Why does the earth rotate

Answer: The correct answer is Option C.

Explanation:

Energy of the Electromagnetic Spectrum is given by the Planck's equation:

[tex]E=h\nu[/tex]

Where,

E = Energy of the wave

h = Planck's constant

[tex]\nu[/tex] = Frequency of the wave

And we know that,

[tex]\nu=\frac{c}{\lambda}[/tex]

where,

c = Speed of light

[tex]\lambda[/tex] = Wavelength of the wave

Putting the value of frequency in energy equation, we get:

[tex]E=\frac{hc}{\lambda}[/tex]

From the above relation, we get that energy is inversely related to wavelength of the wave.

From the spectra, we know that order of wavelength follows:

Infrared > Visible > UV

So, the order of energy gets reversed and the order becomes:

Infrared < Visible < UV

From the above information, we conclude that the correct option is Option C.

Asexual reproduction in bacteria involves one parent, resulting in genetically identical offspring. Sexual reproduction between a Tt mother and TT father produces offspring with genetic variation, either TT or Tt. Comparing both, asexual offspring are clones, whereas sexual offspring have varied genotypes.

In asexual reproduction of bacteria, there is only one parent, so the Punnett square will have only one genotype, which is T for the dominant trait. All offspring will also have the genotype T, as they are clones of the parent. However, for sexual reproduction involving a mother with genotype Tt and a father with genotype TT, the Punnett square will predict different genetic combinations. Here's how the Punnett square will look:

When these alleles are combined in a Punnett square for sexual reproduction, the resulting genotypes of the offspring can be TT or Tt. To compare and contrast, the offspring from asexual reproduction will all have identical genetic information (T), while sexual reproduction allows for genetic variation (TT or Tt).

Answer:

D) exerts a gravitational pull on the star it orbits

Explanation:

When light from a distant star appears to slightly red shift or slightly blue shift i.e., it seems to sometimes move away from us and sometimes move towards us, it is most likely to have planets around it. This method is known as Doppler spectroscopy.

This happens because of the unequal masses of the planet and the star the center of gravity does not lie in between them but rather in the star itself. Around this center of gravity the planet and the star will move. This causes the star to wobble.

Answer:

definitely A) it will not be able to be seen

Explanation:

Final answer:

The magnitude of the car's displacement is approximately 220.7 km.

Explanation:

To find the displacement of a car, we can use the Pythagorean theorem. The car drives 215 km east and 45 km north. We can treat the east direction as the x-axis and the north direction as the y-axis. The displacement is the vector sum of the east and north components.

The east component of the displacement is 215 km and the north component is 45 km. Using the Pythagorean theorem, we can find the magnitude of the displacement:

|displacement| = sqrt((215 km)^2 + (45 km)^2) = sqrt(46625 km^2 + 2025 km^2) = sqrt(48650 km^2) ≈ 220.7 km

Therefore, the magnitude of the car's displacement is approximately 220.7 km.

Answer:

220

Explanation:

A stationary front leads to prolonged weather conditions, primarily characterized by mild but continuous precipitation and consistent cloud cover, due to the stalemate between two contrasting air masses. These conditions can persist for several days, potentially resulting in flooding or affecting local climate and activities.

When a stationary front forms, the effect is typically prolonged weather patterns in the affected area due to the stalemate between two contrasting air masses. Neither air mass is able to dominate the other, leading to an extended period of clouds and mild but prolonged precipitation. This can result in several days of consistent weather, with potential impacts on local climate, agriculture, and daily activities. Stationary fronts are characterized by their lack of movement, meaning that the weather conditions they bring (like precipitation or cloud cover) can persist over an area much longer than with moving fronts.

Unlike cold fronts, which can bring rapid and significant changes in weather, including a drop in temperature and possible severe weather, stationary fronts lead to more steady weather conditions. However, the extended period of precipitation associated with stationary fronts can contribute to flooding and other water-related issues, depending on the region and other environmental factors.

Answer:

The end of the solar system is about 122 astronomical units (AU) away from the sun, where one AU is 93 million miles (150 million kilometers).

Most of the galaxies are 1,000 to 100,000 parsecs in diameter

The size of the universe is unknown

The universe is the largest scale, consisting of all the galaxies. A galaxy is a system of stars, planets, gas, and dust. A solar system is a smaller part of a galaxy, consisting of a star and orbiting objects.

The universe, a galaxy, and a solar system differ in their relative size and composition. The universe is the largest scale, and it consists of all the galaxies and other celestial bodies. A galaxy is a vast system of stars, planets, gas, and dust held together by gravity. A solar system is a smaller part of a galaxy, consisting of a star (such as the Sun), planets, moons, and other objects that orbit the star.

The universe is believed to be endless, but it is expanding. The galaxies are distributed throughout the universe and are separated by large distances. So, while the galaxies and the solar systems within them have definite boundaries, the entire universe is continuously expanding and may not have a finite edge.

The force acting on objects connected by a string results in a tension in the string

The tension in the string is approximately 36.2208 N

The reasons why the above values are correct are as follows:

The given parameters are;

Mass of the block, m₁ = 4.50 kg

Mass of the ball, m₂ = 7.70 kg

Path over which the string connecting the two blocks passes = Frictionless pulley

Coefficient of friction between the block and the surface, μ = 0.300

Required:

(a) To find the acceleration of the two objects and the tension in the string

Solution:

The motion of the system is due to the weight of the ball, m₂·g

The opposing force to motion of the system is due to friction of the block, m₁·g·μ

The block and the ball connected by the string have a common acceleration given as follows;

(m₁ + m₂) × a = m₂·g - m₁·g·μ

Where;

a = The acceleration of the two objects

Therefore, we get;

[tex]a = \dfrac{g\cdot (m_2 - m_1\cdot \mu_k)}{m_1 + m_2}[/tex]

Which gives;

[tex]a = \dfrac{9.81 \times (7.70 - 4.50\times 0.300)}{4.50 + 7.70} \approx 5.106 \ m/s^2[/tex]

The acceleration of the two objects, a ≈ 5.106 m/s²

Tension in the string:

Tension in the string, T = m₂×(g - a)

∴ T = 7.70 × (9.81 - 5.106) ≈ 36.2208

The tension in the string, T ≈ 36.2208 N

(b)  The force due tension in the string is given as follows

The force due to friction = 4.50 × 9.81 × 0.300 = 13.2435

Force due to friction, [tex]F_f[/tex] = 13.2435 N

Net force acting on block, F = T - [tex]F_f[/tex]

∴ F  = 36.2208 N - 13.2435 N = 22.9773 N

The acceleration of the block, a, is given as follows;

[tex]a = \dfrac{22.9773}{4.5} \approx 5.106[/tex]

Therefore, the acceleration, a is correct as a ≈ 5.106 m/s²

(c) From the equation for acceleration, we have;

[tex]a = \dfrac{g\cdot (m_2 - m_1\cdot \mu_k)}{m_1 + m_2}[/tex]

When the acceleration is increased by 60%, we get

60% increase of a = 1.6·a, and the new mass of the ball = m₃, which gives;

[tex]1.6 \cdot a = \dfrac{g\cdot (m_3 - m_1\cdot \mu_k)}{m_1 + m_3}[/tex]

Plugging in the known values of a, m₁, g, and [tex]\mu_k[/tex] gives;

[tex]1.6 \times 5.106 = \dfrac{9.81\times (m_3 - 4.5\times 0.300)}{4.50 + m_3}[/tex]

1.6 × 5.106 × (4.50 + m₃) = 9.81 × (m₃ - 4.5×0.300)

8.1696·m₃ + 36.7632 = 9.81·m₃ - 13.2435

9.81·m₃ - 8.1696·m₃ = 36.7632 + 13.2435 = 50.0067

1.6404·m₃ = 50.0067

[tex]m_3 = \dfrac{50.0067}{1.6404} \approx 30.48[/tex]

The added mass Δm = m₃ - m₂

∴ Δm = 30.48 kg - 7.70 kg = 22.78 kg

The required additional mass to increase the downward acceleration by 60%, Δm = 22.78 kg

Learn more about motion of connected bodies or objects here:

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Answer:

I'm not sure if this is true but I think that gravity depends on weight is not true

More work was done on the baseball that went out of the park because it traveled a greater distance. Work in physics is determined by applying a force over a distance.

In physics, work is defined as the amount of energy transferred by a force over a distance. The equation for work is 'W = Fd' where 'W' is work, 'F' is force, and 'd' is distance. In the question given, the force applied to both baseballs was the same but the distances they traveled were different. The baseball that went out of the park traveled a greater distance. Therefore, more work was done on the ball that went out of the park, because the same force moved it over a greater distance. So the correct answer is 'c. The ball that went out of the park shows more work because the distance was greater.'

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If a droplet has 3 extra electrons, the measured charge will be three elementary charges.

Therefore, if a droplet has 3 extra electrons, the measured charge will be three elementary charges.

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Answer:

A) Only plants use solar energy in a chemical process to produce food.  

Explanation:

The primary source of energy on Earth is Sun. Green plants are at the beginning of food chain because only green plants can convert solar energy to a form which can be consumed by animals. Plants make food in process known as photosynthesis where in sunlight is used to convert carbon-dioxide and water to form glucose and oxygen. This glucose is eaten by animals from which they get energy to do work. Smaller animals are eaten by bigger continuing the food chain ahead.

Answer:

Apparent magnitude

Explanation:

Brightness of a star depends upon the distance, size and temperature of the star. The brightness is represented by magnitude. These are the numbers which extend towards both negative and positive axis. more negative means more bright. Apparent magnitude represents the brightness of the star as observed from the Earth. Absolute magnitude represents the brightness of the star at a distance of 10 parsec from Earth.

The term that represents brightness of a celestial object is : ( B ) Apparent magnitude

The brightness of a celestial body depends on certain conditions which are :

The apparent magnitude of a clelestial body is the brightness of the body as measured from the earth's view. the brightness of a celestial body is measured on a scale of numbers ( magnitude ) which runs from positive tot negative values. The brighter the body the more negative the magnitude value

Hence we can conclude that The term that represents brightness of a celestial object is : ( B ) Apparent magnitude

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Answer: Option (a) is the correct answer.

Explanation:

Chemical properties are defined as the properties that show chemical nature of a substance or compound.

For example, toxicity, reactivity, combustion etc are all chemical properties.

Properties in which there is no change in chemical nature of a substance is known as physical property.

For example, solubility, density, volume, mass etc are all physical properties.

When a substance becomes corrosive in nature then it means oxidation of substance has occurred.

When concentration of hydrogen ions increases then it means acidity of a substance increases.

When an acid comes in contact with a metal then it releases hydrogen atoms.

For example, [tex]2HCl + Mg \rightarrow MgCl_{2} + H_{2}[/tex]

When we add an acid to a base then it will result in the formation of salt and water.

For example, [tex]HCl + NaOH \rightarrow NaCl + H_{2}O[/tex]

An acid does not feel slippery but a base feels slippery on touch.

Thus, we can conclude that chemical properties of an acid include corrosive, increases the concentration of hydrogen ions when added to water, forms hydrogen gas when it comes in contact with a metal, and forms salt and water when added to a base.