Answer:
A. It will transform into other forms of energy.
Explanation:
According to the law of conservation of energy, energy is never created or destroyed. Only changed from one form into another.
10.Which of the following is true about atomic and ionic radii? A. In each period, the element with the lowest atomic number has the smallest ionic radius. B. Ionic radius is greater than atomic radius in an anion. C. The number of protons does not change so there is no difference between radii. D. The element with the lowest atomic number has the largest ionic radius in each group.
Answer:
Ionic radius is greater than atomic radius in an anion.
Option B is correct because ionic radii increase for anions and decrease for cations compared to the neutral parent atoms, due to changes in electron-electron repulsion.
The correct answer to the question about the properties of atomic and ionic radii is B. Ionic radius is greater than atomic radius in an anion. This is because when an atom gains electrons to become an anion, the increase in electron-electron repulsion causes the ion to expand. Conversely, when an atom loses electrons to become a cation, it becomes smaller than the neutral atom because the reduction in electron-electron repulsion allows the remaining electrons to be pulled closer to the nucleus by its unchanging positive charge. This result is consistent with the observations made in the provided information.
Kaya collects the data shown in the table. What is the resistance in the circuit? 0.05 1.8 5.7 20
Answer:
1.8
Explanation:
Kaya collects the data where the voltage is 6 V also the current is 0.3 A then the resistance in the circuit will be 20 ohms. Hence, option D is correct.
What is Electrical energy?When put in an electromagnetic field, charged matter experiences a force due to the fundamental property of electric charge. Positive or negative electrical ions are possible. When two charges are in opposition to one another, they repel one another.
The term "neutral" refers to an object that has no net charge. The early understanding of the way charged particles interact is now referred to as classical electrodynamics, and it is still true for issues that do not demand taking into account quant phenomena.
As per the given information in the question,
Voltage, V = 6 V
Current, I = 0.3 A
Use the equation of ohm's law,
V = RI
6 V = R(0.3)
R = 6/0.3
R = 20 Ω.
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What does a protoplanetary disk most likely have in common with Earth's Solar System?
A.
They both decrease in gravity as they accumulate more mass.
B.
They both are in motion and are held together by gravity.
C.
They both have well-defined planets that orbit due to gravity.
D.
They both have planets that have formed without gravity.
Answer:
B
Explanation:
A protoplanetary disk is most likely associated with Earth's solar system because they are both in motion and held together by gravity. So, the correct option is (B).
What is Gravity?
Gravity is also called gravitation. It is a force that exists between all material objects in the universe. When the mass of any two objects or particles is non-zero, the gravitational force that attracts them to each other.
This occurs on objects of all sizes, from subatomic particles to clusters of galaxies.
Newton's law of universal gravitation can be explained by this formula:-
[tex]F=G{\frac{m_1m_2}{r^2}}[/tex]
where, F = force
G = gravitational constant
[tex]m_1[/tex] = mass of object 1
[tex]m_2[/tex] = mass of object 2
r = distance between centers of the masses
Earth's solar system exist in motion which is held by gravity like protoplanetary disk.
Thus, a protoplanetary disk is most likely associated with Earth's solar system because they are both in motion and held together by gravity. So, the correct option is (B).
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A force that pushes or pulls is known as
O A.
an expected force.
B.
a reaction force.
OC.
an applied force.
a positive force.
Answer:
C
Explanation:
An applied force is a force that is applied to an object by a person or another object. If a person is pushing a desk across the room, then there is an applied force acting upon the object. The applied force is the force exerted on the desk by the person.
Answer:
C:
Explanation:
any force acting on an object is a positive force I believe.
Use the drop-down menus to complete the statements. are pure substances that cannot be broken down into a simpler form. are units of two or more atoms. are the smallest possible particles of an element. are pure substances made of two or more atoms of different elements.
Answer: Please see below
Explanation:
Are pure substances that cannot be broken down into a simpler form---- Element
are units of two or more atoms---- Molecule
are the smallest possible particles of an element---- an Atom
are pure substances made of two or more atoms of different elements---- Compound
An atom is the smallest unit of matter that consists of protons, neutrons and electrons. Eg the element, helium, contains atoms with two protons in the nucleus.
Eg of element, we have carbon, hydrogen, helium
Eg of a compound--- Ammonia
Eg of a molecule-----H2O (water),C6H12O6 (glucose)
Explanation:
An element is made up of
(One type of atom)
In metal wires the charged particles that move are A. protons B. electrons C. neutrons D. none of the above
Answer:
the answer is B: electrons
Explanation:
Answer:
c
Explanation:
A box contains about 5.64 x 1021 hydrogen
atoms at room temperature 21°C.
Find the thermal energy of these atoms.
Answer in units of J.
Answer:
Explanation:
Given that,
The temperature of atom is 21°C
θ = 21 + 273 = 294K.
Then, from kinetic theory,
The kinetic energy of individual elements is
K.E = 2kT/3
k is Boltzmann constant
k = 1.38 × 10^-23 J/K•particle
Then,
K.E = 2 × 1.38 × 10^-23 × 294 / 3
K.E = 2.7048 × 10^-21 J/particle
Each particle of hydrogen is 5.64 × 10²¹ particle
Total K.E = 2.7048 × 10^-21 × 5.64 × 10²¹
Total K.E = 15.26 J
Need help now due in 5 minutes
Answer:
I'm positive it's the last one
Explanation:
What is the mechanical advantage of the frictionless plane shown below?
Inclined plane
A. 0.64
B. 1.31
C. 1.4
D. 1.56
Answer:
D: 1.56
Explanation:
On a frictionless plane, W||=Wsin(θ). To push the brick up the plane, the car has to push with a force just greater than W||. To lift the brick directly, a force just greater than W must be used. The mechanical advantage is the ratio of the force needed to lift the brick directly to the force needed to lift the brick with the plane:
MA=Force needed to lift object without inclined plane/Force needed to lift object with inclined plane
MA=W/W||
MA=W/Wsin(θ)
MA=1/sin(40∘)
MA=1.56
Directions Part 2: Using what you learned about the formation of the Grand Canyon and which layer is oldest, try to answer the following mystery using the same principles.
Help
Background: Ms. Smith was expecting to get her new iPad in the mail when she got home from work. She had been telling everyone how excited she was to get the newest version. Shockingly, someone broke into her mailbox and stole it. She talked to all the people who had been at her house that day and each said they had not seen anything and that the mailbox was in good condition when they left. She determined that the last person to leave her house was likely the culprit. The diagram below shows the “footprints” left in front of the mailbox. Who was it?
Clues:
The Neighbor walks to work
The Handyman rides a bike
The Cook rides a motorcycle
The Maid drives a car
The Nephew has a dog
Answer: Neighbour
Explanation: Taken perspective from the given clues:
The Neighbor walks to work
The Handyman rides a bike
The Cook rides a motorcycle
The Maid drives a car
The Nephew has a dog
If we assume that the handyman delivered the iPad in the mailbox, then
The direction of the cook, Nephew and his dog are perpendicular to the direction of the bike of the handyman. So, it can't be the cook, Nephew and the maid.
The two suspects are the handyman and the neighbour.
If the handyman actually dropped the iPad and left, then, the neighbour should be the culprit.
3. A pendulum with a 1.0-kg weight is set in motion from a position 0.04 m above the lowest point on the path of the weight.
What is the kinetic energy of the pendulum at the lowest point?
(Hint: Assume there is no friction.)
Answer: K.E = 0.4 J
Explanation:
Given that:
M = 1.0 kg
h = 0.04 m
K.E = ?
According to conservative of energy
K.E = P.E
K.E = mgh
K.E = 1 × 9.81 × 0.04
K.E = 0.3924 Joule
The kinetic energy of the pendulum at the lowest point is 0.39 Joule
Final answer:
The kinetic energy of the pendulum at the lowest point is 0.392 J, which is found by converting the initial gravitational potential energy into kinetic energy using the principle of conservation of energy.
Explanation:
To determine the kinetic energy of the pendulum at the lowest point, we use the principle of conservation of energy, which states that the total mechanical energy in a system remains constant if there is no friction.
We know that the pendulum starts with gravitational potential energy which is completely converted into kinetic energy at the lowest point. The potential energy (PE) at the starting point is due to its height above the lowest point and is calculated as PE = mgh where m is the mass, h is the height, while g is the acceleration brought on by gravity (9.8 m/s²).
Let's calculate the potential energy at the initial height:
PE = mgh
= (1.0 kg)(9.8 m/s²)(0.04 m)
= 0.392 J
Since there is no friction, this potential energy will be entirely converted into kinetic energy (KE) at the lowest point. Therefore, the kinetic energy at the lowest point is also 0.392 J.
(multiple choice) A student is building a model roller coaster. The car rolls down from a standing start at the top of the first hill, which is 2 m high. The car fails to make it up to the top of the second hill, which is 2.1 m high. Ignoring friction and air resistance, which is MOST LIKELY the source of the problem?
A. The car has too much mass.
B. The second hill is higher than the first.
C. The car is going too fast at the bottom of the first hill.
D. The first hill is too high.
Answer:
B. The second hill is higher than the first
Explanation:
The model roller coaster car fails to reach the top of the second hill because it is higher than the first hill, and without additional energy, it can climb only as high as the starting point due to energy conservation.
The student is building a model roller coaster and the car rolls down from a 2 m high first hill and fails to make it up a 2.1 m second hill. Ignoring friction and air resistance, the most likely source of the problem is B. The second hill is higher than the first. According to the principles of conservation of energy, when the car rolls down the first hill, it converts potential energy into kinetic energy. This kinetic energy is then converted back into potential energy as the car climbs the second hill. If no energy is lost to friction or air resistance, the car should reach the same height from which it started. However, since the second hill is 2.1 m high, which is higher than the original 2 m, the car does not have enough energy to reach the top of the second hill.
A student fires a cannonball diagonally at an angle of 71° with an initial speed of 31m/s. Neglect drag and the initial height of the cannonball.
What was the cannonball's initial horizontal speed?
What was the cannonball's initial vertical speed?
How long did the cannonball rise?
What was the cannonball's total flight time?
What was the cannonball's maximum height?
How far from the cannon did the cannonball land (measured along the ground)?
Answer:
vx = 10.09 m/s
vy = 29.31 m/s
t = 5.98 s
ymax = 43.83 m
xmax = 60.37 m
Explanation:
A) The horizontal speed is constant in the complete trajectory. It is given by:
[tex]v_x=v_ocos\theta\\\\v_x=(31m/s)(cos71\°)=10.09\frac{m}{s}[/tex]
B) The vertical initial speed is:
[tex]v_y=v_osin\theta\\\\v_y=(31m/s)(sin71\°)=29.31\frac{m}{s}[/tex]
C) The flight time is given by:
[tex]t=\frac{2v_osin\theta}{g}\\\\t=\frac{2(31m/s)(sin71\°)}{9.8m/s^2}=5.98s[/tex]
D) The maximum height is:
[tex]y_{max}=\frac{v_o^2sin^2\theta}{2g}\\\\y_{max}=\frac{(31m/s)^2(sin71\°)^2}{2(9.8m/s)}=43.83m[/tex]
E) The maximum horizontal distance is:
[tex]x_{max}=\frac{v_o^2sin2\theta}{g}\\\\x_{max}=\frac{(31m/s)^2sin(2*71\°)}{9.8m/s^2}=60.37m[/tex]
Provides detailed calculations for the initial horizontal and vertical speed of a cannonball fired at an angle, its rise time, flight time, maximum height, and horizontal distance traveled.
The initial horizontal speed of the cannonball: 31m/s × cos(71°) = 10.089m/s
The initial vertical speed of the cannonball: 31m/s × sin(71°) = 29.387m/s
The time the cannonball rises: vy = uy + at, so t = (29.387m/s) / g ≈ 3 seconds
The total flight time of the cannonball: Twice the time it takes to rise ≈ 6 seconds
The maximum height of the cannonball: Using the kinematic equation h = uy² / (2g), h ≈ 44.877m
The distance from the cannon to where the cannonball lands: Horizontal distance = vx × total flight time = (10.089m/s) × 6s ≈ 60.534m
A. The boat uses a heat engine to move. This is a simple schematic of how a heat engine operates. Describe what this schematic is showing in terms of the laws of thermodynamics. (6 points)
Answer: The internal heat energy of the boat heat engine, metamorphoses into mechanical workdone that causes the boat to move.
Explanation: First law of thermodynamics tells us that energy cannot be created nor destroyed, it can only be transformed from one form to another.
The internal heat energy of the boat heat engine, metamorphoses into mechanical workdone that causes the boat to move.
According to the second law of thermodynamics which state that when energy changes from one form to another form, or matter moves freely, entropy (disorder) in a closed system increases. Differences in temperature, pressure, and density tend to even out horizontally after a while
What do you want to learn about simple machines? (could someone come up with a question about simple machines for me)
Answer:
what are simple machines lol
Explanation:
Which phrases describe all the outer planets motion? Select two options
no rotation
fast rotation
LAH
slow revolution
opposite revolution
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ՍԻՈ
Answer:
slow revolution and fast rotation
Explanation:
The energy carried by a wave is dependent upon its wavelength, frequency, and amplitude. So long as speed is constant, the energy of a wave will increase as a result of an increase in which of these characteristics?
The energy of a wave will increase with an increase in amplitude when the wave's speed is held constant. The amplitude of a wave is directly proportional to the energy it carries.
Explanation:
The energy of a wave is influenced by various factors such as its amplitude, frequency, wavelength, and speed. The question specifically focuses on how the energy will change, assuming speed is constant. Given a constant wave speed, it is the amplitude of the wave that, when increased, will result in an increase in the wave's energy. The amplitude is directly proportional to the energy carried by a wave – the greater the amplitude, the more energy the wave carries.
For mechanical waves, the energy transferred is proportional to both the square of the wave's amplitude and the square of its frequency. This means that if the frequency of the wave is doubled, the energy increases by a factor of four, assuming the amplitude remains the same. However, if the speed is kept constant, the energy increase resulting from an increase in frequency must be exchanged with a decrease in wavelength due to their inverse relationship. The essential point to remember is that, with speed being constant, increasing the amplitude of a wave will directly lead to an increase in its energy.
Newton's "quantity of motion" is conservation.
True
False
___ discharge occurs when oppositely charged objects get close enough for the air between them to become electrically charged.
Answer:
Static discharge
Explanation:
Static discharge occurs when oppositely charged objects get close enough for the air between them to become electrically charged causing electrons to flow between the oppositely charged objects leading to spark. The flow of the electron is from one charged body to another charged body is what causes the static discharge.
Charges can be built through friction, this buildup of electric charges is known as static electricity.
Electrical discharge occurs when the electric field between oppositely charged objects exceeds about 3 * 10⁶ V/m, ionizing the air and enabling a current to flow in the form of sparks or corona discharge.
The phenomenon being described is known as electrical discharge, which occurs when oppositely charged objects are brought close enough together for the air between them to become electrically conductive. When the electric field between these objects exceeds a certain threshold - about 3 * 10⁶ V/m for air - the air molecules become ionized. This leads to the flow of current and discharge in the form of sparks, like lightning, or a more gradual event known as corona discharge.
When this happens, if air was ohmic, the current would increase steadily as the voltage difference increased. However, gases are generally nonohmic, so there is zero current until the voltage reaches a point where the electrical forces tear electrons away from air molecules. Subsequently, these free electrons and positive ions create a cascade that ionizes more air molecules, resulting in an impressive electrical discharge.
An object gains a negative charge by accumulating electrons, while losing electrons makes it positively charged. In nature, we see this during thunderstorms, where the friction between water and air particles in thunderclouds creates huge charges. The sudden release of these accumulated charges towards the ground is what we witness as a dangerous lightning strike.
Which of the following are unchanged by a chemical reaction?
O
A. Products
B. Reactants
O
c. Catalysts
O
D. Energy
In a chemical reaction, c. catalysts are the substances that remain unchanged after the reaction completes as they only facilitate the reaction without being consumed.
The substances that are unchanged by a chemical reaction are the catalysts. Catalysts are substances that increase the rate of a chemical reaction without being consumed or altered in the process. They do this by lowering the activation energy needed for the reaction to proceed, which is the minimum amount of energy required to initiate the reaction.
Unlike reactants, which are the chemicals before the reaction starts and are found on the left of the arrow, and products, which are the chemicals after the reaction ends and are found on the right of the arrow, catalysts remain unchanged after the reaction is complete. Therefore, c. catalysts fit the description of being unchanged in a chemical reaction.
1.What is the contour interval of this map?
Answer:
The contour interval of the map is 50
How far does an object move if a 20 N force is applied to it doing 40 J of work?
Answer: The object moved 2 metres away
Explanation:
Given that the
Force applied F = 20 N
Work done W = 40 J
From the definition of workdone which state that: product of force and distance
W.D = F × S
Where S = distance
S = W.D/F
S = 40/20 = 2 metres
The object moved 2 metres away.
Write a reflection about what you learned and how you can reduce your carbon footprint (ecological footprint)
Answer:
You could say that you learned that humans effect the ecosystem and many big ways. You can reduce ur footprint by recycling, riding bikes instead of cars, and eating more fruits and vegetables
Explanation:
The earliest ideas of charge were the result of experiments by:
Benjamin Franklin
William Gilbert
Charles Coulomb
Isaac Newton
Answer:
The earliest ideas of charge were result of experiments by William Gilbert
Answer:
William Gilbert
What would happen to the speed of sound wave if it moved from ocean water to air
Answer:
The speed of sound in water increases with increasing water temperature, increasing salinity and increasing pressure (depth). The approximate change in the speed of sound with a change in each property is: Temperature 1°C = 4.0 m/s.
Explanation:
Answer:
It would slow down.
Explanation:
Right on Edge!
PLEASE HELPPP!!! D:
A 62 kg person jumps from a window to a fire net 20.0 m directly below, which stretches the net 1.4 m. Assume that the net behaves like a simple spring. (a) Calculate how much it would stretch if the same person was lying on it. (b) How much would it stretch if the person jumped from 38 m?
a)___
b)___
Answer:
a is 4.6 x 10-2m
b is 1x8204m
Explanation:
The fire net is actually going past zero into a negative vertical displacement. Essentially because again, we're saying that why initial equals thirty eight meters. The person is falling down to zero meters. Zero meters is where the fire that is. And then after the person stretches the fire. Yet it has a certain vertical displacement. But this particles placement is negative. So here we're going to choose the negative value. so trying to see how much of the fire net would stretch if the person was lying on tough it and if the person jumped from a height of thirty eight meters. So for here Mass is going to be equal to sixty two kilograms and why initial for party is going to be twenty meters and then why final is going to be negative one point four meters And so in order to find in order to find this is an instance, essentially, this is an instance perspective in the sense that we need this data in order to figure out this during constant so we can see that energy initial equals energy final and then we consider it mg y initial equals mg.
Mirrors reflect light and lenses absorb light.
True
False
What do you think swarming locusts affect planted crops?
Answer:
they say yum yum as they eat planets and make humans starve
Explanation:
but they still eat them
Answer:
Large swarms of locusts can completely strip the foliage and stems of plants such as forbs and grasses. ... They often eat dry plant matter on the ground and will forage for weak or dead grasshoppers when plant food is scarce. As nymphs have a large appetite, they cause more damage than adults.
Explanation:
Which tectonic plate boundary caused the structure that is circled in the image?
Answer:
Crust
Explanation:
Ahmed saw all of these things as he walked to school this morning. Which one is an example of a force pushing downward toward the ground?
A. A bird sat on a telephone wire.
B. A woman moved her child from one place to another in a wagon.
C. A man pulled weeds in his garden
D. A dog tugged on a rope a child held