Heat and temperature are not the same. Heat is the transfer of thermal energy from one object to another as a result of the difference in temperature. Temperature measures how cold or hot an object feels. Temperature is measured in degrees celsius while heat is measured in Joules.
The freezer possesses a lower temperature. The environment of the freezer possesses a lower temperature. The hot pan has a higher temperature and the heat is transferred from the hot pan to the freezer environment. The heat transfer continues until the two systems have reached thermal equilibrium and are at the same temperature.
In other words, there is a flow of energy from the higher temperature object(hot pan) to a lower temperature object(freezer) until thermal equilibrium is attained. The energy flows to balance the system
Why do objects have specific colors?
Answer:
The color of an object is the wavelength of light that it reflects.
1 If electromagnetic radiation acted like particles in the double-slit experiment, what would be observed?
a The screen would remain dark because no radiation would reach the screen.
b One bright band would appear in the center of the screen.
c A series of light and dark bands would appear on the screen.
d Two bright bands would appear on the screen in line with the slits.
2 Which statement about the interference behavior of electromagnetic radiation seen in the double-slit test experiment is true?
a Waves that make up the radiation collide with each other so that they add together or cancel each other out.
b Particles that make up the radiation collide with each other and scatter randomly.
c Particles that make up the radiation collide with each other so that they add together or cancel each other out.
d Waves that make up the radiation do not interact with each other.
3 Which statement about the observed results of the double-slit experiment is true?
a Waves that are out of phase constructively interfere to create bright bands.
b Waves that are in phase destructively interfere to create bright bands.
c Waves that are out of phase constructively interfere to create bright bands.
d Waves that are in phase constructively interfere to create bright bands.
4 Which statement about the observed results of the double-slit experiment is true?
a Waves that are in phase constructively interfere to form dark bands.
b Waves that are out of phase constructively interfere to form dark bands.
c Waves that are in phase destructively interfere to form dark bands.
d Waves that are out of phase destructively interfere to form dark bands.
5 A scientist decreases the wavelength of the light used in a double-slit experiment and keeps every other aspect the same. What will be true about the new interference pattern seen on the screen compared to the original interference pattern?
a The spacing between the dark fringes will increase.
b The spacing between the bright fringes will increase.
c The spacing between the bright fringes will decrease.
d The spacing between the dark fringes will remain the same.
6 Consider the two-slit interference experiment. Electromagnetic radiation passes through the two slits that are a distance of 0.0170 nm apart. A fourth-order bright fringe forms at an angle of 8.0 degrees relative to the incident beam. What is the wavelength of the light?
a 789 nm
b 420 nm
c 581 nm
d 591 nm
Answer:
1. Two bright bands would appear on the screen in line with the slits.
2. Waves that make up the radiation collide with each other so that they add together or cancel each other out.
3. Waves that are in phase constructively interfere to create bright bands.
4. Waves that are out of phase destructively interfere to form dark bands.
5. The spacing between the bright fringes will decrease.
6. 581 nm
Explanation:
a person who has a job that requires working all night and sleeping during the day will end up fighting hos or her natural
A. circadian rhythm
B. consciousness rhythm
C. dream patterns
D. daylight response
Answer:
The answer is circadian rhythm (A).
A person who has a job that requires working all night and sleeping during the day will end up fighting his or her natural circadian rhythm.
What is sleep?Sleep is a naturally recurring state of mind and body, characterized by altered consciousness, relatively inhibited sensory activity, reduced muscle activity and inhibition of nearly all voluntary muscles during rapid eye movement sleep, and reduced interactions with surroundings.
Circadian rhythms are changes in the body, brain, and behavior that occur on a 24-hour cycle. Most living things, including animals, plants, and bacteria, are impacted by these natural processes, which predominantly react to light and darkness. Circadian rhythms are studied in chronobiology.
A person who has a job that requires working all night and sleeping during the day will end up fighting his or her natural circadian rhythm.
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To better understand crash dynamics we have to look at "__________."
A. the law of gravity
B. Bernoulli's principle
C. the laws of motion
D. Archimedes' principle
To better understand crash dynamics we have to look at "the laws of motion."
The laws of motion
The laws of motion were introduced by Sir Isaac Newton in 1687 in his book Philosophiæ Naturalis Principia Mathematica ("Mathematical Principles of Natural Philosophy"), which defined the laws of motion, or three fundamental laws that govern the movement of bodies. The laws of motion, according to Newton, govern the motion of an object or a system of objects that interact.
It defines the concepts of force and mass, and the fundamental dynamics of motion.The following are the laws of motion:Every object will remain at rest or in uniform motion in a straight line unless compelled to change its state by the action of an external force. The velocity of an object changes proportional to the force applied to it, and the acceleration of an object is proportional to both its force and its mass. For every action, there is an equal and opposite reaction.
Therefore, these laws are necessary to fully grasp crash dynamics because they explain how objects respond to outside forces that cause them to accelerate or decelerate.
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The pressure on a volume of liquid V = 1.0 mº at the surface is approximately equal to the atmospheric pressure Patm = 1.00 x 105 N/m2. If this volume of liquid is now
placed at a depth where the pressure is P = 2.30 x 10' N/m², what will be the change in volume of the liquid (in mº)? The bulk modulus of the liquid is 8.0 x 100 N/m².
(Include the appropriate sign with your answer.)
m
Additional Materials
Answer:-2.86*10⁻⁴
Explanation: Use the equation change in volume = (change in pressure * original volume) / Bulks Modulus. ΔV = (-Δp*V₀) / B
Plugging in your numbers, you should get ΔV = (-2.29*10⁷*1) / (8*10¹⁰) = -2.86*10⁻⁴
ΔP = P₂-P₁ ----> ΔP = 2.30*10⁷ - 1.00*10⁵ = 2.29*10⁷
A man of weight 60N climbed stairs of height 15m high in 15s. Find the power
of the man,
When you apply a horizontal force of 51 N to a block, the block moves across the floor at a constant speed. (a) When you apply a force of 40 N to the block initially at rest, what is the magnitude of the horizontal component of the force that the floor exerts on the block? (b) When you apply a force of 59 N, what is the magnitude of the horizontal component of the force that the floor exerts on the block?
(a) When you apply a force of 40 N, the magnitude of the horizontal component of the force that the floor exerts on the block is 51 N.
(b) When you apply a force of 59 N, the magnitude of the horizontal component of the force that the floor exerts on the block is 51 N.
Net force on the blockThe horizontal component of the force that the floor exerts on the block is determined by applying Newton's second law of motion;
\(F = ma\)
When the block moves at a constant speed\(\Sigma F = 0\\\\F - F_f = 0\\\\F = F_f\)
\(F_f = F\\\\F_f = 51 \ N\)
where;
\(F_f\) is the frictional force exerted on the block by the floorSince the surface (floor) is constant, the frictional force (horizontal component of the force that the floor exerts on the block ) will be the same on the cases.
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Based on the definition of limiting frictional force;
the magnitude of the horizontal component of the force that the floor exerts on the block is equal to 40 N when a force of 40 N is applied to the block, the magnitude of the horizontal component of the force that the floor exerts on the block is equal to 51 N, the limiting frictional force, when a force of 59 N is applied to the block.What is force?Force is any push or pull effect which tends to cause a change in the motion or shape of an object.
Based on Newton's third law, every force produces an equal and opposite reaction.
Therefore, the force that the floor exerts on the block is oppositely direction to the force exerted by the horizontal force acting on the block.
Since a horizontal force of 51 N applied to the block is required to keep the block moving across the floor at a constant speed, this is the limiting frictional force.
a) when a force of 40 N is applied to the block, the magnitude of the horizontal component of the force that the floor exerts on the block is equal to 40 N
b) when a force of 59 N is applied to the block, the magnitude of the horizontal component of the force that the floor exerts on the block is equal to 51 N, the limiting frictional force.
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The resultant of three vectors is 90.00 cm 34o N of W. If two of these three vectors are 17.89 cm 27o W of S, and 36.00 cm NW, what is the magnitude and direction of the third vector? (Ans: 57.85 cm, 44.76o N of W)
Answer:
Magnitude of the third vector: 57.85 cm
The direction of the third vector: 44.76 N of W
Explanation:
What order does energy flow: sun prodecer consumer?
Energy flows from the Sun to producers, then to primary consumers, secondary consumers, and potentially to tertiary consumers, forming a pyramid-shaped structure that represents the transfer of energy through different trophic levels in an ecosystem.
Energy flows in a specific order through various components of an ecosystem, starting with the Sun and progressing through producers and consumers. This flow of energy is known as the energy pyramid or trophic levels.
At the base of the energy pyramid is the Sun, which is the ultimate source of energy for most ecosystems on Earth. Sunlight provides the energy needed for photosynthesis, a process carried out by plants, algae, and some bacteria, collectively known as producers. These organisms convert solar energy into chemical energy through photosynthesis, using carbon dioxide and water to produce glucose and oxygen. This process captures and stores energy in the form of organic compounds.
The next level in the energy pyramid consists of primary consumers, also known as herbivores. These are animals that feed directly on producers, such as grazing animals or insects that consume plants. Herbivores obtain energy by consuming plant material and breaking down the organic compounds present in the plants into simpler forms, such as sugars and amino acids, through digestion.
Above the primary consumers are the secondary consumers, which are carnivores or omnivores that feed on herbivores. They obtain energy by consuming primary consumers and breaking down the organic compounds in their prey through digestion. This energy transfer continues up the trophic levels, with each level consuming the one below it.
At the top of the energy pyramid are tertiary consumers, which are typically apex predators. They are carnivores that consume other carnivores. Tertiary consumers obtain energy by consuming secondary consumers and breaking down the organic compounds in their prey.
It's important to note that energy is not efficiently transferred between trophic levels. Only a fraction of the energy consumed at each level is converted into biomass and passed on to the next level. This inefficiency is due to processes such as respiration, heat loss, and incomplete digestion.
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The figure below shows a box with a mass of m = 7.40 kg that starts from rest at point A and slides on a track with negligible friction. Point A is at a height of ha = 5.10 m. An illustration shows a wavy track, starting from a crest, moving to a trough, then again to a crest and trough, and finally to a crest that then moves downward. Three points in the track are highlighted, A, B, and C. Point A is at the top of the track where a box of mass m is placed ready to get released. It is at the height labeled ha from the ground. Point B is shown at the next crest and is at a height of 3.20 meters from the ground. Point C is shown at the following trough and is at a height of 2.00 meters from the ground. (a) What is the box's speed at point B (in m/s)? m/s What is the box's speed at point C (in m/s)? m/s (b) What is the net work (in J) done by the gravitational force on the box as it moves from point A to point C?
Work done by gravity when it moves from A to C will be 288.6 joule
How to calculate the valueApplying conservation of energy between point A and B,
7.4xgx5.9 = 1/2x7.4xv2 + 7.4xgx3.2
873.2 = 7.4v2 + 473.6
v = 7.34 m/s
It should be noted that to find velocity at C, which has come down to a height of 2 meter, it means it has travelled by 5.9-2 =3.9 m
so, v2 = 2gh = 20x3.9 =
v = 8.83 m/s
Work done by gravity when it moves from A to C = mxgx(5.9-2) = 288.6 joule
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Fred the fisherman has been told that, because
of refraction, a fish in water will
appear
nearer the water's surface than it really is.
to be
He draws a diagram to try to work this out.
I think it will look lower, not higher.' he says.
Explain what Fred has done wrong.
Due to light refraction, any fish in the water can see a fisherman on the bank a little more clearly than one might anticipate. When the light hits the water's surface, it “bends” down by around 13 degrees, leaving the image. Thus option A is correct.
What refraction affect the fisherman?When it reaches the surface, light emanating from the fish refracts (changes direction). When viewed from above the water, a fish appears to be closer to the surface than it actually is.
Therefore, Fred the fisherman has been told that, because of refraction, a fish in water will appear.
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What is the magnitude of the electric field at a point 0.0075 m from a 0.0035
C charge?
Use E-
kq
and k - 9.00 x 10° N.m²/C2.
A. 1.9 x 1010 N
B. 4.2 x 10' N
O c. 5.6 x 1011 N
D. 5.5 x 1012 N
Explanation:
E = 9×10^9 × 0.0035 /(0.0075)²
= 9×10^9 × 3.5×10`³/(7.5×10`³)²
= 31.5×10^6 /(56.25 ×10^-6)
= 0.56 × 10^12
= 5.6 × 10^11 N/C (option C)
A 6000 kg roller coaster goes around a loop of radius 30 m at 6 m/s. What is the centripetal acceleration?
Answer:
The answer to the question is 7200
Calculate the rotational kinetic energy of a 9-kg motorcycle wheel if its angular velocity is 137 rad/s and its inner radius is 0.280 m and outer radius 0.330 m.
The rotational kinetic energy = 7909.73 Joules
Explanation:The mass of the motorcycle, m = 9kg
The angular velocity, w = 137 rad/s
Inner radius, r = 0.280 m
Outer radius, R = 0.330 m
The rotational kinetic energy is calculated as:
\(KE_{\text{rot}}=\frac{m}{4}(r^2+R^2)w^2\)Substitute m = 9, r = 0.280, R = 0.330, and w = 137 rad/s into the formula above
\(\begin{gathered} KE_{\text{rot}}=\frac{9}{4}(0.280^2+0.33^2)137^2 \\ KE_{\text{rot}}=\frac{9}{4}(0.1873)(18769) \\ KE_{\text{rot}}=7909.73\text{ }Joules\text{ } \end{gathered}\)
In a DC generator, the generated emf is directly proportional to the
In a DC generator, the generated electromotive force (emf) is directly proportional to the rotational speed of the generator's armature and the strength of the magnetic field within the generator.
This relationship is described by the equation for the generated emf in a DC generator:
Emf = Φ * N * A * Z / 60
Where:
Emf is the generated electromotive force (in volts),
Φ is the magnetic flux density (in Weber/meter^2\(meter^2\) or Tesla),
N is the number of turns in the armature winding,
A is the effective area of the armature coil (in square meters),
Z is the total number of armature conductors, and
60 is a constant representing the conversion from seconds to minutes.
From this equation, we can see that the generated emf is directly proportional to the magnetic flux density (Φ) and the product of the number of turns (N), effective area (A), and the total number of armature conductors (Z). This means that increasing any of these factors will result in a higher generated emf.
The magnetic flux density (Φ) can be increased by using stronger permanent magnets or increasing the strength of the field windings in the generator.
The number of turns (N) and the effective area (A) are design parameters and can be optimized for a specific generator. Increasing the number of turns or the effective area will result in a higher generated emf.
Similarly, the total number of armature conductors (Z) can be increased to enhance the generated emf.
By controlling and optimizing these factors, the generated emf in a DC generator can be increased, resulting in higher electrical output. However, it is important to note that there are practical limits to these factors based on the design and construction of the generator.
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A Motorcycle Jump. You are planning to make a jump with your motorcycle by driving over a ramp that will launch you at an angle of 30.0° with respect to the horizontal. The front edge of the ramp on which you are supposed to land, however, is 25.0 ft lower than the edge of the launch ramp (i.e., your launch height).
(a) Assuming a launch speed of 55.0 mph, at what horizontal distance from your launch point should the landing ramp be placed?
(b) In order to land smoothly, the angle of the landing ramp should match the direction of your velocity vector when you touch down. What should be the angle of the landing ramp?
a. the landing ramp should be placed at 276.298 ft horizontally from the launch point.
(b) the angle of the landing ramp is 30°.
How do we calculate?(a)
Launch speed = 55.0 mph * (1.467 ft/s)
= 80.685 ft/s
Horizontal distance = Launch speed * Time of flight
Vertical velocity = Launch speed * sin(30.0°)
Time to reach maximum height = Vertical velocity / g
Vertical distance = (1/2) *g * t²
and Time = √(2 * Vertical distance / g)
Total time of flight = 2 * Time to reach maximum height + Time for descent
Horizontal distance = Launch speed * Total time of flight
The Vertical velocity = 80.685 ft/s * sin(30.0°)
= 40.3425 ft/s
Time to reach maximum height = 40.3425 ft/s / 32.2 ft/s²
Time to reach maximum height = 1.253 s
Time of descent = √(2 * 25.0 ft / 32.2 ft/s²)
Time of descent = 0.913 s
Total time of flight = 2 * 1.253 s + 0.913 s
Total time of flight = 3.419 s
In conclusion, the horizontal distance = 80.685 ft/s * 3.419 s
horizontal distance = 276.298 ft
b.
the angle of the landing ramp is 30.0 be the same as the launch angle.
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A system of four capacitors is connected across a 90-V voltage source as shown in the figure.
(a) What is the potential difference across the plates of the 6.0-µF capacitor? (b) What is the charge on the 2.0-µF capacitor?
For a system of four capacitors is connected across a 90-V voltage source, the potential difference across the plates of the 6.0-µF and 2uF capacitors is mathematically given as
a) vd=30v
b) Q=119.7uc
What is the potential difference across the plates of the 6.0-µF and 2uF capacitors?Generally, the equation for the charge across 6uf is mathematically given as
Q=C6Vd
Where
1/c36=1/3+1/6
c36=2
Q3=2*90
Q3=180
Therefore
vd=180/6
vd=30v
In conclusion
1/c24=1/2+1/4
C24=1.33uf
Q2=1.33*90
Q=119.7uc
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the basic unit of mass in the metric system is
Answer:
Kilogram
Explanation:
How to travel in the speed of light?
Answer:
Explanation:
1. eectromagnetic Fields. Most of the processes that accelerate particles to relativistic speeds work with electromagnetic fields to the same force that keeps magnets on your fridge!
Magnetic Explosions
Wave-Particle Interaction's
When three people with a total mass of 2.00 x 102 kg step into their 1.200 x 103 kg car, the car’s
springs are compressed by 3.0 cm.
1.2.a. What is the spring constant of the car’s springs assuming they act as a single spring?
1.2.b. How far will the car lower if loaded with 3.00 x 102 kg rather than 2.00 x 102 kg
Answer:
a
\(k = 457333.3 N/m\)
b
\(x_a =0.09\ m\)
Explanation:
From the question we are told that
The total mass of three people is \(M = 2.00*10^{2} \ kg\)
The mass of the car is \(m_c = 1.200 *10^{3} \ kg\)
The compression of the car spring is \(x = 3 \ cm = 0.03 \ m\)
Generally the spring constant is mathematically represented as
\(k = \frac{F}{x}\)
Here F is the force exerted by the mass of three people and that of the car , this is mathematically represented as
=> \(F = (M +m_c) *g\)
=> \(F = ([2.0*10^{2} ]+[ 1.200*10^{3}]) * 9.8\)
=> \(F = 13720 \ N\)
So
\(k = \frac{13720}{0.03}\)
=> \(k = 457333.3 N/m\)
Generally if the mass which the car is loaded with is \(m = 3.00*10^{2} \ kg\)
Then the force experienced by the spring is
=> \(F_a = (m +m_c) *g\)
=> \(F_a = (3.00*10^{3} + 1.200 *10^{3}) * 9.8\)
=> \(F_a = 41160 \ N\)
Generally from the above formula the compression is
\(x_a = \frac{F_a}{k}\)
=> \(x_a = \frac{41160}{457333.3}\)
=> \(x_a =0.09\ m\)
What is the definition of power?
Answer:
the capacity to accomplish something or act in a specific way, particularly as a characteristic or faculty
Explanation:
Answer:
Power is the ability to influence or change an outcome. Personal power is a source of influence and authority a person has over his or her followers. ... In short, the power is determined by his or her followers. There are different types of power a person can hold.
Explanation:
OTHER:1 : possession of control, authority, or influence over others. 2 : a nation that has influence among other nations a foreign power. 3 : the ability to act or produce an effect It's in your power to change things. 4 : the right to do something the president's powers.
MORE INFO...What are the 7 types of power?
Legitimate Power. ...
Coercive Power. ...
Expert Power. ...
Informational Power. ...
Power of Reward. ...
Connection Power. ...
Referent Power.
Hope this helps you :))))
A pendulum of length 50 cm is pulled 30 cm away from the vertical axis and released from rest. What will be its speed at the bottom of its swing
Answer:
m g h = 1/2 m v^2 potential energy will be converted to kinetic energy
h = h0 (1 - cos theta) where theta is the displacement
theta = 30 / 50 = .6 theta = 36.9 deg
v^2 = 2 g h from above
h = 50 (1 - cos 36.9) = 50 * .2 = 10 cm
v = (2 * 980 * 10)^12 = 140 cm/sec
Newton's laws of motion
5. Candance got $0.22 in change when she bought chips at the
store. What percent of a dollar does her change represent?
Answer:
22%
Explanation:
Given parameters:
The amount of change = $0.22
Unknown
What percentage of a dollar the change represents = ?
Solution:
A dollar is made up of 100cents;
So;
$0.22 represents 22cents
Percentage of dollar this represents = \(\frac{22}{100}\) x 100 = 22%
A plane is traveling down the tarmac after having landed describe its displacement velocity and acceleration as it moves down the tarmac
If a plane is moving in a straight line down the tarmac after landing, its displacement will depend on its starting and ending points, its velocity depends on displacement and acceleration depends on velocity.
What is the displacement of the plane?
Assuming the plane is moving in a straight line down the tarmac:
Displacement: The displacement of the plane will depend on the starting point and the end point of its motion. If we take the starting point as the point of touchdown, then the displacement will be the distance between the touchdown point and the current position of the plane on the tarmac.
Velocity: The velocity of the plane can be calculated by dividing the displacement of the plane by the time taken to travel that distance. If we assume that the plane is traveling at a constant speed, then its velocity will be constant as well. If the speed is not constant, then the velocity will be changing over time.
Acceleration: If the plane is slowing down as it travels down the tarmac, then it is experiencing negative acceleration (deceleration). If the plane is speeding up, then it is experiencing positive acceleration. The magnitude of the acceleration can be calculated as the change in velocity over time. If the plane is traveling at a constant velocity, then its acceleration will be zero.
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Question 1
2 pts
Explain what causes a solution to be a strong acid.
Answer:
Cuanto más fuerte es el ácido, más rápido se disocia para generar H +start superscript, plus, end superscript. Por ejemplo, el ácido clorhídrico (HCl) se disocia completamente en iones hidrógeno y cloruro cuando se mezcla con agua, por lo que se considera un ácido fuerte.
A box weighs 300N. A force of 20N slide it across a floor at a constant speed. What is the mass of the box? What is the acceleration of the box?
Answer:
Mass = 30kg
Acceleration = 0m/s/s
Explanation:
The weight of an object is its mass multiplied by the gravitational field strength. On Earth the value often used for gravity is 10N/kg. This means there is 10N of force per kg of mass, so the weight of an object will be 10x its mass. Here we are given a weight of 300N, so to find its mass we simply need to divide it by 10. 300/10 = 30kg. The mass of the box is 30kg.
Because the box is being slid across the floor at a constant speed, the velocity is not changing, therefore the acceleration is 0.
Hope this helped!
Answer:
Mass = 30 kg
Acceleration = 0 m / s²
Explanation:
Gravity = 10 N / kg
Thus the mass = 30 kg
We know that the box slide in a constant speed
Thus it doesn't have any acceleration.
Hopefully this answer helps you :)
The two sleds shown below are about to collide. If they stick together in the collision, what will happen after the collision? (In this collision, there is no friction
between the sleds and the snow.)
A. The two sleds will move to the left.
O B. The two sleds will move to the right
O C. The two sleds will be motionless in the middle.
O D. There is not enough information to know which sled will be pushed backward,
om
Answer:
B. The two sleds will move to the right.
Explanation:
I majored in physics
Answer:
b
Explanation:
What is a cold front’s signature wrestling move?
Answer:
The stunner is cold fronts signature wrestling move
plzz help .....When comparing a prokaryotic cell to a eukaryotic cell, an important difference is that the prokaryotic cell
A.is simple, performing limited functions.
B.is relatively small in size and unorganized.
C.has its genetic information stored in the nucleus.
D.has no structures that allow it to store food.
Answer:
C
Explanation: