5 of 225 of 22 Items
12:41
Question
The basic concept of how a simple motor works is explained by which statement?
Answers
Answer:
The basic concept of how a simple motor works is that you put electricity into it at one end and an axle (metal rod) rotates at the other end giving you the power to drive a machine of some kind. The simple motors you see explained in science books are based on a piece of wire bent into a rectangular loop, which is suspended between the poles of a magnet. In order for a motor to run on AC, it requires two winding magnets that don’t touch. They move the motor through a phenomenon known as induction.
I hope this helps! Let me know if I'm wrong!
Explanation:
Related Questions
Help please (20 pts) I think it's C
What does "think of concrete examples" mean?
A. It means you come up with as many examples as you can in five minutes.
B. It means your thinking is getting too stiff, like concrete.
C. It means you think about how you can imagine the problem as a concrete block.
D. It means think of a real-life example you can relate to that has to do with what you’re learning.
Answers
Answer:
I'm not sure it is c I'm sure it is d
Assume an AC circuit with parallel RLC elements operating in a steady state. If each
branch is carrying 10 A then find out total current? If the voltage source is 230 V and 50
Hz then find values of R, L and C.
Answers
To find the total current in the AC circuit with parallel RLC elements, we need to calculate the impedance of each branch and then apply the rules for combining parallel impedances.
The impedance of each branch in a parallel RLC circuit can be calculated as follows:
1. For the resistor (R): The impedance (Z_R) of a resistor in an AC circuit is equal to its resistance (R). Therefore, Z_R = R.
2. For the inductor (L): The impedance (Z_L) of an inductor in an AC circuit is given by Z_L = jωL, where j is the imaginary unit, ω is the angular frequency (2πf), and L is the inductance.
3. For the capacitor (C): The impedance (Z_C) of a capacitor in an AC circuit is given by Z_C = 1/(jωC), where C is the capacitance.
The total current (I_total) can be calculated by summing the currents in each branch: I_total = I + I + I (three branches in parallel)
Now, By performing the necessary calculations using the given values, we can determine the specific values of R, L, and C for the parallel RLC circuit.
Learn more about impedance here:
https://brainly.com/question/31369031
#SPJ11
You get yourself a new mirror so that you can admire yourself in the morning. When you open the box, you notice that it is only ½ your height. You think to yourself "This is no good! Now I can't see all of me!" You put it up anyway and realize that you can see your entire body in it. How can this be?
Answers
Answer:
Because you stand at a distance from the mirror at which your entire body shows.
Explanation:
Since the mirror is a plain mirror, the distance of the object from the mirror is also the distance of the image from the mirror. Also since the magnification is 1 for a plane mirror because the height of the image equals the height of the object. Since the magnification always equals 1, for you to be able to see your entire body, you must stand at a distance from the mirror such that your height equals the image height.
Answer: By keeping a distance away from the mirror.
Explanation:
If it's a plane mirror, it's possible to see your entire body by keeping distance away from the mirror. The distance of the object away from the mirror is equal to the distance of the image away from the mirror.
hen you sit in your desk chair, the reaction force to your weight is the normal force from the chair. True False Suppose that a book is sliding against a rough table. A constant force is needed to maintain its velocity. True False
Answers
When you sit in your desk chair, the reaction force to your weight is the normal force from the chair, which is a true statement. Suppose that a book is sliding against a rough table, then a constant force is needed to maintain its velocity, which is also a true statement.
The normal force is an example of the contact force, which is the force that arises when two objects are in physical contact with each other. It acts perpendicular to the surface of contact and opposes the force of gravity.The force of friction acts against the relative motion of the surfaces in contact, and the net force is the difference between the two opposing forces.
When a book is sliding on a rough table, a force is needed to balance the force of friction acting on it so that its velocity can be maintained at a constant level. The book's velocity decreases over time if the force applied is less than the force of friction on the book. If the force applied is greater than the force of friction on the book, its velocity increases over time. Therefore, a constant force is needed to maintain its velocity
.According to Newton's laws of motion, a body remains at rest or in uniform motion in a straight line unless acted upon by an external force. A constant force is required to maintain uniform motion in the absence of any external force acting on the body.
Learn more about velocity -
brainly.com/question/80295
#SPJ11
A man of mass 50kg ascends a flight of stairs 5m high in 5 seconds.If acceleration due to gravity is 10m/s the power expended is
Answers
Answer:
490 W
Explanation:
F = ma = (50 kg)(9.8 m/s²) = 490 N (Weight = W = mg)
Work = W = Fd = (490 N)(5 m) = 2450 J
Power = W/t = 2450 J / 5 s = 490 J/s = 490 W (watts)
How much energy is needed to melt 5 g of ice? The specific latent heat of melting for water is 334000 J/k
Answers
Answer:
The amount of energy needed to melt the ice is 1670 J
hope it helpss!!!
The Jamaican bobsled team hit the brakes on their sled so that it decelerates at
a
uniform rate of 0.43 m/s?. How long does it take to stop if it travels 85 m before
coming to rest?
Answers
the answer is in the photo
hopes it help!
if the angle the mop handle makes with the horizontal is increased to 65 ∘ , does the work done by the janitor increase, decrease, or stay the same?
Answers
If the angle the mop handle makes with the horizontal is increased to 65°, the work done by the janitor will stay the same.
1. The work done by the janitor in cleaning the floor depends on the force applied and the distance over which the force is applied. It is given by the equation: Work = Force × Distance × cos(θ), where θ is the angle between the force and the direction of motion.
2. When the angle the mop handle makes with the horizontal is increased to 65°, the angle between the force applied by the janitor and the direction of motion also increases. However, the cosine of 65° is less than the cosine of 0° (horizontal).
3. Since the cosine of 65° is smaller than the cosine of 0°, the work done by the janitor will remain the same or decrease slightly. This is because the component of the force in the direction of motion decreases as the angle increases.
In summary, when the angle the mop handle makes with the horizontal is increased to 65°, the work done by the janitor will stay the same or decrease slightly.
To more about work done visit:
https://brainly.com/question/2750803
#SPJ11
what is the weight of a 15 kg object
Answers
to get weight multiply Mass by 9.8
weight =9.8x15=147N
if the temperature is constant and the pressure increases, then the volume will ____.
Answers
PLEASE HELP URGENT: Please see attachment for problem! AP physics projectile question. I'd REALLY appreciate any help.
Answers
Which is a good description of the electric force between stationary charged objects?
Answers
The strength of the electric force depends on the amount of charge on each object and the distance between them. Electric force, also known as Coulombic force, is a fundamental force of nature that is responsible for the interaction between charged particles. It is a long-range force that can be either attractive or repulsive depending on the charges of the particles involved.
The electric force between stationary charged objects is a force that arises due to the presence of an electric charge. When two or more stationary charged objects are in close proximity to one another, the electric force between them will cause them to attract or repel one another depending on their charges. Like charges repel each other, while opposite charges attract each other. The electric force between two stationary charged objects can be calculated using Coulomb's Law. According to Coulomb's Law, the magnitude of the electric force between two point charges is directly proportional to the product of their charges and inversely proportional to the square of the distance between them. Mathematically, the formula for Coulomb's Law is given as F = k * q1 * q2 / r^2, where F is the force, k is Coulomb's constant, q1 and q2 are the magnitudes of the charges, and r is the distance between the charges.
to know more about Coulomb's Law visit:
https://brainly.com/question/506926
#SPJ11
Physics assignment <3 [100 points]
![Physics assignment <3 [100 points]](https://i5t5.c14.e2-1.dev/h-images-qa/contents/attachments/YWDZhXWgd2Q6gQ7TmhEDa6fl0e6nRqsm.jpeg)
Answers
Case B: All of the forces that have been applied on this object are in balance because they all cancel each other out. In conclusion it means that the object is not moving.
Case C: The forces that have been applied to this object are unbalanced. Therefore the object will move to the right because it has a force of 2N
1 point
The Sun is a massive star at the center of our Solar System. The planets
closest to the Sun are terrestrial planets, and those farther away are gas
giants. Which force maintains this arrangement of the Solar System? *
Electromagnetism
Friction
Gravity
Torsion
Answers
Answer:
Gravity
Explanation:
It is gravity because the sun's gravity pulls all the planets towards itself and keeps the planets in the sun's orbit
Michael decides to do an experiment to determine which type of sock
absorbs the most sweat. Which of these describes him doing step one of the
inquiry process?
A. Michael measures the weights of six different kinds of socks
before and after he goes running,
B. Michael finds that all-polyester socks weigh 0.05 ounce more after
he runs in them.
C. Michael predicts that all-cotton socks will absorb the most sweat,
because he thinks cotton is very absorbent.
O D. Michael asks himself which of the many types of socks in his
drawer looks like it can absorb sweat most effectively.
Answers
in an observational study researchers try not too ?
Answers
They try not to influence the subjects
Explanation:
A car is traveling at a velocity of 22 m/s when the driver puts on the brakes
to decelerate it at 1.4 m/s? over a distance of 110 m. What is the car's
velocity at the end of this distance?
Answers
Answer:
v = v +at = 22 + (1.6 6.8 s ms) = 33 ms
Explanation:
A car of mass m1 traveling north at a speed of v1 collides with a car of mass m2
traveling east at a speed of v2. They lock together after the collision.
> Part A: Determine expression for the distance the cars will move until they stop if the coefficient of kinetic friction μk between the cars' tires and the road is about the same for both cars. (Express your answer in terms of the variables m1, m2, v1, v2, μk and appropriate constants.)
> Part B: Determine expression for the direction of the cars' movement after the collision. Zero angle direction is due east. (Express your answer in terms of the variables m1, m2, v1 , v2)
Answers
Answer:
Explanation: Part A:
The initial momentum of the two-car system is:
p = m1v1 + m2v2
After the collision, the two cars will be stuck together and move as one. The final momentum of the system is:
p' = (m1 + m2) v'
where v' is the final velocity of the two-car system. Since momentum is conserved, we have:
p = p'
Therefore,
m1v1 + m2v2 = (m1 + m2) v'
The force of friction opposing the motion of the car is:
Ff = μk N
where N is the normal force, which is equal to the weight of the cars:
N = (m1 + m2) g
The force of friction causes the two-car system to decelerate until it comes to a stop. The deceleration is given by:
a = Ff / (m1 + m2)
Substituting the expression for Ff, we get:
a = μk g
The distance the cars will move until they stop is given by:
d = v'² / (2a)
Substituting the expression for v' and a, we get:
d = (m1v1 + m2v2)² / (2μk g (m1 + m2)²)
Therefore, the expression for the distance the cars will move until they stop is:
d = (m1v1 + m2v2)² / (2μk g (m1 + m2)²)
Part B:
Since the two cars lock together and move as one after the collision, the direction of their movement will be determined by the vector sum of their initial velocities. To find the direction of the cars' movement after the collision, we can use the law of conservation of momentum in the x and y directions separately.
In the x-direction, the initial momentum is:
p_x = m1v1 + m2v2
After the collision, the two cars will move in the x-direction only, so the final momentum in the x-direction is:
p'_x = (m1 + m2) v'_x
where v'_x is the final velocity in the x-direction.
Since momentum is conserved in the x-direction, we have:
p_x = p'_x
Substituting the expressions for p_x and p'_x, we get:
m1v1 + m2v2 = (m1 + m2) v'_x
Therefore,
v'_x = (m1v1 + m2v2) / (m1 + m2)
In the y-direction, the initial momentum is:
p_y = 0 + 0 = 0
After the collision, the two cars will move in the y-direction only, so the final momentum in the y-direction is:
p'_y = (m1 + m2) v'_y
where v'_y is the final velocity in the y-direction.
Since momentum is conserved in the y-direction, we have:
p_y = p'_y
Substituting the expressions for p_y and p'_y, we get:
0 = (m1 + m2) v'_y
Therefore,
v'_y = 0
This means that the two cars will move in the x-direction only, and the direction of their movement after the collision is given by:
θ = tan⁻¹(v2/v1)
A balloon is partially inflated and sealed. A number of weights are attached to the balloon such that it is neutrally buoyant when submerged at a certain depth in a beaker of water. Describe the motion of the balloon, if you push the balloon down to a greater depth and release it. Explain.
Answers
This motion of the balloon is an example of buoyancy, which is the upward force exerted by a fluid on an object immersed in it.
Example of buoyancy motionWhen the balloon is neutrally buoyant, it means that the weight of the balloon and the weights attached to it is equal to the weight of the water displaced by the balloon.
If you push the balloon down to a greater depth and then release it, the balloon will rise back up to its original position.
This is because the balloon is still partially inflated and contains air, which is less dense than water. When you push the balloon down, the water pressure compresses the air in the balloon, causing it to become smaller in size.
When you release the balloon, the compressed air expands and pushes the balloon upwards towards the surface of the water.
Learn more about The buoyancy at
https://brainly.com/question/19168433
#SPJ11
As a light wave strikes a shiny surface like a piece of polished metal, it will be
refracted
reflected
absorbed
Please help!!!!!
Answers
3. Use deductive reasoning to prove the following statements.
a) The sum of any three consecutive even numbers is divisible by six.
Let in the first even number
2n+2: the second even number
2n +4: the third
even number
b) The sum of any three odd numbers is an odd number.
Let 2rn -1 = the first odd number
Let 2m- 1 = the second odd number
Let 2p-1 = the third odd number
c) a product of any two odd numbers is an odd number.
d) the difference of the sequence of two consecutive even numbers is divisible by four
Answers
Answer:
the question is so big and it
chapter 1que 32The density of lead is 11.4 g/cm3 at 25°C. Calculate the volume occupied by 25.0 g oflead.A) 2.19 cm3 B) 0.456 cm3 C) 285 cm3 D) 1.24 cm3 E) 6.05 cm3
Answers
The density of lead is 11.4 g/cm3 at 25°C and the volume occupied by 25.0 g of lead is 2.19 cm3. Hence, option A is the correct option.
The formula to calculate the volume (V) of a substance is:
V = m / ρ
Here, m is the mass of the substance and ρ is its density so in this case, we have:
m = 25.0 g
ρ = 11.4 g/cm3
Putting these values into the formula:
V = 25.0 g / 11.4 g/cm3
V = 2.19 cm3
Therefore, the volume occupied by 25.0 g of lead is 2.19 cm3.
To know more about density refer,
https://brainly.com/question/29775886
#SPJ4
Car A starts from rest at t =0 and travels along a
straight road with a constant acceleration of 2 ft/s^2 of until it
reaches a speed of 74 ft/s^2 . Afterwards it maintains this
speed. Also, when t = 0 , car B located 5760 ft down the
road is traveling towards A at a constant speed of 56 ft/s^2 .
Determine the distance traveled by car A when they pass
each other.
Answers
The distance traveled by car A when they pass each other is 3278.2 ft.
What is the time taken for the two cars to meet each other?The time taken for the two cars to meet each other is calculated by applying the concept of relative velocity.
(Va + Vb)t = d
where;
Va is the velocity of car AVb is the velocity of car Bt is the time of motion of the two carsd is the distance between the cars(74 + 56)t = 5760
130t = 5760
t = 5760/130
t = 44.3 s
The distance traveled by car A when they pass each other is calculated as follows;
da = 74 ft/s x 44.3 s
da = 3,278.2 ft
Learn more about relative velocity here: https://brainly.com/question/17228388
#SPJ1
When electrons are lost, a ( )
ion is formed.
When electrons are
gained, a ( )
ion is formed.
Answers
When electrons are lost a positive ion is formed. When electrons are gained, a negative ion is formed. I hope this helps
Two 0.967 kg masses are 4.439 m apart on a frictionless table. Each has 16.074 microCoulombs of charge. What is the initial acceleration of each mass if they are released and allowed to move?
Answers
Firstly, we can write the equation for the electric force. It is:
\(F_e=k\frac{q_1q_2}{d^2}\)By applying our values we get
\(F_e=(9*10^9)\frac{(16.074*10^{-6})*(16.074*10^{-6})}{(4.439)^2}=0.118N\)Now, if we remind ourselves of Newton's law, we know that
\(\vec{F}=m.\vec{a}\)We know the mass, and we know the Force, so we can find out the acceleration, this gives us:
\(0.118=0.967*a\)Thus
\(a=\frac{0.118}{0.967}=0.122\frac{m}{s^2}\)Our final acceleration is 0.122 m/s^2
how to calculate force of gravity of an object when force of gravity of other gravity is given
Answers
Answer:
I know that F=Gm1m2/r^2 or F=GMn/r^2 and G is like the universal gravitational constant so I hope this helps
If the density of the object is lesser than density of the water, what will happen?
Answers
Explanation:
Compare the density of the object in question to the density of water. If its density is less than water, it will float. ... If the density of an object is greater than water, it will sink.
Answer:
The object will float.
Explanation:
If the density is less than of water, then the object will float. Take ice for example. It's density is less than water's density. That's why ice floats at the top of lakes. I hope this helps and I hope it's not wrong, but I don't think it is.
We do a thought experiment. We light with a flashlight against an air bubble in water. In the figure below, draw the continued path of the rays through the air bubble and out into the water. Justify why you drew as you did but you do not need to do any calculations.
Answers
Answer:
The transmission of light across a boundary between two media is accompanied by a change in both the speed and wavelength of the wave. ... As long as the light wave changes speed and approaches the boundary at an angle, refraction is observedFor a plane mirror, the image will be the same size as the object and will be the same distance behind the mirror as the object is in front of the mirror. Since the light forming the image does not pass through the image, it is called a virtual imageWhen light travels from air into water, it slows down, causing it to change direction slightly. This change of direction is called refraction. When light enters a more dense substance (higher refractive index), it 'bends' more towards the normal line.We do a thought experiment. We light with a flashlight against an air bubble in water. In the figure below, draw the continued path of the rays through the air bubble and out into the water. Justify why you drew as you did but you do not need to do any calculations.
The graph represents the simple harmonic motion of a mass on a spring.
Which arrow indicates the amplitude of the motion?
A
B
C
D
Answers
Answer:
B
Explanation:
Amplitude, in simple terms, is height of the peak. This is done by measuring the peak point to the middle line.
That is B.
7. Two people are pushing a 40.0kg table across the floor. Person 1 pushes with a force of 490N
[W], and person 2 pushes with a force of 565N (N). If the coefficient of kinetic friction between
the table and the floor is 0.613, determine the acceleration of the table.(12.7m/s2 [49.1° Nofw])
Answers
Answer:
20.4 \(m/s^{2}\)
Explanation:
To start doing this problem, first draw a free body diagram of the table. My teacher always tells us to do this, and I find that it is very helpful. I have attached a free body diagram to this answer- take a look at it.
First, let us see if Net force = MA. To do that, we need to determine whether the object is at equilibrium horizontally. For an object to be at equilibrium, it either needs to be moving at a constant velocity or not moving at all. Also, if an object is at equilibrium, there will not be any acceleration. But we know that there IS acceleration horizontally, so it cannot be in equilibrium. If it is not in equilibrium, we can use the formula ∑F= ma.
Let us determine the net force. Since the object is moving horizontally, we can ignore the weight and normal force, because they are vertical forces. The only horizontal forces we need to worry about are the applied force and force of friction.
Applied force = 1055 N (490 + 565)
Friction force= Unknown
To find the friction force, use the kinetic friction formula, Friction = μkN
μk is the coefficient, which the problem includes- it is 0.613.
N is the normal force, which we have to find.
*To find the normal force, we have to determine if the object is at equilibrium VERTICALLY. Since it has no acceleration vertically (it's not moving up/down), it is at equilibrium. Now, when an object is at equilibrium in one direction, it means that all the forces in that direction are equal. What are our vertical forces? Weight (mg) and Normal force (N). So it means that the Normal force is equal to the Weight.
Weight = mg = (40)(9.8) = 392 N
Normal force = 392 N
Now, plug it back into the formula (μkN): (0.613)(392) = 240.296 N
Friction = 240.296 N
Now that we know the friction, we can find the horizontal net force. Just subtract the friction force, 240.296 from the applied force, 1055 N
Horizontal Net Force: 814.704 N
Now that we know the net force, plug in the numbers for the formula
∑F= ma.
814.704 = (40.0)(a)
*Divide on both sides)
a = 20.3676 m/s^2
Round it to 3 significant figures, to get:
20.4 \(m/s^{2}\)
![7. Two people are pushing a 40.0kg table across the floor. Person 1 pushes with a force of 490N[W], and](https://i5t5.c14.e2-1.dev/h-images-qa/answers/attachments/4o1TYoulvk3kY2RItUgSqdwdgIkc8iPM.png)