When a car traveled on a flat road, keeping its kinetic energy increased over time, while its potential energy remained constant. The correct option is A.
What is mechanical energy?Mechanical energy is the sum of kinetic energy and potential energy.
As the car's kinetic energy is increasing, but there is no change in potential energy, then mechanical energy will increase.
Therefore, the car’s mechanical energy increased because the sum of the car’s kinetic and potential energy increased over time. The correct option is A.
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Which coefficients (in order) would BEST balance this chemical equation?
Answer:
1 N2 +3 H2 ---> 2NH3
Explanation:
hope this helps
do mark it :D
Why is it so hot along the equator?
a volleyball player has spiked the ball. At the instant the ball leaves her hand, it is 2.6 m above the ground and has an initial vertical velocity of -20 m/s. How long will it take the ball to strike the ground if the opposing team doesn't block it?
Answer: 29.48 s
Explanation:
Given
The initial height of the ball is [tex]h=2.6\ m[/tex]
The ball leaves with an initial velocity of [tex]u=-20\ m/s[/tex]
Using the equation of motion
[tex]h=ut+\dfrac{1}{2}at^2\\\text{Insert the values}\\\\2.6=20\cdot t+\dfrac{1}{2}\times 9.8\times t^2\\\\\Rightarrow 9.8t^2+20t-5.2\\\\\Rightarrow t=\dfrac{-20\pm \sqrt{20^2-4\times 9.8\times (-5.2)}}{2\times 9.8}\\\\\Rightarrow t=\dfrac{-20\pm 603.84}{19.8}\\\\\Rightarrow t=29.48\ s\quad [\text{Neglecting negative t}][/tex]
Therefore, it take 29.48 s for ball to reach the ground.
The emission spectrums are known for the elements below.
What elements are in the unknown sample?check all that apply
Answer: Hello your question is incomplete, I was able to find the question online but I am unable to attach it due to plagiarism rules
answer : Lithium and Potassium
Explanation:
The elements that are in the unknown sample are : Lithium and Potassium
An Emission spectrum is used to determine the composition of a material and it is distinctively different for each element that us found on the period table
How to find resultant of all vectors?
Answer:
To draw the resultant vector, join the tail of the first vector with the second vector's head and put the arrowhead. To determine the magnitude, measure the length of resultant R, and to find out the direction, measure the angle of the resultant with the x-axis.
A boy is pulling his two sisters on a sled.
If one sister weigh 30.0 kg, the other
weights 40.0 kg, and the coefficient of
kinetic friction is 0.120, how much force
is required to pull the sled?
[?] N
Answer:
Explanation:
The oly way we can figure this out is if the boy is pulling the sled at a constant velocity. If not, we need a value for acceleration, and you don't have that here. If the boy is pulling the sled at a constant velocity, then the value for acceleration is 0, making this a really simple problem. I'm going with that, since there is no way to answer you otherwise. If velocity is not constant, please either repost the question or put it in the notes section under the question as it stands. If acceleration is 0, then
F - f = ma becomes
F - f = m(0) which is
F - f = 0 and
F = f which says that the applied force is the same as the frictional force. We need then to find the frictional force, which has an equation of
f = μ[tex]F_n[/tex] where normal force is the same as the weight of the 2 girls. We will find that, then:
Each girl's mass is different so the normal force/weight equation is
w = (30.0)(9.8) + (40.0)(9.8) to get
w = 290 + 390 and
w = 680. Plug that into the frictional force equation:
f = (.120)(680) so
f = 82N
How much farther away from a current-carrying wire would you
have to stand in order for the magnetic field generated by the
wire to be half as strong?
Answer: Your question is open ended therefore i will provide a general answer based on the general concept of your question.
Answer : At half distance between the center of the Magnetic field the magnetic pole the effect of the magnetic field generated will be half as strong
Explanation:
Magnetic force ∝ 1 / d^2
This simply means increase in the squared distance of an object leads to the decrease in the effect of the magnetic field generated by a current carrying wire.
Hence ;
At half distance between the center of the Magnetic field the magnetic pole, the effect of the magnetic field generated will be half as strong
Half the distance from a current-carrying wire to the body required to stand, in order for the magnetic field generated by the wire to be half as strong.
What is magnetic field?The magnetic field is the field in the space and around the magnet in which the magnetic field can be fill.
The value of magnetic field is reduced from a wire, with the distance of the wire.
The magnetic field is inversely proportional to the square of the distance of the current-carrying wire.
Hence, half the distance from a current-carrying wire to the body required to stand, in order for the magnetic field generated by the wire to be half as strong.
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A particle is accelerated uniformly from rest, so that after 10 seconds it has achieved a speed of 15 m/s. Find its acceleration.
Answer:
1.5 m/s²
Explanation:
Applying,
a = (v-u)/t ...................... Equation 1
Where a = acceleration of the particle, v = final velocity of the particle, u = Initial velocity of the particle, t = time.
From the question,
Given: u = 0 m/s (From rest), v = 15 m/s, t = 10 seconds
Substitute these values into equation 1
a = (15-0)/10
a = 15/10
a = 1.5 m/s²
A lamp has a current of 2.0 amperes at 6.0 volts. What is the resistance of lamp?
Answer: B 3.0
Explanation:
Proponer un modelo donde se puedan poner en práctica los conceptos de voltaje y potencia.
Answer: There you go
Explanation:
Choose all the answers that apply.
Kinetic is calculated using _____.
1.mass
2.velocity
3.height above ground
4.gravity
The electric potential 1.34 m from a charge is 580 V. What is the value of the charge? Include the sign, + or -. (The answer is ___ *10^-8 c. Just fill in the number, not the power.)
Answer: 8.6
Explanation:
Answer:
+8.6
Explanation:
acellus
ფიზიკაში მჭირდება დახმარება ნაგლმა მასწავლებელმა მთელი თვე გააცდინა და როცა დაბრუნდა ეგრევე საკონტროლო ისეთი საკითხებით რომელიც არც კი განგვიხილია
Answer:
The photo is blocked cant see anything
Explanation:
Sonar is a device that uses reflected sound waves to measure underwater depths. If a sonar signal has a wavelength of 59 m and the velocity of sound in water is 15,000 m/s, what is the frequency of the signal?
A. 0.0039 Hz
B. 254 Hz
C. 885,000 Hz
the frequency of the signal is
b)254hz
PLS ANSWER QUICK I HAVE A COUPLE MINUTES.
An object moves through space with balanced forces acting on it. Which statement
best describes the speed and direction of the object as long as the forces acting on it
remain balanced?
A. The speed and direction of the object will both change.
B. The speed and direction of the object will remain constanti
C. The speed will change, but the direction will remain constant.
D. The speed will remain constant but the direction will change
Answer:
B
Explanation:
Newton's first law of motion states that every object will continue in a state of rest or uniform motion in a straight line unless a resultant force acts on it
balanced force means resultant force is 0N
this means that the speed will not change as it uniform and the direction will not change because it will continue at the same speed in a statight line and direction
sorry man, I think it was late
hope this helps
The diagram shows a toy car on a number line.
A line with arrowheads at both ends has ticks marks every 2 units. The tick marks for 0, 6, and 10 are labeled. A car sits above the tick mark for 2 with a dashed red line leading to the tick mark.
What is the position of the car?
–4
1
2
4
Answer:
2
Explanation:
The ticks go by 2's and its the first one after 0
Answer:
b
Explanation:
A capacitor has plates of area 5.25 * 10 ^ - 5 * m ^ 2 which are separated by 3.14 * 10 ^ - 6 * m . What is its capacitance?
Answer:
1.47 x 10^-10
Explanation:
Acellus
The capacitance of the given capacitor is approximately 1.4805 × [tex]10^{(-10)[/tex]F.
The capacitance (C) of a capacitor is determined by the formula:
C = (ε₀ ×A) / d
Where:
C is the capacitance
ε₀ is the permittivity of free space (ε₀ ≈ 8.85 × [tex]10^{(-12)[/tex] F/m)
A is the area of the plates
d is the distance between the plates
Given:
Area of the plates (A) = 5.25 × [tex]10^{(-5)[/tex]m²
Distance between the plates (d) = 3.14 × [tex]10^{(-6)[/tex] m
Using the given values, we can calculate the capacitance:
C = (ε₀ ×A) / d
C = (8.85 × [tex]10^{(-12)[/tex] F/m) × (5.25 × [tex]10^{(-5)[/tex] m²) / (3.14 × [tex]10^{(-6)[/tex]m)
Simplifying the expression:
C = (8.85 × 5.25 × [tex]10^{(-12 - 5)[/tex]) / (3.14 × [tex]10^{(-6)[/tex])
C = (46.4625 × [tex]10^{(-17)[/tex]) / (3.14 × [tex]10^{(-6)[/tex])
C = 14.805 × [tex]10^{(-17 - (-6)}[/tex])
C = 14.805 × [tex]10^{(-11)[/tex]
Using scientific notation, capacitance as:
C = 1.4805 × [tex]10^{(-10)[/tex] F
Therefore, the capacitance of the given capacitor is approximately 1.4805 × [tex]10^{(-10)[/tex] F.
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Our best evidence and theoretical calculations indicate that the solar system began with a giant spinning system of gas and dust that scientists call ___________. Group of answer choices
Answer:
Solar nebula.
Explanation:
A planet can be defined as a large celestial body having sufficient mass to allow for self-gravity and make it assume a nearly circular shape (hydrostatic equilibrium), revolves in an orbit around the Sun in the solar system and has a cleared neighborhood.
Basically, the planets are divided into two (2) main categories and these includes;
1. Outer planets: these planets are beyond the asteroid belt and comprises of jupiter, saturn, uranus and neptune, from left to right of the solar system.
2. Inner planets: these planets are the closest to the sun and comprises of mercury, venus, earth and mars.
These outer planets are made mostly of gases (hydrogen and helium) causing them to be less dense than the solid inner planets. These gases are generally known to be less dense in terms of physical properties.
Some examples of the planet found in the solar system are Mars, Venus, Earth, Mercury, Neptune, Jupiter, Saturn, Uranus, Pluto, etc.
Scientists have been able to understand and discover that, gravity pulled materials (low-density cloud of interstellar gas and dust known as a nebula) together forming the planetary bodies in our solar system.
A dark nebula can be defined as an interstellar cloud that is so dense as a result of high concentration of gas and dust and as such it obscures the visible wavelengths of light from stars behind it, thus appearing completely opaque (dark patch) in front of a bright emission nebula or in regions having plenty stars.
The characteristics of a nebulae are;
I. It contain hydrogen.
II. Clouds of gas and dust
III. It is needed to create a star.
A closed-end organ pipe is used to produce a mixture of sounds. The third and fifth harmonics in the mixture have frequencies of 1100 Hz and 1833 Hz respectively. What is the frequency of the first harmonic played by the organ pipe
Answer:
[tex]F_1=366.67Hz[/tex]
Explanation:
From the question we are told that:
Frequency of 3rd harmonics [tex]F_3=1100[/tex]
Frequency of 5th harmonics [tex]F_3=1833[/tex]
Generally the equation for Wavelength at 3rd Harmonics is mathematically given by
[tex]\lambda_3=\frac{4}{3}l[/tex]
Therefore
[tex]F_3=\frac{3v}{4l}[/tex]
Generally the equation for Wavelength at 1st Harmonics is mathematically given by
[tex]\lambda_1=\frac{4}{1}l[/tex]
Therefore
[tex]F_1=\frac{v}{4l}[/tex]
Generally the equation for the frequency of the first harmonic is mathematically given by
[tex]F_1=\frac{F_3}{3}[/tex]
[tex]F_1=\frac{1100}{3}[/tex]
[tex]F_1=366.67Hz[/tex]
should I tell penny, potato chip and used napkin that I've made new friends and moved on. I don't want to make them sad. :(
Answer: ok
Explanation:
A circular loop of flexible iron wire has an initial circumference of 165.0 cm, but its circumference is decreasing at a constant rate of 12.0 cm>s due to a tangential pull on the wire. The loop is in a constant, uniform magnetic field oriented perpendicular to the plane of the loop and with magnitude 0.500 T. (a) Find the emf induced in the
Answer:
emf = - 0.622 V
Explanation:
The electromotive force is given by Faraday's law
emf = [tex]- \frac{d \phi }{dt}[/tex]
Ф = B. A
bold indicates vectors
Ф = B A cos θ
in this case it is indicated that the magnetic field is constant and the angle between the magnetic field and the normal to the area is parallel, so the cos 0 = 1
we substitute
emf = [tex]- B \ \frac{dA}{dt}[/tex]
the area of the circle is
A = pi r²
[tex]\frac{dA}{dt} = \pi 2r \ \frac{dr}{dt}[/tex]
emf = B 2π r [tex]\frac{dr}{dt}[/tex]
speed is defined
v = [tex]\frac{dr}{dt}[/tex]
we substitute
emf = - 2π B r v
let's calculate
emf = - 2π 0.5 1.65 π0.12
emf = - 0.622 V
When Copernicus first systematically created his Sun-centered model of the universe, it did not lead to substantially better predictions of planetary positions than the Ptolemaic model. Why not
Answer:
When Copernicus first systematically created his Sun-centered model of the universe, it did not lead to substantially better predictions of planetary positions than the Ptolemaic model because the Catholic Church, which was the power at the time, stated it was false, and anybody who believed Copernicus and spread the "myth" were excommunicated or even executed. This was because a sun centered universe would mean that everything the Catholic Church had been teaching about how the Earth was the center of the universe would be false. If people believed it, the church would no longer be seen as the infallible authority, so they needed to stop it from spreading.
Two particles experience an attractive electric force of 5 N. If one of the charges triples and
the distance between them doubles, what is the new electric force?
3.75 N
Explanation:
F = k(q)(q)/r^2 = 5 N
F' = k(q)(3q)/(2r)^2
= k×3(q)(q)/4r^2
= (3/4)[k(q)(q)/r^2]
= (3/4)F
= (3/4)(5 N)
= 3.75 N
The new electric force is 3.75 N.
The force on the charges by Coulomb's law is given by;
F = kq1q2/r^2
where q1=q2
F = kq1^2/r^2
Where F = 5N
If one of the charges triples;
q2 = 3q1
distance doubles = r = 2r
F' = 3kq1^2/4r^2
So;
F' = 3/4 F
F' = 3/4 × 5 = 3.75 N
The new electric force is 3.75 N.
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porque los animales tienen un esqueleto diferente -biologia
are u god tell me u have to tell me are u a god
They tell me I'm a god, I'm lost in the facade
Six-feet off the ground at all times, I think I'm feelin' odd
No matter what I make, they never see mistakes
Makin' so much bread, I don't care that they're just being fake
They tell me they're below me, I act like I'm above
The people blend together but I would be lost without their love
Can you heal me? Have I gained too much?
When you become untouchable, you're unable to touch
Is there a real me? Pop the champagne
It hurts me just to think and I don't do pain
Stayin' still, eyes closed
Let the world just pass me by
Pain pills, nice clothes
If I fall, I think I'll fly
Touch me, Midas
Make me part of your design
None to guide us
I feel fear for the very last time.
Force F=5 N acts to the right
Answer:
Calculations involving forces
The resultant force is the single force that has the same effect as two or more forces acting together.
Two forces in the same direction
Two forces that act in the same direction produce a resultant force that is larger than either individual force.
You can easily calculate the resultant force of two forces that act in a straight line in the same direction by adding their sizes together.
Example
Two forces, 3 N and 2 N, act to the right. Calculate the resultant force.
Two arrows, one above the other, both pointing to the right, one labelled 2 N and one labelled 3 N. Then an equals sign and then another arrow to the right labelled 5 N.
Two forces acting in the same direction
Resultant force F = 3 N + 2 N = 5 N to the right.
The resultant force is 5 N to the right.
Two forces in opposite directions
Two forces that act in opposite directions produce a resultant force that is smaller than either individual force.
To find the resultant force subtract the magnitude of the smaller force from the magnitude of the larger force.
The direction of the resultant force is in the same direction as the larger force.
Example
A force of 5 N acts to the right, and a force of 3 N act to the left.
Calculate the resultant force.
Two arrows, one above the other, one pointing to the left, labelled 2 N, the other pointing to the right labelled 3 N. Then an equals sign, with an arrow to the right labelled 1 N.
Two forces acting in opposite directions
Resultant force F
Resultant force F = 5 N - 3 N = 2 N to the right.
The resultant force is 2 N to the right.
Explanation:
Thanks me later
Which of the following is not an example of an abiotic component of an ecosystem
A . water
B . minerals
C . sunlight
D . bacteria
E . air
[tex]\huge{ \mathfrak{ \underline{ Answer \: \: ✓ }}}[/tex]
Which of the following is not an example of an abiotic component of an ecosystem :
A . water
B . minerals
C . sunlight
D . bacteria ✓
E . air
Bacteria is a single celled living organism.
[tex] \#TeeNForeveR[/tex]
D. bacteria is not an example of an abiotic component of an ecosystem.
What is an ecosystem?An ecosystem is a community of living organisms (biotic) interacting with each other and with their non-living (abiotic) environment in a specific area. It encompasses all the living and non-living components of a particular environment and the complex interactions among them.
Here,
Abiotic components are the non-living factors that influence the distribution and abundance of living organisms in an ecosystem. Examples of abiotic components include water, minerals, sunlight, air, and temperature. Bacteria, on the other hand, are living organisms and are considered as biotic components of an ecosystem.
Thus, D. bacteria is not an example of an abiotic component of an ecosystem.
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Blue light and ultraviolet light are both shown upon a surface of sodium and cause the ejection of electrons. Which light will cause the ejected electrons to have a higher kinetic energy
Answer:
ultraviolet light (UV) has more energy than blue light, so electrons must have higher kinetic energy
Explanation:
This is a photoelectric effect exercise, which was explained by Einstein assuming that light is composed of photons and that they interact with electrons as particles.
h f = K + Ф
where fi is the work function of the material
K = hf -Ф
the work function for a given material is constant, therefore let's find the energy of each photon
E = h f
c = λ f
f = c /λ
we substitute
E = h c /λ
Blue light λ = 450 nm = 450 10⁻⁹ m
E = 6.63 10⁻³⁴ 3 10⁸/450 10⁻⁹
E = 4.42 10⁻¹⁹ J
UV light λ = 400 nm = 400 10⁻⁹ m
E = 6.63 10⁻³⁴ 3 10⁸/400 10⁻⁹
E = 4.97 10⁻¹⁹ J
therefore ultraviolet light has more energy than blue light, so electrons must have higher kinetic energy
Can someone help me please??
Which is not true about the role of gravity in the formation of planets?
A. Dust and gas particles that were attracted to each other began to rotate into a protoplanetary disk.
B. Gravity between planetesimals caused them to join together into conglomerate clumps.
C. Our solar system is the only place in the universe where gravity played a key part in the formation of planets.
D. Gravity of larger objects in orbit around the sun attracted, and cleared the orbital path of, smaller planetesimals, gas, and dust.
24. ____
Choose the most accurate description of the dimensions of our solar system:
a. The planets are approximately the same size as each other, and orbit at evenly-spaced distances from the sun.
b. Rocky planets are small, dense, and orbit relatively close to the sun, compared to the Jovian planets, which are large, less dense, and orbiting far from the sun.
c. Rocky planets alternate with gas giants as they orbit at even intervals from the sun
d. Gas planets are small, orbiting relatively close to the sun, while large, dense rocky Giants
orbit the sun at great and varying distances.
25. ____ A new object was discovered in the Kuiper Belt. At 6 billion km from the sun, it could be the newest dwarf planet. How many AU is it from the sun? Use 150,000,000 km as Earth’s orbital distance.
a. 90AU b. 9AU c. 400AU d. 40AU
1. Our solar system is the only place in the universe where gravity played a key part in the formation of planets.
2. Rocky planets are small, dense, and orbit relatively close to the sun, compared to the Jovian planets, which are large, less dense, and orbiting far from the sun.
3. _______
A boat produces a wave as it passes an aluminum can floating in a lake. Explain why the can merely moves up and down while waves propagate away from the disturbance caused by the boat.
Answer:
Due to waves.
Explanation:
The can merely moves up and down because the movement of the waves that propagate away from the disturbance caused by the boat. The Can has low density due to low mass and high volume which allow the can to float on the surface of water after prevent it from the drowning. The wave moves the can up and down but prevent it from going deep inside the water so we can say that the can moves due to movement of waves in water.