Which statement best describes science?
Answer:
Science is a collection of knowledge about the natural world, but it is also the process of discovering how the natural world works. It is supported by evidence.
Answer: The correct answer is C). Science is a collection of knowledge about the natural world, but it is also the process of discovering how the natural world works.
Explanation:
A force of 20 N acted on a 5 kg object, moving it a distance of 4 m. How much work was done on the object?
Answer:
400J
Explanation:
The work done by the force on the object is 80 J.
What is work ?The work is defined by the product of force and displacement. Its unit of measurement is joule. And the formula is,
Work = Force ×Displacement
Or mathematically it is W = F.d
In the question given data ,[tex]F = 20N , d = 4m\\[/tex]
putting in the above formula ,W = 20 × 4
W = 80 J
Hence the work done by the force is 80J.
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Un campo eléctrico es creado por una carga eléctrica de 5 microcoulomb, a 35 cm se coloca una carga de prueba la cual es atraída por una fuerza de 1,5 N. Determinar:
Answer:
Supongo que queremos determinar la carga de la carga de prueba.
Sabemos que la fuerza culombiana entre dos cargas q₁ y q₂, separadas por una distancia R, está dada por:
[tex]F = k_c*\frac{|q_1*q_2|}{R^2}[/tex]
Aislandolo para una de las cargas, obtenemos:
[tex]\frac{F*R^2}{kc*|q_1|} =|q_2|[/tex]
En este caso sabemos:
fuerza atractiva, por lo que los signos de las cargas son opuestos.
q₁ = 5 mC
R = 35cm
F = 1.5 N
Kc = 9*10^9 N*m^2/C^2
Un primer paso, seria reescribir todos los valores en las mismas unidades.
Sabiendo que:
100cm = 1m
R = 35cm = (35/100) m = 0.35m
Y sabiendo que:
1mc = 1*10^(-6) C
Entonces:
q₁ = 5 mC = 5*1*10^(-6) C = 5*10^(-6) C
Ahora podemos reemplazar esos valores en la ecuación de la fuerza, para obtener el valor de la otra carga:
[tex]\frac{15N*(0.35m)^2}{(9*10^9 N*m^2/C^2)*5*10^{-6}C} =|q_2| = 4.08*10^{-5} C[/tex]
Y recordar que las cargas tienen signo opuesto, entonces la carga de la carga de prueba es:
q₂ = -4.08*10^-5 C
Una grúa está subiendo una caja de 1000 kg atada a una cadena. La caja, que inicialmente está en reposo, incrementa su velocidad 4 m/s cada segundo
Answer:
40 metros en 10 segundos.
Explicación:
Una grúa está levantando una caja de 1000 kg atada a una cadena y la caja, que inicialmente está en reposo, aumenta su velocidad en 4 m / s por segundo, por lo que si la región de colocación está a 40 metros de distancia, la grúa tarda 10 segundos en completar el proceso. tarea de movimiento y colocación de la caja. La grúa se utiliza para levantar y mover cargas pesadas, máquinas, materiales y mercancías para diferentes propósitos. Entonces el trabajo realizado por la grúa depende de la velocidad y la distancia de colocación.
A function is defined by f(x)= 6x+1.5. What is f(2.5)?
Answer:
f(2.5) = 16.5
General Formulas and Concepts:
Pre-Algebra
Order of Operations: BPEMDAS
Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to RightAlgebra I
FunctionsFunction NotationExplanation:
Step 1: Define
Identify
[Function] f(x) = 6x + 1.5
[Given] f(2.5) is x = 2.5 for function f(x)
Step 2: Evaluate
Substitute in x [Function f(x)]: f(2.5) = 6(2.5) + 1.5Multiply: f(2.5) = 15 + 1.5Add: f(2.5) = 16.5How long does it take you to create 200 Watts of power if you use 1000 J of
work?
Answer:200,000
Explanation:
p=w/t
200=1000/t
t=200*1000
time=200,000
Some people can roll the tongue into a tube shape, while others cannot. Practicing is not likely to help because tongue-rolling is an inherited trait. The allele for rolling the tongue (R) is dominant to the allele for not being able to roll the tongue (r). Look at the Punnett square. It shows a cross between two parents with at least one R allele. Drag each option to its spot to correctly finish the Punnett square.
Hope this helps you.
46. Nuclear generating plants use the potential
energy stored in
to generate electrical
energy. (12.5)
Answer:
nuclear battery to generate energy
True or false? Potential difference is measured in joules
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uhm i think TRUE✨
I'm not sure hehe.
If one joule of energy is required to move one coulomb of charge through a component in a circuit, then the potential difference across the component is one volt (or 1 joule per coulomb).__________________________________
“The Lord your God is in your midst — a warrior bringing victory. He will create calm with his love; he will rejoice over you with singing.” — Zephaniah 3:17 ❤
__________________________________
Potential difference is measured in joules is true statement.
What is potential difference?The difference in charge carriers' energy between two places in a circuit is known as the potential difference.
Voltage is another name for potential difference (p.d.), which is expressed in volts (V). When charge carriers move through electrical components in a circuit, energy is delivered to those parts. To determine the potential difference, we use a voltmeter (or voltage).
The amount of current multiplied by the resistance equals the potential difference, which is the same as voltage. One Coulomb of charge uses one Joule of energy to move between two points in a circuit, which is equal to a potential difference of one Volt.
Therefore, Potential difference is measured in joules is true statement.
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A car lows down at -5.00m/s^2 until it comes to a stop after traveling 15.0m. How much time did it take to stop
Answer:time taken is 6 seconds
Explanation:
Answer: 2.45 seconds
Explanation: Acceleration a = -5, distance s = 15, time = ?.
Final velocity = v = 0.
We need to use the equations of motion under constant acceleration.
v^2 = u^2 + 2as where u is the initial velocity
0 = u^2 + 2*-5*15
u^2 = 150
so u = √150
Now we use v = u + at:
0 = √150 - 5t
t = √150/5
t = 2.45 seconds.
Your friends sit in a sled in the snow. If you apply a force of 95N to them they have an acceleration of 0.8 m/s2. What is their mass
A force of 120N acts on 200g of an object. Calculate the acceleration of the object
Answer:
Explanation:
This is very straightforward, except that we need the mass in kg and it's in g. So we have to convert first, using the fact that there are 1000g in 1 kg:
[tex]200g*\frac{1kg}{1000g}=.200kg[/tex] and now we're ready to solve your problem.
F = ma and
120 = .200a so
a = 6.0 × 10² (which is 600 m/s/s)
Which statements describe acceleration? Check all that apply.
Negative acceleration occurs when an object slows down in the positive direction.
Negative acceleration occurs when an object slows down in the negative direction
Negative acceleration occurs when an object speeds up in the negative direction.
O Positive acceleration occurs when an object speeds up in the positive direction.
Positive acceleration occurs when an object speeds up in the negative direction.
Positive acceleration occurs when an object slows down in the negative direction.
Answer:
Negative acceleration occurs when an object slows down in the positive direction.
Negative acceleration occurs when an object speeds up in the negative direction.
Positive acceleration occurs when an object speeds up in the positive direction.
Positive acceleration occurs when an object slows down in the negative direction.
Explanation:
Basically same sign is speeding up and different sign is slowing down
What are the chemicals that react with one another in a chemical reaction?
Answer:
reactants react with eachother
Explanation:
yep
goodie morning
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what is nitric acid?
Answer:
Nitric acid, also known as aqua fortis and spirit of niter, is a highly corrosive mineral acid. The pure compound is colorless, but older samples tend to acquire a yellow cast due to decomposition into oxides of nitrogen and water. Most commercially available nitric acid has a concentration of 68% in water.
Explanation:
Good morning...
Nitric acid production is mainly driven by fertilizer industry. Nitric acid is used in the production of ammonium nitrate and calcium ammonium nitrate which find applications as fertilizers.
Types of energy transformation
Answer:
This is the types of energy transformation
Explanation:
hope it helps
If two students push a box with a force of 3N in the same direction, and there is no other unbalanced force on the box, what is the magnitude of the net force on the box? *
0N
3N
6N
9N
Answer:
SILEM B
Explanation:
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A 27 kg disk with a radius of 1.3m is spinning at an angular speed of 15 rad/s. What is the rotational kinetic energy of the disk?
Answer:
the rotational kinetic energy of the disk is 5,133.375 J
Explanation:
Given;
mass of the disk, m = 27 kg
radius of the disk, r = 1.3 m
angular speed, ω = 15 rad/s
The rotational kinetic energy of the disk is calculated as;
[tex]K.E_{rot} = \frac{1}{2}I \omega^2\\\\ where;\\I \ is \ moment \ of \ inertia\\\\K.E_{rot} = \frac{1}{2} \times (mr^2) \times \omega ^2\\\\ K.E_{rot} = \frac{1}{2} \times (27\times 1.3^2) \times \ 15^2\\\\K.E_{rot} = 5,133.375 \ J[/tex]
Therefore, the rotational kinetic energy of the disk is 5,133.375 J
Accuracy of physical balance is dash
Answer:
the answer for this is my.
What is moment? Write down the law of moment.A long spanner is used to unscrew the tight nut.Why?
Answer:
Moment is the product of force and its perpendicular distance from a point along its line of action.
The net moments on clockwise and anticlockwise is zero at a point.
The net force applied on a spanner handle is equal to the moment of the rotation
A standing wave measures 12 m between its first and fourth node and its frequency 325 Hz. What is the standing wave's speed?
1300 m/s
380 m/s
1500 m/s
750 m/s
Answer:
1300 m/s
Explanation:
Applying,
v = λf/2............... Equation 1
Where v = velocity or speed of wave, f = frequency of wave, λ = wavelength of wave.
From the question,
Given: f = 325 Hz, λ = (12×2/3) = 8 m
Substitute these values into equation 2
v = 325(8)/2
v = 1300 m/s.
Hence the standing wave speed is 1300 m/s
The right option is 1300 m/s
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The rate at which electric
charges flow through a
circuit
Answer:
The answer is Current.
Determine the force exerted by two particles that have a charge of +0.35 Coulombs each and are 1 meter apart
The electric force between two charges is:
F = (9 x 10⁹) Q₁ Q₂ / D²
F is the force, in Newtons
Q₁ and Q₂ are the two charges, in Coulombs
D is the distance between them, in meters
For these two particles:
F = (9 x 10⁹) (0.35) (0.35) / (1)²
F = (9 x 0.35 x 0.35 x 10⁹) / (1)
F = 1.10 x 10⁹ Newtons
Thatsa lotta force . . . like 124 thousand tons !
The reason it's so big is because the charges in this question are so big ... 0.35 Coulombs each. 1 Coulomb is a huge amount of charge.
Each of the particles feels the same force, pushing it away from the other particle. (The electric force between two charges is always the same in both directions, just like the gravitational force between two masses.)
Acc. to columb's law;
F = k × Q1Q2/r²Clearly, from the question you have:
Charge on both particles = +0.35 columbsDistance between them = 1 meter = 1 × 10-¹⁰ ÅNow just put them up in the formula:
F = k × Q1Q2/r²
F = 9 × 10⁹ × 0.35 × 0.35/1 × 10-¹⁰
F = 9 × 10⁹ × 35 × 35/ 10-¹⁰ × 100 × 100
F = 9 × 10⁹ × 35 × 35/ 10-¹⁰ × 10⁴
F = 9 × 10⁹ × 35 × 35/ 10-⁶
F = 9 × 10⁹+⁶ × 1225
F = 11025 × 10¹⁵
Atoms are attracted to each other because____
A) electrons are attracted to protons because they have opposite charges
B) magnets pull them together
C) the protons are attracted to each other because they have the same charge
D) they have some energy
Answer:
A
Explanation:
Opposite attract. Since electrons are negative they will be attracted to the protons because they a positive
A 14300 kg airplane is flying at an altitude of 147 m at a speed of 214 m/s. determine the airplane's total mechanical energy.
Answer:
Mechanical energy in Joules:
348,041,980
The total mechanical energy of the airplane is equal to 348,041,980 Joules.
Given the following data:
Mass = 14300 kgHeight = 147 meters.Velocity = 214 m/s.Scientific data:
Acceleration due to gravity on Earth = 9.8 [tex]m/s^2[/tex]To calculate the total mechanical energy of the airplane:
How to calculate total mechanical energy.The total mechanical energy possessed by this airplane is equal to the sum of both the potential energy and kinetic energy at the given altitude.
Mathematically, the total mechanical energy is given by this formula:
[tex]E = \frac{1}{2}mv^2 + mgh[/tex]
Substituting the given parameters into the formula, we have;
[tex]E = \frac{1}{2}\times 14300 \times 214^2 + 14300 \times 9.8 \times 147\\\\E=7150 \times 45796 + 20600580\\\\E= 327441400 + 20600580[/tex]
E = 348,041,980 Joules.
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Many scientific discoveries are made by chance. While studying one phenomenon, a scientist may discover a different one. Such was the case when William Herschel discovered the planet Uranus in 1781. Herschel was charting faint stars in the sky, when he discovered something that was not a star. How can astronomers tell the difference between a star and a planet
Answer:
One simple explanation is that planets move, while stars remained fixed in the sky. You can observe a planet's orbit, but a star will stay in the same position.
Explanation:
Stars emit their own light due to thermonuclear fusion while planets have fixed orbits and they do not have their own light.
What are the differences between a planet and a star?A star can be described as an astronomical body that possesses a light that causes it to reflect the light. A planet can be described as a fixed celestial body with a fixed path that spins on its own axis and reflects the light from an external source. Planets do not have an internal light source and receive light from external sources such as the Sun.
Stars have incredibly hot high temperatures while planets have relatively low temperatures. Stars produce their own light but planets are incapable of producing their own light.
Stars exhibit the unique effect of twinkling in the sky while planets do not exhibit the twinkling effect. The position of stars changes but can be seen only after a long time while planets in orbits change their positions constantly.
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A 15.0 kg crate, initially at rest, slides down a ramp 2.0 m long and inclined at an angle of 20.0° with the horizontal. Using the work-kinetic energy theorem and disregarding friction, find the
velocity of the crate at the bottom of the ramp. (g = 9.81 m/s?)
The component of the crate's weight that is parallel to the ramp is the only force that acts in the direction of the crate's displacement. This component has a magnitude of
F = mg sin(20.0°) = (15.0 kg) (9.81 m/s^2) sin(20.0°) ≈ 50.3 N
Then the work done by this force on the crate as it slides down the ramp is
W = F d = (50.3 N) (2.0 m) ≈ 101 J
The work-energy theorem says that the total work done on the crate is equal to the change in its kinetic energy. Since it starts at rest, its initial kinetic energy is 0, so
W = K = 1/2 mv ^2
Solve for v :
v = √(2W/m) = √(2 (101 J) / (2.0 m)) ≈ 10.0 m/s
what is electricity?write any two defects of a simple cell.
Answer:
Electricity is the set of physical phenomena associated with the presence and motion of matter that has a property of electric charge. Electricity is related to magnetism, both being part of the phenomenon of electromagnetism, as described by Maxwell's equations.
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