how can we calculate the e.m.f of the battery?.
Answers
Explanation:
The emf is equal to the work done on the charge per unit charge (ϵ=dWdq) when there is no current flowing. Since the unit for work is the joule and the unit for charge is the coulomb, the unit for emf is the volt (1V=1J/C).
Answer:
The EMF or electromotive force is the energy supplied by a battery or a cell per coulomb (Q) of charge passing through it. The magnitude of emf is equal to V (potential difference) across the cell terminals when there is no current flowing through the circuit. (byjus)
Explanation:
Related Questions
Thermal energy is the energy
an object has due to the
of the
particles.
Answers
Answer:
due to the heating of particles
Melissa is riding on a carousel at a distance of 8.0 m from the center of the ride. She travels at a speed of 1.3 m/s. Melissa has a mass of 45 kg.
A) What is Melissa’s acceleration?
B) What is the net force on Melissa?
Answers
Answer:
(A) The acceleration of Melissa is 0.211 m/s²
(B) The net force on Melissa is 9.5 N
Explanation:
Given;
radius of the carousel, r = 8.0 m
speed of Melissa, v = 1.3 m/s
mass of Melissa, m = 45 kg
(A) The acceleration of Melissa is given by centripetal acceleration;
[tex]a_c = \frac{v^2}{r} \\\\a_c = \frac{1.3^2}{8}\\\\a_c = 0.211 \ m/s^2[/tex]
(B) The net Force on Melissa is given by centripetal force;
[tex]F_c = ma_c\\\\F_c = 45 *0.211\\\\F_c = 9.5 \ N[/tex]
A race car accelerates from 0 m/s to 30.0 m/s in 5 seconds. What is the vehicle's acceleration?
Answers
Answer:
Acceleration = 6 m/s²
Explanation:
Given:
Initial velocity u = 0 m/s
Final velocity v = 30 m/s
Time taken t = 5 second
Find:
Acceleration
Computation:
v = u + at
30 = 0 + (a)(5)
30 = 5a
Acceleration = 30 / 5
Acceleration = 6 m/s²
The kinetic energy of an object depends upon its _____ *
2 points
A. mass and resiliency
B. elasticity and weight
C. speed and mass
D. speed and distance
Answers
Engineers tasked with building a car bumper need high-quality plastic that is readily available. They found the material polycarbonate, which is long-lasting and not too costly.
Which is on technological design criterion they have already met?
1) be available
2)be attractive
3)be durable
4)be safe
Answers
Answer:
3) Be durable
Explanation:
It says that ¨ They found the material polycarbonate, which is long-lasting and not too costly.
A reader's
read
is the extent to which he or she is engaged with or focused on what is being
activity level
background knowledge
purpose
text
I DONT KNOW WHAT THESE SUBJECT IS IN BUT IF U SEE THIS PLS HELP ME PLSSSSS!!!!!
Answers
Answer:
activity level
Explanation:
Which of the following is most likely to happen when energy is transferred to
an object?
A. The object will stay exactly the same.
B. The force on the object will decrease.
o
C. The object will begin to move.
D. The mass of the object will increase.
AUTEM
Answers
Answer:The object will begin to move
Explanation:
A chocolate lab puppy can sprint at a speed of 5.7 m/s. How far will the puppy run in 13 seconds?
Please help this is due soon!!
Answers
Hope this helped please mark brainliest! :D
A car moves at the constant speed of 20 m/s along a straight track for 12 seconds. Calculate how far it travels in meters in this time.
Answers
The distance traveled by car with a constant speed of 20m/s is equal to 240m.
What is speed?The speed of an object can be defined as the distance traveled by the object in a definite time interval. The speed is a scalar quantity as it carries only the magnitude and does not have any direction.
The speed can be calculated from the ratio of the distance traveled by the object to the time taken to cover that distance.
The speed equation for an object can be written as follows:
Speed = distance /time taken
Distance = Speed × time
Given, the speed of the car = 20 m/s
The total time taken by car to travel the distance = 12 sec
The distance traveled by car = 20 × 12 = 240 m.
Therefore, the car will travel a distance of 240 meters in a given time.
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which technological advance has helped scientists to search for life in other star systems?
Answers
Answer:
Scientists are developing techniques to detect signatures from space in their search for alien life.
The Very Large Array (VLA) telescope, at the National Radio Astronomy Observatory (NARO) site in Socorro, New Mexico, will be used to constantly seek evidence of technosignatures.
Hope this helps
A car goes from rest to 25 m/s in 10 seconds. Determind the acceleration of the car.
Answers
Answer:
2.5m/s^2
Explanation:
a=velocity/time
a=25m/s/10s
a=2.5m/s^2
What is the acceleration of a car making a turn in a circle with a 100m radius traveling at
17m/s?
Answers
Answer:
2.89 m/s²
Explanation:
From the question given above, the following data were obtained:
Radius (r) = 100 m
Velocity (v) = 17 m/s
Acceleration (a) =.?
The acceleration of a circular motion is defined by:
a = v²/r
Where:
a is the acceleration.
v is the velocity.
r is the radius.
With the above formula, we can obtain the acceleration of the car as follow:
Radius (r) = 100 m
Velocity (v) = 17 m/s
Acceleration (a) =.?
a = v²/r
a = 17²/ 100
a = 289/100
a = 2.89 m/s²
Therefore, the acceleration of the car is 2.89 m/s²
Why is a skeptical attitude important in science?
A. It allows scientists to challenge inaccurate information.
B. It allows scientists to accept all information as true.
C. It ensures that scientists write short articles.
D. It highlights the good features of an experiment.
E. It provokes other scientists.
Answers
A. It allows scientists to challenge inaccurate information
Answer:
A: It allows scientists to challenge inaccurate information.
Explanation:
SOMEONE PLEASEEEE HELPP
Answers
Answer:
0.161
Explanation:
N = mg
= 8.2(9.81)
= 80.442 N
c. What did you notice with the acceleration values obtained by the different items? What do you think caused the variations in these values?
Answers
Explanation:
The given table gives the acceleration of an object for the different items at 50 N force.
Force acting on an object is given by :
[tex]F=ma[/tex]
As, [tex]a=\dfrac{v-u}{t}[/tex]
where u and v are initial and final velocities
It can be noticed that, as the mass of the object increases and final velocity decreases, the value of acceleration also decreases. It is maximum when the mass is least and the final velocity is most. As mass and velocity is changing, it will cause the change in variations of the value of a.
Variation in the values of acceleration occurs due to the different in the final velocity of different items.
The acceleration values obtained by the different items varies from one another because of different mass as well as final velocity. Acceleration depends on both mass of an object as well as velocity. We know that acceleration is the time rate of change of velocity.
So if the change occur in velocity we also experience change in the acceleration of that object so we can conclude that variation in the values of acceleration occurs due to the different in the final velocity of different items.
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1. What happens to particle spacing when temperature increase, What we call this process?
Answers
Answer:
Particle spacing increases and it's called evaporating
What is the maximum power load on a circuit with wiring rated to 20 amps having a voltage of E=12 Volts?
Answers
20 amps times 12 volts equals 240 watts
Example: 5 48 watt light bulbs hooked to a 12 volt battery. Batteries hooked in parallel will increase amp/hour capacity but voltage stays at 12 volts.
None of these are examples of projectile motion except: (Click all that
Apply)
A) Shooting a Basketball
B) Throwing a Baseball
C) Shooting a Cannon
D) Shooting a Gun
E) Writing a Pencil
F) Rolling a Bowling Ball
Answers
In a 350-m race, runner A starts from rest and accelerates at 1.6 m/s^2 for the first 30 m and then runs at constant speed. Runner B starts from rest and accelerates at 2.0 m/s^2 for the first 30 m and then runs at constant speed. Runner A befins running as soon as the race begins but B first takes a nap to rest up. What is the longest nap that B can take and still not lose the race?
Answers
Answer:
B can take 0.64 sec for the longest nap .
Explanation:
Given that,
Total distance = 350 m
Acceleration of A = 1.6 m/s²
Distance = 30 m
Acceleration of B = 2.0 m/s²
We need to calculate the time for A
Using equation of motion
[tex]s=ut+\dfrac{1}{2}at_{A}^2[/tex]
Put the value in the equation
[tex]30=0+\dfrac{1}{2}\times1.6\times t_{A}^2[/tex]
[tex]t_{A}=\sqrt{\dfrac{30\times2}{1.6}}[/tex]
[tex]t_{A}=6.12\ sec[/tex]
We need to calculate the time for B
Using equation of motion
[tex]s=ut+\dfrac{1}{2}at_{B}^2[/tex]
Put the value in the equation
[tex]30=0+\dfrac{1}{2}\times2.0\times t_{B}^2[/tex]
[tex]t_{B}=\sqrt{\dfrac{30\times2}{2.0}}[/tex]
[tex]t_{B}=5.48\ sec[/tex]
We need to calculate the time for longest nap
Using formula for difference of time
[tex]t'=t_{A}-t_{B}[/tex]
[tex]t'=6.12-5.48[/tex]
[tex]t'=0.64\ s[/tex]
Hence, B can take 0.64 sec for the longest nap .
can you tell Which body part does not help in the perception and production of sound in humans?
ears, lungs, mouth or vocal cords
which is not?
Answers
Lungs do not help in the perception and production of sound in humans.
What are lungs?Gaseous exchange occurs during inhalation and exhale during breathing. Main components of the human respiratory system include the nose, mouth, throat, larynx, trachea, bronchi, and lungs.
In humans and other vertebrates, the primary organs for respiration are the lungs. They are situated in the thoracic cavity of the chest, on either side of the heart. The lungs are spongy, anatomically speaking, with a total surface area that ranges from 50 to 75 square meters.
The lungs' main job is to make it easier for gases to move from the blood into the air. It's interesting to note that the right lung is significantly larger and heavier than the left.
Hence, lungs do not help in the perception and production of sound in humans.
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what is called gravity
Answers
Which of the statements about the nitrogen cycle is not true? Animals get nitrogen by eating plants or other animals Animals get nitrogen by eating plants or other animals Decomposers break down waste to yield ammonium Decomposers break down waste to yield ammonium Nitrogen moves back and forth between the atmosphere and living things Nitrogen moves back and forth between the atmosphere and living things All plants generate nitrogen in their roots
Answers
Answer:
decomposers break down waste to yield ammonia.
Explanation:
The nitrogen cycle is the process by which nitrogen circulates among the atmosphere, terrestrial, and marine ecosystems and is converted into multiple chemical forms through both biological and physical processes.
In the nitrogen cycle, decomposers do not break down waste to yield ammonia.
So, the option ''decomposers break down waste to yield ammonia'' is correct.
what magnetically happens when there is an electric current in a wire?
Answers
Answer:
you change the direction of the magnetic field.
Explanation:
Because the magnetic field created by the electric current in the wire is changing directions around the wire, it will repel both poles of the magnet by bending away from the wire.
A baby panda has a mass of 2.3 kg. What is the weight of the baby panda Newtons?
23 N
4 N
2.3 N
100 N
Answers
Answer:
23 N
Explanation:
A cyclist is traveling 10 m/s with an acceleration of 6 m/s2. How fast is the cyclist traveling at the end of 20 seconds
Answers
Answer:
The cyclist is traveling at 130 m/s
Explanation:
Constant Acceleration Motion
It's a type of motion in which the velocity of an object changes by an equal amount in every equal period of time.
Being a the constant acceleration, vo the initial speed, vf the final speed, and t the time, the following relation applies:
[tex]v_f=v_o+at[/tex]
The cyclist initially travels at 10 /s and it's accelerating at a=6m/s^2. We need to know the new speed when t= 20 seconds have passed.
Apply the above equation:
[tex]v_f=10+6\cdot 20[/tex]
[tex]v_f=10+120[/tex]
[tex]v_f=130\ m/s[/tex]
The cyclist is traveling at 130 m/s
The speed of
a bus rs 72km/hr. Convert it into
si system dimensionally
Answers
Answer:
Speed = 20 m/s
Explanation:
The speed of a bus is 72 km/h
The SI unit of speed is m/s
We need to convert it into m/s
We know that,
1 km = 1000 m
1 h = 3600 s
It means,
[tex]s=72\ \dfrac{km}{h}\\\\=\dfrac{72\times 1000\ m}{3600\ s}\\\\=20\ m/s[/tex]
So, the speed of the bus is 20 m/s.
PLEAS HURRY :) 10 POINTS + BRAINLIEST TO FIRST CORRECT ANSWER
How do the metal aluminum coils in an air conditioner help keep a house cool?
They insulate the house from outside thermal energy.
They conduct thermal energy from inside the house and release it outside the house.
They insulate the surrounding air from indoor thermal energy.
They conduct thermal energy from outside the house and release it inside the house.
Answers
Answer:
They conduct thermal energy from inside the house and release it outside the house. ... It reduces the amount of thermal energy that is transferred from outside to inside the container
Answer:
They conduct thermal energy from inside the house and release it outside the house
what are the bonds between carbon atoms in diamond?
Answers
A wire is placed within a magnetic field, and a current starts to flow through
the wire. Which statement about the magnetic field must be true?
O A. The field is produced by permanent magnets,
O B. The field is moving
C. The field is produced by induced magnetism.
OD. The field is not moving
PLEASE PLEASE HELP QUICK
Answers
Answer:
B. The field is moving
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When Object 1 came into contact with Object 2, Object 2 got warmer. What can be concluded about the objects before they came into contact with each other?
Object 2 did not have thermal energy.
Object 1 had faster-moving particles.
Object 1 had less thermal energy.
Object 2 had fewer particles.
Answers
Answer:
object 1 had faster-moving particles.
Before the two objects came into contact with each other, object 1 had faster-moving particles.
What is thermal energy?
The thermal energy of an object is the energy possessed by the object due to temperature difference.
The thermal energy of an object increases with increase in kinetic energy of the object. The kinetic energy of the object increases with increase in speed of the object.
Thus, we can conclude that before the two objects came into contact with each other, object 1 had faster-moving particles.
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