumulates in the environment due to the use of fertilizers.
Solution :
Most of the fertilizers used in daily practice are nitrogen fertilizers .
When soil became waterlogged, soil organisms take the oxygen they need from nitrates, leaving the nitrogen in a gaseous form which escapes into the air.
Also, nitrogen is very stable and did not participate in most of the reactions.
So, nitrogen is accumulates in the environment .
Therefore, option C. is correct.
A compressed spring stores 720 J of energy. A 1 kg block rests on the end of the spring. The spring is released and comes back to its uncompressed length pushing the block away. What is kinetic energy of the block as it leaves the spring? What is the speed of the block at this instant?
Answer:
the kinetic energy of block will be equal to energy stored in spring ie 720 J
the speed of block will be 37.9 m/s
Explanation:
E = m v^2 / 2
v = sqrt (2 * E / m)
v = sqrt (2 * 720 J / 1 kg) = 37.9 m/s
what are em waves expain in details
What happens to the pressure as air rises from the ground into the atmosphere?
Does it increase or decrease?
Answer:
please try brainlist answer
As the atmosphere expands the further you get from the Earth's surface, it becomes less dense and air pressure decreases. As you increase altitude (distance from Earth's surface) in an airplane, air pressure changes
कृपया ब्रेनलिस्ट का उत्तर केवल 1more उत्तर देने का प्रयास करें।
Where does the kinetic energy people get during the sport come from?
Answer:
kinetic is the stored energy being released from being dormant
Explanation:
Answer:
kinetic is the stored energy being released from being dormant
Explanation:
i copied
You eat a salad for lunch then go to swimming practice. The energy transformation that happens would be:
Answer:
Chemical to Mechanical
Explanation:
Chemical energy is food and then you are putting it to work and it would be known as Mechanical.
A sheep is walking at 1.6 m/s. How long will it take to go 3600 m?
Answer:
2,250 seconds or 37.5 minutes
Explanation:
EZ POINTS
20. An object's kinetic energy is a combination of its: A. mass and weight B. distance and direction C. mass and velocity D. volume and direction
Answer:
A.
Explanation:
B,C,D is not right because those do not pay a factor on kinectic energy
The questions are the yellow boxes. Pls hurry
What force would need to be added downwards to have this 2kg object accelerate at
5 m/s/s downward and 1.5 m/s/s to the left?
Answer:
Explanation:
The earth’s gravity is pulling on you. Are you pulling on the earth? Explain your reasoning.
Answer:
yes we do because every object that has mass produces gravitational force relative to how much mass it has
Explanation:
can you please help me
What does the REVOLUTION of Earth around the Sun bring us and how long does it take?
Answer:
takes 365 days and it bring us seasons such as, spring,winter and fall.
What would be the formula if you
wanted to solve for the
acceleration?
Answer:
acceleration = final velocity - initial velocity / time
V-U/T
Explanation:
Acceleration (a) is the change in velocity (Δv) over the change in time (Δt), represented by the equation a = Δv/Δt.
When a 0.292 kg mass on a string is swung at 8.45 m/s, it feels a centripetal acceleration of 78.9 m/s^2. What is the radius of the swing? (Unit = m)
Answer:
0.905
Explanation:
right answer
The radius of the swing is 0.905 m
Circular motionFrom the question, we are to determine the radius of the swing
Using the centripetal acceleration formula
[tex]a_{c}= \frac{v^{2} }{r}[/tex]
Where [tex]a_{c}[/tex] is the centripetal acceleration
v is the velocity
and r is the radius
From the given information,
v = 8.45 m/s
[tex]a_{c} = 78.9 \ m/s^{2}[/tex]
Then,
[tex]78.9 = \frac{8.45^{2} }{r}[/tex]
[tex]r = \frac{8.45^{2} }{78.9}[/tex]
[tex]r = \frac{71.4025}{78.9}[/tex]
r = 0.905 m
Hence, the radius of the swing is 0.905 m
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When one wave crest overlaps the crest of another and they add together what happens to the amplitude?
A: stays the same
B: decreases
C: increases
When one wave crest overlaps with the crest of another and they add together and their amplitude increases. Hence, C is correct.
What is amplitude ?Amplitude of a wave is the distance from the midpoint of a crest to its top or the distance from the midpoint of a trough to its bottom. For a wave the peak to the top is called crest and peak to the bottom or decline is called troughs.
When two waves overlap by crest of one wave and trough of another wave, then their amplitude will decrease and it is called destructive interference.
Amplitude of a wave is directly related to its intensity. High amplitude waves are intense. When two waves overlaps by their crests and add up together their amplitude will be the sum of amplitudes of both waves. This is called constructive interference. Hence, option C is correct.
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Why do temperatures differ between air, land, and water?
Answer:the ocean water isn't moving into or through the atmosphere as a result of the sun's heating of the water, convection isn't the process influencing air and water temperature difference. The heat of the ocean is being given off radiated into the air, making the air substantially warmer
Explanation:
is the text in red correct (0n0')
A bicyclist with a mass of 50 kg is traveling at a rate of 30 m/s. It accelerates to a rate of 50 m/s in 5 seconds. What is the net force acting on the bicycle?
Answer:
200 N
Explanation:
There is only two needed factors in play here; the mass and acceleration
According to Newton's 2nd Law: F = m*a
Now Acceleration is Velocity over Time, so we have another factor in play: Acceleration = 50-30/5 = 20/5 = 4m/s^2
Net force = (50 kg)(4 m/s^2) = 50*4 = 200 Newtons
What are electromagnetic waves?
Answer:
Em are waves that are created as a result of vibrations between an electric field and a magnetic field.
Explanation:
Answer:
Electromagnetic waves or EM waves are waves that are created as a result of vibrations between an electric field and a magnetic field. In other words, EM waves are composed of oscillating magnetic and electric fields.
A changing magnetic field will induce a changing electric field and vice-versa the two are linked. These changing fields form electromagnetic waves.This means that electromagnetic waves can travel not only through air and solid materials, but also through the vacuum of space.
Fun fact - The first oranges weren’t orange
The original oranges from Southeast Asia were a tangerine-pomelo hybrid, and they were actually green. In fact, oranges in warmer regions like Vietnam and Thailand still stay green through maturity.
What is your ideal high school experience?
Answer:
High school sucks lol
Explanation:
Answer:
ever watched the movie mean girls.......... i wish it was like that lol
A student pulls horizontally on a block with a spring scale. The block reads 24.5 Newtons before the block starts to move. It reads 23.7 Newtons as she pulls the block at a constant velocity. How should she explain this?
Answer:
The coefficient of friction causes the force on the object to be less than its initial reading on the spring scale.
Explanation:
Since the block reads 24.5 N before the block starts to move, this is its weight. Now, when the block starts to move at a constant velocity, it experiences a frictional force which is equal to the force with which the student pulls.
Now, since the velocity is constant so, there is no acceleration and thus, the net force is zero.
Let F = force applied and f = frictional force = μN = μW where μ = coefficient of friction and N = normal force. The normal force also equals the weight of the object W.
Now, since F - f = ma and a = 0 where a = acceleration and m = mass of block,
F - f = m(0) = 0
F - f = 0
F = f
Since the force applied equals the frictional force, we have that
F = μW and F = 23.7 N and W = 24.5 N
So, 23.7 N = μ(24.5 N)
μ = 23.7 N/24.5 N
μ = 0.97
Since μ = 0.97 < 1, the coefficient of friction causes the force on the object to be less than its initial reading on the spring scale.
For every action, there is an equal and opposite reaction” is a definition of _________
Answer:
These two forces are called action and reaction forces and are the subject of Newton's third law of motion. Formally stated, Newton's third law is: For every action, there is an equal and opposite reaction. The statement means that in every interaction, there is a pair of forces acting on the two interacting objects.
Answer: action, opposite
Explanation:
A rectangular block measures 4.1 cm by 2.8 cm by 2.1 cm.
Calculate its volume giving your answer to an appropriate
number of significant figures.
Answer:v=l x w x h
Explanation:
h=height
w=width
l=length
Answer:
24.108 cm3
Explanation:
4.1x2.8x2.1
24.108cm3
A horizontal bar 1.5 metres long and of small cross-section rotates about vertical axis through one end. It accelerates uniformly from 1200 r.P.M. To 1500 r.P.M. In an interval of 5 seconds. What is the linear velocity at the beginning and end of the interval ? What are the normal and tangential components of the acceleration of the mid-point of the bar after 5 seconds after the acceleration begins ?
Answer:
a. i. 188.49 m/s. ii. 235.62 m/s. b. i. 117.81 m/s² ii. 4.71 m/s²
Explanation:
a. Since the linear velocity v = rω where r = radius of path = length of horizontal bar = 1.5 m and the initial angular speed ω₀ = 1200 r.P.M = 1200 × 2π/60 = 125.66 rad/s and final angular speed after the 5 seconds ω₁ = 1500 r.P.M = 1500 × 2π/60 = 157.08 rad/s
i. So, the initial linear velocity v₀ = rω₀ = 1.5 m × 125.66 rad/s = 188.49 m/s.
ii. The final linear velocity v₁ = rω₁ = 1.5 m × 157.08 rad/s = 235.62 m/s.
b. The mid-point of the bar is at a distance of one-half from the end of the bar. So its radius r' = r/2 = 1.5 m/2 = 0.75 m
i. Its normal acceleration a after the 5 seconds is a = r'ω₁² = 0.75 m × 157.08 rad/s = 117.81 m/s²
ii. Its tangential acceleration is given by a' = r'α where α = tangential acceleration
α = (ω₁ - ω₀)/t where t = 5 seconds
α = (157.08 rad/s - 125.66 rad/s)/5 s
= 31.42 rad/s ÷ 5 s
= 6.28 rad/s²
a' = r'α
= 0.75 m × 6.28 rad/s²
= 4.71 m/s²
Which is a feature of a cladogram?BY MOHAMED
I GIVEING A !)) 100 point RIGHT NOW ASP
Answer:
Constructed cladograms all typically share certain key features: Root – The initial ancestor common to all organisms within the cladogram (incoming line shows it originates from a larger clade) Nodes – Each node corresponds to a hypothetical common ancestor that speciated to give rise to two (or more) daughter taxa.
Explanation:
Answer:
one feature of a cladogram is a branch that shows you relations among animals
Explanation:
The force that acts on an object lying on a surface, acting in a direction perpendicular to the surface is called ____________
Ronald observes a large island off the coast of Indonesia on a map. A few months later, he observes that there are many smaller islands in place of the large one he had seen earlier. Which of these could have caused this change?
Answer:
idgaf
Explanation:
lol
What makes the eardrum vibrate?
Answer:
The sound waves are gathered by the outer ear and sent down the ear canal to the eardrum. The sound waves cause the eardrum to vibrate, which sets the three tiny bones in the middle ear into motion. The motion of the three bones causes the fluid in the inner ear, or cochlea, to move.
~+lil more info+~
The sound waves go through the ear canal into the middle ear, which includes the eardrum (a thin layer of tissue) and three tiny bones called ossicles. The sound causes the eardrum to vibrate. The ossicles amplify these vibrations and carry them to the inner ear.