Why are chemical properties harder to observe than physical properties?

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.

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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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.

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.

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.

Answer:

[tex]\Huge \boxed{\mathrm{20\ kg \cdot 9.8\ m/s^2}}[/tex]

Explanation:

[tex]\sf Weight \ (N)= mass \ (kg) \times acceleration \ of \ gravity \ (m/s^2)[/tex]

[tex]W=mg[/tex]

The mass of the object is 20 kg.

The acceleration of gravity is approximately 10 m/s².

[tex]W=20 \times 10[/tex]

[tex]W=200[/tex]

The weight of the object is 200 N.

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.

The momentum of Amy of mass 30 kg travelling at a speed of 5 m/s is 150 Kg m/s²

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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an unbalanced force moving everyone in Daniel and Maria's direction

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.

Answer:

The answer is A: red fox

Explanation:

Your answer would be C my friend

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.

Answer : The correct option is, (D) Velocity includes rate of change and direction.

Explanation :

Speed : Speed is defined as the distance traveled by an object with respect to the time taken. It is a scalar quantity that means it tell us about the magnitude of an object not direction.

Velocity : Velocity is defined as the rate of change of position of an object with respect to the time. It is a vector quantity that means it tell us about the magnitude and direction of an object.

The only difference between the speed and the velocity is that the velocity tell us about magnitude and direction but speed tell us about magnitude only.

Hence, the correct option is, (D) Velocity includes rate of change and direction.

Speed is a scalar quantity that only considers the magnitude of movement, while velocity is a vector quantity that includes both the magnitude and direction of movement.

D) Velocity includes rate of change and direction.

Speed and velocity are both terms used to describe how fast an object is moving. However, there is a key difference between the two. Speed is a scalar quantity, meaning it only considers the magnitude or size of the movement. Velocity, on the other hand, is a vector quantity. This means it includes both the magnitude and direction of the movement.

For example, if a car is traveling at a speed of 60 miles per hour, that only tells us how fast it is going. However, if we say the car is traveling at a velocity of 60 miles per hour northeast, that tells us both the speed and the direction.

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