Explanation:
When a battery is connected to a lightbulb properly, current flows through the lightbulb and makes it glow.
Jermaine and Lashonda each rub their dry hair with inflated balloons. While doing this, the other students notice that their hair is starting to stick straight out. Next, the teacher takes the balloons and places them right next to one another. However, the balloons will not stay next to each other, as they normally would. Instead, they spring apart in opposite directions. Explain what is causing these balloons to push each other away. A) There must be a vent in the classroom blowing the two balloons apart. B) They have each gained negative charge from the hair rubbing, and like charges repel each other. C) They have each gained negative charge from the hair rubbing, and like charges attract each other. D) The rubber balloons are simply bouncing off each other the way a rubber ball bounces off the floor.
Answer: B
Explanation:
Due to the rubbing of the balloons on their hair, the balloons have gained negative charges which lie on the balloons surfaces. Like charges will repel each other according to the Coulomb force
Which change to an object would reduce its potential energy by half?
A. Reducing its height to one half of its original value
B. Increasing its mass to twice its original value
оооо
O C. Increasing its height to twice its original value
O D. Reducing its mass to one-quarter of its original value
SUBMIT
Answer:
D
Explanation:
The area around the magnet where the force of the magnet attracts objects with metal is known as what?.
Help!!!!!!! Plsss!! Plsss!
Answer:
A
Explanation:
D is non-metal, gas, insulator
C is also non-metal, insulator
B is a metalloid, semiconductor, still have low melting point
A is a metal, solid, good conductor, have high melting point.
Answer:
This is Hard
Explanation:
I recommend asking a teacher for help
If a wooden ball has a mass of 2.4g and a volume of 6cm3. What is it’s density?
Answer:
The answer is 0.4 g/cm³Explanation:
The density of a substance can be found by using the formula
[tex]density = \frac{mass}{volume} \\[/tex]
From the question
mass = 2.4 g
volume = 6 cm³
We have
[tex]density = \frac{2.4}{6} \\ [/tex]
We have the final answer as
0.4 g/cm³Hope this helps you
PLEASE HELP ASAP !! I WILL MARK YOU BRAINLIEST!!
original question for context:
“Three identical metal spheres are used for an experiment.
Before the experiment begins the charges on the spheres
are as follows”
Sphere: A Charge: -4.0C
Sphere: B Charge: -8.0C
Sphere: C Charge: +9.0C
Total: -3C
By knowing that the total charge must remain constant, we will see that:
c)
Sphere A will have: -4.0 CSphere B will have: 0.5 CSphere C will have: 0.5 CTotal = -3.0 Cd)
Sphere A will have: -1.0 CSphere B will have: -1.0 CSphere C will have: -1.0 CTotal = -3.0 CWhat happens when we touch the charged spheres?
If these are conductor spheres, we can assume that the charge flows through the spheres.
So, when two touches, the charge tries to equilibrate.
When sphere B and sphere C touch, the total charge between them would be equally distributed between the two spheres.
Charge B = -8.0 C
Charge C = +9.0 C
Total = -8.0 C + 9.0 C = 1.0 C
half of that is 0.5 C
Then now both sphere B and sphere C will have 2.5C each.
And sphere A still has the -4.0 C
Then the total of the 3 spheres is:
0.5C + 0.5C - 4.0C = -3.0C
The total charge never changes in a closed system, remember that.
D) Similar to before, this time the total charge will be equally distributed among the 3 spheres.
The total charge is -3.0C
So:
Sphere A will have: -1.0 CSphere B will have: -1.0 CSphere C will have: -1.0 CAnd the total charge will be:
-1.0 C + -1.0 C + -1.0 C = -3.0C
If you want to learn more about charge conservation, you can read:
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A system consists of a disk rotating on a frictionless axle and a piece of clay moving toward it, as shown in the figure above. The outside edge of the disk is moving at a linear speed v, and the clay is moving at speed v/2. The clay sticks to the outside edge of the disk. How does the angular momentum of the system after the clay sticks compare to the angular momentum of the system before the clay sticks, and what is an explanation for the comparison?.
Explanation:
Forgive me If I am wrong, it's been a while since I've studied Torque.
The formula for the angular momentum is
momentum= I*w.
We can also write I*W as 1/2MR^2 * W so the extra mass coming from the block of clay would most likely cause the angular momentum to increase from the amount it was before.
The angular momentum of the system before and after the clay sticks will be the same.
Conservation of angular momentumThe principle of conservation of angular momentum states that the total angular momentum is always conserved.
Li = Lf
Iiωi = Ifωf
where;
Ii is the initial moment of inertiaIf is the final moment of inertiaωi is the initial angular velocityωf is the final angular velocityLi is the initial angular momentumLf is the final angular momentumThus, the angular momentum of the system before and after the clay sticks will be the same.
Learn more about angular momentum here: https://brainly.com/question/7538238
Describe and explain the action of optical fibres
particularly in medicine and communications
technology
Answer:
Optical fibers are used most often as a means to transmit light between the two ends of the fiber and find wide usage in fiber-optic communications, where they permit transmission over longer distances and at higher bandwidths (data rates) than wire cables.
Explanation:
what is the relationship between applied force and displacement
Answer:
Force in the Direction of Displacement. The work done by a constant force is proportional to the force applied times the displacement of the object
C
The unit of force, newton is a derived unit.
derived unit
Answer:
Because
Explanation:
5he force is not fundamental physical unit
How many minutes are in 2 1
4 hours?
Answer:
If you are meaning to say 214 the answer is 12840 minutes
Explanation:
1. Use the periodic table to determine which of the following groups of elements would have properties most similar to arsenic (As)
A . Boron (B) , silicon (Si) , and germanium (Ge)
B. Nitrogen (N), Phosphorous (P) , and antimony (Sb)
C. Germanium (Ge) , selenium (Se) , and bromide (Br)
D. Gallium (Ga) , germanium (Ge) , and selenium (Se)
Answer:
D
Explanation:
The correct answer would be option D.
Gallium (Ga) , germanium (Ge) , selenium (Se) , and arsenic (AS) all belong to the same group of elements referred to as the transition elements. The transition elements have partially-filled d orbital, a feature that confers some characteristic properties on the elements or their ions. These properties include:
variable oxidation state of formation of colored ions and compoundscatalytic propertyparamagnetic compoundsetc.A child tugs on a rope attached to a 0.62-kg toy with a horizontal force
of 16.3 N. A puppy pulls the toy in the opposite direction with a force 15.8 N.What is the acceleration of the toy? (Hint: Remember direction: towards child or puppy?)
Answer:
[tex]a=0.8\ m/s^2[/tex]
Explanation:
Given that,
Mass of a toy, m = 0.62 kg
Horizontal force, F = 16.3 N
Force on the opposite direction, F' = 15.8 N
We need to find the acceleration of the toy.
Here, two forces are acting in opposite direction, the net force will be the difference of forces.
Net force = 16.3 N-15.8 N
=0.5 N
The formula for net force is given by :
F = ma
a is the acceleration of the toy
[tex]a=\dfrac{F}{m}\\\\a=\dfrac{0.5\ N}{0.62\ kg}\\\\a=0.8\ m/s^2[/tex]
So, the acceleration of the toy is [tex]0.8\ m/s^2[/tex].
In physics, tension is described as the pulling force transmitted axially by the means of a string, a cable, chain, or similar object, or by each end of a rod, truss member, or similar three-dimensional object.
According to the question, the formula we use in this method is F = ma as we have to find the acceleration.
Therefore, the formula for the acceleration is
[tex]a= \frac{F}{m}[/tex]
[tex]a= \frac{0.5}{0.62}[/tex]
Hence, after the calculation, the acceleration is 0.8m/s.
For more information, refer to the link:-
https://brainly.com/question/12550364
Good evening! Can someone please answer this, ill give you brainliest and your earning 50 points. Would be very appreciated.
CAN SOMEONE ACTUALLY PLEASE ANSWER THIS AND NOT GIVE A RANDOM ANSWER, IT RUINS PEOPLE'S DAY SERIOUSLY.
Answer:
Option B
Explanation:
Green house gases are Carbon dioxide, sulphur dioxide etc.These gases absorb long wave photons of infrared light .They are the main reasons behind global warmingOnce the ball reaches the very top it's velocity is ?
A) zero
B) negative
C) accelerating
D) positive
1) A current is induced by moving a magnet in and out of a coil of wire. What will happen to the induced current if you move the magnet twice as fast?
-Nothing, The induced current will not change.
-The induced current will decrease.
- The induced current will increase.
-The induced current will change directions.
2) A student connects a battery to a light bulb using wires, creating a closed simple circuit. The student connects an ammeter to the circuit and places a compass next to the wires. The student then decides to connect a second battery to the circuit. Which statement describes the changes that will occur after connecting the second battery?
- The compass will detect an increase in current, and the ammeter will detect a stronger magnetic field.
-The ammeter will detect an increase in current, and the compass will detect a weaker magnetic field.
-The ammeter will detect an increase in current, and the compass will detect a stronger magnetic field.
-The compass will detect an increase in current, and the ammeter will detect a weaker magnetic field.
3) A student is comparing a step-up transformer with a step-down transformer. Which data should she collect from each device?
- the ratio of incoming and outgoing voltages
- the ratio of the number of turns in the primary coils
-the ratio of incoming and outgoing currents
- the ratio of the number of turns in the secondary coils
4)What happens to a copper wire when it is moved across a magnetic field?
-Voltage and electric current are induced.
-Electric current is induced, but not voltage.
-It is attracted to the negative pole of the magnetic field.
-It is attracted to the positive pole of the magnetic field.
The induced current will increase if we move the magnet twice as fast.
Relationship of magnet's speed and induced currentWe know that an induced current is produced by a changing magnetic field. The greater the speed of the magnet, the greater the magnitude of the current so we can conclude that the induced current will increase if we move the magnet twice as fast.
Learn more about current here: https://brainly.com/question/24858512
Answer:
The induced current will increase.
Explanation:
Calculate the weight of your 2kg physics book on earth
A.15 N
B.19.6 N
C.9.8 N
D.4.9 N
If your mass is 45 kilometers and you travel to Jupiter where the acceleration due to gravity is 25.95 m/s², how much would you weigh on Jupiter?
A. 441.05 N
B. 450.172 N
C. 1,167.75 N
D. 2,595.0 N
Answer: A or B?
Explanation: its either those 2
Which factor will not affect the speed of sound?
(size of the medium) or (elasticity of the medium)
Answer:
size of the medium
Explanation:
A motorcycle rider travelling at 30m/s sees a child run into the streets 190m ahead. If the rider takes 1 second to react before beginning to decelerate at a rate of 3m/s^2, does he stop in time, and if so by what distance is the child safe? (Hint: there a 2 stages of motion)
Answer:
The distance by which the child is safe is [tex]k = 10 \ m[/tex]
Explanation:
From the question we are told that
The speed of the motorcycle is [tex]v_n = 30 m/s[/tex]
The distance of the child from the motorcycle is L = 190 m
The reaction time is [tex]t_r = 1 \ s[/tex]
deceleration is [tex]a = -3m/s^2[/tex]
Generally the distance covered during the reaction time is
[tex]D = v_n * t_r[/tex]
=>[tex]D = 30 * 1[/tex]
=> [tex]D = 30 \ m[/tex]
Generally the distance covered during the deceleration
[tex]v^2 = u^2 + 2as[/tex]
Here v is the final velocity which is zero
So
[tex]0 = 30 ^2 + 2 * (-3)s[/tex]
=> [tex]s = 150 \ m[/tex]
So the total distance the motorcycle rider will cover before coming to rest is
[tex]d = D + s[/tex]
=> [tex]d = 30 + 150[/tex]
=> [tex]d = 180 \ m[/tex]
Therefore the amount of distance by which the child id safe is
[tex]k = L -d[/tex]
=> [tex]k = 190 -180[/tex]
=> [tex]k = 10 \ m[/tex]
An inclined plane P, 1.6 m long, makes an angle 30° with the horizontal. A point mass M is shot from the bottom of P at a point A with a speed Vo = 5 m/s up the plane of greatest slope. Neglect air resistance.
1. How long does it take M to reach B, the top of P? Then find its velocity.
2. M leaves the plane at B without meeting any obstacle to hit the horizontal plane containing A at a point C.
3. Determine the position of C. Give all necessary explanations
The given length of the inclined plane of 1.6 m. inclined at 30° to the horizontal, and point mass velocity of 5 m/s gives;
0.199 secondsThe distance traveled horizontally from the top is 0.086 m1.472 meters horizontally from A How can the time and distance of the mass be found?Length of the inclined plane = 1.6 m
Angle of inclination of the plane = 30°
Speed of the point mass = 5 m/s
1. Height of the top of P above ground, h is found as follows;
h = 1.6 m × sin(30°) = 0.8 m
The equation of motion that can be used is; h = u•t - 0.5•g•t^2
Which gives;
0.8 = 5•t - 0.5×9.81×t^2
0 = 5•t - 4.905×t^2 - 0.8
t = 0.199, or t = 0.821
The time it takes the point mass to reach the top is approximately 0.199 seconds2. At the top, we have;
Horizontal velocity, vx = 0.5 × cos(30°)
Which gives;
Horizontal velocity, vx = 0.433 m/s
The distance traveled, x is found as follows;
= 0.433 m/s × 0.199 s = 0.086 m
The distance traveled by the point mass x = 0.086 m3. The position of point C is therefore;
C(0.086 + 1.6 × cos(30°), 0)
C(1.472, 0)
Therefore;
The position of point C is 1.472 meters from point ALearn more about the equations of motion here:
https://brainly.com/question/24714911
Directions: Determine the absolute location of the following places.
1. Spain - _______
2. Japan- _______
3. England - _______
4. China - _______
5. Philippines - _______
Answers:
Spain = 42° N, 8° WJapan = 38° N, 138° EEngland = 55° N, 10° WChina = 35° N, 105° EPhilippines = 10° N, 122° ENote: The map doesn't mention "England", but instead it shows "United Kingdom". They are different but related concepts. I'll treat them as the same for the sake of simplicity.
====================================================
Explanation:
Since we're not talking about points, but rather large areas/countries, this means that an absolute single location doesn't make much sense.
However, we can try to go for the middle-most part of the country if possible.
Spain's northernmost and southernmost boundaries are between the 30° and 45° latitude lines in the northern hemisphere. The country appears to be closer to 45° N rather than 30° N. A good estimate is maybe something like 42° N. Though like I said, there's going to be wiggle room here depending which point you use as the representative point of Spain. The larger the country, the more variation in possible answers.
At the same time, much of Spain appears to be between the Prime Meridian and the longitude line 15° W. I'll split the difference and get (0+15)/2 = 15/2 = 7.5 = 8.
Therefore, one estimate of Spain's absolute GPS location is 42° N and 8° W
The other countries are handled in a similar fashion.
PLEASE HELP FAST
A 70kg physics student is pushed with the force of 140 N , what will be the students acceleration ?
Answer:
The answer is 2 m/s²Explanation:
The acceleration of an object given it's mass and the force acting on it can be found by using the formula
[tex]a = \frac{f}{m} \\ [/tex]
where
f is the force
m is the mass
From the question
f = 140 N
m = 70 kg
We have
[tex]a = \frac{140}{70} = \frac{14}{7} \\ [/tex]
We have the final answer as
2 m/s²Hope this helps you
Which object is accelerating downward at the slowest rate? a textbook falling onto the surface of the moon a flower pot that has been pushed out a window a pebble falling off a cliff through the air a baseball thrown from third base to first base
Answer:
The acceleration of textbook is downward at the slowest rate.
(a) is correct option.
Explanation:
Given that,
The object is accelerating downward at the slowest rate.
(a). a textbook falling onto the surface of the moon
(b). a flower pot that has been pushed out a window
(c). a pebble falling off a cliff through the air
(d). a baseball thrown from third base to first base
We know that,
Acceleration :
Acceleration is the product of mass of object and gravity.
[tex]a=mg[/tex]
We need to find the accelerating downward at the slowest rate
According to given data,
Acceleration depends upon weight and gravity.
We have some example of free fall.
(b), (c) and (d) are the example of free fall.
In which the gravity is same.
But in option (a) textbook falling onto the surface of the moon
We know that,
The gravity on the moon is less than the earth.
So, we can say that the acceleration of textbook is downward at the slowest rate.
Hence, The acceleration of textbook is downward at the slowest rate.
(a) is correct option.
create PHet waves and explain the different when it increase and decrease
The coefficient of friction between a car and dry pavement is approximately 0.7, but the coefficient on wet pavement is 0.4 or less. What does this indicate about driving on wet pavement? A) A car's normal force is less on wet pavement. B) A car's normal force is greater on wet pavement. C) A car requires less applied force to move on wet pavement. D) A car requires more applied force to move on wet pavement.
Answer:
D) A car requires more applied force to move on wet pavement
Explanation:
The coefficient of friction determines the frictional force that the ground applies on the car .
Maximum force of friction generated = μ R where μ is coefficient of friction and R is reaction force of the ground
Reaction force of the ground = mg or weight of the car . Since weight is same on dry and wet ground so normal force will be same is both the case .
Force of friction generated in respect of dry pavement will be more because of greater coefficient of friction .
Friction force helps in driving a car in forward direction hence it is easy to drive car on dry pavement . On wet pavement , it will slip off at the same place rather than move forward .
ASAP
An object was placed in 75 ml of water. When the object was then measured in the water, the new volume of the water with the object was 86 ml. What is the volume of the object?
Note: You only have to fill in the numerical answer.(no units)
Answer:
The answer is 11 mLExplanation:
To find the volume of the object we use the formula
volume of object = final volume of water - initial volume of water
From the question
final volume of water = 86 mL
initial volume of water = 75 mL
So we have
volume of object = 86 - 75
We have the final answer as
11 mLHope this helps you
What is the voltage of a computer if the current if 40A and the resistance is 20 ohms?
Voltage = current x resistance
Voltage = 40 x 20 = 800 volts
Answer:
800v
Explanation:
v=IR
where V =Voltage,
I= Current
R= Resistance
V= 40x20
800v
What is the potential energy of a 150 kg diver standing on a diving board that is 10 m high the potential energy is what
Answer:
14715J
Explanation:
Ep = mgh
given that ,
m = 150kg
h =10
g = 9.81 m/s^2
Ep = 150 × 10 × 9.81
Ep= 14715J
Answer:
entergy is measured by weight mass and height
Explanation:
car that is moving with a speed of 36 m/s brakes to a stop in 12 seconds. Calculate the acceleration of
the car during the braking
Answer:
how?
Explanation: