Answer:
Well, The first question is C. Both potential and kinetic energy increase. Then, The second question is C. Cell wall. And, The last one is B. Sedimentary rocks ate compacted. Good Luck!
What evidence (data) would support the claim that an increase inhuman population contributes to the emission of greenhouse gases?
A. greenhouse gas production has leveled off once the global population reached a certain number
B. amount of greenhouse gases produced varies with the level of development a country has reached
C. greenhouse gas emissions per individual humas has decreased over the past 30 years
D. 10 countries with the largest populations are the countries that produce the most greenhouse gases
Anand gets into an elevator and travels 50 m straight up in a time of 5 s. He then travels in the opposite direction, straight down, for 70 m in a time of 6 s. What is his average speed and velocity, respectively, over the 11 s period?
A. 10.9 m/s, 1.82 m/s
B. 10.9 m/s, −1.82 m/s
C. 21.8 m/s, 10.9 m/s
D. −10.9 m/s, 5.2 m/s
Answer:
10.9 m/s, −1.82 m/s
Explanation:
We have,
Anand gets into an elevator and travels 50 m straight up in a time of 5 s. He then travels in the opposite direction, straight down, for 70 m in a time of 6 s.
Total time of journey is 11 seconds.
Total distance is 50 m + 70 m = 120 m
Total displacement is 50 m - 70 m = -20 m
Average speed, [tex]s=\dfrac{120\ m}{11\ s}=10.9\ m/s[/tex]
Average velocity, [tex]v=\dfrac{-20\ m}{11\ s}=-1.82 \ m/s[/tex]
So, the correct option is (b) 10.9 m/s, −1.82 m/s.
Disabling asthma attacks can lead to restrictive school activity of approximately
Answer:
Yes.Explanation:
If we want to "disable" astham attacks, that would imply too many restictions for those people who can suffer from these attacks. For example, in order to avoid these attacks, they couldn't do sport activities, because that would alter their respiratory system, which occasionate astham attacks.
Therefore, this statement is true.
Using the diagram below, calculate the PE and KE of the ball at the top, middle, and bottom of a drop. SHOW YOUR WORK!!
Write an explanation of what would happen to the ME, PE, and KE of the ball from the top of the drop to the middle of the drop, and then at the bottom.
Answer:
At the top
K.E = 0
P.E = 981 J
Mechanical energy is conserved
P.E is maximum
K.E = 0
At the middle
K.E = 981 J
P.E = 0
Mechanical energy is conserved
K.E is maximum
P.E = 0
At the bottom
K.E = 0
P.E = 981 J
Mechanical energy is conserved
K.E = 0
P.E is maximum
Explanation:
Given that
M= 5kg
H = 20 m
t = 7 s
According to conservation of energy,
At the top
K.E = 0
P.E = mgh
P.E = 5 × 9.81 × 20
P.E = 981 J
Mechanical energy is conserved
P.E is maximum
K.E = 0
At the middle
K.E = 981 J
P.E = 0
Mechanical energy is conserved
K.E is maximum
P.E = 0
At the bottom
K.E = 0
P.E = 981 J
Mechanical energy is conserved
K.E = 0
P.E is maximum
Given that
M= 5kg
H = 20 m
t = 7 s
At the top
K.E = 0
P.E = mgh
P.E = 5 × 9.81 × 20
P.E = 981 J
Mechanical energy is conserved
P.E is maximum
K.E = 0
At the middle
K.E = 981 J
P.E = 0
Mechanical energy is conserved
K.E is maximum
P.E = 0
At the bottom
K.E = 0
P.E = 981 J
Mechanical energy is conserved
K.E = 0
P.E is maximum
Explanation:
Given that
M= 5kg
H = 20 m
t = 7 s
At the top
K.E = 0
P.E = mgh
P.E = 5 × 9.81 × 20
P.E = 981 J
Mechanical energy is conserved
P.E is maximum
K.E = 0
At the middle
K.E = 981 J
P.E = 0
Mechanical energy is conserved
K.E is maximum
P.E = 0
At the bottom
K.E = 0
P.E = 981 J
Mechanical energy is conserved
K.E = 0
P.E is maximum
An object falling to the ground has decreasing kinetic
energy and increasing potential energy. Do you agree? Why or why not
PLEASE HELP AS SOON AS POSSIBLE
I WILL MARK YOU AS BRAINLIEST
Answer:
Energy exists in different forms, all of which can be classified as either potential energy or kinetic energy. Potential energy is energy stored in an object due to its position or arrangement. Kinetic energy is energy of an object due to its movement - its motion.
so it would be the other way around
Explanation:
Answer:
As an object falls it gains kinetic energy whilst losing potential energy.
Dinesh wants to launch a package over the garden wall to his friend on the other side. His plan is to set up a see-saw, put the package on one end and jump on the other end. Dinesh determines that he will land on the board with a force of 1,127 newtons, and the package weighs 322 newtons. The board he is going to use for the see-saw is 9 meters long. How close to the end of the board should Dinesh put the fulcrum?
Answer:
Dinesh should put the fulcrum 2 m from himself and 7 m from the package.
Explanation:
Let the fulcrum be x meters from Dinesh's end.
The sum of clockwise moment must balance the sum of anti-clockwise moment.
Taking a moment about the fulcrum
(Force exerted by Dinesh) × (Distance of Dinesh from the fulcrum) = (Weight of the package) × (Distance of the package from the fulcrum)
Force exerted by Dinesh = 1127 N
Distance of Dinesh from the fulcrum = x m
Weight of the package = 322 N
Distance of the package from the fulcrum = (9 - x) m
1127 × x = 322 (9 - x)
1127x = 2,898 - 322x
1127x + 322x = 2,898
1449x = 2898
x = (2898/1449) = 2 m
Hence, Dinesh should put the fulcrum 2 m from himself and 7 m from the package.
Hope this Helps!!!
Please help, I have no idea what the answer to this is and I did not learn it in class ;-;
Answer:
Gravitation.
Explanation:
The space where the planets are is absolutely empty, so there is no friction. The planets may have some magnetism, but magnetic forces are negligible when compared to the Gravitational force over the planets due to the Sun mass. The equation which describes the Sun's force is: F = [tex]\frac{G.msun.mplanet}{r^{2} }[/tex] which is the famous Newton's gravitational law. Radiation from other stars doesn't contribute to the planets' motion, which is elliptical trajectory.
2. What other physical quantity might be more important to weightlifters than
how much actual work they do?
Answer:
The pressure on their bone
Center of mass & balance.
PLEASE HELP In a bag are 7 red, 9 blue, 2 yellow and 4 green marbles. If you draw out a marble at random, what the probability that you will draw a red or blue marble? P(red ∪ blue) Question 7 options: 7/22 11/22 16/22 18/22 Q
Answer:
16/22
Explanation:
you add red and blue together
Please help! I'll mark you as branliest!!! :)
Answer:
pretty sure its C, Radiation because the sun produces radiation
Explanation:
Answer: conduction
Explanation:
The sand is directly transferring heat to the people. They are touching, so it would be an example of conduction.
What happens to inertia as you increase the mass?
A neutral atom has the same number of electrons as it does neutrons.
O A. True
O B. False
Answer:
B
Explanation:
It is true that a neutral atom has the same number of electrons as it does neutrons.
The neutrons are neutral particles, whereas the electrons are negatively charged particles.
Instead of neutrons, a neutral atom has an equal number of protons and electrons. Because they have no charge, neutrons are electrically neutral particles. The negative charge of the electrons in the electron shells encircling the nucleus in a neutral atom balances the positive charge of the protons in the nucleus. In a neutral atom, the number of protons and electrons is therefore identical, but the number of neutrons is variable.
Hence, It is true that a neutral atom has the same number of electrons as it does neutrons.
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Find the acceleration of a car with the mass of 1,200 kg and a force of
11 x 103 N.
a
9.2 m/s2
b 5 m/s2
c 2 m/s
d 10 m/s2
Answer:9.17 m/s^2
Explanation:
mass=1200kg
Force=11 x 10^3 N
Acceleration=force ➗ mass
Acceleration=11 x 10^3 ➗ 1200
Acceleration=9.17
Acceleration=9.17 m/s^2
what are the 2 processes involved in parents passing on their genes?
Answer:Chromosomes are passed from parents to offspring via sperm and eggs. The specific kind of chromosome that contains a gene determines how that gene is inherited.
Explanation:
A TV draws 0.867 A of current when connected to a 122 V outlet. It’s resistance is 140.71.
A.)How many electrons pass through the TV per minute?
B.)How much electrical energy does the TV convert to other forms of energy
per minute?
Answer:
Explanation:
current measures charge flowing per second .
A current of .867 A means charge of .867 coulomb is flowing per second
charge flowing per minute = .867 x 60
= 52.02 coulomb
one electrons carries a charge of 1.6 x 10⁻¹⁹ Coulomb
So no of charge flowing per minute
= 52.02 / 1.6 x 10⁻¹⁹
= 32.5 x 10¹⁹ .
B )
electrical energy consumed per minute
= V X I X t , V is volt , I is current and t is time .
= 122 x .867 x 60
= 6346.44 J .
As velocity increases, what happens to momentum?
A. It stays the same
B. It increases
C. It decreases
Answer:
B. it increases
Explanation:
Remember that momentum = mass * velocity. So momentum and velocity are directly proportional, so as velocity increases, so will momentum of the object.
Answer:
If velocity of an object increases then moment would also get increased.
Explanation:
Velocity and mass are directly proportional to momentum.
hope it helps!
how are magnetic field lines and electric field lines alike
Matter in which particles are arranged in repeating geometric patterns is a ______.
Question 9 options:
solid
liquid
gas
plasma
solid is the state of matter which it's particles are arranged in such pattern
A flowerpot that has a mass of 1.5 kg is sitting on a windowsill 30 meters from the ground. Is the energy of the flowerpot potential of kinetic?
How much energy does the flowerpot have?
Answer:
Potential energy
441 joules
Explanation:
The flower pot is not moving so it does not have kinetic energy. Anything that is still and a distance from the ground does have potential energy.
Amount of energy: p=mggh
p=1.5(9.8)(30)=441 joules
The flower pot's energy is measured in potential energy since it is remaining stationary and the energy is stored, the flowerpot is not moving about so it is not kinetic energy.
The formula for potential energy is:
GPE = mgh
The m stands more mass, the g stands for gravitational energy (9.8m/s^2) and the h stands for height.
Our values for the following terms are:
M = 1.5kg
G = 9.8m/s^2
H = 30 meters
Now, we can plug it into our formula to solve for the amount of potential energy.
GPE = 1.5(9.8)(30)
First, let's multiply the gravitational energy and the height.
30 x 9.8 = 294
Then, multiply the mass by the result.
1.5 x 294 = 441
Therefore, the potential energy of the flowerpot is 441J.
Which factors affect the speed of ocean waves?
Answer:
The speed of all ocean waves is controlled by gravity, wavelength, and water depth. Most characteristics of ocean waves depend on the relationship between their wavelength and water depth. Wavelength determines the size of the orbits of water molecules within a wave, but water depth determines the shape of the orbits
Explanation:
PLEASE GIVE ME BRAINLIEST
Microwave,radio signal,light,earthquake which does not belong
Answer:
earthquake does not belong to electromagnetic waves
this is about Electrostatics
Answer:
Force, [tex]F=2.88\times 10^{-3}\ N[/tex]
Explanation:
Charge 1, [tex]q_1=1\times 10^{-7}\ C[/tex]
Charge 2, [tex]q_2=-2\times 10^{-7}\ C[/tex]
Distance between charges, d = 0.25 m
It is required to find the force between charges. The charges are opposite the force between them is attractive. The force between charges is given by :
[tex]F=\dfrac{kq_1q_2}{d^2}\\\\F=\dfrac{9\times 10^9\times 1\times 10^{-7}\times 2\times 10^{-7}}{(0.25)^2}\\\\F=2.88\times 10^{-3}\ N[/tex]
So, the force between charges is [tex]2.88\times 10^{-3}\ N[/tex].
PLEASE HELP The Hertzsprung-Russell diagram shown here suggests that the stars with BOTH the highest temperature AND greatest absolute
magnitude are
A) giants
B)Super giants
C) White dwarfs
D) stars similar to the sun
Answer:
White dwarfs because you look at where the highest temperature is and where is the highest magnitude. Fun fact, the sun will become a white dwarf.
Explanation:
The Hertzsprung-Russell diagram shown here suggests that the stars with Both the highest temperature and greatest absolute magnitude are:
C) White dwarfs
"Hertzsprung-Russell diagram"The Hertzsprung-Russell diagram shown here suggests that the stars with Both the highest temperature and greatest absolute magnitude are White dwarfs.
White dwarf stars (glow lesson D) are the ultimate developmental organize of moo to middle mass stars, and are found within the foot cleared out of the HR chart.
These stars are exceptionally hot but have moo radiances due to their little size.
Thus, the correct answer is C.
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What does ROCAPV mean?
Answer: Rancho de Area Comunes PV
Explanation: it means
Rancho de Area Comunes PV
In an AC Monte Roca PV System Profile, where the following are depicted:
Location
Commissioning
Production
Operator
PV system power
Module
And communication.
Are you willing to do a project?
Answer:yes
Explanation: what project
A student measured the volume of three rocks. The diagram above shows the
results of her investigation. Which correctly orders the rocks from least to
greatest?
A. Rock A, Rock B, Rock C
B. Rock C, Rock A, Rock B
C. Rock B, Rock C, Rock A
D. Rock A, Rock C, Rock B
Answer:
option B is right
...............
Answer: A C B
Explanation:
If you look closely the water levels show which is bigger fun fact.
The absolute magnitude of a star is the amount of light received by Earth. true or false
Answer:
FALSE
Explanation:
Answer: false its the apparent
Explanation:
Yosef is playing with different kinds of rubber bands. Some are very narrow and some are quite wide. Yosef is curious about the rubber bands, and develops this scientific question: Does the width of a rubber band affect how easily it can be stretched?
He decides to develop a hypothesis to test this scientific question. What could Yosef's hypothesis be?
Answer:
He could have many different hypothesis, but here is one.
Explanation:
If rubber bands are wider, then the rubber bands will stretch further, because the wider a rubber band is the stronger it is.
At what point in a waterfall, do the drops of water contain the most gravitational potential energy?
Answer:
The water above receives energy as it falls down the short waterfall. This energy was stored as potential energy in the gravitational field of the Earth and came out of storage as the water dropped. This energy which came out of the gravitational field ended up being expressed as the kinetic energy of the water. That is, the water gains kinetic energy as it drops. An ounce of water is going faster when it hits the bottom of the waterfall than it was when it went over the top of the waterfall
Explanation:
The drops of water contain the most gravitational potential energy at the top before they start falling.
At the top of the waterfall
GravitationAt the top of the waterfall, the water drops have the most gravitational potential energy before they start falling as the water at the peak of the waterfall is higher in the Earth's gravitational field and has gravitational potential energy. The potential energy is converted to kinetic energy when it falls. As a result, energy is not created; it was always there, stored as potential energy.
Potential energy is energy that is stored and is determined by the relative positions of various pieces of a system. Kinetic energy is the energy that an item or particle has as a result of its movement.
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A softball has a (positive/negative) acceleration when it is thrown. A soft ball has a (positive/negative) acceleration when it is caught
Answer:
A softball has a positive acceleration when it is thrown. A softball has a negative acceleration when it is caught.
Explanation:
