Answer:
1.Work done=100 joules
2.potential energy
3.kinetic energy
Explanation:
W=Force x distance
w= 20 N x 5 M
W = 100 JOULES
What do glands do for the body?
Answer: A gland is an organ which produces and releases substances that perform a specific function in the body.
Explanation: A gland is an organ which produces and releases substances that perform a specific function in the body. There are two types of gland. Endocrine glands are ductless glands and release the substances that they make (hormones) directly into the bloodstream.
Answer:
A gland is an organ which produces and releases substances that perform a specific function in the body. There are two types of gland. Endocrine glands are ductless glands and release the substances that they make (hormones) directlyinto the bloodstream.
Explanation:
identify the correct order of increasing intermolecular force of attraction for the three most common states of matter.
A) liquid - solid - gas
B) Solid - liquid - gas
C) gas - liquid - solid
D) gas - solid - liquid
The correct order of increasing the intermolecular force of attraction for the three most common states of matter is C) gas - liquid - solid.
What is an intermolecular force in matter?An intermolecular force is a force of attraction or repulsion that exists between molecules or atoms within a substance.
Here,
In the gaseous state, the intermolecular forces are weak, and the molecules are far apart and move freely in all directions. In the liquid state, the intermolecular forces are stronger, and the molecules are closer together, but still able to move past each other. In the solid state, the intermolecular forces are the strongest, and the molecules are tightly packed together in a fixed arrangement, which results in a definite shape and volume.
Therefore, the correct order of increasing the intermolecular force of attraction for the three most common states of matter is gas, liquid, and solid.
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The pressure of water at the bottom of a well is _________ than at the surface of the pond.
Answer:
Greater
Explanation:
When you go deeper in water, the presure increases, the deeper you go, so it would be greater in a well then the surfce of a pond. Hope this helps!
A new pest is found that only feeds on corn plant leaves. Which promoter would you choose if the modified gene produces toxins that are not safe for livestock to ingest?
1072AQ3
A. Promoter 1.
B. Promoter 2.
C. Promoter 3.
D. Promoter 4.
It is actually B. Promoter 2.
Your welcome
Say safe
The burning of fossil fuels contributes to the addition of greenhouse gases to the atmosphere. These gases trap thermal energy in the Earth’s atmosphere. Which of the following would be the most reasonable changes that could result from an increase in the burning of fossil fuels?
A. The air all over the globe would become dirtier.
B. There would be a global rise in temperatures.
C. Ecosystems would become more diverse.
D. Rates of photosynthesis would decrease.
Answer:
B. there would be a global rise in temperatures
Hence, global warming
Explanation:
hope this helped! :D
_ is (are) the type of electromagnetic wave(s) with a wave length between 700 and 400 billionths of a meter.
Answer:
Visible Spectrum is the type of electromagnetic wave with a wave length between 700 and 400 billionths of a meter.
Any two differences between SI units and derived units
help me...
Answer:
SI unit
1) SI unit does not depend on other.
2) they have their own identity.
Derived unit
1) They depend upon other or fundamental unit.
2) they don't have their own identity.
A 1500 Kg automobile is traveling at a velocity of 100 m/s. Is its energy potential or kinetic? How much energy does it possess? (Remember to convert kg to g)
Answer:
1.) Kinetic energy
2.) K.E = 7500000000 J
Explanation: Given that a 1500 Kg automobile is traveling at a velocity of 100 m/s.
An object possesses maximum potential energy when it is at rest
And maximum kinetic energy on motion. Since the automobile is travelling with a speed of 100 m/s, its energy is kinetic.
The amount of energy possessed, will be achieved by using formula
K.E = 1/2MV^2
Where
M = 1500kg
To convert it to g, multiply it by 1000
M = 1500 × 1000 = 1500000
V = 100 m/s
K.E = 1/2 × 1500000 × 100^2
K.E = 0.5 × 1500000 × 10000
K.E = 7500000000 J
In a physics motion study, students established a frame of reference for measurements. Which of the following is their most likely choice?
A. time since the beginning of the class period
B. mass as a ratio to that of the same volume of water
C. distances from two walls and the floor
D. temperature at the start of the motion
Our solar system is said to be a Heliocentric model. What is at the center of our solar system?
A)
An exploding star called a Supernova
B)
A star composed of hydrogen and helium
)
A star composed of nitrogen and helium
D)
A black hole where a massive star collapsed
Answer:
B) A star composed of hydrogen and helium
Explanation:
This star is called the sun and is made up of about 70% hydrogen and 28% helium.\
1. When an object moves it acquires
(a) friction
(b) traction
(d) speed
(c) energy of motion
When an object moves it acquires energy of motion. An thing that is in motion gains energy of motion, often known as kinetic energy. The energy an item possesses as a result of its motion is known as kinetic energy.
The item accumulates kinetic energy when it moves faster or at a specific velocity. The mass and speed of the item affect the quantity of kinetic energy.
Kinetic energy is calculated as KE = 0.5 * mass * velocity * 2. Because of the direct connection between an item's speed and the energy required to move it, the kinetic energy of an object grows exponentially as its velocity rises.
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This question is about waves. I need help,thanks. I need full sentences.
Which of the following provides the best summary of the process of natural
selection?
A. Population sizes increase with every generation.
B. Individuals pass on their best traits to their offspring.
C. Mutations help an individual survive and reproduce.
D. Well-adapted individuals survive and reproduce.
Answer:
B. Individuals pass on their best traits to their offspring.
Explanation:
because genes are always passed from parents to offspring.
The best summary of the process of natural selection is Individuals pass on their best traits to their offspring. Hence, the correct option is B.
What is the theory of Natural selection?The theory of natural selection gives the mechanism of evolution. It defines the method of different survival and reproduction of individuals due to differences in phenotype.
The theory of natural selection was proposed by Charles Darwin as a way of adaptation and speciation. The variations occur in organisms by random mutations occurring in the genome of individual organisms and this change in mutations may inherit in offspring.
Organisms that are more adapted to the environment are more likely to survive and pass on the genes to future generations. This process cause changes to the generations and diverged over time.
The organisms produce more offspring that are able to survive in the environment. The four factors of natural selection are Variations, Inheritance, Selection, and time.
Thus, the best summary of the process of natural selection is individuals pass on their best traits to their offspring. Hence, the ideal solution is option B.
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Sound is a type of mechanical wave and must have a medium through which to travel. Sound will move at different speeds when which of the following occurs?
A. The sound is fully absorbed in an object.
B. The sound moves from air to water.
C. The sound pitch increases.
D. The sound is reflected off a surface.
A 200-kg boulder is 1000-m above the ground. what is its potential energy?
Explanation:
PE = mgz = 200 * 9.81 *1000 = 1962 KJ
A 200-kg boulder is 1000-m above the ground. 1962 KJ is its potential energy.
What is potential energy ?The term potential energy is defined as the stored energy that depends upon the relative position of various parts of a system. Because it has a potential to do work when released it is called as potential energy.
A spring has more potential energy when it is stretched. Any object that is stretched from its resting position has stored energy, so it is called potential energy.
The SI unit of electric potential is represented by volt (V), and it can also be written as Joule per Coulomb. The unit of potential energy is joules.
Potential energy = mgz
= 200 × 9.81 × 1000
= 1962 KJ
Thus, A 200-kg boulder is 1000-m above the ground. 1962 KJ is its potential energy.
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Cabbage juice can be used as a pH indicator. Using the above chart, choose all of the statements that are correct
Answer:
Google it muh homie
Explanation:
Explanation:
lemon juice is a strong acid and would turn cabbage juice red
a sample rainwater turns the cabbage juice violet indicating it is slightly acidic
A pendulum reaches a height of 0.3 m at the top of its swing. If the
bob has a mass of 5 kg, what is the potential energy at the top of its
swing?
Select one:
14.7)
7.35 J
0.45 J
1.5 J
Answer: A
Potential energy = 14.7 J
Explanation:
Given that the
Mass M = 5 kg
Height h = 0.3 m
Let us take acceleration due to gravity g = 9.81 m/s^2
Potential energy = mgh
Substitute all the parameters into the formula above
P.E = 5 × 9.81 × 0.3
P.E = 14.715 J
P.E = 14.7 J approximately
The correct option is therefore A
75 points!
In a particular chemical reaction, the energy of the reactants is 30 kJ and the energy of the products is 5 kJ. The maximum energy of the system is 40 kJ.
A. Sketch a potential energy diagram for this reaction. Make sure to label the energy of the reactants, the energy of the products, the activation energy, and the enthalpy change for the reaction.
B. What is the activation energy for this reaction?
C. What is the enthalpy change for this reaction?
D. Is this reaction endothermic or exothermic? Explain your answer in two ways: first, using the energy values, and second, by referring to the shape of the graph.
Answer:
The activation energy of a chemical reaction is the energy require to form the activated complex and the activated complex then converted to product. The activation energy is always positive for both endothermic and exothermic reactions.
Explanation:
pls if im worng add a star pls
Suppose that you, with a mass of 48kg, is standing on frictionless roller skates when someone throws you a 2.50kg mass with a velocity of 15m/s and you catch it. What will be your resultant velocity?
Answer:
v = 0.74 m / s
Explanation:
We can solve this exercise using the conservation of the moment
initial instant. Before the crash
p₀ = m v
where m is 2.50 kg and its velocity v₀ = 15 m / s
final moment. After catching the dough
[tex]p_{f}[/tex] = (m + M) v
As the system is made up of the mass and the person, all the forces during the impact are internal, therefore the moment is conserved
p₀ = p_{f}
m v₀ = (m + M) v
v = m / (m + M) v₀
we calculate
v = 2.5 / (2.5 + 48) 15
v = 0.74 m / s
A uniform electric field contains a number of particles. All are experiencing forces in the same direction as the electric field. What can be concluded from this?
All the particles have negative charges.
All the particles have positive charges.
All the particles are charged, but they may be positive or negative.
All the particles must be uncharged.
Answer: D
All the particles must be uncharged
Explanation:
If all the particles are positively charged, then there will be force of repulsion between them which will give different directions away from each other. The same is applicable if they are all negatively charged.
If the particles are positively and negatively charged, their will be force of attraction between them which will give different directions towards each other.
For all to be experiencing forces in the same direction, We can conclude that
All the particles must be uncharged.
Answer:
This picture represents the electric field diagram between two particles with static charges.
Do the two particles have the same charge?
✔ no
If the particles are free to move, what affect will the two particles have on each other?
✔ They will attract each other.
If a third particle was added to this field with a positive charge, what would it be attracted to?
✔ B
If an uncharged particle was placed between A and B, which way would it move?
✔ neither direction
Explanation:
Answer fast, please.
What would scorch marks on fabric near bullet wound indicate?
Answer:
Often loose fibers surrounding a contact hole show scorch marks from the flame discharge of the weapon. Some synthetic fibers may be melted. The blowback of muzzle gases may produce a star shaped tear pattern around the hole.
Explanation:
how does the electric force between two charged particles change if the distance between them is increased by a factor of 3? a. it is reduced by a factor of 3 b. it is increased by a factor of 3 c. it is increased by a factor of 9 d. it is decreased by a factor of 9
Answer:
It is reduced by a factor of 9
I need an answer ASAP .....
Why Is total internal reflection important in the use of fiber optics?
Answer:
Hope this helped :
Explanation:
When light passes from a medium with one index of refraction (m1) to another medium with a lower index of refraction (m2), it bends or refracts away from an imaginary line perpendicular to the surface (normal line). As the angle of the beam through m1 becomes greater with respect to the normal line, the refracted light through m2 bends further away from the line.
At one particular angle (critical angle), the refracted light will not go into m2, but instead will travel along the surface between the two media (sine [critical angle] = n2/n1 where n1 and n2 are the indices of refraction [n1 is greater than n2]). If the beam through m1 is greater than the critical angle, then the refracted beam will be reflected entirely back into m1 (total internal reflection), even though m2 may be transparent!
21. An electric lamp is marked 2 points
240V, 60W. What is its
resistance (?) when it is
operated at the correct
voltage?
O A. 1/960
O B. 1/4
O 0.4
O D. 960
Answer:
The resistance of the lamp is 960 ohms.
Explanation:
We have,
Voltage of electric lamp is 240 V and power is 60 W.
It is required to find the resistance of the lamp.
The power of an electrical device is given by :
[tex]P=\dfrac{V^2}{R}[/tex]
R is resistance
[tex]R=\dfrac{V^2}{P}\\\\R=\dfrac{(240)^2}{60}\\\\R=960\ \Omega[/tex]
So, the resistance of the lamp is 960 ohms.
An object has an acceleration of 18.0 m/s/s. If the net force was doubled and the mass were tripled then the new acceleration would be
Answer:
12.0 m/s²
Explanation:
Newton's second law:
F = ma
Solving for acceleration:
a = F/m
If force is doubled and mass is tripled:
a' = (2F)/(3m)
a' = ⅔ (F/m)
a' = ⅔ (18.0 m/s²)
a' = 12.0 m/s²
The new value of acceleration of object is 12 m/s².
Given data:
The magnitude of acceleration of object is, [tex]a =18 \;\rm m/s^{2}[/tex].
Let F be initial net force and m be the initial mass. Then as per the problem, the new values of each are,
F' = 2F
m' = 3m
Apply the Newton's Second law, which says that the product of mass and acceleration of object given net force. Then,
F = ma
F = m(18)
F/m = 18 .................................................(1)
Now, for new value of net force,
F' = m'a'
2F = (3m) a'
2F/3m = a'
a' =2/3× (18) (From equation 1)
a' = 12 m/s²
Thus, we can conclude that the new value of acceleration of object is 12 m/s².
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can someone please help with this
The functional unit of the kidney is the ________?
Answer:
nephron
Explanation:
I can't really explain this one.
Answer:
nephron
Explanation:
thats what it is
An energy-efficient electric fan converts a large portion of the electrical energy that enters it into __________.
A. Sound energy in the fan's motor
B. Kinetic energy of the fan blades
C. Thermal energy in the fan's motor
D. An unwanted form of energy
An energy-efficient electric fan converts a large portion of the electrical energy that enters it into kinetic energy of the fan blades. Hence, option (B) is correct.
What is efficiency?Efficiency is the ability to achieve something or get a desired outcome without wasting resources, time, money, energy, or effort. In a broader sense, it is the capacity to carry out tasks effectively and efficiently.
It denotes the degree of performance that requires the fewest inputs to provide the greatest amount of output in more mathematical or scientific words.
It frequently particularly refers to the ability of a particular application of effort to deliver a particular output with the least amount of waste, expense, or superfluous work. Efficiency covers a wide range of inputs and outputs across numerous disciplines and sectors.
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Which of the following is associated with Earth’s lithosphere?
(10 Points)
A. Crust, Core
B. Crust, Upper Mantle
C. Inner Core, Outer Core
D. Outer Core, Lower Mantle
Answer:
crust, and upper mantle
Explanation:
i had a question like this
earth's lithosphere includes these things
