Answer:
1- Evidence:because you are performing it with your body part that is why it is physical change.
2- Evidence:Chemical change will occur because in this we are combining different substances.
3- Evidence:its a physical change because we are performing a task.
4- Evidence:its Chemical change because we are performing an experiment.
please mark me as brainestHow do you solve properties of parallel lines cut by transversal?
When the alternative interior angles of two lines cut by a transversal line are equal, they are parallel.
Alternate interior angles are two angles on the inside side that are opposite each other. When the alternate exterior angles of two lines cut by a transversal line are equal, they are parallel. Alternate external angles are two angles on the outside that are opposite each other. Four sorts of angles are created when parallel lines are sliced by a transversal. Examine the diagram below to identify the many pairs of angles and their relationships. The picture depicts two parallel lines 'a' and 'b' separated by a transversal 'l'.
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The reaction between magnesium (Mg) and oxygen (O2) forms magnesium oxide (MgO).
a. Write a balanced chemical equation to represent this reaction.
b. Identify the type of reaction this represents.
Answer:
2 Mg + O2 = 2MgO
Type: Synthesis
explain the working principle of inverter
An inverter is an electrical device that transforms DC (direct current) to AC (alternating current). An inverter's operation is based on the assumption of electronic switching.
An inverter is made up of three major components: a direct current input source, an oscillator, and an output transformer. The oscillator produces a high-frequency alternating current signal, which is subsequently supplied to the output transformer. The output transformer subsequently raises the voltage of the alternating current signal to the required level.
A battery or a DC power supply can be used as the DC input source. The oscillator is commonly a transistor or a collection of transistors that alternately turn on and off the DC input at a high frequency. The output transformer has two or more copper coils, and the ratio of the coils determines the voltage of the output signal.
When the DC input is turned on, the oscillator begins to create the high-frequency alternating current signal, which is then delivered into the output transformer. The transformer amplifies the voltage of the alternating current signal and generates the alternating current output.
This is the working principle of Inverter.
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100 J of work was done to lift a 10-N rock and set it at Position A near the edge of a cliff.
1. If the 100 Joules of work lifted the rock to the top of the cliff, how much potential energy did the rock gain?
2. At point C, the rock's potential energy will be
3. The rock's kinetic energy at point A is
4. At point B, some of the rock's potential energy will be changed to Kinetic energy
5. What is the mass of the rock?
6. What is the rock's velocity just before it hits the ground?
The rock to the right is sitting at the top of a ramp. I wonder how much work it required to get that rock up there.
Can you figure it out?
Please show work!
Please Help!!
By using the concept of work and energy, the below are the answers
1. 100J
2. 100J
3. 0
4. Total energy = K.E + P.E
5. 1.02 kg
6. 14 m/s
Given that 100 J of work was done to lift a 10-N rock and set it at Position A near the edge of a cliff.
1. If the 100 Joules of work lifted the rock to the top of the cliff, how much potential energy did the rock gain?
Work is the product of force and the distance.
The potential energy gained by the rock will be equal to work done in lifting up the rock which is 100 J
2. At point C, the rock's potential energy will be equal to the work done.
That is, at point C, P.E = 100J
3. The rock's kinetic energy at point A is Zero.
That is, at point A, K.E = 0
4. At point B, some of the rock's potential energy will be changed to Kinetic energy. Yes. Because the Total energy = K.E + P.E
5. What is the mass of the rock?
Weight W = mg
where g = 9.8m/s^2
W = 10N
Substitute both into the formula
10 = 9.8m
make m the subject of the formula
m = 10/9.8
m = 1.02 kg
6. What is the rock's velocity just before it hits the ground
Work done = Energy
That is, Work done = maximum P.E = maximum K.E
100 = 1/2m\(v^{2}\)
Substitute mass into the formula
200 = 1.02\(V^{2}\)
V = \(\sqrt{196}\)
V = 14 m/s
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The frame of reference for an outside observer of a moving
bus might be a house across the street.
-TRUE
-FALSE
Answer:
false
Explanation:
the _____ of an element tells you the amount of protons that the atom carries.
Answer:The number of protons, neutrons, and electrons in an atom can be determined from a set of simple rules. The number of protons in the nucleus of the atom is equal to the atomic number (Z). The number of electrons in a neutral atom is equal to the number of protons.
Explanation:
List two things you should not do when encountering a funeral procession?
party and being happy..........
Water travels, in a 2km long pipeline at a maximum flow rate of 0.12 m/s. The internal diameter of the pipe is 300 mm, pipe wall thickness is 5 mm, and is manufactured from steel with a Young's modulus of 210x109 Pa. The pipeline is constructed within an excavated trench and surrounded by backfill material. A control valve on the downstream end of the pipeline uniformly closes in 12 seconds. (a) Calculate the pressure transients at the mid-point of the pipeline (b) How does friction in pipeline effect the calculated (in Q6 (a)) pressure transients
(A) The pressure transients at the mid-point of the pipeline are approximately 1,208,277 Pa.
(B) Friction in the pipeline affects the calculated pressure transients by increasing the overall resistance to flow
(a) The pressure transients at the mid-point of the pipeline can be calculated using the water hammer equation. Water hammer refers to the sudden changes in pressure and flow rate that occur when there are rapid variations in fluid flow. The equation is given by:
ΔP = (ρ × ΔV × c) / A
Where:
ΔP = Pressure change
ρ = Density of water
ΔV = Change in velocity
c = Wave speed
A = Cross-sectional area of the pipe
First, let's calculate the change in velocity:
ΔV = Q / A
Q = Flow rate = 0.12 m/s
A = π × ((d/2)^2 - ((d-2t)/2)^2)
d = Internal diameter of the pipe = 300 mm = 0.3 m
t = Pipe wall thickness = 5 mm = 0.005 m
Substituting the values:
A = π × ((0.3/2)^2 - ((0.3-2(0.005))/2)^2
A = π × (0.15^2 - 0.1495^2) = 0.0707 m^2
ΔV = 0.12 / 0.0707 = 1.696 m/s
Next, let's calculate the wave speed:
c = √(E / ρ)
E = Young's modulus of steel = 210x10^9 Pa
ρ = Density of water = 1000 kg/m^3
c = √(210x10^9 / 1000) = 4585.9 m/s
Finally, substituting the values into the water hammer equation:
ΔP = (1000 × 1.696 × 4585.9) / 0.0707 = 1,208,277 Pa
Therefore, the pressure transients at the mid-point of the pipeline are approximately 1,208,277 Pa.
(b) Friction in the pipeline affects the calculated pressure transients by increasing the overall resistance to flow. As water moves through the pipe, it encounters frictional forces between the water and the pipe wall. This friction causes a pressure drop along the length of the pipeline.
The presence of friction results in a higher effective wave speed, which affects the calculation of pressure transients. The actual wave speed in the presence of friction can be higher than the wave speed calculated using the Young's modulus of steel alone. This higher effective wave speed leads to a reduced pressure rise during the transient event.
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Why are paperclips attracted to magnets? Group of answer choices They contain silver They contain aluminum They contain tin They contain iron
Answer:
They contain iron.
Explanation:
Iron is made of metal and magnets attract to metal Iron.
what is acceleration of gravity
Answer:
Verified answer
Explanation:
Make me as brain liest plz
What is electromagnetic induction?
Explanation:
Hope it helps~
Answer:
Electromagnetic or magnetic induction is the production of an electromotive force across an electrical conductor in a changing magnetic field.
Explanation:
correct me if im wrong:)
how many kilocalories are in a meal that contains 100 grams of carbohydrate, 20 grams of protein, and 10 grams of fat?
A meal containing 100 grams of carbohydrate, 20 grams of protein, and 10 grams of fat would contain approximately 570 calories or 0.57 kilocalories.
1 gram of carbohydrate contains 4 calories, and therefore 100 grams of carbohydrate contains: 100 × 4 = 400 calories.
1 gram of protein contains 4 calories, and therefore 20 grams of protein contains: 20 × 4 = 80 calories.
1 gram of fat supplies the body with 9 calories, and therefore 10 grams of fat contains: 10 ×9 = 90 calories.
Adding the total caloric values from carbohydrate, protein, and fat would give us a total of: 400 + 80 + 90 = 570 calories. Since 1 kilocalories (kcal) is a unit of energy equal to 1,000 calories, therefore 570 calories are equal to: 570 ÷ 1000 = 0.57 kilocalories.
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A person bungee-jumping from a bridge. The person is attached to a long elastic rope . At one point during the fall, she reaches her maximum speed.
State her acceleration at this point.
The bungee jumper's acceleration is zero when she achieves her top speed. This is due to the fact that acceleration is the rate at which velocity changes, and since velocity is constant at maximum speed, there is neither change nor acceleration.
What is the bungee jumper's greatest rate of acceleration?This is evident because when the bungee cord is completely stretched, the upward force is at its strongest. Within 2.4 seconds, or in the midst of the second free-fall phase, the jumper arrived at the highest position. Around -9.8 m/s2 of downward acceleration is present.
When someone bungee jumps, what force is used?The elastic force from the bungee cord pushing up against the jumper as it expands slows his descent and temporarily stops him.
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What is 6.02 x 10^4 in standard notation
Un cuerpo de 3,5 kg se encuentra en reposo sobre un plano inclinado 37o. Está sujeto al extremo superior del plano inclinado mediante un muelle de constante recuperadora 15 N/m. Sabiendo que el coeficiente de rozamiento vale 0,6, calcula el alargamiento del muelle. Sol: 42 cm.
Answer:
1,1 m
Explanation:
Dado que;
coeficiente de fricción = 0,6
sabemos que W = R = mgcos 37 = 3.5Kg * 10m / s ^ 2 * cos37 = 27.95 N
coeficiente de fricción = fuerza / reacción normal (R)
Fuerza = 0.6 * 27.95 N
Fuerza (F) = 16.77 N
Recuerda que F = Ke
dónde;
K = constante de fuerza (15N / m)
e = extensión (lo desconocido)
e = F / K
e = 16,77 N / 15 N / m
e = 1,1 m
A uniform beam weighing 1 N is used as a metre rule. The beam is supported by a pivot
at the 30 cm mark. A 12 N weight is hung at the 0 cm mark and a 2 N weight is hung at the
60 cm mark as shown in Figure 5.19.
O cm
50 cm 60 cm
100 cm
수
► Figure 5.19
30 cm
mark 1 N
12 N
2 N
W
What is the weight W of a mass hung at the 100 cm mark in order to balance the beam?
Please help!
Answer:
then you solve two torque one is anticlockwise and one is clock wise toque 1=force*perpendicular distance is equal to torque 2= force* perpendicular distance so tau = torque 1+ torque 2and give your answer
Answer:
W = 4 N (to balance the beam)
Explanation:
take moment at support Δ
∑M at Δ = 0 (note: clockwise is + and counter clockwise is - )
0 = W(100 - 30) + 2(60-30) + 1(50-30) - 12(30)
0 = W70 + 2(30) + 1(20) - 360
0 = W70 + 60 + 20 - 360
0 = W70 - 280
280 = W70
W = 280 / 70
W = 4 N (to balance the beam)
to take the reaction at support Δ
Δ = 12 + 1 + 2 + 4
Δ = 19 N
proof that W = 4
∑M at 12N = 0
0 = 19(30) - 1(50) - 2(60) - W(100)
0 = 570 - 50 - 120 - 100W
100W = 400
W = 400 / 100
W = 4 N -------- ok
At a particular temperature, the speed of sound is 330 m/s and its frequency is 990 Hz. Choose the correct wavelength of this sound wave.
m
Answer:
1/3 M
I hope this helps :) sorry its late
Answer:
1/3 m
Explanation:
When you walk into a dark room and turn the light on, do the electrons travel all the way from the switch to the light?
Answer:
Yes
Explanation:
This is because for the light to come on, electric current has to flow through it which is due to electron motion. As the electrons move through the light, it turns electrical energy to light energy, so the light comes on.
Why must the nurse check the flow rate after changing the gown of a patient who is receiving intravenous fluids infused by gravity?
The nurse will check the flow rate of the infusion after a gown change because handling the intravenous tubing and container can disrupt the flow rate.
What is intravenous fluids ?Intravenous fluids, sometimes abbreviated as "IV fluids," are liquids that are administered to replace water, sugar, and salt that you may need if you're ill or having surgery and are unable to eat or drink regularly. Through a drip, IV fluids are administered directly into a vein.
Examples include D5W, which is dextrose (sugar) in water, and normal saline, which is salt in water. Lactated Ringer's is another illustration, which includes salt, chloride, potassium, calcium, and lactate. It is employed for forceful fluid replacement.Learn more about Intravenous fluid here:
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16. when water freezes in a closed jar both its volume and its pressure increase,eventually bursting the jar. does this violate the second-order conditionpv < 0? explain.
Water freezing in a closed jar and causing it to burst does not violate the second-order condition (pv < 0). This is because when water freezes, it undergoes a phase transition from liquid to solid, causing its volume to increase due to the formation of a crystalline structure.
However, this condition does not apply to water in a closed jar when it freezes and eventually bursts the jar. This is because water is not a gas and does not behave like a gas. When water freezes, it undergoes a phase change from a liquid to a solid, which results in a decrease in volume. However, this decrease in volume is accompanied by an increase in pressure because water expands when it freezes.
In summary, the second-order condition does not apply to water in a closed jar when it freezes and eventually bursts the jar because it is not a result of adiabatic expansion or compression of a gas. Instead, it is a phase change of a liquid, which results in an increase in pressure as the volume decreases.
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The only planet in the solar system with the temperature that can support life is
Answer:
earth
Explanation:
its the only planet.
7. A volcanic island arc is formed when
Name three input components
Answer:Examples of input devices include keyboards, mouse, scanners, cameras, joysticks, and microphones.
pls mark brainliest
Explanation:
A wave is moving at 300m/s and has a frequency of 25Hz, what is the wavelength?
Answer:
12 metre
Explanation:
Wavelength = Velocity / Frequency
Wavelength = 300m/s / 25 Hz
Wavelength = 12 metre
what is practical machine?
Explanation:
A practical machine is a simple machine that losses energy and have parts that have weights, friction and it causes some loss of work done.
The following statements that correctly describe the modulus of elasticity, E:
The modulus of elasticity, E, is a measure of a material's stiffness and ability to resist deformation when a force is applied. It is defined as the ratio of stress to strain within the elastic range of the material. In other words, it describes how much a material will stretch or compress under a given force.
The modulus of elasticity is important because it allows engineers to predict how materials will behave under different conditions, such as temperature changes, loading conditions, and other factors. It also helps to determine the maximum load a material can withstand before it starts to deform or break.
In detail, the modulus of elasticity is a fundamental property of a material that describes its ability to resist deformation when subjected to external forces. It is calculated by measuring the stress and strain of the material and using the equation E = σ/ε, where σ is stress and ε is strain.
The modulus of elasticity is important in many areas of engineering, such as structural design, materials science, and mechanics. It helps to ensure that structures and materials are designed and tested to withstand the loads and stresses they will be subjected to, and it provides a basis for comparing different materials and choosing the best one for a particular application.
In summary, the modulus of elasticity, E, is a material property that describes its stiffness and resistance to deformation. It is correctly determined using Hooke's Law and is crucial for predicting the mechanical behavior of materials when subjected to stress.
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Light travels at a constant 3.0x10^8m/s.
If the moon is 3.84x108 meters from the earth, how much time would it take the light from the moon to reach the earth?
Answer:
mulitipy the numbers and u will get the answer!!
A rubber ball dropped from a height of 50
m
rebounds at every impact from the floor to a height half of that from which it has fallen. Find the total distance described by the time it comes to rest.
The total distance described by the rubber ball before it comes to rest is 100 meters.
At the first drop, the ball falls from a height of 50 meters, and then rebounds to a height of 25 meters. So, the distance covered in the first drop and rebound is 50 + 25 = 75 meters.
At the second drop, the ball falls from a height of 25 meters and rebounds to a height of 12.5 meters. So, the distance covered in the second drop and rebound is 25 + 12.5 = 37.5 meters.
At the third drop, the ball falls from a height of 12.5 meters and rebounds to a height of 6.25 meters. So, the distance covered in the third drop and rebound is 12.5 + 6.25 = 18.75 meters.
This process repeats until the height of the rebound is less than 0.01 meters, at which point we consider the ball to have come to rest.
The total distance covered by the ball is the sum of all the distances covered during each drop and rebound, which is:
75 + 37.5 + 18.75 + 9.375 + 4.6875 + 2.34375 + ...
This is a geometric series with first term 75 and common ratio 1/2. Using the formula for the sum of an infinite geometric series, we get:
total distance = 75 / (1 - 1/2) = 100 meters.
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what is the main function of an engine cut-off switch?
Which quantity is a vector?
displacement
distance