Answer:
It's a individual form of life. Examples of this are bacterium , protists and fungus
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Answer:
The Potential Energy of the Swing is Changing in to Kinetic Energy when is start moving.
Explanation:
When the Swing is pull at its extreme point then it has maximum potential energy. Because the formula of potential energy is:
P.E. = (1/2)k*x^2
Here x shows the body displacement from the mean (Equilibrium) position. Since at maximum position the displacement is maximum therefore the P.E. is maximum at the extreme point.
When the Swing is released and start moving from extreme position to mean its P.E. is changing into Kinetic Energy. Because with the movement towards the mean position body acquire more speed and that speed increases its velocity. Since Kinetic Energy is given as:
K.E. = (1/2) m*v^2
Therefore with the increase in velocity kinetic energy increases.
But when body again moving towards the extreme position, its kinetic energy again changes into P.E with the same reason as I discussed in the above paragraph.
Some of the energy is also changes in to heat in order to overcome air resistance.
Kenny wants to get to Washington DC within 4 hours. Washington DC is 133 miles away from where he is. What is the avg speed he must go in order to meet his time frame ?
Particulate Motion Unit Test
1. There are two pieces of copper. Piece A is at 70 degrees, while piece B is at 150 degrees. Which piece has more thermal energy? (1 point)
Piece A, because its particles move slower
Piece B, because its particles move faster
Piece A, because its particles move faster
Piece B, because its particles move slower
2. The electrons in the copper atoms in a wire start to move when an electric potential difference is introduced. Which statement about this situation is true?(1 point)
The macroscopic movement of the electrons creates a microscopic flow of electricity.
The macroscopic movement of the electrons creates a macroscopic flow of electricity.
The microscopic movement of the electrons creates a macroscopic flow of electricity.
The microscopic movement of the electrons creates a microscopic flow of electricity.
3. Which statement describes the gravitational energy and energy stored in a magnetic field when objects are drawn close to each other?(1 point)
Both gravitational energy and energy stored in a magnetic field attract.
Both gravitational energy and energy stored in a magnetic field repel.
Gravitational energy attracts; energy stored in a magnetic field attracts or repels.
Gravitational energy attracts; energy stored in a magnetic field repels.
4. A scientist is heating a piece of metal and measuring its temperature. She observes that the temperature of the metal is rapidly increasing. Which statement is correct about the thermal energy of the metal? (1 point)
Thermal energy will increase for as long as temperature is increasing.
Thermal energy will increase for as long as the metal is in solid state.
Thermal energy will increase for as long as the metal is absorbing heat energy.
Thermal energy will increase for as long as the potential energy is zero.
5. A student places a piece of ice inside a glass beaker at room temperature and heats them until they both come to 70°C. Which statement is correct about the energies of the ice and beaker? (1 point)
The thermal energy of the beaker has increased more than the thermal energy of the ice.
The thermal energy of the ice has increased more than the thermal energy of the beaker.
The potential energy of both the ice and beaker have increased the same amount.
The kinetic energy of both the ice and beaker have increased the same amount.
6. Which energy types are both examples of energy on a macroscopic scale?(1 point)
chemical energy and gravitational potential energy
thermal energy and spring potential energy
gravitational potential energy and kinetic energy
kinetic energy and thermal energy
7. A high diver steps off the diving platform and begins falling toward the pool of water below. Which statement about this situation is correct?(1 point)
The amount of energy that is transferred to thermal energy due to friction will be greater at the the top of the fall than at the bottom of the fall.
The gravitational potential energy of the diver decreases as it changes to kinetic energy.
The kinetic energy of the diver decreases as the diver approaches the water.
The gravitational potential energy of the diver increases because of the change in thermal energy due to friction.
8. For a system that contains a rock falling through the air, which situation is always true?(1 point)
The total potential energy of the system is conserved.
The total kinetic energy of the system is conserved.
The total mechanical energy of the system is conserved.
The total energy of the system is conserved.
Answer:
1. piece b because it’s particles move faster.
2. the microscopic movement of the electrons creates a macroscopic flow of electricity.
3. gravitational energy attracts; energy stored in a magnetic field attracts or repels.
4. thermal energy will increase for as long as the metal is absorbing heat energy.
5. the thermal energy of the ice has increased more than the thermal energy of the beaker.
6. gravitational potential energy and kinetic energy
7. the gravitational potential energy of the river decreases as it changes to kinetic energy
8. the total energy of the system is conserved.
Explanation:
just took the test; these are all correct!
For a system that contains a rock falling through the air, the total mechanical energy of the system is conserved.
The piece that has a greater thermal energy is the piece that is at higher temperature because Piece B has particles that move faster. The statement that is true regarding electron movement in a copper wire is that; "the microscopic movement of the electrons creates a macroscopic flow of electricity."The energy stored in a magnetic field is related to the gravitational energy by the statement; "gravitational energy attracts; energy stored in a magnetic field attracts or repels."The statement that is correct about the metal whose temperature is increasing rapidly is; "thermal energy will increase for as long as temperature is increasing."The statement that is true about the ice inside a glass beaker is that; "the kinetic energy of both the ice and beaker have increased the same amount."The energy types that are both examples of energy on a macroscopic scale are chemical energy and gravitational potential energy.As the diver steps off the diving platform and begins falling toward the pool of water below, the gravitational potential energy of the diver decreases as it changes to kinetic energy.For a system that contains a rock falling through the air, the total mechanical energy of the system is conserved.Learn more about mechanical energy: https://brainly.com/question/15025401
a submarine is observed to rise from a real depth of 80 cm to 60 cm in water calculate the change in apparent depth
please help!!!!!!!!!!
Answer:
15m
Explanation:
change in real depth = 80 - 60 = 20m
Let us assume that the index is 4/3
Refractive index = change in real depth ÷ change in apparent depth
change in apparent depth = change in real depth÷ refractive index
= 20÷(4/3) = 20×(3/4) = 5×3 = 15m
what kind of energy is called mechanical energy?
Answer:
can be called kinetic or potential energy
Explanation:
Deanna’s niece loves to swing at the local playground, so Deanna takes her and pushes her on the swing. Deanna must use (motion / transfer / force / energy) to exert a (transfer / motion / force / energy) that causes the swing to change (force / energy / motion / transfer/position). Answer PLsssssss
Answer:
Force
Motion
position
Explanation:
Deanna's niece loves to swing at the local playground, so Deanna takes her and pushes her on the swing. Deanna must use force to exert a motion that causes the swing to change position.
A force is a push or pull on a body. The type of force applied by Deanna is called a contact force because Deanna's hand is in contact with the swing. When the force is applied, the swing moves and motion occurs. The to and fro movement of the swing is the motion resulting from the applied force. So, as motion occurs, the position of the swing changes.When an object is dropped what happens to potential and kinetic energy as it falls
Answer:
potential energy decreases
kinetic energy increases
How much heat is required to increase the temperature of 1 kg of steel from 21 °C to 22 °C?
9,000 j
306j
1j
500j
Answer:
466J
Explanation:
Given parameters:
Mass of steel = 1kg = 1000g
Initial temperature = 21°C
Final temperature = 22°C
Unknown:
Amount of heat required for this temperature increase = ?
Solution:
To solve this problem, we use the expression below:
So;
Heat absorbed = mass x specific heat of steel x change in temperature
Specific heat of steel = 0.466J/g°C
Therefore;
Heat absorbed = 1000 x 0.466 x (22 - 21) = 466J
help me, please with this queastion
Answer:
Kinetic energy is the energy due to motion. Potential energy is energy stored in matter. The joule (J) is the SI unit of energy and equals (kg×m2s2) ( kg × m 2 s 2 ) .
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An incident on route 12 summary?I need to describe what happens in the book in a short summary can anyone help?
Answer: An Incident on Route 12 is presented here in a high quality paperback edition. This popular classic work by James H. Schmitz is in the English language, and may not include graphics or images from the original edition.
Explanation: I HOPE THAT HELPED
3. An earthquake occurs at 12:02 p.m. A seismic station records the first S-wave at 12:19 p.m. Which set
of data shows the approximate arrival time of the first P-wave and the distance to epicenter
Answer:
what y'all teachers be on
What do u mean by 1 energy work?
Answer:
In physics we say that work is done on an object when you transfer energy to that object. If one object transfers (gives) energy to a second object, then the first object does work on the second object. Work is the application of a force over a distance. ... Energy can be defined as the capacity for doing work.
How fast does a 500 Hz wave travel if its wavelength is 0.5 m?
Answer:
250 m/s
Explanation:
Answer:
250m/s
Explanation:
Frequency = velocity/wavelength
Then rearrange,
Velocity = frequency x wavelength
Velocity = 500 x 9.5 = 250m/s
A girl running around a circular track of radius 200 m completes one
revolution in 10 minutes. What is her average velocity in one full
revolution
Answer:
v = 2 m/s
Explanation:
First, we find the angular velocity of the girl by using the following formula:
[tex]Angular\ Velocity =\omega= \frac{Angular\ Distance\ Covered}{Time\ Taken}\\\\\omega = \frac{1\ revolution}{10\ min}\frac{1\ min}{60\ s}\frac{2\pi\ rad}{1\ revolution}\\\\\omega = 0.01\ rad/s[/tex]
Now, for the average velocity of the girl we can use the following formula:
[tex]Average\ Velocity = V = r\omega\\V = (200\ m)(0.01\ rad/s)\\[/tex]
where,
r = radius = 200 m
therefore,
v = 2 m/s
Does heat cause kinetic energy to increase or decrease? Why?
Answer:
When the temperature of an object increases, the average kinetic energy of its particles increases. When the average kinetic energy of its particles increases, the object's thermal energy increases. Therefore, the thermal energy of an object increases as its temperature increases.
Explanation:
teacher drops a book to wake up his class, and the book hits the ground after 0.5 seconds. How high was the book?
A rat is pushed with a massive force. The mass of the rat is 2.3 kg and the acceleration of the rat is 9.5 m/s^2. What was the force applied to the rat?
21.85 N
4.1 m/s^2
0.24 N
22 N
Answer:
Force = 21.85N
Explanation:
Given the following data;
Mass = 2.3kg
Acceleration = 9.5m/s²
To find the force;
Force is given by the multiplication of mass and acceleration.
Mathematically, Force is;
[tex] F = ma[/tex]
Where;
F represents force.
m represents the mass of an object.
a represents acceleration.
Substituting into the equation, we have
Force = 2.3 * 9.5
Force = 21.85N
Therefore, the force applied to the rat is 21.85 Newton.
The table shows the specific heat capacities of various substances. An iron block of mass 2kg is heated. Calculate the amount of energy needed to raise its temperature from 20°C to 30°C. Use the table to help you.
Answer:
9000 J
Explanation:
What is the phase of the Moon when 100% of the Moon appears to be lit up?
Answer:
full moon is the answer to question
Au, Ag, and Cu are all metals. What characteristics will these three elements have in
common?
a. Poor conductors of heat, poor conductors of electricity, and dull
b. Shiny, good conductors of heat and electricity
c. Semiconductors or heat and electricity and used as chips in computers and phones
Answer:
B
Explanation:
If 15 C passes a point in a circuit in 5.0 s, the current in the circuit is:
Answer:
I = 3 Amp
Explanation:
Current in a Conductor
The electric current that moves through a conductor is defined as the charge Q that passes through it per unit time.
[tex]\displaystyle I=\frac{Q}{t}[/tex]
The SI unit for the current is the Ampere. One ampere is the current that flows when one coulomb of charge passes a point in a circuit in one second.
It's known that a charge of Q=15 C passes a point in a circuit in 5 seconds, thus the current is:
[tex]\displaystyle I=\frac{15\ C}{5\ s}[/tex]
I = 3 Amp
The current in the circuit is 3 A.
The current in the circuit can be calculated using the formula below.
Formula:
C = Q/t............... Equation 1Where:
C = Current in the circuitQ = Charge passing through the circuitt = time.From the question,
Given:
Q = 15 Ct = 5.0 sSubstitute these values into the equation.
C = 15/5C = 3 AHence, the current in the circuit is 3 A.
Learn more about current here: https://brainly.com/question/1100341
A laser beam from Earth is reflected by a mirror placed on the Moon. If the speed of the beam is 3.00 x 108 m / s and the distance from Earth to the Moon is 3.81 x 108 m, how long in seconds will the laser beam take to return to its starting point?
Answer:
1.27seconds
Explanation:
Speed = 324 m/s , Distance = 411.48m
Time = Distance/Speed
Time = 411.48/324 seconds
Time = 1.27seconds ( Ans)
Usually, large amount of curent flows in a
Circuit due to two reasons ———— and ————.
Answer:
Explanation:
Possible causes for overcurrent include short circuits, excessive load, incorrect design, an arc fault, or a ground fault. Fuses, circuit breakers, and current limiters are commonly used overcurrent protection (OCP) mechanisms to control the risks
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A 2kg ball rolls down the hill. By the time it is at the bottom the balls kinetic energy is 25 J. What is the velocity at the bottom of the hill
Calculate the velocity(v) at the bottom of hill.
Solution:As we know ,
[tex] \bf\: Kinetic \: energy = \dfrac{1}{2} \times m \times {v}^{2} [/tex]
[tex] \red \bigstar \bf \: putting \: the \: values[/tex]
[tex] \rightarrow \: 25 = \dfrac{1}{2} \times 2 \times {v}^{2} [/tex]
[tex] \rightarrow \: 25 \times 2 = 1 \times 2 \times {v}^{2} [/tex]
[tex] \rightarrow \: 50 = 2 \times {v}^{2} [/tex]
[tex] \rightarrow \: {v}^{2} = \cancel \dfrac{50}{2} [/tex]
[tex] \rightarrow \: {v}^{2} = 25[/tex]
[tex] \rightarrow \: v = \sqrt{25} [/tex]
[tex] \rightarrow \: v = 5 \: m {s}^{ - 1} [/tex]
What is the speed of a wave with a wavelength of 5 m and a frequency of 6.0 Hz
which of the following is example of convection check all that apply
a metal rod in a fire place
light from the sun heated the earth
air circulating in a hot air balloon
water boiling
Answer air circulating in a hot air balloon
Explanation:
why is solid carbon dioxide known as dry ice
Hey there..
It gets this name because it does not melt into a liquid when heated; instead, it changes directly into a gas (a process known as sublimation).
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Date:
A body has a mass m and velocity v , if the mass is increased to 4 times and velocity is decreased to 2 times calculate the ratio of kinetic energy
Explanation:
Mass = m
Velocity = v
If Mass is increased 4 times = 4m
New velocity = 2v
Kinetic Energy
[tex] \frac{1}{2}m {v}^{2} [/tex]
So it will be 1/2 × 4m × 2v × 2v
[tex]8m {v}^{2} [/tex]
so Kinetic Energy will increase 4 times
If you were to look at grains of table salt with a magnifying glass, you would see that each grain is a little cube. Why are salt grains cubical?
Answer:
All extended structure compounds form cubes. Sodium and chlorine atoms both have cubical shapes. In the extended structure of NaCI, atoms are arranged in a cubical pattern
What happens to the force between the objects if Mass 2 decreases? (increases, decreases
affected)
