what the balance electrons for calcium​

Answer:

46 million tons

Explanation:

i dont know what im suppose to explain

Answer:

7 seconds

Explanation:

please see paper!

vf² = vo²+2ad

vf=vo+at

vf²=3.5²+2.2.75

vf²=312.25

vf=17.67 m/s

vf=vo+at

17.67 = 3.5 +2t

t=7.085 s

The clay ball is initially at rest, we have v = 0. Therefore, the fraction simplifies to:

Fraction = (m1 + m2) / m1

To determine the fraction of the clay ball's initial kinetic energy that remains as the combined kinetic energy of the sphere and the clay ball, we need to consider the principle of conservation of mechanical energy.Let's assume the clay ball and the sphere have masses m1 and m2, respectively. Initially, the clay ball has a kinetic energy given by KE_initial = (1/2)m1v^2, where v is the initial velocity. After the collision, the clay ball and the sphere move together with a common velocity v_f. The combined kinetic energy of the system is given by KE_combined = (1/2)(m1 + m2)v_f^2.

According to the principle of conservation of mechanical energy, the total mechanical energy before and after the collision should be the same. Therefore, we have:

KE_initial = KE_combined

(1/2)m1v^2 = (1/2)(m1 + m2)v_f^2

To find the fraction of the initial kinetic energy remaining, we divide the combined kinetic energy by the initial kinetic energy:

Fraction = KE_combined / KE_initial

= [(1/2)(m1 + m2)v_f^2] / [(1/2)m1v^2]

= [(m1 + m2)v_f^2] / (m1v^2)

= (m1 + m2) / m1

Assuming the clay ball is initially at rest, we have v = 0. Therefore, the fraction simplifies to:

Fraction = (m1 + m2) / m1

Note that the fraction does not depend on the specific value of the velocity.

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Answer:

0.05 cents per fl oz

Explanation:

0.95 divided by 20

0.0475 to the nearest cent 0.05

A BTU is the amount of energy required to raise the temperature of one pound of water by one degree Celsius: False

The energy needed to raise the temperature of one pound of water by one degree Fahrenheit is known as a BTU.

British thermal units are used to assess the capacity of the majority of air conditioners (BTU). One pound (0.45 kilos) of water needs one BTU of heat to increase its temperature by one degree Fahrenheit (0.56 degrees Celsius). One tonne is 12,000 BTU in terms of heating and cooling.

Heat is measured in British thermal units. One BTU is about 1055 joules (J), the joule being the current SI unit for heat energy.  This represents the fact that the temperature change of a mass of water caused by the injection of a particular quantity of heat (measured in energy units, often joules) varies somewhat depending upon the water's beginning temperature.

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Sunlight at a wavelength of 0.4 μm (micrometers) is absorbed (i.e. reduced) by about 0 to 12 percent by the atmosphere when it gets to the surface of the earth.

Between 0.40 and 0.71 micrometers (m) is the wavelength of visible light. In this region, the sun only emits 44% of its total radiation. The spectrum of solar energy ranges from around 0.1 to 4.0 micrometers. The 0.1 to 0.4 micrometer wavelength range contains around 7% of the sun's radiation (UV). Near infrared radiation from the sun falls in the range of 0.71 to 1.5 micrometers, whereas far infrared radiation falls in the range of 1.5 to 4.0 micrometers.

Extraterrestrial radiation is solar radiation that occurs outside the earth's atmosphere. The extraterrestrial irradiation is typically 1367 W/m2. As the earth circles the sun, this number fluctuates by about 3%.

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Explanation:

Taking g=10m/s²

P.E =mgh

981J= 2×10×m

981J=20m

m. = 981J/20

m. = 49.05kg

Examples of amorphous solids include Metals. Hence, the correct option is (A).

Amorphous solids are materials that lack long-range order in their atomic or molecular structure, and therefore have properties that are different from those of crystalline solids. Examples of amorphous solids include glass, plastics, gels, and some ceramics. Thermal energy is not an example of an amorphous solid, as it is a form of energy rather than a material. Nitrogen, on the other hand, can exist in both amorphous and crystalline forms, depending on the conditions of formation. However, metals are not typically considered to be amorphous solids, as they generally have a crystalline structure, although some metallic glasses can exhibit amorphous properties.

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To find the number of loops in a 35 cm long solenoid that produces a 0.78 T magnetic field when carrying a 7.9 A current, first solve for n using the formula:

0.78 T = (4π × 10^(-7) Tm/A) * n * 7.9 A
n = 24846.62 loops/m
Since the solenoid is 35 cm (0.35 m) long, you can now determine the total number of loops:
Total loops = n * length = 24846.62 loops/m * 0.35 m

Summary: The solenoid should have approximately 8696 loops to produce the desired magnetic field of 0.78 T when carrying a 7.9 A current.

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Answer:

Explanation:

Urinary system, reproductive system, and integumentary system

Answer:

Useless body parts include the appendix, the tail bone, and the muscle fibers that produce goose bumps.

The distance covered by the object is given as,

Plug in the known values,

Thus, the distance covered by the object is 81 m.

The Sun is approximately 3/4 of the way through its lifetime.

The Sun is a main-sequence star, meaning it is in the middle stage of its life cycle. Stars like the Sun undergo nuclear fusion, where hydrogen atoms fuse to form helium and release energy. This fusion process provides the Sun with the energy to shine.

Based on current scientific understanding, the Sun is estimated to have a total lifetime of about 10 billion years. It is currently around 4.6 billion years old, which means it has already passed the quarter mark of its lifetime.

As the Sun continues to burn hydrogen in its core, it will gradually undergo changes. Over time, it will exhaust its hydrogen fuel and start to expand into a red giant, eventually shedding its outer layers and forming a white dwarf.

Therefore, considering the Sun's age and estimated total lifetime, it is believed to be approximately 3/4 of the way through its life. However, it's important to note that estimating the exact lifespan of a star is complex, and our understanding may evolve with further research.

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The Sun is approximately 3/4 of the way through its lifetime.The Sun is a main-sequence star, meaning it is in the middle stage of its life cycle. Stars like the Sun undergo nuclear fusion, where hydrogen atoms fuse to form helium and release energy. This fusion process provides the Sun with the energy to shine.

Based on current scientific understanding, the Sun is estimated to have a total lifetime of about 10 billion years. It is currently around 4.6 billion years old, which means it has already passed the quarter mark of its lifetime.

As the Sun continues to burn hydrogen in its core, it will gradually undergo changes. Over time, it will exhaust its hydrogen fuel and start to expand into a red giant, eventually shedding its outer layers and forming a white dwarf.  

Therefore, considering the Sun's age and estimated total lifetime, it is believed to be approximately 3/4 of the way through its life. However, it's important to note that estimating the exact lifespan of a star is complex, and our understanding may evolve with further research.

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The speed of the 12 g bullet is approximately 509.19 m/s when it causes the 11 kg stationary wood block to slide 4.2 cm across the table, with a coefficient of kinetic friction (μk) of 0.20. To find the speed of the 12 g bullet, we will use the conservation of momentum and the work-energy principle. Here are the steps to find the bullet's speed:

1. The total initial momentum of the system (bullet + wood block) is equal to the total final momentum of the system, since there are no external forces acting in the horizontal direction.
Initial momentum = Final momentum
m_bullet * v_bullet = (m_bullet + m_block) * v_final
2. To find the final velocity (v_final) of the system, we will use the work-energy principle.
Work done by friction = Change in kinetic energy
μk * m_block * g * d = 0.5 * (m_bullet + m_block) * v_final^2

3. Rearrange the equation from step 2 to find v_final.
v_final^2 = (2 * μk * m_block * g * d) / (m_bullet + m_block)
v_final = √((2 * μk * m_block * g * d) / (m_bullet + m_block))
4. Plug in the given values (converting grams and cm to kg and m respectively) and solve for v_final.
v_final = √((2 * 0.20 * 11 kg * 9.81 m/s^2 * 0.042 m) / (0.012 kg + 11 kg))
v_final = 0.553 m/s
5. Use the momentum conservation equation from step 1 to solve for v_bullet.
0.012 kg * v_bullet = (0.012 kg + 11 kg) * 0.553 m/s
v_bullet = (11.012 kg * 0.553 m/s) / 0.012 kg
v_bullet =509.19 m/s. So the speed of the bullet is 509.19 m/s.

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Ice at 0 degrees celsius is mixed with water at 0 degrees celsius in a perfectly insulated calorimeter.what happens depends on the relative masses of ice and water,some of the ice will melt and the final temperature will be 0 degrees Celsius.So the correct options are 1,2 and 3.

The amount of ice that melts depends on the relative masses of ice and water. If there is more ice than water, then all of the ice will melt. If there is more water than ice, then some of the ice will remain. The final temperature will be 0 degrees Celsius regardless of how much ice melts.

Option 4 is incorrect because the water is already at 0 degrees Celsius, so it cannot freeze. Option 3 is incorrect because heat is not being transferred into or out of the system, so the temperature will not change.Therefore correct option are 1, 2 and 3.

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Answer: 24.37 m/s/s [forward] = a

Explanation:

First, find mass with the Fgrav formula.

Fgrav=mg

6996=m(9.8)

713.88 kg

Then, plug the answer into Newton's second law formula.

Fnet = ma

1.74e4 = (713.88)a

(1.74e4)/(713.88) = a

24.37 m/s^2 = a

Answer:

Option 4 'stabilization, strength, and power' is correct.

Explanation:

During the stabilization phase, the focus is on developing proper movement patterns and improving muscular endurance to stabilize joints and improve overall posture.

During the strength phase, the focus shifts towards building muscular strength and increasing muscle size, typically through the use of heavier weights and lower reps.

Finally, during the power phase, the focus is on developing explosive power and speed through the use of plyometrics and other high-intensity exercises.

penguins! so momentum is based on mass and velocity, the advantages is that they have stored mass in the form of like fats to keep them warm however they are built to slide basically so that there is less friction when they travel so sideways their bullet like shape helps increase velocity so they have both mass and considerable velocity!

Answer:

6.67 Nm/s

Explanation:

As we know, the rate at which work is done is called power.

Power = Work done/ Time

Power = F * D / T

Where,

F = Force

D = Distance

T = Time

Given,

F = 10N

D = 20m

T = 30s

Power = 10*20/30

Power = 200/30

Power = 6.67 Nm/s

Hope it helps! :)

Answer:

6.67 watts

Explanation:

power=force × velocity

10×20÷30

=6.67 watts

3,970.8

Explanation:

v=661.8×6

3,970.8

The type of energy produced when the handle of a pencil sharpener turns is mechanical energy.

The total of an object's kinetic and potential energy is its mechanical energy. You convert your own chemical energy—obtained through food—into the mechanical energy of a pencil sharpener's handle when you turn the handle.

The pencil is then sharpened using this mechanical energy by spinning the sharpening blades, which grinds away the graphite and wood while generating heat and friction. As the handle warms up from friction, some of the mechanical energy is transferred into thermal energy, and some of it is changed into the kinetic energy of the sharpened pencil as it proceeds through the sharpening process.

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Answer:

D

Explanation:

I’m pretty sure it’s correct but I don’t really know. Just trying to pass science

Answer:

The correct answer is D trust me I did the test

When the concave lens moves in it exit by spreading out like water

Answer:

I don't know sorry brother/sister

Explanation:

please mark as brilliant

The explanation is shown in the picture. Hope it helps!

Edit: where I wrote "m/s" , I should have wrote m/s^2

Vania is correct in her saying that 25 meters per second is speed as in 25 meter per seconds nothing represents the direction in which the speed is pointing.

Speed is a physical quantity that represents the change in distance per unit time it is a scalar quantity and its SI unit is meter per second. Speed only has magnitude but does not have direction.

Velocity is a physical quantity that represents the change in displacement per unit time it is electric quantity and its SI unit is meter per second. Velocity has both magnitude and direction.

Given:

The physical quantity is 25 meters per second.

According to the question Shakib points out that 25 meters per second is velocity, but Shakib is wrong in saying so as in 25 meters per second nothing represents the direction of this quantity.

Here from the given data we can only know the magnitude of the physical quantity but not wear it is pointing towards to.

On the other hand one ya says that 25 m per second is a physical quantity that represents speed and her reasoning is that 25 m per second gives the magnitude as well as the SI units of speed and do not point out in a particular direction therefore the quantity must be speed.

Hence, Vania is correct in her saying that 25 meters per second is speed as in 25 meter per seconds nothing represents the direction in which the speed is pointing.

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Answer: Fn

Explanation: Because Fn is applying force upward

Answer:

Red light would bend the least, because of its wavelengths in the sun, also basing on how reflective the prism or light source is.

__________________________________________________________

Ask in comments.

The amount of wavelength of light thick is the thumbnail x/y.

Given:

Wavelength of light= x

Thickness of thumbnail= y

The amount of wavelength thick the thumbnail is x/y

What is wavelength?

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As the core heats up, the star begins burning helium into carbon. This temperature rise is the cause. Helium is produced by nuclear fusion of hydrogen within the shell.

When carbon and helium combine, oxygen is formed. Helium burns to produce carbon. The surface temperature of a star increases as it evolves into a branched star, and the core becomes richer in carbon and oxygen nuclei. If its brilliance remains constant, stars with mass greater than the Sun will shrink and heat up.

When heated enough, the hydrogen in the shell outside the core can start to melt. Exterior unfolds.

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The response is C. It has bulk and occupies room. All substance has a volume and takes up space, whether it be a solid, liquid, or gas. It is a basic characteristic of matter. While matter can move from hot to cold and perform work.

A metal-skinned hull, steam propulsion, and a main armament of guns equipped to fire explosive shells are the three qualities that define a fighting ironclad. All of these innovations reached their full maturity with the French Navy's November 24, 1859, launch of the "Gloire," but the US Civil War saw the invention of the ironclad.

Any attribute that may be measured, such as a substance's mass, volume, length, density, colour, malleability, or melting point Properties of matter include point, hardness, smell, temperature, and more.

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Answer: D

Explanation:

When a 5.00 m-long ladder, with all weighing of 200 n, rests among a smooth vertical type of wall, then the ladder, will be measured among the the height = 0.488 m.

If θ be the angle ladder makes with the plane

cos θ = 1.2 / 5

Tan θ = 4.04

Let the height a person of weight 600 N  can climb be h from the ground .

Distance from the base point  where ladder touches the floor  = h / tanθ

= h / 4.04

Total reaction force = total downward force

R = 200 + 600

800 N

Frictional force = μ R

= .2 x 800

= 160 N

Taking moment of force about the point on the ladder  where it  touches the floor  and balancing them

= 200 x 1.2 x .5 + 600 x   h / tanθ  = μ R x  1.2 / tanθ ( reaction  at the top point of ladder where it touches the wall is  R₁ and R₁ =μ R   )

= 200 x 1.2 x .5 + 600 x   h / tanθ  = 160 x 1.2 / tanθ

120  - 600 h / 4.04 = 47.52

120 - 47.52 = 600 h / 4.04

72.48= 148.51 h

h = 0.488  m  

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