why planets do not twinkle​

Answer:

The answer is C!!!!!!!

Becuz meters and seconds are derived into m/s²

Explanation:

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Answer:

C. 87 m/s^2

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Answer:

• Momentum always depends on the mass and speed/velocity of the body in motion.

Explanation:

\({ \tt{momentum = mass \times velocity}} \\ \)

Answer:

study of everything that helps to improve the home and the family

Explanation:

Answer:

➢ Home economics, or family and consumer sciences, is a subject concerning human development, personal and family finance, housing and interior design, food science and preparation, nutrition and wellness, textiles and apparel, and consumer issues.

Explanation:

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The initial speed = 25.16 m/s

The maximum height, H = 32.3 m

The initial speed, u = ?

The formula for the maximum height of a projectile is:

Substitute H = 32.3m and g = 9.8 m/s² into the formula and solve for u

The initial speed = 25.16 m/s

If the length is doubled in a solenoid with n loops, a cross-sectional area a, and a current I, the magnetic field will half its initial value.

B = μo N I / L

B = Magnetic field

μo = Permeability constant

N = Number of turns

I = Current

L = Length of the coil

After the length of the coil is doubled,

L' = 2 L

B' = μo N I / L'

B' = μo N I / 2 L

B' = B / 2

If the length is doubled in a solenoid, its field will be half of its original value. A solenoid is a type of an electromagnet. It is formed by a helical coil of wire. The coil's diameter is less than its length. It generates a controlled magnetic field.

Therefore, when the length is doubled in a solenoid, its field will be half of its original value.

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The current at point A = 3A, The current at B = 6 A, the current at C = 2.25 A, the current at D = 18 A.

The current flowing in the circuit is calculated as follows;

Same current will be flowing at point A and C since they are in series, while different current will be flowing in the rest of the circuit.

Total resistance  is calculated as;

1/R = 1/(3 + 9) + 1/6 + 1/2

1/R = 1/12 + 1/6 + 1/2

R = 1.33

The total current in the circuit;

I = V/R

I = 36 V / 1.33

I = 27 A

Current at B = 36 / 6 = 6 A

Current at D = 36 / 2 = 18 A

Current at A and C = 27 A - (6 + 18)A = 3 A

Current at A = 3 / 12 x 3 A = 0.75 A

current at C = 9 / 12  x 3A = 2.25 A

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Answer:12

Explanation:

Answer:

2

Explanation:

Answer:

Which ball has the least momentum? C. A 160 g ball that is rolling north across a field at 2.0 m/s

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Answer:

c.160 g ball that is rolling north across a field at 2.0 m/s

Explanation:

here the mass and the velocity matters

lesser the mass and velocity, lesser the momentum

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When a parallel beam of light passes through a convex lens, the rays become farther from one another when the come out. This process of rays is called ''to diverge''. The concave lens makes rays of light diverge, so it is called diverging lens.

There are many natural sources of gamma rays, including:

Gamma rays are a form of electromagnetic radiation that have a very high energy and a very short wavelength. They are a type of ionizing radiation, which means that they can knock electrons out of atoms and molecules as they pass through them. Gamma rays are produced by some of the most energetic processes in the universe, such as nuclear reactions, supernovae, and black holes.

Gamma rays have a higher frequency and shorter wavelength than X-rays, and are therefore more energetic. They can penetrate most materials, including concrete and steel, and are extremely harmful to living organisms. Exposure to high levels of gamma radiation can cause radiation sickness, cancer, and death.

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A quasar with a lookback time of 13 billion years is most likely to have the highest number of hydrogen absorption lines in its spectrum

Quasar is an abbreviation for quasi-stellar radio source. Quasars were given that name because, when they were initially discovered by astronomers in the late 1950s and early 1960s, they resembled stars. Quasars are not stars, though. They are young galaxies that are far away from us and are becoming more numerous as they approach the outer reaches of the visible cosmos, according to science. How are they still visible despite being so far away? Quasars are up to 1,000 times brighter than our Milky Way galaxy, which is the reason why they are so luminous. As a result, we are aware that they are extremely active and produce astounding amounts of radiation throughout the whole electromagnetic spectrum.

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Answer:

Explanation:

Impulse = Force × time

So 88× 3 =264!!

Answer:

264 kg*m/s

Explanation:

Explanation:

A. Up along the page

Using the law of the right hand

The expression -2 + 6D is a vector expression written in terms of vectors C and D.

Vector expression is a mathematical expression that uses vector operations to solve for a specific quantity. It is a combination of vectors, operations and scalar quantities, which can be used to represent physical quantities such as force, velocity, and acceleration. Vector expressions are used to solve equations related to vector spaces and vector functions. They can also be used to calculate the magnitude of a vector, the angle between two vectors, and the cross product of two vectors. Vector expressions are important tools in physics, engineering, and other scientific fields.

The expression can be expressed in terms of these two vectors by multiplying the -2 by C and the 6 by D. This results in the vector expression of -20 + 60D. This can be entered into the answer box using the notation described in the instructions by clicking the button under the menu in the answer box to create vectors. The resulting vector expression should be -20 + 60D.

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Answer:

The apparatus would need to be extremely delicate because of the very small values being measured, the gravitational attraction of two massive objects.

(I) the torsion constant, measuring the deflection of massive objects would be very small and difficult to measure accurately

(II) since all surrounding objects are massive, it is difficult to remove the effect of such objects from forces being measured

(III) to consider a massive object as having all of its mass at its center, the massive object would need to be uniform throughout - any nonuniformity of the object would affect the calculations

(IV) all physical measurements would need to be made with utmost accuracy because of the relatively small distances involved with regard to the extremely small force being measured

(V) today laser measurements would assist in measuring small deflections accurately

The Hardy-Weinberg equation is a mathematical model that predicts the frequencies of alleles in a population. It is in equilibrium and not undergoing any processes such as natural selection, mutation, migration, or genetic drift.

In an ideal scenario, a population in equilibrium has no net change in allele frequencies over time, and the Hardy-Weinberg equation can be used to predict the genotype frequencies. However, if any of the evolutionary processes are operating, the population is not in equilibrium, and the Hardy-Weinberg equation does not apply.

The Hardy-Weinberg equilibrium is a principle that states that the frequency of alleles in a population will remain constant from generation to generation in the absence of certain factors. These factors include genetic mutation, gene flow, genetic drift, natural selection, and nonrandom mating.
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Answer:

Below

Explanation:

You have total current correct   3 A    from the ammeter in the circuit.

Must find total resistance to calculate the Vt

  the two resistors in parallel =   12 * 6 / (12+6) = 4 Ω

     then add this equivalent R to the other R that is in series  

              8 + 4 = 12 Ω      < ====   Rt

then   Vt = It Rt

          Vt = 3 * 12 = 36 v

V1 = It R1 = 3 * 8 = 24 V

V2 and V3 are equal and would be the voltage left 36-24 = 12 v

     or you could calculate V2 and V3        V2 = V3 = It R = 3 ( 4 Ω) = 12 v

Answer:

Bismuth And Nitrogen

Explanation:

Because they have the same number of Valence Electrons

Answer:

There is nothing above oxygen but beneath there is sulfur as shown in the figure.

Answer:

117.88m

Explanation:

We can use the formula [ s = ut + 1/2at^2 ] to solve this problem.

We know that constant acceleration is a = 9/8m/a^2, the initial velocity is 0,  and the height is 87 so the only variable we need to solve for is "t".

87 = 0t + 1/2(9.8)(t^2)

t = √174/9.8

t = 4.21s

Now multiply the time by the speed given.

28m/s * 4.21s = 117.88m

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At aphelion, the Earth is 96% of the Earth-sun distance at aphelion which means that the correct statement is that at aphelion, because the gravitational attraction is lower, the speed of the Earth is higher and is denoted as option B.

This is referred to as the  farthest point in the orbit of a planet such as the earth from the sun.

In a a scenario where the Earth is 96% of the Earth-sun distance at aphelion, then it means that the orbit has almost been completed which means that a high amount of speed was involved in the process.

This is as a result of the gravitational attraction being lower which has an inverse relationship with the speed of the Earth which is why it was higher and is therefore the reason why option B was chosen.

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The force due to gravity on a 41.63  kg object would be 408.39 N.

It can be defined as the force by which a body attracts another body towards its center as the result of the gravitational pull of one body and another,

The gravity varies according to the mass and size of the body for example the force of gravity on the moon is 1/6th times the force of gravity on the earth.

As given in the problem we have to calculate the force due to gravity on a 41.63 kg object.

Force= mass ×acceleration

The acceleration due to the gravity of the earth is 9.81 m/s²

Force = 41.63 ×9.81 N

         = 408.39 N

Thus, the force because of the gravity on a 41.63- kg object comes out to be 408.39 N.

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The force constant of the spring is 200.696 N/m & The height the object achieves when the spring releases its energy is 2.5087 m

The spring constant is the force needed to stretch or compress a spring, divided by the compressive or expansive distance. It's used to determine stability or instability in the spring, and therefore the system it's intended for. we know,

F = kx

Therefore,

k = F/x

We also know that the force being exerted on the spring is equal to the mass of the object. Hence, F = mg = 5.13 * 9.8 N = 50.174 N and we know compression due to the mass is 0.25m. Therefore,

K = 50.174/0.25 N/m

K = 200.696 N/m

Therefore, The Spring Constant is 200.696 N/m

On release, the spring potential energy gets converted to kinetic energy. Hence, on release, the height attained by the object is given by:

h = \(1/2 kx^{2}\)

We know that k=200.696 N/m and x=0.25 m. Therefore the height is:

h = \(1/2 (200.696 N/m)(0.25 m)^{2}\)

h = 2.5087 m

Therefore, the force constant of the spring is 200.696 N/m & The height the object achieves when the spring releases its energy is 2.5087 m

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Answer:

b

Explanation:

i know

Answer:

b one will not accelerate

Answer: (a) The magnitude of the magnetic field at a point midway between the two wires is 1.20 × 10⁻⁵ T and the direction of the magnetic field is out of the page.

(b) The magnitude of the magnetic field at a point that is 2.00 m below the point of part (a) is 2.93 × 10⁻⁷ T and the direction of the magnetic field is out of the page.

(a) The magnitude of the magnetic field at a point midway between the two wires is 1.20 × 10⁻⁵ T and the direction of the magnetic field is out of the page.  Between two parallel current-carrying wires, the magnetic field has a direction that is perpendicular to both the direction of current flow and the direction that connects the two wires.

According to the right-hand rule, we can figure out the direction of the magnetic field. The right-hand rule says that if you point your thumb in the direction of the current and curl your fingers, your fingers point in the direction of the magnetic field. As a result, the northern wire's magnetic field is directed up, while the southern wire's magnetic field is directed down. Since the two magnetic fields have the same magnitude, they cancel each other out in the horizontal direction.

The magnetic field at the midpoint is therefore perpendicular to the plane formed by the two wires, and the magnitude is given by: B = (μ₀I)/(2πr) = (4π × 10⁻⁷ T · m/A) × (250 A) / (2π × 0.600 m) = 1.20 × 10⁻⁵ T.

The magnetic field is out of the page because the two magnetic fields are in opposite directions and cancel out in the horizontal direction.

(b) The magnitude of the magnetic field at a point that is 2.00 m below the point of part (a) is 2.93 × 10⁻⁷ T and the direction of the magnetic field is out of the page.

The magnetic field at a point that is 2.00 m below the midpoint is required. The magnetic field is inversely proportional to the square of the distance from the wires.

Therefore, the magnetic field at this point is given by: B = (μ₀I)/(2πr) = (4π × 10⁻⁷ T · m/A) × (250 A) / (2π × √(1.20² + 2²) m) = 2.93 × 10⁻⁷ T. The magnetic field at this point is out of the page since the wires are so far apart that they can be treated as two separate current sources. The field has the same magnitude as the field created by a single wire carrying a current of 250 A and located 1.20 m away.

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