Answer:
A plant cell contains a large, singular vacuole that is used for storage and maintaining the shape of the cell. In contrast, animal cells have many, smaller vacuoles. Plant cells have a cell wall, as well as a cell membrane. Animal cells simply have a cell membrane, but no cell wall.
hope this helps :)
Answer:
Compare animal cell and plant cell: Both are eukaryotic cells, both contain membrane bound organelles. Both contain similar membranes such as cytosol and cytosketal elements.
Explanation:
sodium vapor is used in some street lamps. a typical lamp contains 2.00 g of sodium vapor at 31 oc and 1140. torr. what is the volume of the lamp? rA. 0.0438 LB. 1.45 LC. 3.20 LD. 1140 LE. 1.00 L
The supplied statement states that the sodium vapour lamp's volume is 20 LD torr.
What in physics is lamp?From radio waves with wavelengths measured in meters to gamma rays with wavelengths shorter than around 1 1011 meters, electromagnetic radiation occurs throughout a very broad range of wavelengths.
How is a lamp made?Photons are bundles of something like the electromagnetic field which thus contain a set amount of energy and are the building blocks of light. You might count particles or even conduct measurements on something like a single photon using tests that are sensitive enough. Even light has been momentarily frozen by researchers.
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Subject- Science
Grade- 6th
please help me with hw. Thank you!
Answer:
b. they get blown in from colder or warmer areas.
Answer:
Option b.
Hope it helps
Two tugboats pull a disabled supertanker. Each tug exerts a constant force of 2.10×10^6 N
, one at an angle 17.0 ∘
west of north, and the other at an angle 17.0 ∘
east of north, as they pull the tanker a distance 0.630 km
toward the north. What is the total work done by the two tugboats on the supertanker?
Express your answer in joules, to three significant figures.
To pull the tanker 0.630 km total work to be done is 1.871 × 10⁹ Joule.
What is force?The definition of force in physics is: The push or pull on a massed object changes its velocity.
An external force is an agent that has the power to alter the resting or moving condition of a body. It has a direction and a magnitude.
Resultant force acting on the tugboat = √2 × 2.10 × 10⁶ N.
To pull the tanker 0.630 km, that is, 630 m, work done = force × displacement
= √2 × 2.10 × 10⁶ N × 630 m
= 1871004543.01 Joule.
= 1.871 × 10⁹ Joule.
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Bobo the clown carries two red balloons that rub against a circus elephant, causing thr baloons to seperate. Each balloon aquires 1.2x10^-7 of charge. How large is the electric orce between them when the balloons are seperated by a distance of 0.5m
The electric force between the two balloons is approximately 1.04 x \(10^{-12}\) N.
Coulomb's Law:
The electric force between two charged objects can be calculated using Coulomb's Law, which states that the magnitude of the electric force F between two charged objects is directly proportional to the product of their charges (q1 and q2) and inversely proportional to the square of the distance (r) between them:
F = k * (q1 * q2) / r²
where k is the Coulomb constant, which has a value of approximately 9.0 x \(10^{9}\) N*\(m^{2}\)/\(C^{2}\).
In this case, each balloon acquires a charge of 1.2 x \(10^{-7}\) C, so the total charge on both balloons is 2 * 1.2 x \(10^{-7}\)C = 2.4 x \(10^{-7}\)C. The distance between the balloons is 0.5 m.
Plugging in these values into Coulomb's Law, we get:
F = (9.0 x \(10^{9}\) N*\(m^{2}\)/\(C^{2}\)) * [(1.2)²x (\(10^{-7}\) C)²/ (0.5m)²]
Simplifying this expression gives:
F = 1.0368 x \(10^{-12}\) N
Therefore, the electric force between the two balloons is approximately 1.04 x\(10^{-12}\) N.
What is magnitude?
Magnitude refers to the size or extent of something, usually measured in numerical or quantitative terms. It can refer to a physical quantity, such as length, mass, or volume, or it can refer to other measurable attributes, such as brightness, intensity, or force. In general, magnitude is a relative measure, meaning that it is typically expressed as a comparison between two or more things.
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PLEASE HELP 20 POINTS
A car of mass 700 kg and moving at a speed of 30 m/s collides with a stationary truck of mass 1400 kg, and the two vehicles lock together on impact. The combined velocity of the car and truck after the collision is m/s.
1.13 It takes Henry 35s to walk from x=-12m to x=-47. What is his Velocity?
1.13 It takes Henry 35s to walk from x=-12m to x=-47 and Henry's Velocity is 1m/s.
The distance travelled divided by the time passed is the definition of an object's average speed. Average velocity can be calculated as the displacement divided by the time. Velocity is a vector quantity.
velocity of drift. Axial drift velocity is another name for it. At the Fermi velocity, an electron will typically go through a conductor at random. This random motion will experience a minor net flow velocity in one direction as a result of an applied electric field.
Henry's Velocity can be calculated by dividing the distance he walked by the time it took him. The distance he walked is the difference between his initial position x=-12m and final position x=-47m, which is 35m (since -47m - (-12m) = -35m).
So, Henry's Velocity = Distance/Time = 35m/35s = 1 m/s.
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A wave in which the particles of the medium move up and down as the wave passes through is a transverse wave or a
a longitudinal wave
Answer:
transverse waves
Explanation:
this is because the definition of transverse waves is transverse waves are waves that travel perpendicular to the direction of the wave motion
however the definition of longitudinal waves is that longitudinal waves are waves that travel parallel to the direction of the wave motion.
so you can see the parallel means it forms compressions and rarefactions
but perpendicular means the particles will move up and down to the straight horizontal line, that's how lines are perpendicular right? ,
so the answer is transverse wave
hope this helps
please mark it brainliest
"Why do we refer to light as a wave?" Give at least THREE evidence statements that
indicate light is a wave.
Pls help
Solar-powered cars use energy from the Sun to work. A panel on the car absorbs light energy from the Sun, which
then generates an electric current. This electric current, in turn, allows the car to move. Which shows the correct
order of energy transformations that take place in a solar-powered car?
electrical, chemical, kinetic
electrical, kinetic, radiant
radiant, chemical, electrical
radiant, electrical, mechanical
Answer: I Believe Its radiant, electrical, mechanical!
Explanation:
Please correct me if i'm wrong!
Answer:
D) radiant, electrical, mechanical Is correct!
Explanation:
Hope this helps! :)
A pirate’s map has you traveling 8 m N and 10 m W. It takes you 22 seconds to complete the distance. What is your speed?
A potato launcher uses a spring that can apply a force of 20N to potato’s. He launched a 150 gram potato, what is the acceleration? Then he launched a 200gram potato what is the acceleration? I WILL GIVE BRAINIEST PLZZZZ HELP
Answer:
.
Explanation:
A lightbulb uses 2,000 J of energy in 1 min and 20 s. What is the power of the lightbulb?
Answer:
ga tau gw ah binatang aje
the λmax of s157c at ph 4.5 is greater than at ph 10. how does the proposed bonding of deprotonated c157 with y63 at ph 10 account for this observation?
The λmax of S157C at pH 4.5 is greater than at pH 10 due to the proposed bonding of deprotonated C157 with Y63 at pH 10.
At pH 4.5, the side chain of C157 is protonated, which means that it carries a positive charge. This protonated form of C157 is less likely to form a bond with Y63, resulting in a higher λmax value.
On the other hand, at pH 10, the side chain of C157 is deprotonated, meaning it loses a proton and becomes uncharged. In this state, the deprotonated C157 is more likely to form a bond with Y63. This bonding affects the electronic environment and results in a lower λmax value compared to the value at pH 4.5.
In summary, the proposed bonding of deprotonated C157 with Y63 at pH 10 accounts for the observation that the λmax of S157C at pH 4.5 is greater than at pH 10 because the bonding alters the electronic environment, leading to a lower λmax value at the higher p H.
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5 Select the correct answer. Which statement is true? OA. The speed of sound in air is inversely proportional to the temperature of the air. O B. The speed of sound in air is directly proportional to the temperature of the air. OC. The speed of sound in air is twice the temperature of the air. C D The speed of sound in air is not affected by the temperature of the air.
The speed of sound in air is twice the temperature of the air
Answer: The speed of sound in air is twice the temperature of the air
Explanation:
Scientists use the micron as a unit of length for very
small objects. A micron is one-millionth of a meter, or
0.000001 m. Write the number of meters in a micron in
scientific notation.
Answer:
1 micron = 1.00E-6 m is one way
1.00^-6 m is another but is not usually considered scientific notation, but
often convenient to use.
Scientists use the micron as a unit of length for very small objects. A micron is one-millionth of a meter or 0.000001 m, then the number of meters in a micron in scientific notation would be 1×10⁻⁶ meters.
What are significant figures?In positional notation, significant figures refer to the digits in a number that is trustworthy and required to denote the amount of something, also known as the significant digits, precision, or resolution.
If a number expressing the result of a measurement includes more digits than the number of digits allowed by the measurement resolution, only the digits allowed by the measurement resolution can be significant figures.
As given in the problem Scientists use the micron as a unit of length for very small objects. A micron is one-millionth of a meter or 0.000001 m.
1 micron = 0.000001 m
=1×10⁻⁶ meters
Thus, the number of meters in a micron in scientific notation would be 1×10⁻⁶ meters.
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2. A 9.6 kg object is pulled along a horizontal surface. If the coefficient of friction between the surfaces is 0.11, what is the force of friction?
The force of friction is 10.36 N. Friction is an important concept in physics and plays a crucial role in various phenomena, such as walking, driving, and the operation of machines.
What is Frictions?
Friction is a force that opposes motion between two surfaces that are in contact with each other. It arises due to the roughness of the surfaces and the interlocking of the irregularities on the surfaces. Friction acts in a direction opposite to the direction of motion or the tendency of motion.
The force of friction can be calculated using the formula:
f = μN
where:
f = force of friction
μ = coefficient of friction
N = normal force (the force perpendicular to the surface)
In this case, we are given the coefficient of friction and the mass of the object, but we need to find the normal force. Since the object is being pulled horizontally, the normal force is equal to the weight of the object:
N = mg
where:
m = mass of the object
g = acceleration due to gravity (9.81 m/s^2)
N = (9.6 kg)(9.81 m/s^2) = 94.18 N
Now we can calculate the force of friction:
f = μN = (0.11)(94.18 N) = 10.36 N
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a truck with a mass of 2400 travels at a constant speed of 90 km/hr. what average force would be required to stop the truck in 8 seconds?
We need a force of 7500 in the opposite direction of the motion of the truck.
According to the first equation of motion
V= U + a t
t = time taken
V= final velocity =0 (as truck will come to rest)
U = initial velocity = 90 km/hr = 25 m/sec
a = acceleration
a= V- U / t
a = 0- 25 / 8
a = - 3.125 m/\(sec^{2}\)
According newtons second law
F= m a
F = 2400 (- 3.125 m/\(sec^{2}\))
F= - 7500 Newton
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Compared to the inertia of a 1-kilogram mass, the inertia of a 4-kilogram mass is
Explanation:
The inertia of a 4 kg mass is four times as great as a 1 kg mass.
A 8,500 kg. railroad car traveling at a velocity of 12m/s strikes a second boxcar at rest. If the two cars stick together and move off with a velocity of 8m/s, what is the mass of the second car
The mass of the railroad car is 8,500 kg and its velocity before the impact is 12 m/s. It collides with another boxcar, which is at rest. Both cars stick together and move off with a velocity of 8 m/s. The mass of the second boxcar is 5000 kg.
Let us solve for the mass of the second boxcar.
Using the law of conservation of momentum, the total momentum of the system before the collision is equal to the total momentum of the system after the collision.
momentum before = momentum after
M1V1 + M2V2 = (M1 + M2)V1.
(12) + (0) = (8,500 + M2) (8)
M2 = (12 + 0 - 8,500 * 8) / (-8)
M2 = 5,000 kg
Therefore, the mass of the second boxcar is 5,000 kg.
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A physics student stands at the top of a set of bleachers. They drop a basketball and it lands 2.4 seconds later.
d.) How high are the bleachers ?
e.) How fast was the basketball traveling at the time it landed ?
Answer:
x=48.12 m
Vf=23.544 m/s
Explanation:
a=g
t=2.4
Vf=?
Vø=0
Vf=Vø+at
Vf=0+(9.81)(2.4)=23.544
x=Xø+Vøt+1/2at^2
x=1/2at^2
x=(1/2)(9.81)^2=48.11805
A ball is dropped from an upper floor, some unknown distance above Tom's apartment. As he looks out of his window, which is 1.10 m tall, Tom observes that it takes the ball 0.190 s to traverse the length of the window. Determine how high ℎ above the top of Tom's window the ball was dropped. Ignore the effects of air resistance.
Answer:
The height is 1.20 m above the window.
Explanation:
Given that,
Height of window = 1.10 m
Time = 0.190 sec
We need to calculate the velocity
Using equation of motion
\(s=ut+\dfrac{1}{2}gt^2\)
Put the value into the formula
\(1.10=u\times0.190+\dfrac{1}{2}\times9.8\times(0.190)^2\)
\(1.10=u\times0.190+0.17689\)
\(u=\dfrac{1.10-0.17689}{0.190}\)
\(u=4.85\ m/s\)
We need to calculate the height
Using equation of motion
\(v^2=u^2+2gh\)
Put the value into the formula
\((4.85)^2=0+2\times9.8\times h\)
\(h=\dfrac{(4.85)^2}{2\times9.8}\)
\(h=1.20\ m\)
Hence, The height is 1.20 m above the window.
The velocity of a car increases from +2.0 m/s to +16.0 m/s in a time period of 3.5 s. What was the average acceleration?
Answer:
The average acceleration is \(4\ m/s^2\)
Explanation:
Motion With Constant Acceleration
It's a type of motion in which the velocity of an object changes uniformly in time. If only the magnitudes are considered, then the equation that describes the change of speeds is:
\(v_f=v_o+at\)
Where:
a = acceleration
vo = initial speed
vf = final speed
t = time
The velocity (magnitude or speed) of a car increases from v0=2 m/s to vf=16 m/s in t=3.5 s. We can calculate the acceleration by solving for a:
\(\displaystyle a=\frac{v_f-v_o}{t}\)
\(\displaystyle a=\frac{16-2}{3.5}\)
\(\displaystyle a=\frac{14}{3.5}\)
\(\boxed{a = 4\ m/s^2}\)
The average acceleration is \(4\ m/s^2\)
a standby generator is connected to fifteen 40w and a musical 600w amplifying system. how many energy is used up if the generator run 6hours
pls someone answer the question fast
Answer:
1200 watts
-hope this helps
David is a stock clerk in the supermarket. David does only what he is told to do—no more and no less. Does David have a good attitude toward work? EXPLAIN
if you flew a spaceship straight into jupiter, aiming toward jupiter's center, the spaceship would ________.
If you flew a spaceship straight into Jupiter, aiming toward its center, the spaceship would experience increasing atmospheric pressure, temperature, and density as it descends. Initially, the spacecraft would encounter the outer layers of Jupiter's atmosphere, which is primarily composed of hydrogen and helium. As it progresses further, it would experience more intense pressure, leading to the hydrogen gas transitioning into a liquid state.
Eventually, the spacecraft would reach a layer where metallic hydrogen is present, which is due to the extremely high pressure and temperature conditions deep within Jupiter's interior. The intense conditions in this region would likely cause the spacecraft to be crushed and destroyed by the immense pressure and heat.
Throughout the descent, the spacecraft would also encounter strong winds and powerful storms, such as the Great Red Spot, which could further challenge its integrity and ability to withstand Jupiter's harsh environment. Overall, the spaceship's journey into Jupiter would be a perilous one, and it would ultimately be destroyed by the planet's extreme conditions.
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How did Edwin Hubble's discovery that the Andromeda Nebula was at least 1 million light years away change scientists' view of the universe?.
After years of observation, Hubble made an extraordinary discovery. In 1923 he spotted a Cepheid variable star in what was known as the Andromeda Nebula. Using Leavitt's techniques, he was able to show that Andromeda was nearly 1 million light years away and clearly a galaxy in its own right, not a gas cloud.
Please help ASAP
у.
B
C
Position (m)
A А
0
1
2
3
4
5
6
7
8
9
10
11
12
Time (s)
The graph describes the motion of an object.
The object moves with
from A to B. It
from B to C. It moves
from C to D.
Answer:
a10
Explanation:
Una rueda gira con una frecuencia de 530 rpm. Determina la velocidad angular, el periodo y la frecuencia.
Answer:
donde esta la bibliotekaaa
Explanation:
dfghj
Por definición de velocidad angular, periodo y frecuencia del M.C.U., la frecuencia, la velocidad angular y el periodo de la rueda son 8.833 Hz, 55.50 rad/s y 0.113 segundos respectivamente.
Movimiento Circular UniformeEl movimiento circular uniforme (M.C.U.) es un movimiento de trayectoria circular en el que la velocidad angular es constante. Esto implica que describe ángulos iguales en tiempos iguales.
En otras palabras, el M.C.U. describe el movimiento de un cuerpo con una rapidez constante y una trayectoria circular, cambiando en cada instante de dirección.
FrecuenciaLa frecuencia mide el número de revoluciones o vueltas completadas por unidad de tiempo. La frecuencia se expresa en s⁻¹ o Hertz (Hz).
Se define como:
f= ω÷ (2π) siendo ω la velocidad angular.
PeriodoEl periodo (T) es el tiempo que el cuerpo emplea en dar una vuelta completa; es decir que las características del movimiento son las mismas cada T segundos.
Se define como:
T= (2π)÷ ω siendo ω la velocidad angular.T= 1÷ f siendo f la frecuencia.Velocidad angular, periodo y frecuencia de una ruedaUna rueda gira con una frecuencia de 530 rpm. Expresada en las unidades correspondientes, la frecuencia de la rueda es:
f = 530rpm×\(\frac{1 min}{60 segundos}\)
f = 8.833 Hz
Siendo la frecuencia f= ω÷ (2π), entonces la velocidad angular es calculada como:
ω= f× (2π)
Entonces, la velocidad angular de la rueda es:
ω= 8.833 Hz× (2π)
ω= 55.50 rad/s
Finalmente, por definición de periodo, el periodo de la rueda es:
T= 1÷ 8.833 Hz
T=0.113 segundos
En resumen, la frecuencia, la velocidad angular y el periodo de la rueda son 8.833 Hz, 55.50 rad/s y 0.113 segundos respectivamente.
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Could somebody pls help me out with this?
1) You serve a Volleyball with a mass of 1.6kg. the ball leaves your hand with a speed of 25m/s. the ball has________energy. Calculate it.
2) Askateboard is sitting at the top of a hill that is 26m high. the skateboard weighs 2 N. the skateboard has _____energy. Calculate it.
Why do covalent compounds have low melting and boiling points?
A
Weak VanderWaals force of attraction between molecules.
B
Strong VanderWaals force of attraction between molecules.
C
Large amount of energy required to break the force of attraction.
D
None of the above
The correct option is c. Covalent compounds have low melting and boiling points due to the large amount of energy required to break the force of attraction.
What is a covalent compound?A covalent compound is a chemical complex that is bound together by covalent bonds. These compounds are made up of two or more atoms of the same or different elements that share electrons. Water (\(H_{2} O\)), carbon dioxide (\(CO_{2}\)), methane (\(CH_{4}\)), and ammonia are examples of covalent molecules (\(NH_{3}\)).
Because of the modest Vander Waals force of attraction between molecules, covalent compounds have low melting and boiling points. As a result, just a little amount of energy is required to break the force of attraction and separate the molecules, resulting in a low melting and boiling point.
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