Answer:
Mitochondria and chloroplast are organelles found in a plant cell. However, chloroplast is absent in an animal but mitochondria is found in both. Mitochondria generates energy for the cell in the form of ATP using oxygen and nutrients. Chloroplast is the site for photosynthesis in a plant cell.
How does surface type affect speed?
Answer:
Slick and smooth surfaces mediate friction to a low, allowing an object to speed across it with low resistance.
Explanation:
HELPP
You are given two particles, each with a positive charge,
and a box that is 1 m by 1 m. How would you arrange the
particles to create the weakest electric force between
them? Explain.
Answer:
they are like charges so they magnitude repulsive & direction will be ones left &ones right. but it depends on the axis of rotation.
You are given two particles, each with a positive charge, and a box that is 1 m by 1 m. To arrange the particles to create the weakest electric force between them i put at opposite direction diagonally.
What is force?A force is an effect that can alter an object's motion according to physics. An object with mass can change its velocity, or accelerate, as a result of a force. An obvious way to describe force is as a push or a pull. A force is a vector quantity since it has both magnitude and direction.
According to Coulomb's law, the force of attraction or repulsion between two charged bodies is directly proportional to the product of their charges and inversely proportional to the square of the distance between them.
To arrange the particles to create the weakest electric force between them i put at opposite direction diagonally.
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A bus is traveling at 25 m/s, and a cyclist is traveling at 5 m/s behind the bus, in the same direction. the frequency of a sound coming from the bus is observed by the cyclist to be 1000 hz. approximately what is the frequency of the sound as perceived by the bus driver
Answer:
Approximately [tex]1061\; {\rm Hz}[/tex] (rounded to the nearest whole number,) assuming that the speed of sound in the air is [tex]330\; {\rm m \cdot s^{-1}}[/tex].
Explanation:
Let [tex]v[/tex] denote the speed of this sound wave: [tex]v = 330\; {\rm m\cdot s^{-1}}[/tex] by assumption.
Let [tex]\Delta v[/tex] denote the speed at which the source (the bus) moves away from the observer (the cyclist.) In this question, [tex]\Delta v = 25\; {\rm m\cdot s^{-1}} - 5\; {\rm m\cdot s^{-1}} = 20\; {\rm m\cdot s^{-1}}[/tex].
Let [tex]d[/tex] denote the distance between the source (the bus) and the observer (the cyclist) when the first crest leaves the source. At a speed of [tex]v[/tex], it would take [tex]d / v[/tex] before the first crest arrive at the observer.
Let [tex]T[/tex] denote the period of this wave. If a crest of this wave leaves the source at [tex]t = 0[/tex], the very next one would leave at [tex]t = T[/tex]. Since the source is moving away from the observer at [tex]\Delta v[/tex], the distance between the two would have since increased from [tex]d[/tex] to [tex](d + \Delta v\times T)[/tex]. At a speed of [tex]v[/tex], this crest would now need [tex](d + \Delta v\times T) / v[/tex] to reach the observer.
In summary:
The first crest leaves the source at [tex]t = 0[/tex] and arrives at the observer at [tex]t = d / v[/tex].The second crest leaves the source at [tex]t = T[/tex] and arrives at the observer at [tex]t = T + (d + \Delta v\times T) / v[/tex].The time difference between the two crests is [tex]T[/tex] at the source. However, at the observer, this difference would have become:
[tex]\begin{aligned} &T + \frac{d + \Delta v\times T}{v} - \frac{d}{v} \\ =\; & T + \frac{\Delta v\times T}{v} \\ =\; & T\times \frac{v + \Delta v}{v}\end{aligned}[/tex].
Therefore, the ratio between the period at the source and at the observer would be:
[tex]\begin{aligned}\frac{T(\text{observer})}{T(\text{source})} &= \frac{\displaystyle T \times \frac{v + \Delta v}{v}}{T} \\ &= \frac{v + \Delta v}{v}\end{aligned}[/tex].
The frequency [tex]f[/tex] of a wave is equal to the reciprocal of its period [tex]T[/tex]. In other words, [tex]f = (1 / T)[/tex]. Therefore:
[tex]\begin{aligned}\frac{f(\text{observer})}{f(\text{source})} &= \frac{T(\text{source})}{T(\text{observer})} \\ &= \frac{v}{v + \Delta v}\end{aligned}[/tex].
Since [tex]f(\text{observer}) = 1000\; {\rm Hz}[/tex], [tex]\Delta v = 20\; {\rm m\cdot s^{-1}}[/tex], and [tex]v = 330\; {\rm m\cdot s^{-1}[/tex] by assumption:
[tex]\begin{aligned} & f(\text{source})\\ =\; & f(\text{observer}) \times \frac{v + \Delta v}{v} \\ =\; & 1000\; {\rm m\cdot s^{-1}} \times \frac{330\; {\rm m\cdot s^{-1}} + 30\; {\rm m\cdot s^{-1}}}{330\; {\rm m\cdot s^{-1}}} \\ \approx\; & 1061\; {\rm m\cdot s^{-1}}\end{aligned}[/tex].
Look at the incomplete balanced equation shown below. What three numbers would replace X, Y and Z in the equation? Give the numbers in order (for example: 2 6 3).
Answer:
3,6,9 is the answer it might be right but not sure
The balanced equation is C[tex]_3[/tex]H[tex]_8[/tex] + 5O[tex]_2[/tex] → 3CO[tex]_2[/tex] + 4H[tex]_2[/tex]O. An imbalanced chemical equation describes the products and reactants of a chemical process.
What is balanced equation?The balanced equation is indeed a chemical reaction equation in which the overall charge and the quantity of atoms for every element inside the reaction are identical for both the products and the reactants. In other terms, the mass plus charge on both side of the reaction are balanced.
An imbalanced chemical equation describes the products and reactants of a chemical process but does not include the quantities needed to meet mass conservation.
The carbon atom on lefts side is 3 while on right side it is 1
C[tex]_3[/tex]H[tex]_8[/tex] + O[tex]_2[/tex] → 3CO[tex]_2[/tex] + H[tex]_2[/tex]O
now balance oxygen
C[tex]_3[/tex]H[tex]_8[/tex] + 5O[tex]_2[/tex] → 3CO[tex]_2[/tex] + 4H[tex]_2[/tex]O
Therefore, the balanced equation is C[tex]_3[/tex]H[tex]_8[/tex] + 5O[tex]_2[/tex] → 3CO[tex]_2[/tex] + 4H[tex]_2[/tex]O.
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(b) Fig. 7. 2 shows a metal sphere on an insulating support.
C
Fig. 7. 2
A student has available two rods, one charged positively and one charged negatively. Using
one of these rods, she gives the sphere a uniform negative charge by induction
State which rod she chooses, and describe the procedure she follows.
The rod she chooses, to give the sphere a uniform negative charge by induction is the positively charged rod.
Charging by inductionCharging an object by induction is a process of inducing a charge on the object by bringing another charged object close to it.
Charge on the sphereWhen a positively charged rod is brought near a neutral sphere (equal negative and positive charge), the positive charge of the rod will repel the positive charge of the sphere, leaving the sphere with excess negative charge.
Thus, the rod she chooses, to give the sphere a uniform negative charge by induction is the positively charged rod.
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a huge rock out of skateboard gets so hard during the day they can't sit on it from ______.
1) convection
2) conduction
3) radiation
Answer:
2 conduction
Explanation:
Answer:
2) conduction
Explanation:
They can't sit on it due to the heat that is felt as soon as a person comes in contact with itThis is commonly known as "conduction"A cart with mass 2m has a velocity v before it strikes another cart of mass 3m at rest. The two carts couple and move off together with a velocity of?
Answer:
2/5 v
Explanation:
Use conservation of momentum
originally mv = 2m v
after the crash mv is still the same (2mv)
but the mass is now 5m x where x is the new velocity
2mv = 5 mx
x = 2/5 v
The momentum of two objects in a collision is conserved. Hence, the total initial momentum is equal to the final momentum of the coupled mass. Here the final velocity will then be 2/5 v.
What is momentum ?Momentum of a moving object is the product of mass and velocity. It is a vector quantity with direction and magnitude. The total momentum of two colliding bodies is equal to the total final momentum after collision.
Let m1 and m2 be the masses and v1 and v2 be the final velocities. Vt be the velocity of the coupled mass.
Then, m1 v1 + m2 v2 = (m1 + m2) Vt
Given, mass of cart 1 = 2m
cart 2 = 3m
velocity of cart 1 = v
cart = 0 since it was at rest.
Then, 2m v + 0 = (2m + 3m) Vt
Vt = 2/5 v
Therefore, the final velocity of the couple of carts will be 2/5 v.
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A bicycle has a front gear that is turned by a pedal and is connected by a chain to a
rear gear, which turns the rear wheel. If the pedal radius is 18.0 cm, the front gear
radius is 9.0 cm, the rear gear radius is 4.0 cm, and the rear wheel radius is 33.0
cm, what is the ideal mechanical advantage of the bicycle?
(A) 0.24
(B) 0.48
(C) 0.55
(D) 0.82
Answer:
Pedal / Front Gear = 18 / 9 = 2
Front Gear /Rear Gear = 9 / 4 = 2 1/4
Rear Gear / Wheel = 4 / 33 = .121
2 * 2 1/4 * .121 = ,55
C) Seems true
Determine if the data are qualitative or quantitative.
Answer:
Qualitative, Quantitative, Qualitative, Quantitative, and Qualitative.
Explanation:
[tex]\qquad\qquad\huge\underline{{\sf Answer}}♨[/tex]
Here we go ~
❖ Qualitative data determines the property or characteristics of certain object or behavior.
❖ Quantitative data determines the number or quantity of a substance. basically dealing with how much/many things are being used.
Now let's move on to questions ~
#1. Carbon is a organic molecule.
- Qualitative
#2. The forest is 25% oak trees.
- Quantitative
#3. Water contains covalent bonds.
- Qualitative
#4. Sheila's blood pressure is 120/80.
- Quantitative
#5. The bat arm and human arm have similar bone structure
- Qualitative
differentiate between beam and physical balance
Answer:
Physical Balance
•Physical balance are utilized for precision mass measurement.
•Physical balance can measure accurately upto a milligram.
Beam balance
•Beam consists of a horizontal beam, supported at it's centre.
•The object is kept on one pan and the standard massess in the other.
Explanation:
mark me brainliest
What does the quote means? And do you agree or disagree and if you could change it what would you say?
What separates the two sections of the solar system?.
Answer:
These two groups of planets are separated by the asteroid belt, a disk of small rocky bodies orbiting the sun between Mars and Jupiter.
Explanation:
Your welcome!
Radiant energy, capable of traveling through space is called.
Answer:
Electromagnetic Radiation
Explanation:
A 50 kg mass is sitting on a frictionless surface. an unknown constant force pushes the mass for 2 seconds until the mass reaches a velocity of 3 m/s.
a) what is the initial momentum of the mass?
b) what is the final momentum of the mass?
c) what was the force acting on the mass?
d) what was the impulse acting on the mass?
Answer:
Initial momentum: [tex]0\; {\rm kg \cdot m \cdot s^{-1}}[/tex].
Final momentum: [tex]150\; {\rm kg \cdot m\cdot s^{-1}}[/tex].
Force on the mass (assuming that the force is constant): [tex]75\; {\rm N}[/tex].
Impulse on the mass: [tex]150\; {\rm kg \cdot m \cdot s^{-1}}[/tex].
Explanation:
The momentum [tex]p[/tex] of an object is equal to the product of mass [tex]m[/tex] and velocity (a vector) [tex]v[/tex].
The initial momentum of this mass was [tex]0\; {\rm kg \cdot m \cdot s^{-1}}[/tex] since the velocity of this object was initially [tex]0\; {\rm m\cdot s^{-1}}[/tex].
At [tex]v = 3\; {\rm m\cdot s^{-1}}[/tex], the momentum of this mass ([tex]m = 50\; {\rm kg}[/tex]) would be:
[tex]\begin{aligned}p &= m\, v \\ &= 50\; {\rm kg} \times 3\; {\rm m\cdot s^{-1}} \\ &= 150\; {\rm kg \cdot m \cdot s^{-1}}\end{aligned}[/tex].
Assume that the external force [tex]F[/tex] on this mass is constant. By Newton's Second Law of motion, the external force on this mass would be equal to the rate of change in the momentum of this mass.
Since the momentum of this mass increased by [tex]\Delta v = 150\; {\rm kg \cdot m \cdot s^{-1}}[/tex] in [tex]\Delta t = 2\; {\rm s}[/tex], the external force on this mass would be:
[tex]\begin{aligned}F &= \frac{\Delta v}{\Delta t} \\ &= \frac{150\; {\rm kg \cdot m \cdot s^{-1}}}{2\; {\rm s}} \\ &= 75\; {\rm kg \cdot m \cdot s^{-2}} \\ &= 75\; {\rm N}\end{aligned}[/tex].
The impulse of an external force on an object is equal to the change in the momentum of that object. Since the change in momentum of this mass was [tex]\Delta v = 150\; {\rm kg \cdot m \cdot s^{-1}}[/tex], the corresponding impulse would also be [tex]150\; {\rm kg \cdot m\cdot s^{-1}}[/tex]:
[tex]\begin{aligned}J &= \Delta v \\ &= 150\; {\rm kg \cdot m\cdot s^{-1}} \\ &= 150\; {\rm N \cdot s}\end{aligned}[/tex].
16. Pressure of a fluid depends upon:
a) Height of the object
b) Depth at which object moves
c) density of the medium
d) all of above
Answer:
b that is density at object moves
Challenge question: An arrow is placed at 3 centimeters to the left of a converging lens. The image appears at 3 centimeters to the right of the lens. What is the focal length of this lens? (HINT: Place a dot to the right of the lens where the image of the tip of the arrow will appear. You will only be able to draw lines 1 and 2. Where does line 1 cross the principal axis if the image appears at 3 centimeters?)
The focal length of the converging lens based on the arrow placed 3 centimeters to the left and the imaged formed 3 cm to the right is 1.5 cm.
Focal length of the converging lensThe focal length of the converging lens is determined by applying the following converging lens formula.
1/f = 1/v + 1/u
where;
v is the image distance = 3 cmu is the object distance = 3 cmf is the focal length = ?1/f = 1/3 + 1/3
1/f = 2/3
f = 3/2
f = 1.5 cm
Thus, the focal length of the converging lens is 1.5 cm.
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Can someone please answer my question?
What is one way plate tectonics causes change on earth?
Answer: Tectonic processes cause the movement of land and earthquakes. This heat drives plate tectonics and parts of the rock cycle. Where humans can live can be affected by volcanic events, sea level rise, and earthquakes, all of which are related to tectonic processes.
hope it helps!:)
the placement of the Sun, the Moon, and Earth in each circumstance is
Answer:
Tides and Water Levels
Explanation:
When the sun, moon, and Earth are in alignment (at the time of the new or full moon), the solar tide has an additive effect on the lunar tide, creating extra-high high tides, and very low, low tides—both commonly called spring tides
:)
Not all metals have the same current for a given electric potential
The statement 'Not all metals have the same current for a given electric potential' is TRUE. It is conductivity.
What is conductivity?All the metals are able to conduct electric currents, but some metals have a higher conductivity.
Metals are able to conduct electric currents due to the free movement of negatively charged particles i.e., electrons, across the conductor.
The band theory of metals states that metals can conduct electrons (e-) in an electric current by means of the help of the e- valence.
The density of free electrons in metals is around 10^28 m-3, which indicates the number of states at a particular energy level that negative e- can occupy.
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You push a 25.0kg wooden box across a wooden floor at a constant speed of 1.0m/s . the coefficient of kinetic friction is 0.20 . how large is the force that you exert on the box?
For a 25.0kg wooden box across a wooden floor at a constant speed of 1.0m/s, The force is mathematically given as
F=49N
What is the force that you exert on the box?Generally, the equation for the Force is mathematically given as
F=uN
Therefore
F=25*9.8*0.20
F=49N
In conclusion, the force is
F=49N
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hello people ~
Both chasmogamous and cleistogamous flowers are present in
(a) Helianthus
(b) Commelina
(c) Rosa
(d) Gossypium
(b) Commelina
Explanation:
Both chasmogamous and cleistogamous are present in Commelina.
In commelina, the flowers have anthers and stigma hanging outside of the flower. Petals are colourful and contains scent and nectars to attract birds and insects. Both of these are present in commelina flowers.
Answer:
Commelina
Explanation:
Commelina is type of flower at where the stings and anthers remains hanging outside of the flower.To get help in pollination they used to attract insects by their scentsA student makes a voltage divider from a 45-V battery, a 475-k
resistor, and a 235-k resistor. The output is measured across the
smaller resistor. What is the voltage?
Answer:
14.9 v
Explanation:
V = IR
The voltages across the resistors will be proprtional to the values of the resistors
45 * 235 / (235 + 475) =
Our earth is situated in the milky way galaxy. The milky way galaxy is which type of galaxy?.
Answer:
Our earth is situated in the Milky Way galaxy. The Milky Way galaxy is a type of spiral galaxy.
Explanation:
spiral galaxy
The Milky Way is a huge collection of stars, dust and gas. It's called a spiral galaxy because if you could view it from the top or bottom, it would look like a spinning pinwheel. The Sun is located on one of the spiral arms, about 25,000 light-years away from the center of the galaxy.
What is the velocity of a wave with a frequency of 200 Hz and a wavelength of 5 m?
Answer:
5
Explanation:
because you do math and like, yeah
8.
A microscopic view of a sheet of paper is shown in the diagram at the
right. Would you expect this sheet of paper to cause light to undergo
regular or diffuse reflection?
Explain.
9.
From what type of surface do you think it would be easier to read?
From pages, which are rough, or from pages which are smooth and
glossy?
Explain your answer.
A microscopic view
of a sheet of paper.
10. Driving at night offers a great example of diffuse vs. regular reflection. A dry road is a diffuse
reflector, while a wet road is not. On the diagrams below, sketch the reflected light off a wet and dry
surface.
Dry Surface
Wet Surface
Why would the wet road appear to the driver to be darker than the dry road?
11. The diagram below contrasts the reflection of light off a smooth surface (left) with the reflection of
light off a rough surface (right). Compare the two diagrams and explain why the reflected rays for a
rough surface do not result in the formation of an image.
Based on the nature of reflection of light from surfaces, smooth surfaces produce regular reflection while rough surfaces produce diffuse reflection.
What is reflection of light waves?Reflection of light waves refers tobtye bouncing back of light waves when they hit a shiny surface.
Depending on the nature of the surface, reflection of light waves can either be regular if diffuse.
Smooth surfaces produce regular reflection while rough surfaces produce diffuse reflection.
Based on the properties of reflection:
A microscopic view of a sheet of paper shows that the surface is rough, thus it would produce diffuse reflection. Rough pages are easier to read from than smooth and glossy surfaces because they produce diffuse reflection while reading off smooth surface causes a glare due to intense regular reflectionA wet road appears darker because more light passes through and it reflects less light and looks darkerdiffuse reflection do not all pass through the principal focus, thus an image is not formed off a rough surfaceTherefore, it can be concluded that the rough surfaces produce diffuse reflection while smooth and glossy surfaces produce regular reflection.
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An astronaut floating alone in outer space throws a baseball. If the ball moves away at 20 m/s, the astronaut will:.
Answer:
Move the opposite direction ( at a lesser magnitude of velocity)
Explanation:
Which statement describes the movement of water when a cell shrinks and shrivels due to osmosis?
Answer:
Water went out of the cell because the concentration of water inside the cell was higher than the concentration outside the cell describes the movement of water when a cell shrinks and shrivels due to [ osmosis. Expert answered|emdjay23|Points 175268| Log in for more information.
Explanation:
Water went out of the cell because the concentration of water inside the cell was higher than the concentration outside the cell.
when there is a higher concentration of water inside the cell, water will begin to move out of the cell, eventually creating a hypertonic solution in which the cell shrivels and shrinks.
Think about the physical activities that you have done as a part of this course. Describe a time during one activity in which a competitor displayed good sportsmanship toward you.
The activity in which a competitor displayed good sportsmanship towards me was during a football match.
What is Sportsmanship?This is an ethics or attitudes that show respect for the rules of a game and for the other players.
Sportsmanship was shown when i lost the deciding penalty and was consoled by the opponent.
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Which magnet would be best for lifting heavy metal, moving it,and letting go of it
Savannah was swimming in a river. She swam downstream at a constant velocity for 10.0minutes. She swam 232meters in that time. What was her velocity?
I think it is 23.2, sorry if I'm wrong
