What is the best way to arrange the magnets on the train and on the track so that the model train levitates?
Answer:
See below
Explanation:
So the magnets poles are opposed and the magnets REPEL each other
9. If the magnitude of two vectors and their resultant are the same, what is the angle between the two vectors?
The angle between the two vectors of the same magnitude would be 120 degrees to have the resultants the same.
answer: 120 degrees
what is the density of an object with mass of 60 g and a volume of 2cm3
Answer:
D=mass /volume
=60/0.002
=30000
Why burette calibrated from top to bottom?
Answer:
In order to measure the amount of solution added in or drained out, the burette must be observed at eye level straight to the bottom of the meniscus. The liquid in the burette should be completely free of bubbles to ensure accurate measurements.
What is the value of a in the function’s equation?
A.
3
B.
-2
C.
2
D.
-3
Answer:
Explanation:
What is the value of a in the function's equation?
A. -2
B. -3
C. 3
D. 2
ANSWER: c.
Two springs are attached to two hooks. When equal weights are suspended from each spring, both stretch the same amount. What can be assumed about the force constants of both?
It can be assumed that the spring constant will be same.Because the weight applied and the extension is same
What is spring force?The force required to extend or compress a spring by some distance scales linearly with respect to that distance is known as the spring force. Its formula is
F = kx
Two springs are attached to two hooks. When equal weights are suspended from each spring, both stretch the same amount.
Extensions will be greater in spring B than in spring A.Remember that the force constant represents the spring's stiffness,
Hence It can be assumed that the spring constant will be same.Because the weight applied and the extension is same.
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is the amount of force acting on a given area.
Answer:
[tex]\huge\boxed{\sf Pressure}[/tex]
Explanation:
Pressure:
The amount of force acting on per unit area is called pressure.Mathematical form:
[tex]P = \frac{F}{A}[/tex]Unit:
The unit of pressure is N/m² or Pascal. Many other units are also used for pressure.[tex]\rule[225]{225}{2}[/tex]
A circuit connected to a battery of 1.9 voltage. has a current of 0.07 amps. What is the resistance
of the circuit
Answer:
27.14 ohms
Explanation:
V = IR
V/I = R
1.9 v / .07 a = 27.14 ohms
What are the assumptions on which the cosmological principle is based?.
What is the speed of a wave that has a frequency of 250Hz and a Wavelength of 1.5 m?
Question :-
What is the Speed of a Wave that has a Frequency of 250 Hertz and a Wavelength of 1.5 meter ?Answer :-
Speed of the Wave is 350 m/s .Explanation :-
As per the provided information in the given question, we have been given that the Frequency of the Sound Wave is 250 Hertz. Its Wavelenght is given as 1.5 Meter. And, we have been asked to calculate the Speed of the Wave.
For calculating the Speed , we will use the Formula :-
[tex] \bigstar \: \: \boxed {\sf { \: Speed \: = \: Frequency \: \times \: Wavelenght \: }} [/tex]
Therefore , by Substituting the given values in the above Formula :-
[tex] \Longrightarrow \: \: \sf { \: Speed \: = \: Frequency \: \times \: Wavelenght }[/tex]
[tex] \Longrightarrow \: \: \sf { \: Speed \: = \: 250 \: \times \: 1.5 }[/tex]
[tex] \Longrightarrow \: \: \bf { \: Speed \: = \: 375 }[/tex]
Hence :-
Speed of the Wave = 375 m/s .[tex] \underline {\rule {180pt}{4pt}} [/tex]
Speed = Frequency Wavelenght
Speed
Speed
Hence :
Speed of the Wave = 375 m/s.
=
250 x 1.5
375
what is the force acting on an object with a mass of 150 kg starting from rest and traveling 15m/s in 250s?
Answer:
9N
Explanation:
F = ma
F = 150kg × (15 - 0)m/s / 250s
F = 9N
An astronaut is planning a trip to a newly-discovered planet. According to 2 points
the Law of Universal Gravitation, the astronaut's weight on the new planet
will be greater than his weight on Earth if:
-the new planet has less gravity than Earth.
-the new planet has the same gravity as Earth.
-the new planet has more gravity than Earth.
-the gravity of the planet doesn't matter.
-Weight is the same everywhere in the
universe.
Answer:
The new planet has more gravity
Explanation:
gravity force = G m1 m2 / r^2
decresing r or increasing the planet mass will increase the force
Which two factors are used to calculate the kinetic energy of an object?
Answer: Mass and velocity
K = 0.5*m*v^2
Explanation:
Hope it helps!
Answer:
mass and velocity
Explanation:
Kinetic Energy = 1/2 * m * v^2 m= mass v = velocity
Read the scenario and social media post.
Damien is researching organic gardening, which avoids pesticides—chemicals used to kill harmful insects. While looking for sources, he runs across this social media post.
Answer:
No answer
Explanation:
Because there is no question
Answer:
C. Biased in favor of pesticides.
Explanation:
What is the relationship between frequency and wavelength?
Answer:
The wave with the greatest frequency has the shortest wavelength. Twice the frequency means one half the wavelength.
Explanation:
Frequency and Wavelength are inversely proportional to each other.
HELP!
Explain how the conservation of energy and the conservation of matter might still be considered true when put together in spite of the ability of each to convert into the other.
Answer:
the conservation of both matters because without each other the balance of nature will be destroyed it helps in such a way that the food chain will be maintained.
it is as such considered because without matter there would be no energy and the reverse is such.
it is still considered because without one another famous atomic theories wouldn't have been made such as gas, liquid and solid.
in conclusion all these work together to balance the galaxy as a whole
Both the conservation of energy and the conservation of matter is important because, without each other, the natural equilibrium will be disrupted.
What is the law of conservation of energy?According to the Law of conservation of energy. Energy can not be created nor be destroyed it can transfer from one to another form.
The total energy is the sum of all the energies present in the system. The potential energy in a system is due to its position in the system.
The conservation of both is important because without each other, the natural equilibrium will be disrupted, and it aids in the maintenance of the food chain.
It is seen as such because there would be no energy without matter and vice versa.
Hence both the conservation of energy and the conservation of matter is important
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You are generating traveling waves on a stretched string by wiggling one end. If you suddenly begin to wiggle more rapidly without appreciably affecting the tension, you will cause the waves to move down the string.
Answer:
At the same speed as before
Explanation:
Speed is dependent on the tension in the string, and since the tension isn't changing, the speed of the waves will also not change.
An 80g meter stick is supported at its 30 cm mark by a string attached to the ceiling. A 20 g mass is hung from the 80 cm mark what mass should be hung at the 5 cm mark on the meter stick to keep it horizontal and in equilibrium?
Answer:
[tex]104\; {\rm g}[/tex], assuming that the meter stick is uniform with the center of mass precisely at the [tex]50\; {\rm cm}[/tex] mark.
Explanation:
Refer to the diagram attached. The meter stick could be considered as a lever. The string at the [tex]30\; {\rm cm}[/tex] mark would then act as the fulcrum of this lever.
The [tex]m_{A} = 20\; {\rm g}[/tex] mass at the [tex]80\; {\rm cm}[/tex] mark is at a distance of [tex]r_{A} = 50\; {\rm cm}[/tex] to the right of the fulcrum at [tex]30\; {\rm cm}[/tex].
The weight of the [tex]80\; {\rm g}[/tex] meter stick acts like a weight of [tex]m_{B} = 80\; {\rm g}[/tex] attached to the center of mass of this meter stick. Under the assumptions, this center of mass of this meter stick would be at the [tex]50\; {\rm cm}[/tex] mark, which is [tex]r_{B} = 20\; {\rm cm}[/tex] to the right of the fulcrum at [tex]30\; {\rm cm}[/tex].
Let [tex]m_{C}[/tex] be the mass attached to the meter stick at the [tex]5\; {\rm cm}[/tex] mark. This mass would be at a distance of [tex]r_{C} = 25\; {\rm cm}[/tex] to the left of the fulcrum at [tex]30\; {\rm cm}[/tex].
At equilibrium:
[tex]\begin{aligned} & m_{C}\, r_{C} && (\text{mass on the left of fulcrum})\\ &= m_{A}\, r_{A} + m_{B} \, r_{B} && (\text{mass on the right of fulcrum})\end{aligned}[/tex].
Solve for [tex]m_{C}[/tex], the unknown mass attached to the meter stick at the [tex]5\; {\rm cm}[/tex] mark:
[tex]\begin{aligned}m_{C} &= \frac{m_{A}\, r_{A} + m_{B}\, r_{B}}{r_{C}} \\ &= \frac{20\; {\rm g} \times 50\; {\rm cm} + 80\; {\rm g} \times 20\; {\rm cm}}{25\; {\rm cm}} \\ &= 104\; {\rm g}\end{aligned}[/tex].
A transfer of energy from thermal to potential
Conduction
The material which suppose Conduction called conductorsIn this heat is transmitted from one thermal to another .Metals are usually good conductors where as non metals are notExplanation:
According to online, "thermal energy is just a fancy word for heat energy. It's a form of both potential and kinetic energy. If you remember, the electrons of an atom have potential energy. Once you apply pressure to the electrons, they start to move rapidly, banging into each other, and releasing thermal energy as heat."
Thermal energy transfers occur in three ways: conduction, convection, and radiation
Mr. Ben drove from Town A to Town B. For the first 3 hours, he
traveled at an average speed of 60 km/h, and after that, he drove at another average speed of 70 km/h. If the distance between Town A and B is 460 km, what was the total time for the whole journey?
The total time for the whole journey = 7 hours
Distance = Speed x time
Distance traveled for the first 3 hours
time = 3 hours
speed = 60 km/h
Distance = 60 x 3
Distance = 180 km
180 km was traveled for the first three hours
Total distance traveled = 460 km
Distance traveled at an average speed of 70 km/h = 460 - 180
Distance traveled at an average speed of 70 km/h = 280 km
Speed = Distance / time
70 = 280 / time
time = 280 / 70
time = 4 hours
Mr. Ben traveled 3 hours at an average speed of 60 km/h, he traveled 4 hours at an average speed of 70 km/h.
The total time for the whole journey = 3 hours + 4 hours
The total time for the whole journey = 7 hours
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When white light is refracted by a prism, which color of light is bent the least? red yellow green
Answer:
Red light would bend the least, because of its wavelengths in the sun, also basing on how reflective the prism or light source is.
__________________________________________________________
Questions?Ask in comments.
Which sentence correctly uses a comma to separate coordinate adjectives?
Answer:
..
Explanation:
Coordinate adjectives are adjectives that describe the same noun equally. They should be separated with commas. In this sentence, both red and round are describing the ball. The correct answer is, "The red, round ball is Adley's favorite toy to play with."
The first step in responding to any sports injury is to __________.
A.
remove the danger that lead to the injury
B.
ensure that the player's air way is not obstructed
C.
begin chest compressions for CPR
D.
ask the player to stop playing the sport
Please select the best answer from the choices provided.
A
B
C
D
Answer:
remove the danger that lead to injury
Explanation:
The best way is
spot the reason for injuryThen try best to remove that cause as fast as possible.Then spot the place of body where injury happenedNOW treat for thatAnswer:
A
Explanation:
The first step in responding to an injury in sports is to remove the danger that led to the injuryB cannot be correct because if an athlete suffers a broken leg you don't check their air ways primarilyC is also not right as that is only when the player is unconsciousD is not right as that is the result of only a very life-threatening injuryA is the right answerWhat is an Astroid belt
At the top of the arc of a pendulum the value of the _____ is zero. kinetic energy potential energy acceleration All of the above
At the top of the arc in a swinging pendulum the value of the kinetic energy is zero.
What is Kinetic energy?This is defined as the energy possessed by a body virtue of its motion or movement.
When a pendulum swings, it possesses kinetic energy which is usually zero at the top of the arc after which it possesses potential energy as a result of the resting position.
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What is the kinetic energy of a 38g soccer ball that is traveling at a speed of 80. m/s? Convert
Answer:
1.52 JExplanation:
Kinetic energy formula
K.E. = 1/2mv²Given
m = 38 g = 0.038 kg [kg is standard unit]v = 80 m/sSolving
K.E. = 1/2 x 0.038 x 80K.E. = 40 x 0.038K.E. = 1.52 Jm=0.038kg
v=80m/s
Kinetic energy
1/2mv²1/2(0.038)(80)²6400(0.038)/23200(0.038)121.6JEvery time your cat's paw hits her toy string, it swings away from her. How does
this demonstrate Newton's third law of motion?
Objects with mass, such as your cat's paw and toy string, will require inertia.
Objects in action, such as the string toy, will experience force.
For every motion from your cat's paw, there is unbalanced inertia from the string.
For every action your cat makes, there is an equal and opposite reaction from the string.
Answer:
D?
Explanation:
Newton's Third Law of Motion: For every action, there is an opposite reaction, and forces come in pairs
Answer: Answer choice D
Explanation:
Newtons 3rd law states that for every action there is an equal and opposite reaction. In the scenario, the cat hitting the toy is the action, and the ball swinging away is the reaction.
Water shortages means.no no no links pls
Answer:
The lack of sufficient water resources, including a lack of access t safe water supplies, to meet water needs within a region.
Explanation:
The Schwarzschild radius of a black hole depends on ________.only the mass of the black holeboth the mass and density of the black holethe way in which the black hole formedthe observationally measured radius of the black hole
The Schwarzschild radius of a black hole depends on the mass and density of the black hole because volume is the space that an object occupies.
What is volume?Volume is defined as the amount of space occupied by an object. It can be measured in cubic units. If the black hole has more volume then it has more radius and vice versa.
So we can conclude that the Schwarzschild radius of a black hole depends on the mass and density of the black hole because volume is the space that an object occupies.
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Four identical particles of mass m are mounted at equal intervals on a thin rod of length l and mass m, with one mass at each end of the rod.
Answer:
Moment of inertia at distance L / 2 from center
I1 = M (L / 2)^2 = M L^2 / 4
I2 = M (L / 6)^2 = M L^2 / 36 at a distance of L / 6
I (1/2 rod) = I1 + I2 = M L^2 (1/4 + 1/36) = M L^2 (9 + 1)/ 36 = 5/ 18 M L^2
I for entire rod = 2 I (1/2 rod) = 5 / 9 M L^2