Answer:
An electrical current is an electrical charge flowing around a circuit. Carried by billions of tiny particles called electrons, the charge is already in the wires.
Explanation:
There are three basic conditions for the electric current flow is to be given below:-
The loop must be shuttered where current throws occur. There must be some possible distinctions in the chain. The medium in which current flows will be a conductor (but flow in the semiconductor at a higher temp. current).
Give a specific example of a vector quantity. Explain why this type of quantity would be used to describe this event.
Answer:
Vector Quantities Increase/Decrease in Temperature - The measurement of the medium's temperature is a scalar quantity; the measurement of the increase or decrease in the medium's temperature is a vector quantity. Velocity - The measurement of the rate at which an object changes position is a vector quantity.
Explanation:
Answer: velocity has a magnitude and a direction. This quantity is useful in every day lives in many ways. for example when you are driving in a car, its good to know the velocity in which the car is going.
Explanation: sorry its late
a car travels 60 km in 2 hours 84 km the next 1 hour and then 68 km in 8.9 hours before reaching its destination what was the cars average speed in km / h
Answer:
17.8 km/hr
Explanation:
Average speed = distance / time
The total distance traveled is 60 km + 84 km + 68 km = 212 km.
The total time is 2 hr + 1 hr + 8.9 hr = 11.9 hr.
The average speed is 212 km / 11.9 hr = 17.8 km/hr
Which object has the least amount of kinetic energy?
Spinning top
Ball rolling water falling out of cup
Roller coaster
Answer:
Not sure about the answer but I think its roller coaster
Explanation:
Answer:
golf ball
Explanation:
it is correct on edge
The temp of equal masses of three different liquids A,BandC are 12°C,19°Cand 28°Crespectively . The temp when A and B are mixed is 16°C, and when Band C are mixed is 23°C.The temp when A and C are mixed is
Answer:
19.1°C
Explanation:
If A and B mix to give 16°C, A has risen by 4°C and B has fallen by 3°C;
If B and C mix to give 23°C, B has risen by 3°C and C has fallen by 5°C;
This means the energy transfered to cause a change of 3°C in B causes a change of 4°C in A and 5°C in C;
We can use this as a ratio (4:5);
The temperature difference between A and C is 16°C;
we add the two parts of the ratio (4+5) to get 9 and divide the temperature difference to get 16/9;
Next we multiply this by one of the parts of the ratio, so with 4, you get 64/9;
This number is the proportional temperature change in A upon mixing;
We then add this to the original temperature of A to get the resultant temperature of the mix like so:
64/9 + 12 = 19.1111...
You can do this alternatively using the other part of the ratio;
We would multiply the 16/9 by the 5 instead of the 4 to get 80/9;
This number is the proportional change in temperature in C upon mixing
Then subtract this from this from the original temperature of C and you should get the same answer:
28 - 80/9 = 19.1111...
What is D ?
Its name the wave diagram.
B: Crest
A: Trough
C: wavelength
I think can someone check that. I think D might be amplitude but i don’t know.
Answer:
wave height ( H)
Explanation:
it is the total summation of crest and trough
Help ASAP please (: The waves with the MOST energy have
amplitudes.
frequencies and
A) low; large
B) low; small
C) high; large
D) high; small
Answer: C
high; large
Explanation:
The wave energy is related to its amplitude and frequency.
The wave energy is proportional to the amplitude of the wave. So, wave with the most energy will have high amplitude.
Also, frequency is related to wave energy. The larger the frequency, the more the energy of the wave.
Therefore, The waves with the MOST energy have high amplitudes and large
frequencies.
If the frequency of a wave is
1000 waves per second, how long does it
take for one wave to pass a certain point?
Answer: the answer is D its in the book If u have it
Explanation:
What is general relativity
4. How does a molecule differ from an atom? (4 points)
Which of these correctly describes what would happen to a system if 100 J of heat energy is added to it?
1. The potential energy of the system will increase and this will increase the attraction between its particles.
2. The strength of the bonds in system will increase and this will decrease the speed of its particles.
3. The kinetic energy of the system will increase and this will increase the speed of its particles.
4. The kinetic energy of the system will decrease and this will decrease the speed of its particles.
The correct statement to describe that when a 100 J of heat energy is added to the system, then the kinetic energy of the system will increase and the speed of the particles will also increase. Hence, option 3 is correct.
What is Kinetic energy?The force that an object has because it is moving is known as kinetic energy in physics. It is defined as the quantity of effort required to accelerate anybody of a specific mass from rest to its specified velocity. The body keeps its kinetic energy after acquiring it during acceleration, barring changes in speed.
When slowing from its current pace to a condition of rest, the body expends the very same amount of energy. Any term in the Lagrangian of a system that has a derivative in regard to time is formally referred to as kinetic energy.
When the energy is added to the system the gap between the particles will increase due to which the velocity of the molecules will increase and with increase in the velocity the kinetic energy will also increase automatically.
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What is true about an electric field around a positive charge?
A The electric field points inward.
B The electric field points in both directions.
C The electric field points outward.
Answer:
C
Explanation:
the electric field point radically away from the charge
Question 1(Multiple Choice Worth 2 points)
(01.01 MC)
Once a scientist has made a hypothesis, what would they typically do next?
O Analysis
O Testing
O Research
O Sharing
Answer:
Testing
Explanation:
Scientific methods are the steps that scientists follow to find an answer to the questions and to find solutions to the problems. There are certain steps which are followed chronologically in the scientific method:
asking questionsmaking observationsforming a hypothesistesting the hypothesisanalyzing the resultsdrawing conclusioncommunicating the results6. The peak value of an AC sine wave is
120 V. What's the effective value
(rounded)?
A. 65 V
B. 85 V
C. 200 V
D. 140 V
Answer:
B. 85 V
Explanation:
E(rms) = E(peak-to-peak) / squareroot(2)
E(rms) = 120V / 1.414 = 84.9 V
(When rounded) = 85 V
The correct option about peak value and effective value of AC sine wave is, “85 V”.
What are the differentiating factors between peak value and effective value?Peak value is also known as maximum value.Effective value is also known as RMS (Root Mean Square) value.Maximum value attained by Alternating quantity is defined as Peak value.The square root of average of the square of quantity during a complete cycle is defined as Effective Value. How to do the conversion between peak value and effective value?To convert peak value to effective value, divide the peak value by √2 and the result will be the effective value.To convert effective value to peak value, multiply the effective value with √2 and the result will be the peak value.How to solve this question?Peak value = 120 V (Given)
Effective value = Peak value ÷ √2
Effective value = 120 ÷ √2
Effective value = 85 V (approximately)
Thus, we can conclude that by dividing the peak value by √2, we will get effective value and multiplying the effective value with √2 will give peak value as result.
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_______ force can be thought of as either a push or a pull, as long as it
makes the object move in a circular path.
Answer: Centripetal
Explanation: The centripetal force refers to the acting on a body moving in a circular path. This force acts in the direction of the center of rotation. The centripetal force is given by :
F = mv^2 / r
Where m = mass of th body
v. = Velocity
r = radius of the circular path.
For an object to move in a circular path, the force required is called the centripetal force. It is measured in Kgms^-2. It is directly proportional to the product of the Mass and square of it Velocity and varies inversely to the Radius of its path.
Heat always flows from a what place to a what place
Answer:
Heat is always the transfer of energy from an object at a higher temperature to an object at a lower temperature.
Explanation:
Answer:
Heat flows from high temperature to low temperature
Explanation:
the answer also may vary it can also be the heat flows from a warmer to colder place
hope this helped!
The throwback PFD is which type?
Answer:a
Explanation:
The throwback PFD is a Type III PFD. This type of PFD is designed for calm, inland water, or where there is a good chance of quick rescue. THe correct option is C.
Type III PFDs will not turn unconscious wearers to a face-up position, so the wearer may have to tilt their head back to avoid turning face down.
Type III PFDs have the same minimum buoyancy as Type II PFD. Float coats, fishing vests, and vests designed for various water sports are examples of Type III PFDs. Some Type III PFDs are designed to be inflated upon entering the water.
Offshore life jackets of Type I are suited for all areas, notably open, choppy, or isolated regions where rescue may be delayed and offer the highest buoyancy. Near-shore vests of Type II PFDs are designed for calm inland water or situations where there is a good probability of prompt rescue. Throwable PFDs of Type IV are suitable for usage in open water as well as calm, heavily used inland waters where assistance is always available. Special-purpose PFDs known as Type Vs are made for activities like kayaking and whitewater rafting.
The throwback PFD is not a Type I PFD because it does not provide the most buoyancy and is not designed for all waters. It is not a Type II PFD because it is not intended for calm, inland water or where there is a good chance of quick rescue. It is not a Type IV PFD because it is not intended for calm, inland water with heavy boat traffic, where help is always present. It is not a Type V PFD because it is not designed for specific activities such as kayaking or whitewater rafting.
Therefore, the correct option is C. type III.
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how has E=MC2 helped us with our understanding of how stars like our Sun create energy?
Answer: please find the answer in the explanation
Explanation:
E = MC^2
Where
E = energy
M = mass
C = speed of light.
This equation is an eyes opener about the relationship between matter and energy. Its explanation about how matter can become energy and how energy can also give information about matter.
It helps us to understand the fusion and fission of both sun and star particles which eventually give us the result of the magnitude of energy they emit or radiate.
Can anyone help me with this question? ASAP
15 points
Explanation:
PRIMERO ENCUENTRAS LA COMPONENTE x
x = 5.9 m(cos62°) + 7.8 m(cos 29°) = 9.6 m
AHORA LA COMPONENTE y
y = 5.9 m(sen 62°) - 7.8 m(sen 29°) = 1.4 m
PARA ENCONTRAR DESPLAZAMIENTO:
R = [tex]\sqrt{(9.6 m)^{2} + (1.4 m)^{2}}[/tex] = 9.7 m
ILL MARK YOU THR BRAINLIEST SOMEONE PLS HELP ITS URGENT.
The acceleration of a skydiver of mass 80 kg changes from 9.8 m/s ^ 2 to 5.8 m/s ^ 2 as he falls through the air. What is the air resistance experienced by him?
Answer:
320N
Explanation:
Net force =w- AR
AR=w -force
AR=mg- ma
AR=80*9.8- 80*5.8
AR=784- 464
AR=320N
Please help and show workings.
Effective resistance = 2+1.5 = 3.5 ohms
Current in the circuit = 1.2 A
Lost volts in the battery = 1.8V
Current in one of the 3 ohms resistors = 0.6 A
I hope it helps
The mean diameter of the Earth is 12.76 x 103 km. What is the surface area of the Earth in m2 ?
(A) 4.01 x 107
(B) 5.12 x 1014
(C) 1.09 x 1021
(D) 1.68 x 109
(E) 2.05 x 1015
Answer:
The Answer is B
Explanation:
Hope this Helps :D
Come up with an example of classical conditioning in your own life or in the real world. Be sure to identify the unconditioned stimulus, unconditioned response, conditioned stimulus, and conditioned response. Also explain, in this example, how extinction would occur.
Answer: All learning occurs through interactions with the environment; The environment ... In the before conditioning phase, an unconditioned stimulus is paired with an ... In our example, the conditioned response would be feeling hungry when you heard ... reinforce the salivation response to make sure the behavior is well learned.
What happens to the average kinetic energy of water molecules as water freezes
A. It increases as the water releases energy to its surroundings
B. It increases as the water absorbs energy from its surroundings
C. It decreases as the water releases energy to its surroundings
D It decreases as the water absorbs energy from its surroundings
Answer:
C. It decreases as the water releases energy to its surroundings
Explanation:
The energy that is possessed in the body because of the motion is said to be kinetic energy. When the water freezes, the kinetic energy of the water molecules decreases as the particles stop motion. The energy is released in the surrounding. Freezing takes place when the liquid molecules slow down and lose the kinetic energy to form the solid crystals.
Which statement correctly describes gravity?
O an attractive force that acts between all objects through contact
O an attractive force that acts between all objects without contact
O a repulsive force that acts between all objects through contact
a repulsive force that acts between all objects without contact
The second one is best. Gravity is an attractive force that acts between all objects, whether they're in contact or not.
Gravity is an attractive force that acts between all objects, whether they're in contact or not.
What is gravity?Gravity, also called gravitation, in mechanics, is the universal force of attraction acting between all matter. It is by far the weakest known force in nature and thus plays no role in determining the internal properties of everyday matter.
On the other hand, through its long reach and universal action, it controls the trajectories of bodies in the solar system and elsewhere in the universe and the structures and evolution of stars, galaxies, and the whole cosmos.
On Earth, all bodies have a weight, or downward force of gravity, proportional to their mass, which Earth’s mass exerts on them. Gravity is measured by the acceleration that it gives to freely falling objects. At Earth’s surface, the acceleration of gravity is about 9.8 metres (32 feet) per second per second.
Thus, for every second an object is in free fall, its speed increases by about 9.8 metres per second. At the surface of the Moon, the acceleration of a freely falling body is about 1.6 metres per second per second.
Hence Gravity is an attractive force that acts between all objects, whether they're in contact or not.
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Which of the following describes an electric motor? Check all that apply. A. Is found in many appliances with moving parts, like a vacuum cleaner or a blender B. Uses the interaction between a spinning coil of wire and a magnet C. Can be powered by a hand crack D. Changes mechanical energy to electrical energy
Answer:
i believe a
Explanation:
If you drew magnetic field lines for this bar magnet, which statement would be true?
Arrows point away from south and toward north.
Arrows point toward both north and south.
Arrows point away from north and toward south.
Arrows point away from both north and south.
Answer:
the arrows would point away from the north and towards the south.
Explanation:
magnetic field lines form loops around the magnet and they start at the north pole and end at the north pole, meaning that the arrows on a diagram would point away from the north and towards south.
*PLS READ: so sorry I made a mistake in my answer, the loops formed start at the north and END AT THE SOUTH POLE!! I'm so sorry :(
Answer:
The answer is C.) Arrows point away from Norht and towards South.
Explanation:
I took the K12 quiz. The picture is linked at the bottom of my answer. Hope you have an awesome day! Good luck!
1. What is the inductance of a series RL circuit in which R= 1.0 K ohm if the current increases to one-third of
its final value in 30 micro s?
Answer: the answer is C its in the book
Explanation:
Which of the answers shows three examples of a physical change
If a (hypothetical) atom with 30 protons and 44 neutrons undergoes alpha decay:
how many protons will be left in the nucleus?
how many neutrons will be left in the nucleus?
Answer:
Protons = 28
Neutrons = 42
Explanation:
Alpha decay is one of radioactive decay in which the atomic nuclei can be illustrated by the emission or loss of helium particles of mass number 4 and proton number of 2
Because mass number is the sum of protons and neutrons, If a (hypothetical) atom with 30 protons and 44 neutrons undergoes alpha decay, 28 protons will be left in the nucleus and 42 neutrons will be left in the nucleus.
A group of students gather for some fun during their summer break from school. Kendall and Jacoby have a water balloon fight during one of those “lazy” days of summer.
Marie, Gary, and Lois remember a video about work that their science teacher, Ms. Lewis, showed them before they left for vacation.
Marie says: “If Kendall throws a water balloon at Jacoby, there is no work being done. It’s just boys being boys.”
Gary says: “If Kendall throws a water balloon at Jacoby, there is work being done by Jacoby because he has to run.”
Lois says: “If Kendall throws a water balloon at Jacoby, there is work being done because Kendall had to exert a force that made the water balloon travel a certain distance to hit Jacoby.”
Which one of them is correct and why? Answer in complete sentences! You can type on this document and turn in.
Answer:
lois is right because throwing the water balloon is exerting a force running is not
