Amy has a mass of 30 kg, and she is riding a skateboard traveling 5 m/s. What is her momentum
The momentum of Amy of mass 30 kg travelling at a speed of 5 m/s is 150 Kg m/s²
What is momentum?
Momentum is defined as the product of mass and velocity of a body. Mathematically, we can write vector as -
p = mv
It is a vector quantity. In a three dimensional coordinate, the momentum vector can be resolved as -
[p] = p[x] a[x] + p[y] a[y] + p[z] a[z]
[p] = m {v[x] a[x] + v[y] a[y] + v[z] a[z]}
Given is Amy of mass 30 kg and she is riding a skateboard traveling 5 m/s.
Mass of Amy = [m] = 30 Kg
Velocity of Amy = [v] = 5 m/s
Now, the momentum of Amy will be -
p[A] = mv = 30 x 5 = 150 Kg m/s²
Therefore, the momentum of Amy of mass 30 kg travelling at a speed of 5 m/s is 150 Kg m/s²
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Classify Use periodic table to classify the elements potassium (K) ,Bromine (Br) and argon, (Ar) according to know likely their atoms are to do the following
A-Lose electrons to form positive ions
B-Gain electrons to form negative ions
C-Neither gain or lose electrons
Potassium is likely to lose electrons to form positive ions, Bromine is likely to gain electrons to form negative ions, and Argon is neither likely to gain or lose electrons.
Explanation:Potassium (K) is in Group 1 of the periodic table, which means it has one valence electron. It is highly likely to lose this electron to form a positive ion (K+).
Bromine (Br) is in Group 17, so it has seven valence electrons. It is highly likely to gain one electron to complete its octet and form a negative ion (Br-).
Argon (Ar) is in Group 18, a group of noble gases that have a full octet of valence electrons. These elements are stable and generally do not gain or lose electrons.
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Table salt (NaCl) dissolves in water. What happens when saltwater is made? A) The salt crystals sink to the bottom of the water. B) The salt crystals split into ions. C) The salt crystals float to the top of the water. D) The water molecules split into ions
compare the life cycles of flower less seed plant and flowering seed plants
The life cycles of gymnosperms and angiosperms include seed germination and development stages; however, angiosperms are unique in their production of flowers and fruit-enclosed seeds, which distinguishes them from gymnosperms with exposed seeds on cones.
The life cycles of both non-flowering seed plants, like gymnosperms, and flowering seed plants, known as angiosperms, are characterized by a sequence of developmental stages from seed germination to the production of new seeds. However, there are fundamental differences between these two groups of plants. In the life cycle of a gymnosperm, seeds are not enclosed within a fruit but are often found on the scales of cones. In contrast, angiosperms produce seeds within a fruit, which develops from the flower.
The flower is the reproductive structure that typically includes petals, stamens, pistils, and is responsible for the sexual reproduction of these plants. Angiosperms are divided into two main groups: monocots and dicots. Basal angiosperms differ from other flowering plants in having traits that are more ancestral or less derived. The life cycle of an angiosperm involves alternating generations, with the sporophyte phase being the dominant generation.
The process of seed development in angiosperms is often characterized by the acronym RRAPP, signifying Reduction of the gametophyte, Retention of the gametophyte within the tissues of the parent plant, Arrested development of the seed until favorable conditions, Provisioning of the embryo with nutritive tissue, and Packaging of the seed with a protective coat.
Summarily, the distinctive flower structure and the protected seed development are key differentiators of angiosperms when compared with gymnosperms. Both life cycles show reduction in the haploid stage and growing complexity over time, but angiosperms have advanced further by incorporating flowers and encased seeds into their reproductive strategy.
Rounded to the nearest whole number, what is the atomic mass of platinum? 78 117 195 273
Answer: The atomic mass of the platinum will be 195.
Explanation:
We know that,
Atomic mass is the sum of the electrons and protons.
Platinum is the chemical element and it is the symbol is Pt. The atomic number of the platinum is 78 and the atomic mass is the 195,084 u.
According to the question,
Rounded to the nearest whole number
Hence, The atomic mass of the platinum will be 195.
John and Daniel are playing tug-of-war together. John is exerting 10 N of force. Daniel is exerting 12 N of force. What is their net force
an unbalanced force moving everyone in Daniel and Maria's direction
what happens to a muscle when you exercise it?
Answer:
More blood is pumped to the exercising muscles to deliver that additional O
Explanation:
A car is traveling at a constant velocity of 60 km/h for 4 hours. Choose the correct statement about the acceleration of the car. A) The acceleration of this car is zero. B) The acceleration of this car is positive. C) The acceleration of this car is negative. D) The acceleration of this car is 15 m s .
The element oxygen, represented by the symbol O, is classified as
what is friction. what does friction do as an ice skater slide across the ice?
Friction is a force that opposes motion between surfaces in contact. When an ice skater slides across the ice, friction between the skates and the ice slows them down and eventually brings them to a stop.
Explanation:Friction is a force that opposes relative motion between surfaces in contact. When an ice skater slides across the ice, friction between the skates and the ice slows down the skater and eventually brings them to a stop. The ice skates exert a force on the ice, and the ice exerts an equal and opposite force on the skates, creating friction.
why do electrons move from the negative end of the tube to the positive end? please help
Final answer:
Electrons move from the negative to the positive end in a tube due to the electric field created by the potential difference, attracting the negatively charged electrons towards the positive charge. The power source or battery maintains this potential difference, and the motion of electrons is also influenced by thermionic emission in cathode ray tubes.
Explanation:
Electrons move from the negative end to the positive end of a tube because they are negatively charged and are attracted to the positive charge. This movement is due to the electric field created by the potential difference between the negative and positive ends. When electrons travel through conductors, such as metal wires, they encounter resistance from other electrons, atoms, and impurities, losing energy along the way. To maintain their motion, there must be a force, supplied by the electric field, which points from the higher potential to the lower potential end. Since electrons are negatively charged, they move in the direction opposite to the electric field.
In many real-world applications, including electronic circuits and vacuum tubes, the force driving electron movement is the electric potential difference, or voltage, between two points. This potential difference is often created by a battery or other power source, which functions as an electromotive force (emf) source. It moves the negative charges from the positive terminal to the negative terminal, thereby maintaining the potential difference.
Additionally, in cathode ray tubes, electrons are emitted from the cathode due to thermionic emission, where heat causes the detachment of electrons. Both the repulsion from the negatively charged cathode and the attraction to the positive anode encourage electrons to move toward the anode. However, this force is not purely due to attraction and repulsion; it is also influenced by the thermionic effect, which is based on heat-induced motion.
Which type of bond (ionic, covalent, or metallic) does the phrase "opposite attract" apply to best? Explain.
List at least three things that can happen as plate spread apart.
b. Place these events in order by numbering them
red fox
sage shrub
fence lizard
grasshopper
If these organisms were arranged in a food pyramid, which organism would have the LEAST amount of total energy available?
A. red fox
B. sage shrub
C. grasshopper
D. fence lizard
Answer:
The answer is A: red fox
Explanation:
At the beach, describe where or when you would see wave
fronts. How are wave fronts useful to surfers?
Final answer:
Wave fronts at the beach are observable as waves approach the shore and become nearly parallel due to refraction, which is significant for surfers as it creates larger waves off points and headlands, ideal for surfing.
Explanation:
At the beach, wave fronts are observed especially where ocean waves formed by winds reach the shallower waters near the shore. Due to the phenomenon of wave refraction, as waves travel from deeper to shallower water, their speeds decrease, causing the wave fronts to realign almost parallel to the shoreline. This process is critical for surfers as the refraction of wave fronts concentrates wave energy towards points and headlands, offering larger and more consistent waves suitable for surfing.
Surfers benefit from understanding wave fronts and wave refraction because it helps them identify the best spots for larger waves, particularly off of points and headlands where wave energy is focused. Meanwhile, bays will have calmer waters due to the dispersion of wave energy, making them less ideal for surfing. This knowledge is crucial for surfers when choosing locations to surf, as the geometry of the coastline significantly influences wave characteristics.
suppose you want to build a house on the edge of a hill that overlooks a deep valley. what measures could you take to be sure your home will not have problems due to weathering or erosion
Glacial episodes are an example of
a scientist discovers an object in the solar system .she describes it as bigger than an asteroid,smaller than mercury and farther than Neptune from the sun what is it explaine
Answer: Probably the dwarf planet - Pluto
Explanation:
Pluto was once a planet and was demoted to a dwarf planet. It has size smaller than mercury ( 25 times smaller) but larger than asteroid. Pluto has 5 moons. It lies beyond the orbit of Neptune in the Kuiper belt. It was discovered by Clyde Tombaugh in 1930. Pluto revolves around sun in 248 years.
The object discovered by the scientist is most likely to be Pluto.
The Apollo missions ended with what mission?
The Apollo missions ended with Apollo 17, which landed on the Moon in December 1972 and included a geologist among its astronauts.
The Apollo missions concluded with Apollo 17, which was the last mission to land on the Moon. This historic mission took place in December of 1972 and marked the culmination of NASA's lunar landing efforts. While there were a total of nine Apollo flights to the Moon, six of which successfully landed while the others orbited the Moon, it was Apollo 17 that closed this pioneering chapter in space exploration.
The mission was not only significant for its successful lunar landing but also because it included a scientist, geologist Jack Schmitt, among the astronauts, enhancing the mission's scientific contribution.
Explain how the first three steps of scientific inquiry are related.
Answer:
Explanation:
The scientific inquiry is a fact finding inquiry for determining the cause or occurrence of the natural processes, events or phenomena. The three steps of the scientific inquiry are related such a making a background research for the desired topic, observation of the natural process, and making hypothesis based on the observation. These three steps are basic for conducting a research and for finding the facts associated with the research.
Using Hooke's law, F spring=k delta x, find the distance a spring with an elastic constant of 4 N/cm will stretch if a 2 newton force is applied to it.
A.) 2 cm
B.) 1/2 cm
C.) 4 cm
D.) 8 cm
Hello!
Using Hooke's law, F spring=k delta x, find the distance a spring with an elastic constant of 4 N/cm will stretch if a 2 newton force is applied to it.
Data:
Hooke represented mathematically his theory with the equation:
F = K * Δx
On what:
F (elastic force) = 2 N
K (elastic constant) = 4 N/cm
Δx (deformation or elongation of the elastic medium or distance from a spring) = ?
Solving:
[tex]F = K * \Delta{x}[/tex]
[tex]2\:N = 4\:N/cm*\Delta{x}[/tex]
[tex]4\:N/cm*\Delta{x} = 2\:N[/tex]
[tex]\Delta{x} = \dfrac{2\:\diagup\!\!\!\!\!N}{4\:\diagup\!\!\!\!\!N/cm}[/tex]
simplify by 2
[tex]\Delta{x} = \dfrac{2}{4}\frac{\div2}{\div2}[/tex]
[tex]\boxed{\boxed{\Delta{x} = \dfrac{1}{2}\:cm}}\Longleftarrow(distance)\end{array}}\qquad\checkmark[/tex]
Answer:
B.) 1/2 cm
_______________________
I Hope this helps, greetings ... Dexteright02! =)
Using Hooke's Law and the given force and spring constant, we can calculate that a spring will stretch 1/2 cm when a force of 2 Newtons is applied.
Explanation:In this problem, we're tasked with using Hooke's law, which in mathematical terms is expressed as F = k delta x. Here, F denotes force, k is the spring constant, and delta x represents the distance the spring moves or is stretched from its original position.
This law shows the relationship between the force applied to a spring and the distance it stretches. The greater the force applied, the further the spring stretches. The spring constant, meanwhile, represents the spring's resistance to distortion.
Given that the force 'F' is 2 Newtons, and the spring constant 'k' is 4 Newtons per centimeter, we substitute these values into Hooke's law:
2 = 4 * delta x
By rearranging the equation to solve for delta x, we can find that the distance the spring stretches is 0.5 cm. Therefore, the correct answer is:
B.) 1/2 cm
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All of the following are possible sources of error in a scientific investigation except for
A. Measuring the change in temperature incorrectly
B. Manipulating the wrong variables in the experiment
C. Reviewing previously published studies before the experiment
D. Completing only one trial in the experiment
Your answer would be C my friend
How is momentum conserved in a system in which two satellites connect?
Question 19 options:
The one satellite has all the momentum before they connect, and then afterwards they share it.
Both satellites have momentum before they connect, and afterwards they have less momentum.
Both satellites have momentum before they connect, and afterwards they have more momentum.
Momentum is not conserved when the two satellites connect.
Answer:
The one satellite has all the momentum before they connect, and then afterwards they share it.
Explanation:
I took the test and I got it correct.
Hope this helps! :)
Final answer:
Momentum is conserved in a system where two satellites connect. Before the connection, both satellites have momentum, and after the connection, the total momentum of the system remains the same.
Explanation:
Momentum is conserved in a system in which two satellites connect. Before the connection, both satellites have momentum, and after the connection, they continue to have momentum. However, the total momentum of the system remains the same before and after the connection. This means that if one satellite gains momentum, the other satellite must lose an equal amount of momentum to maintain conservation of momentum
Therefore, the correct option is option A The one satellite has all the momentum before they connect, and then afterwards they share it.
the formula for sodium sulfide is na2s what does it mean
Final answer:
The formula Na₂S means that there are two sodium ions paired with one sulfide ion to create a neutral ionic compound. Sodium ions carry a 1+ charge and sulfide ions have a 2- charge, so two sodium ions are required to balance out one sulfide ion, leading to the formula Na₂S.
Explanation:
The formula for sodium sulfide, Na₂S, represents an ionic compound formed between the sodium cation, Na⁺, and the sulfide anion, S²⁻. To predict the compound's formula, you must consider that sodium tends to form a 1+ ion, while sulfur forms a 2- ion.
For the charges to balance and the compound to be electrically neutral, two sodium ions are needed for every sulfide ion. As a result, the chemical formula Na₂S indicates that there are two sodium ions for every one sulfur ion in the compound.
To balance the positive and negative charges, remember that the total charge in the compound must equal zero. In the case of sodium sulfide, two Na⁺ ions (each with a +1 charge) will balance one S²⁻ ion (with a -2 charge), resulting in a neutral compound.
Thus, we write Na₂S instead of NaNaS, which is the simplified formula as per chemical convention.
This is a graph of a marble traveling across a smooth surface. What is the average speed of this marble?
Answer:
v = 1.5 m/s
Explanation:
The attached figure shows a distance time graph. The motion of marble is uniform. It covers equal distance in equal interval of time. The average speed of the car is calculated by finding its slope in d-t graph.
From the attached figure,
[tex]d_1=6\ m[/tex]
[tex]d_2=3\ m[/tex]
[tex]t_1=4\ s[/tex]
[tex]t_2=2\ m[/tex]
Slope of the graph is given by :
[tex]slope=\dfrac{d}{t}=\dfrac{d_1-d_2}{t_1-t_2}[/tex]
[tex]slope=v=\dfrac{6-3}{4-2}[/tex]
v = 1.5 m/s
So, the average speed of this marble is 1.5 m/s.
1. A student studying a circuit diagram of a lightbulb, battery, and a switch correctly identifies it as a closer circuit. In this diagram, The lightbulb would be
a. an insulator
b. on
c. disconnected
d. off
2. The force of gravity on an object on the surface of Mars is less than the force of gravity on an identical object on the surface of earth. Which of the following is a example why this is true?
a. Mars has more volume than earth
b. Earth has more volume then mars
c. Mars has less mass than earth
d. Earth has less mass then mars
All scavengers are consumers but not all consumers are scavengers true or false explain your answer.
limestone is an example of a chemical sedimentary rock. describe how limestone may form
Since Mars is smaller, how can it have an equal landmass?
With a smaller mass, objects should be denser in order to have an equal landmass.
What is landmass?A landmass is actually defined as the area covered by a solid layer. The phrase is frequently used to describe areas of land enclosed by water, such as a continent or sizable island. A landmass is an identified portion of the continental crust that rises above sea level in the science of geology.
Mars should be denser if it has an equal landmass. But in reality, its landmass is not equal 'cause its density is about 72% of that of earth. Mars is the second-smallest planet in the Solar System and the fourth planet from the Sun. It is just larger than Mercury.
Therefore, with a smaller mass, objects should be denser in order to have an equal land mass.
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it takes a car 1.75h to go from mile marker 10 to mile marker 115. What is the average speed of the car
A 1.6
B65
C183
D60
The average speed of the car for the given distance and time is 60 mph.
The given parameters;
time of motion of the car, t = 1.75 hinitial position, x₁ = 10 milesfinal position, x₂ = 115 milesThe average speed of the car is determined by dividing the total distance by total time of motion as shown below;
[tex]average \ speed = \frac{total \ distance}{total \ time} \\\\average \ speed = \frac{115 - 10}{1.75} \\\\average \ speed = 60 \ mph[/tex]
Thus, the average speed of the car for the given distance and time is 60 mph.
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