The transformer secondary turns should be 83 turns.
We need to know about the transformer to solve this problem. Transformer is a device that can increase or reduce the voltage. The changed voltage depends on the current and number of coil turns. It can be written as
Vi / Vs = Ni / Ns = Is / Ii
where Vi is input voltage, Vs is output voltage, Ni is primary turn, Ns is secondary turn, Is i output current and Ii is input current.
From the question above, we know that
Vi = 120 V
Ni = 1000 turns
Vs = 10V
By substituting the following parameters, we can calculate the secondary turns
Vi / Vs = Ni / Ns
120 / 10 = 1000 / Ns
Ns = 1000 / 12
Ns = 83 turns
Hence, the transformer secondary turns should be 83 turns.
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Hannah is driving a car up a hill. She observes that the car tends to slow down if she does not press down on the accelerator. Hannah suggests that friction between the car and the road is causing the car to slow down. Which best explains why Hannah’s suggestion is not a scientific theory?
Group of answer choices
Hannah’s suggestion is not a well-supported and widely accepted explanation
Hannah is not a well-paid scientist
Hannah’s suggestion is a claim that has been well tested.
Hannah’s suggestion is a good idea held by an individual and based on a life experience.
Answer:
C. is correct.
Explanation:
Hope this helps :)
The suggestion given by Hannah is not a well-supported and widely accepted explanation. So, option A is correct.
What is friction?Friction is a force that prevents two solid objects from rolling or sliding over one another. Although frictional forces, such as the traction required to walk without slipping, may be advantageous, they can provide a significant amount of resistance to motion. Automobile engines use about 20% of their output to overcome frictional forces in moving parts.
The adhesion forces between the contact zones of the surfaces, which are always microscopically uneven, appear to be the primary cause of friction between metals. Shearing these "welded" joints and the action of the tougher surface's imperfections scrubbing against the softer surface cause friction.
According to the question, Hannah is driving the car up a hill and when she is not pressing the accelerator the car slows down. The reason behind this is that there is an ascent of height that the car has to climb with its engine power and if the accelerator is not applied to it then it will start to slow down also friction is a factor that is involved in this case.
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Julia tosses a water balloon straight up at time t = 0.
Which of the following graphs best shows the velocity of the water balloon after it is tossed?
Assume upward is the positive direction.
Assume upward is the positive direction. Julia tosses a water balloon straight up at time t = 0.The option D of the following graphs best shows the velocity of the ball after it is thrown.
What is velocity?Velocity is a term defines that a particles covered distance upward positively and downward negatively in a constant time. It is a vector quantity.
How can we calculate the velocity?According to the question, assuming upward is the positive direction. Julia tosses a water balloon straight up so there is a initial velocity in the balloon.
So the curve starts from the positive vertical axis of v-t curve.
we are using the formula; v=u+at
Now we know from discussion, there is a positive initial velocity. But There is a acting of acceleration due to gravity. That acceleration acting the on ball from the beginning. So after some time the velocity of the ball become zero and then it start to moving downwards.
Then the formula becomes,
v=u+(-a)t
Or, v=u-at
So, from the above discussion we can say that the nature of graph (d) is similar to our discussion. The option D of the following graphs best shows the velocity of the ball after it is thrown.
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Hi , good evening I need help in this question please!
Answer:
D. Objects in which the number of negative charges equal to the positive.
Explanation:
Neutrons have no charges.
I am 100% sure.
which two phenomena make up electromagnetism
Answer:
Electricity and Magnetism
a. If 1gcm²S-¹ = x Js. Find the value of x.
1gcmS−1 =xNS
=x.kg.mS ∧−2 .s
Now, we know that
1 g=10 ∧−3
kg and 1 cm=10 ∧−2m
Therefore, it can be written as:
10 ∧−3 kg.10 ∧−2m=x.kg.m
⇒ x=10 ∧−5
The system that controls such body processes as hormone balance, temperature, and width of blood vessels is called the:_________
The system that controls such body processes as hormone balance, temperature and width of blood vessels is called the endocrine system.
In coordination with the nervous system, the endocrine system controls and maintains balance in the organ system. It does this by secreting hormones. The nervous system sends a signal to the endocrine system which secretes hormones to coordinate different processes in the body.
Hormones are chemical substances that circulate round the body and bind to a target cell, where they elicit a response. Special organs called endocrine glands secrete these hormones directly into the blood stream. For example, the pancreas secretes a hormone called insulin, and another one called glucagon. These two hormones work together to control the glucose levels in the blood.
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Kam is pushing a cart using 5 N. Jayln is helping him push using 8N. What is the Net Force?
The correct answer 13 N.
Force causes an object to come to rest when it accelerates and causes a body to accelerate when it is at rest. Force is therefore the result of mass times acceleration. The overall force applied on a body is known as the net force. The total of all forces exerted on an object is known as the net force. There are two different types of forces: balanced forces and imbalanced forces. The term "balanced force" refers to an object that is balanced on both of its sides. Unbalanced force is defined as the movement of an item caused by an excessive force applied to one side.
Force exerted by Kam = 5N
Force exerted by Jaylan = 8N
Thus the net force = 5N + 8N
= 13 N
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Which involves the emission of less energy in the h atom, an electron moving from n = 4 to n = 2 or an electron moving from 3 to n = 2?
By transition energy, the emission of less energy in the h atom is an electron moving from n = 4 to n = 2.
We need to know about transition energy to solve this problem. Electrons in a hydrogen atom can move to another level of energy. It is also called a transition. In this process, electrons will absorb or release their energy to move. The transition energy can be determined as
ΔE = E2 - E1
where ΔE is transition energy, E2 is the final state of energy and E1 is the initial state of energy.
The state energy of a hydrogen atom can be calculated by
E = -(13.6) / n² eV
E = h.c / λ
where n is the number of energy states, h is Planck constant (4.136 x 10¯¹⁵ eV/Hz), c is speed of light (3 x 10⁸ m/s) and λ is wavelength.
From the question above, we know that
ΔE1 from n =4 to n = 2
ΔE1 from n =3 to n = 2
From the equation, we know that the transition energy is depends on the level state where
ΔE ~ (1/n2² - 1/n1²)
Hence
ΔE1 / ΔE2 = (1/n2² - 1/n1²) / (1/n2² - 1/n1²)
ΔE1 / ΔE2 = (1/2² - 1/4²) / (1/2² - 1/3²)
ΔE1 / ΔE2 = (3/16) / (5/36)
ΔE1 / ΔE2 = (3/16) / (5/36)
ΔE1 / ΔE2 = 1.35
ΔE1 = 1.35 ΔE2
Hence, the emission of less energy in the h atom is an electron moving from n = 4 to n = 2.
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When earth catches up to a slower-moving outer planet and passes it in its orbit, in the same way that a faster runner overtakes a slower runner in an outside lane, the outer planet.
When earth catches up to a slower-moving outer planet and passes it in its orbit, in the same way that a faster runner overtakes a slower runner in an outside lane, the outer planet exhibits a retrograde motion
When a planet is far from another planet and observed from it, it rotates at a slower rate, making it appear that it is "retrograding" with regard to the other planet.
Early astronomers were perplexed when they observed motion in the sky because they attempted to explain it in terms of the geocentric idea.
Due to their commitment to the geocentrical paradigm, which stated the Earth was the center of the solar system, early astronomers were perplexed and unable to explain the phenomena.
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A box has a mass 45kg is pushed to the right with a force of 270 newtons. What will the acceleration be? ( Please help)
Answer:
6m.s‐²
Explanation:
IF there is no friction or any other force acting on the objects then use the equation Fnet=m.a
Fnet=m.a
270=45(a)
a=6
results will change if there is another force acting on the box besides the pushing force
please give brainliest
Marcie is trying a new cookie recipe. She wants to see if the amount of baking powder she uses will make the cookies rise more. She makes three batches of cookies and changes the amount of baking powder for each batch. What are two things that must remain constant for this experiment?
The temperature of the oven and the other ingredients that are added are the two things that will remain constant for this Experiment.
What are constant in an experiment?A constant is an unchanging amount. A constant can be measured, but it cannot be changed during an experiment or you choose not to modify it.Compare this to an experimental variable, which is a component of an experiment that the experiment itself affects.We must include constants in our experiments for a number of reasons. However, they all derive from the same trait, which is consistency or replication of outcomes.Every time we conduct an experiment, we take great care to ensure that the procedure can be repeated as often as necessary.We would also get a lot of varying results if we used a lot of different variables. The goal of experimentation would be wholly defeated in this case.To learn more about Experiments visit:
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A kangaroo jumps to a vertical height of 2.8 m. How long will it be in the air before returning to Earth?
The total time spent by the kangaroo in the air before returning to the earth is kangaroo
Data obtained from the questionFrom the question given above, the following data were obatined:
Height (h) = 2.8 mAcceleration due to gravity (g) = 9.8 m/s²Total time (t) =? How to determine the time to reach a height of 2.8 mWe'll begin by obtainig the time to reach the height of 2.8 m. This is illustrated below:
h = ½gt²
2.8 = ½ × 9.8 × t²
2.8 = 4.9 × t²
Divide both side by 4.9
t² = 2.8 / 4.9
Take the square root of both side
t = √(2.8 / 4.9)
t = 0.76 s
How to determine the time for the entire trip Time to reach maximum height (t) = 0.76 sTime for the entire trip (T) =?T = 2t
T = 2 × 0.76
T = 1.52 s
Thus, the kangaroo will spend 1.52 s in the air.
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To be effective, why must agreement aimed at preventing or reducing ozone depletion be international?
I have to get it done.. it's pass due
To be effective, there must be must agreement aimed at preventing or reducing ozone depletion by the international government and the various international organizations.
What is pollution?
It can be defined as the origination of the contaminant substance that poisonous or harmful to our natural environment.
The Montreal Protocol is an international agreement that was established to safeguard the earth's atmosphere by gradually banning the manufacturing and use of chemicals that damage the ozone layer (ODS).
Thus, For an agreement between the different international organizations and the international government to be effective, it must be targeted at avoiding or mitigating ozone depletion.
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A delivery truck travels 18 blocks north, 10 blocks east, and 16 blocks south. What is the distance traveled and displacement? Assume all blocks are the same length.
1) Length: 44 blocks
2) Relocation: 10.2 blocks to the north of the east
Since each segment travelled a certain amount of distance, the total distance is:
distance equals 18 + 10 + 16 blocks.
How does displacement change with distance travelled?The total distance travelled is larger than the displacement between those two places if an item changes direction while travelling.
The displacement is only the difference between the locations of the two markers and is unrelated to the route used to get there. The entire length of the path between the two markings, however, is the distance travelled.
The distance is always greater than the object's displacement and can never be 0 or negative.
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what is stopping potential.
An electron starts from rest 24.5 cm from a fixed point charge with how fast will the electron be moving when it is very far away?
Consequently, an electron's speed at a very great distance is: 1.047 x 10 ^7 m/s
What is Electric Potential Energy?
The amount of work required to move one charge from infinity to a location close to the other charge is known as the electric potential energy of a system of two charged particles. When two charges exist in a system and are separated by an infinite distance, their electric potential energy is zero. The following mathematical formula can be used to express the electric potential energy of a system of two charged particles:
U =k⋅q1⋅q2/r
Where:
k is the coulomb's constant.
q1 is one of the charges.
q2 is the second charge.
initial speed of electron u = 0 m/s
mass of an electron is m= 9.11×10^−31 kg
Let v be the final velocity of the electron
When the electron is quite distant from the fixed charge, we are asked to determine its final speed. The system is being held together by a conservative force (electron and fixed charge) (electric force). As a result, we can apply the principle of mechanical energy conservation by equating the system's beginning mechanical energy (represented by the electron and constant charge) to the system's ultimate mechanical energy as follows:
MEi = MEf
KEi + PEi = KEf + PEf
Putting the values we get,
v= 1.047 x 10 ^7 m/s
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A battled baseball is hit with a speed of 45 m/s starting from an initial height of 1 m. find how high the ball travels in two cases.
When a ball is hit at an angle to the horizontal, the ball has two motions going for it concurrently: the first and simpler one is the constant-speed horizontal motion; the other is the vertical constant-acceleration motion. To investigate the motion of the ball, we use kinematic equations based on Newton's laws.
A concrete section of a bridge has a length of 10.0 m at 10.0 °C. By how much will the length of the section increase if its temperature increases to 40.0 °C?
Answer:
20
Explanation:
this this is because the temperature setting please the brains concentrate section increases
A 10-kg rock and a 20-kg rock are dropped at the same time and experience no significant air resistance. If the 10-kg rock falls with acceleration a, what is the acceleration of the 20-kg rock?.
When a 10-kg rock and a 20-kg rock are dropped at the same time and experience no significant air resistance the acceleration of both rocks is: the same and equal to the gravity
When an object is dropped (in the absence of air resistance) it has a positive acceleration equal to the gravity.
Therefore, no matter in which instant of the movement both rocks are, their acceleration will always be equal to the acceleration of gravity 32.17 ft/s², and after finishing their movements the acceleration will be equal to zero (0) because they will reach the ground and will be at rest.
What is gravity?In physics, gravity is the force of attraction that the earth exerts on all bodies possessing mass by pulling them toward its center.
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For horizontally-launched projectiles, which of the following describes acceleration in both directions with a⃗ x=0 and a⃗ y=−9.8 m/s2.
A. Acceleration is −9.8 m/s2
in both directions.
B. Acceleration is constant in both directions.
C. Acceleration is equal in both directions.
D. Acceleration is zero in both directions.
The motion of projectiles shows that acceleration is constant in both directions; option B.
What is projectile motion?Projectile motion refers to the motion of projectiles in a curved path or parabola under the influence of gravity.
Projectiles are objects which are launched into the air and allowed to fall freely under the effect of the gravitational force of the earth.
For a horizontally-launched projectile with acceleration in the x-axis or x-direction equal to zero and acceleration u=in the y-axis equal to -9.8 m/s², the object is moving with a constant acceleration in both directions.
In conclusion, the motion of objects which are being launched into the air and allowed to fall freely under the effect of the gravitational force of the earth is known as projectile motion. Projectiles move with constant acceleration in both the x and y directions.
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With what speed must a ball be thrown vertically from ground level to rise to a maximum height of 33 m? (b) how long will it be in the air?
By using uniform motion, with an initial speed 25.43 m/s and 2.60 seconds the ball will rise maximum height.
We need to know about the uniform motion to solve this problem. The uniform motion is an object's motion under acceleration. It should follow the rule
vt = vo + a . t
vt² = vo² + 2a . s
s = vo . t + 1/2 . a . t²
where vt is final velocity, vo is initial velocity, a is acceleration, t is time and s is displacement.
From the question above, we know that
h = 33m
vt = 0 m/s
g = 9.8 m/s²
The gravitational acceleration will be negative, hence
vt² = vo² - 2g . h
0² = vo² - 2. 9.8 . 33
vo² = 646.8
vo = √646.8
vo = 25.43 m/s
Use the first equation to get the time taken
vt = vo - g . t
0 = 25.43 - 9.8t
9.8t = 25.43
t = 2.60 second
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If electric field lines point radially toward a charge, that charge must be ________.
Answer: Negative
Explanation: If electric field lines point radially toward a charge, that charge must be Negative
Light with a frequency of 7. 30 x 1014 hz lies in the violet region of the visible spectrum. What is the wavelength of this frequency of light? please answer in nm and round to the nearest whole number.
Light with a frequency of 7.30 x 10¹⁴ that lies in the violet region of the visible spectrum has a wavelength of 412nm.
In the question, we are given the frequency of light as 7.30 x 10¹⁴hz. The formular that connects frequency and wavelength is:
λ = v/f
Where:
v is the velocity of light, which is 3 x 10⁸m/s,λ (lambda) is the wavelength, andf represents frequency.If we put in the values of f and v into the formular:
λ = 3x10⁸ ÷ 7.30x10¹⁴
λ = 4.12x10⁻⁷m
The answer is in meters because the velocity of light is measured in meters per second. To convert it to nanometers, we will multiply the answer by 10⁹, hence:
λ = 4.12x10⁻⁷ x 10⁹
λ = 4.12x10² = 412nm
What is wavelength?The wavelength of a wave is the distance between two successive troughs or crests. When we say that the wavelength of a spectrum of light is 412nm, it means that the distance between two successive crests for that spectrum of light is 412nm.
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Silver wire has a resistance of 1.25 ohms at 0 c. at what temperature is the resistance 2 ohms?
At 65.7K temperature is the resistance 2 ohms.
A conductor's resistance is influenced by its temperature, and a conductor's initial resistance and temperature change are directly inversely correlated. It has been noted that a conductor's resistance increases as temperature rises.
i.e., ΔR ∝ R₀ΔT
R is the temperature coefficient of resistance and T is the temperature.
⇒ R - R₀ =R₀αΔT
⇒ R = R₀(1 + αΔT)
R0 = starting resistance in this case = 1.25
0.00375°C is the temperature coefficient.
2 = 1.25[1 + 0.00375(0-[tex]T_{f}[/tex])]
2 = 1.25 + 1.25× 0.00375(0-[tex]T_{f}[/tex])
0.75 = 0.0046875(0-[tex]T_{f}[/tex])
65.7K = [tex]T_{f}[/tex]
Therefore, at 65.7K temperature is the resistance 2 ohms.
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How does a Pharmacist use science
Answer:
Pharmaceutics
Explanation:
Pharmaceutics are medicinal chemistry , and pharmacology became established and as the foundation sciences .
The center of the thin disk is displaced 15 mm and then released. What is the maximum velocity attained by the center of the disk assuming no slip between the disk and the surface?
The maximum velocity is v= √10gh/7
The energy that an object has due to its location in a gravitational field is known as gravitational potential energy. When an object is close to the surface of the Earth, when the gravitational acceleration can be assumed to remain constant at roughly 9.8 m/s2, gravitational potential energy is most frequently used.
For the situation of the maximum velocity of the sphere when it hits the ground, the loss in gravitational potential energy is equal to the gain in translational kinetic energy and rotational kinetic energy.
mgh = mv² x I / 2.
mgh = 0.5 mv² + 0.5 (2/5 mR²)
The no-slip condition results in:
v=Rω
mgh = 0.5 mv + 0.2 mv
⟹v= √10gh/7
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Two men walk away from each other in opposite directions. both travel 3.5 m each second. what is the difference between the speeds and between their velocities?
There is no difference between the speeds of two men walk away from each other in opposite directions travelling at 3.5 m each second.
There is no difference between the speed and the velocity of the two men given the information provided. The information provided gave a velocity of 3.5m/s however the speed of the journey was not supplied from the question. Also, the total time travelled, the total distance travelled was not provided from the question hence, it is impossible to calculate the speed and velocity to determine with certainty the speed of the journey. The question only provided a 3.5 m per second velocity for the journey taken by both men. It would have been possible to calculate their differences with information on total distance covered or total time taken.
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Help with explaining please
A bottle with a volume of 187 u. s. fluid gallons is filled at the rate of 1.7 g/min. (water has a density of 1000 kg/m3, and 1 u.s. fluid gallon = 231 in.3.) how long does the filling take?
To fill the volume of 187 u. s. fluid gallons at a rate of 1.7 g/min will take: 416215.8 min
To solve this problem the we have to do the conversion of units with the given information and the following formulas:
t = x/vd = m/vWhere:
x = distancet = timev = velocityv= volumed= densitym= massInformation about the problem:
x ( volume capacity) = 187 u. s. fluid gallonsv(fill rate) = 1.7 g/mind = 1000 kg/m³1 u.s. fluid gallon = 231 in³t = ?By converting the density unit from (kg/m³) to (g/in³)and then to (g/u.s. fluid gallon) we have:
d = 1000 kg/m³ * 1000 g/ 1 kg * 1 m³/61020 in³
d =16.380 g/in³ * 231 in³ /1 u.s. fluid gallon
d = 3783.78 g/u.s. fluid gallon
Applying the density formula and clearing the mass (m), we get:
m = d * v
m = 3783.78 g/u.s. fluid gallon * 187 u. s. fluid gallons
m = 707566.86 g
Applying the time formula we have that:
t = x/v
t = 707566.86 g / 1.7 g/min
t = 416215.8 min
What is unit conversion?It is the transformation of a value expressed in one unit of measurement into an equivalent value expressed in another unit of measurement of the same nature.
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If a fisherman applies a horizontal force with magnitude 51.5 n to the box and produces an acceleration of magnitude 3.00 m/s2, what is the mass of the box?
The mass of the box which the fisherman applies a horizontal force is 17.16 Kg
To solve this exercise, the formula and procedure to be applied are:
F = m * a
Where:
m = massF = Forcea = accelerationInformation about the problem:
a= 3.00 m/s2F= 51.5 N1 N = kg * m/s²m = ?Applying the force formula and isolating the mass, we get:
F = m * a
m = F/a
m = 51.5 Kg * m/s² / 3.00 m/s2
m = 17.16 Kg
What is force?It is the physical magnitude that expresses the effort necessary to move the mass of one kilogram with an acceleration of one meter per second squared, this is expressed in units of the international system in Newton.
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