What is the Force of Gravity of a 40 kg object on Earth?

Answer:

Potassium (K) and arsenic (As)

Explanation:

Energy levels are represented by the rows in the periodic table. Potassium and arsenic are in the same row.

ita called hematopoiesis

Answer:

A. planet < solar system < galaxy < universe

Explanation:

The universe is all the existing space, so it is formed by galaxies which are set of stars that hold together. This starts from solar system because they are surrounding by planets and other objects.

Therefore, the order form smallest to largest is

A. planet < solar system < galaxy < universe

One type of evidence that the Earth has been through colder conditions is the presence of glacial deposits, such as till, striations, and moraines.

Glacial deposit refers to the material that has been deposited by a glacier, either through direct contact or through the action of meltwater.

This material can include rock fragments of various sizes, ranging from fine-grained clay to large boulders, as well as sand and gravel. In some cases, the material may be sorted into distinctive layers, depending on the size and type of the particles.

Glacial deposits can be found in areas that were covered by ice during the last ice age, as well as in areas that are currently covered by glaciers. They provide important clues about the movement and behavior of glaciers and can also be valuable resources for construction and other industries.

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Moving away from the source causes the observer to measure a lower frequency and higher wavelength.

The frequency of the detected sound from a stationary source will change as a result of the observer's movement. Moving away from the source causes the observer to measure a lower frequency and higher wavelength.

The Doppler effect is a shift in sound wave frequency that happens when the source of the sound waves is moving in relation to a listener who is stationary.

The wave propagates the sound energy throughout the medium, typically in all directions and with decreasing intensity as it gets further away from the source.

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The magnetic field 6.80 cm from a long, straight wire carrying a current of 7.86 A is approximately 1.46 x 10^(-5) Tesla.

To find the magnetic field 6.80 cm from a long, straight wire carrying a current of 7.86 A, you can use Ampere's Law in the form of the Biot-Savart Law. The formula is,

B = (μ₀ * I) / (2 * π * r)

where,
- B is the magnetic field
- μ₀ is the permeability of free space, which is 4π x 10^(-7) Tm/A
- I is the current, which is 7.86 A
- r is the distance from the wire, which is 6.80 cm or 0.068 m


1. Convert the distance to meters: 6.80 cm = 0.068 m
2. Plug the values into the formula: B = (4π x 10^(-7) Tm/A * 7.86 A) / (2 * π * 0.068 m)
3. Simplify and calculate the magnetic field: B ≈ 1.46 x 10^(-5) T

A long, straight wire carrying a current of 7.86 A produces a magnetic field 6.80 cm away that is roughly 1.46 x 10(-5) Tesla strong.

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The force that is needed to accelerate the arrow is 49 Newtons.

To determine magnitude of the force needed to give a 0.25 kg arrow an acceleration of 196 m/s², we can use the equation of force:

F = ma

where F is the force, m is the mass, and a is the acceleration.

Given that m = 0.25 kg and a = 196 m/s², we can substitute these values into the equation and solve for F:

F = (0.25 kg)(196 m/s²)

F = 49 N

So the force needed to give a 0.25 kg arrow an acceleration of 196 m/s² is 49 N. This is the correct answer out of the options given.

To arrive at this answer we used Newton's second law of motion, which states that the force acting on an object is equal to the mass of the object multiplied by its acceleration. Thus, we were able to use the equation "F = ma" (where F is force, m is mass and a is acceleration) to solve for the force required to accelerate the arrow at 196 m/s².

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The ratio of time of flight for inelastic collision to elastic collision \((t_A :t_B)\) is 1:2

The given parameters;

Considering inelastic collision, the final velocity of the system is calculated as;

\(m_1u_1 + m_2u_2 = v(m_1 + m_2)\\\\m_1u_1 + 0 = v(m_1 + m_2)\\\\v= \frac{m_1u_1}{m_1 + m_2} \ -- (1)\\\\\)

The time of motion of the system form top of the table is calculated as;

\(v = u + gt\\\\v = 0 + gt\\\\v = gt\\\\t= \frac{v}{g} \\\\t_A = \frac{m_1u_1}{g(m_1 + m_2)} \ \ ---(2)\)

Considering elastic collision, the final velocity of the system is calculated as;

\(m_1u_1 + m_2 u_2 = m_1v_1 + m_2v_2\\\\m_1u_1 + 0 = m_1v_1 + m_2v_2\\\\m_1 u_1 = m_1v_1 + m_2v_2\)

Apply one-directional velocity

\(u_1 + (-v_1) = u_2 + v_2\\\\u_1 -v_1 = 0 + v_2\\\\v_1 = v_2 -u_1\)

Substitute the value of \(v_1\) into the above equation;

\(m_1u_1 = m_1(v_2 - u_1) + m_2 v_2\\\\m_1u_1 = m_1v_2 -m_1u_1 + m_2v_2\\\\2m_1u_1 = m_1v_2 + m_2v_2\\\\2m_1u_1= v_2(m_1 + m_2)\\\\v_2 = \frac{2m_1u_1}{m_1+ m_2} \ --(3)\)

where;

\(v_2\) is the final velocity of the block after collision

Since the bullet bounces off, we assume that only the block fell to the ground from the table.

The time of motion of the block is calculated as follows;

\(v_2 = v_0 + gt\\\\v_2 = 0 + gt\\\\t = \frac{v_2}{g} \\\\t_B = \frac{v_2}{g} \\\\ t_B = \frac{2m_1u_1}{g(m_1 + m_2)} \ \ ---(4)\)

The ratio of time of flight for inelastic collision to elastic collision is calculated as follows;

\(\frac{t_A}{t_B} = \frac{m_1u_1}{g(m_1 + m_2)} \times \frac{g(m_1 + m_2)}{2m_1u_1} \\\\\frac{t_A}{t_B} = \frac{1}{2} \\\\t_A:t_B = 1: 2\)

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Answer:

decrease

Explanation:

because it’s going to 180 meaning it’s becoming equal to the other and they cancel out

Answer: V = M1 U/ (M1 + M2)

Explanation: According to the question as the second mass is in rest therefore, the velocity of the second mass would be 0.

The law of conservation of momentum states that in an isolated system the momentum of two bodies before and after collision remain the same unless and until an external force is made to act upon it.

In this case as well when the bodies collide the momentum before and after the collision is going to remain the same.

Therefor,

M1 x U + M2 x 0 = (M1 + M2) x V

=> V = M1 x U/ (M1 + M2)

Hence the correct expression which represent V is M1 x U/ (M1 + M2).

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Answer:

the correct answer is option D or the last option

Succulent plants that live in warm, arid regions primarily use the CAM (Crassulacean Acid Metabolism) pathway. CAM is a specialized photosynthetic pathway that allows plants to conserve water and survive in dry conditions.

In the CAM pathway, the stomata of the plant's leaves remain closed during the day to prevent water loss through transpiration. Instead, they open at night to allow the entry of carbon dioxide (CO2), which is converted into an organic acid and stored in vacuoles within the plant's cells. During the day, when the stomata are closed, the stored organic acids are broken down, and the released CO2 is used in the photosynthetic process.

By separating the processes of CO2 uptake and photosynthesis in time, CAM plants can minimize water loss while still carrying out photosynthesis. This adaptation allows them to thrive in environments with limited water availability, such as deserts and other arid regions.

Examples of succulent plants that use the CAM pathway include cacti, agaves, and many species of the Crassulaceae family (hence the name "Crassulacean Acid Metabolism").

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Answer:

this seems really complicated

Explanation:

Answer:

Copper

Explanation:

The rate of water level rising when the water is 30 cm deep will be 1/30 m/min.

The term “volume” refers to the amount of three-dimensional space taken up by an item or a closed surface. It is denoted by V and its SI unit is in cubic cm.

The complete question is;

"A water trough is 10m long and has a cross-section which is the shape of an isosceles trapezoid

that is 30cm wide at the bottom, 80cm wide at the top, and has a height of 50cm. If the trough is being filled with water at the rate of 0.2 m3/min, how fast is the water level rising when the water is 30cm deep?"

b1 is the width of the water at a height at the bottom

b2 is the width of the water at the height at the top

The length of the trapezoid is L

The volume of the trapezoid is found as;

\(\rm V = 0.5(b_1 + b_2)hL\)

The breadth rises by 1 as the height does, therefore which implies

\(\rm \frac{dh}{dt} =\frac{dw}{dt}\)

The water's breadth at the combined height is [0.3 + h]

\(\rm V = 5h(0.3 +(0.3 + h))\\\\ V = 3h + 5h^2\)

After differentiation we get;

\(\rm \frac{dv }{dt} =3 \frac{dh}{dt} +10 h \frac{dh}{dt} \\\\\ \frac{ \frac{dv }{dt}}{3+10h}=\frac{dh}{dt} \\\\\ \frac{dv }{dt}= 0.2 \\\\\ h = 0.3 \\\\ \frac{dh}{dt} = \frac{1}{30} m/min\)

Hence the rate of water level rising when the water is 30 cm deep will be 1/30 m/min.

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The surface area of the earth with a radius of 6400 km is 5.14×10¹⁴ m².

The surface area of a solid object is a measure of the total area that the surface of the object occupies.

To calculate the surface area of the earth, we use teh formula below

Formula:

Where:

From the question,

Given:

Substitute these values into equation 1

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When an electron in a hydrogen atom drops from a higher energy level to a lower energy level, it releases energy in the form of a photon. The energy of the photon is determined by the difference in energy between the two levels.

In this case, the electron is dropping from the n=20 state to the n=7 state. The energy of an electron in the nth energy level of a hydrogen atom is given by the equation:

En = -13.6 eV/n^2

Using this equation, we can calculate the energy difference between the two levels:

ΔE = E20 - E7 = (-13.6 eV/20^2) - (-13.6 eV/7^2) = 9.68 eV

Therefore, the energy of the photon emitted is equal to the energy difference between the two levels, which is 9.68 eV. This photon would have a wavelength of approximately 128 nm, corresponding to the ultraviolet region of the electromagnetic spectrum.

In summary, when an electron drops from the n=20 state to the n=7 state in a hydrogen atom, a photon with an energy of 9.68 eV is emitted.

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Answer:

C

Explanation:

Since the reactant is higher in an exothermal reaction it will always be higher the product.

The second thinnest coating of magnesium fluoride for a lens system primarily used for 695 nm red light is approximately 503 nm.

Wavelength is the distance between identical points (adjacent crests) in the adjacent cycles of a waveform signal propagated in space or along a wire.

To determine the second thinnest coating of magnesium fluoride for a lens system primarily used for 695 nm red light, we will use the formula for thin film interference:

t = (mλ) / (2n)
where t is the thickness of the coating, m is the order of interference (1 for the thinnest coating, 2 for the second thinnest, etc.), λ is the wavelength of light (695 nm), and n is the index of refraction of MgF₂.

For the second thinnest coating (m=2), we can calculate the thickness:
t = (2 * 695 nm) / (2 * 1.38) ≈ 503 nm

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Answer:

f = 4000 / 30 sec = 133.3    vibrations/sec

P = 1 / f = .0075 sec       period of 1 vibration

The drawing of a parallel circuit shows that the points where one could switch off lights are:

Parallel circuits are circuits in which the components are connected in parallel to each other. This means that there are multiple paths for current to flow through the circuit. The voltage across each component in a parallel circuit is the same, but the current through each component can be different.

When the switch at point C is switched off, only a single bulb would be switched off which is the last one. At point B, the second and last bulbs would go off but at point A, all lights would go off as the power is cut below it reaches the bulbs.

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Similar to a head-on shot with the cue ball on a pool table, the projectile will come to rest and the target will move off with an equal velocity for a head-on impact with a stationary object of equal mass.

A collision is considered elastic if it does not result in a net loss of kinetic energy for the system. Momentum and kinetic energy are both conserved in elastic collisions.

Elastic collisions occur when there is no net loss of kinetic energy in the system as a result of the collision. Accidental crashes. Inelastic collisions are the kind of collisions when there is a loss of kinetic energy.

Elastic collisions preserve both kinetic and momentum energy. The total kinetic energy of the system prior to the collision is equal to the total kinetic energy of the system following the collision.

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Instead of asking this question go and study

Answer:

i think the answer is #3. :)

The boll's position is -2 m.

Displacement of a body is defined as change is position of the body with respect to certain point (origin) in certain direction. Due to having both magnitude and direction, it is a vector quantity. SI unit of displacement is meter.

According to the question,

Initial position of the ball with respect to the origin = +5 m.

displacement of the ball (ball moves) = -7 cm.

Then, final position of the ball = initial position + displacement.

= (+5 cm) + (-7 m).

= (5 - 7) m.

= -2 m.

Hence, the final position of the ball will be -2 m.

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The car’s average acceleration is 3m/s².

What is the Car's average acceleration?

The average acceleration in the question measures the change in the velocity of the car by the time it used to cover the distance.

Average acceleration of the car is the change in the velocity of the car by the change in the time the car traveled.

ΔVelocity = 4.5m/s -( -3.0m/s)

                = 7.5m/s

The initial velocity is negative 3.0m/s as the car started  moving  backwards.

The time is 2.5s

The

The average acceleration of the car = 7.5m/s ÷ 2.5s

                                                            = 3m/s²

In summary, the car coasting backward downhill at an initial speed of 3.0 m/s would have an average acceleration of  3m/s² After increasing the speed to 4.5 m/s at a time of 2.5s.

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Physical separation of a cup of red Kool-Aid into its component parts will not change the beverage's composition. An homogenous mixture would be the proper classification.

By adding sugar and Kool-Aid to water, a solution is produced, which is a mixture in which two or more ingredients are well combined. In this instance, the sugar and Kool-Aid are the solutes that have been dissolved in the liquid water, the solvent.

Mixture with heterogeneity: The mixture is heterogeneous, comprises two or more phases, and its composition is not uniform. It is physically possible to separate it. Sodium chloride and sand, for instance.

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The effect of changing one or more couples on the total moment acting on an object is that as the magnitude of a counterclockwise couple increases, the total moment increases.

A couple is a pair of equal and opposite forces acting on a body but not in the same line. As a result, there is a torque or moment. In a system, couples have an important role. They create rotational motion or tend to alter the system's angular momentum. The effect of changing one or more couples on the total moment acting on an object is as follows:

If a counterclockwise couple is increased, then the total moment will also increase. This is because the counterclockwise couple would create a counterclockwise torque. This means that the body will be rotating in the counterclockwise direction. Thus, the total moment will also increase.

On the other hand, if the magnitude of a clockwise couple decreases, the total moment will also decrease. This is because the clockwise couple creates a clockwise torque. This means that the body will be rotating in the clockwise direction. Thus, if the magnitude of a clockwise couple decreases, the total moment will also decrease.

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